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Showing posts with label Tejas IOC. Show all posts
Showing posts with label Tejas IOC. Show all posts

Monday, January 10, 2011

Tejas Pilots' Hall of Fame: Meet the stars who touched the skies with glory; IOC for LCA today

Test Pilots who have flown LCA so far (below).

The NFTC Team: Air Commodore Rohit Varma, Group Captain George Thomas, Group Captain (Retd) Ritu Raj Tyagi, Group Captain K K Venugopal, Group Captain Suneet Krishna, Lt Cdr Ankur Jain (All Test Pilots); Wing Commander (Retd) PK Raveendran, Group Captain D Chakravorty, Wg Cdr M Prabhu, Wg Cdr S Toffeen, Wg Cdr A Kabadwal, Cdr J D Rathuri (All Flight Test Engineers); B.Uma Shankar; Revathy Vivekanandan, David Livingstone, Debadatta Maharana, Ashwathy, Ravindra Mohan Nigam, Koteshwar, Prateek Sinha and Rajat Mallick (All Scientists).
(The 4-part series on Tejas backroom boys, ends here. It was a non-stop 18-hour blogging on Sunday Jan 9! Hope  hope You enjoyed reading the same.)
Backroom Boys Series 

World-Beaters: The fly-by-wire FCS will take India to new heights (Part-III-B)

(Part-III-B of Backroom Boys Series on ADE)
P.S. Krishnan, ADE Director, reminded me of my Mathematics lecturer during my aborted BE days in Latur. This piece is the result of the session he and his team gave me. He began with a PPT which had 87 slides with the title Tejas FCS Design – Lessons Learnt. In between, he asked some of his team members to explain how they went about crossing all the hurdles in designing a state-of-the-art FCS. When he finished the talk, his team members were ready with their side of story. (My hands have swollen! Honestly last one week. Jesus!)
Sanctions did not snatch away our pride or passion, but propelled our mission to develop a world-class FCS: P.S. Krishnan, ADE, Director
Sanctions which seemed like a show stopper for the LCA actually became a blessing in disguise. We rectified the loop holes in the requirements, developed system integration tests from the scratch, worked together as an integrated team across organization with the single goal of Flying LCA. Many layers of tests and reviews ensured once flying we will not repent. All the hard work paid off with the first flight of LCA on January 4, 2001 followed by 10 years of LCA test flights (1,510 sorties as on 9.1.11), without any FCS failure. After first flight due the IT boom, we had another challenge with the majority of the team left for the better avenues. Thanks to the core team which decided to continue the dream and take it to the higher horizons.  It’s the endless team effort which has resulted in the flawless flights of Tejas aircrafts across the country in all the weathers – be it the hot weather trials, cold weather, low altitude , high altitude and weapon trials. Soon after Sanctions, in 1998, we had a meeting in Delhi chaired by Dr Kalam (May 23, 1998). Dr KGN was there. By then we had finished 30 per cent of work in terms of volume, but in terms of criticality, we knew only 15 per cent of the work was only over.
Dr Kalam didn’t even utter a word or gave any hits to us about Pokhran: P.S. Krishnan
What surprises me even know is that, Dr Kalam didn’t give us any hint about the N-test in Pokhran. He kept it as a top secret. But he kept on asking us, ahead of the N-test about the progress of our work and wanted us to speed-up things. Now, when I look back, I think he knew that Sanctions would come. We owe a lot what we have achieved today to Dr Kalam.
We ran the show with no man power, no experience, poor salaries, hurt feelings and snakes to fear: Dr V. Kala, Sc G, PD (LCA-FCS)
We had 4 designers and 4 testers in 1993. No man power, no experience. No tools and 50 per cent of us were ladies. And, the government rule says that if you are woman, you can’t work beyond 6 pm. But with all issues revolving around the LCA project, we decided to give everything. During those days it was a remote building and we were scared to move around after 6, due to snakes. Permission was denied to get our two-wheelers inside, despite all these issues. Once, Dr Kalam came to the lab and he had to encounter a snake. The rest is history. We were given permission to get the vehicles.
We had to a huge challenge to make the design document within 3 months. We used to go home sometimes at 2 am and family life went for a toss. Some of our colleagues left the job due to the tough conditions. We stuck on and from that batch, there are only 3 scientists left, including me. (The others are: Asha Garg, Sc F and Sreekalakumary, Sc E.)
Even we impressed the GE A/C management with our ETS: Gurdev, Group Director
The GE A/C management was very impressed with the systems given by ADE. They even invited us (ADE) to bid for developing such systems for their own projects. This was definitely a never-heard-before in DRDO. A total of 5 such ETS have been built and are the workhorse for ATP, HSI, V&V, PIL open loop/ closed loop, fault free tests at HAL Iron Birds. These systems are operational since 1995 and have been used for all DFCCs & software operational in various LCAs flying so far.
We took all the insults in our stride, but knew Jan 4 (2001) and Jan 10 (2011) would come one day: Shashidhara B.P., Sc (F)
People used to make fun of us and ask us, why make LCA? Why make another Suranjandas Road? (Suranjan Das Road is a popular stretch in Bangalore that cuts across a number of defense establishments.  The stretch is named after the great Test pilot Gp Capt Suranjan Das, who had a fatal crash on the HF-24 Mk IR prototype in 1970.) Then there were comments on the simulator, which according to some looked like a pig. We are proud that we survived all the onslaughts and achieved our goals. May be, we survived to tell you this story.
Lack of knowledge did us in, but not lack of commitment: Y. Dilip, Sc F
Initially, we must admit it was the lack of knowledge that did us in. But we were quick learners amidst all the mess. It’s unfair to comment or question our commitment and passion. We worked when there was shortage for Flight Control Computers. Today, the pilot knows what we have given him. He knows its value.
We were all young, energetic and designing FCS for Tejas was a dream: Asha Garg, Sc F
Our average age in the team then was around 30. We were the software group. We were all chasing a big dream. We would never give up, even now. The Tejas project gave us an excellent starting point to our careers. We designed with precision and tested to perfection, which gave us the confidence to sit and monitor each flight. Even now, one of us will always go and monitor in real time all the flights. We have not missed a single flight in the last 10 years (1510 sorties.) It gives the pilots a huge confidence. Many companies tried to lure us (even now), but we can never leave this program. It’s the challenge of working with LCA that keep us going. Tejas is not a project, but a way of life for us. In 10 years, we have seen 18 different versions (upgraded) of software in Tejas.
Why cross the continent, when we can do it? Sreekalakumary SI, Sc E
Though Sanctions did nothing to dampen our spirits, it shook us for a day or two. I was very young then and was at Lockheed Martin. We were 5 of us. We knew about Pokhran N-test. On May 15, 1998 around 11 am suddenly our computers went blank. We were told to stop work. Not to carry even a pin-head from there. Even while going to the toilet, the security used to escort and wait outside. Our Defense Ambassador in US took care of us. We made phones calls back home. Everyone was worried. Interestingly, we had to pay to get back some of our stuff (not personal belongings) after 2 years of Sanctions. But, we learned professionalism from US chaps. Later, we thought why cross the Continent, when we can do it ourselves? Dr Kalam was mentoring us well. He said: “All we Indians should join together and please wok together for Tejas.” We told him about our poor salaries and he said he would help. And he helped.
I have seen how the pilots would get tense before the maiden flight: Bhatia, Sc D
I have seen many pilots come and fly the simulator at ADE. I have seen them tense before every maiden flight. I have seen them checking the fail mode, again and again. Especially, Kothiyal, before the first flight, would land up here every day to fly the simulator. He was very focused. I used to watch him very closely. And, when he made that famous statement, I knew, the worth of work. (Kothiyal had said that he felt like flying the simulator, soon after the TD-1 maiden flight.)  It is a matter of great pride to the Real Time Simulator (RTS) development team that this is the only dome- based simulator currently operational in the India with almost zero downtime and close to 100% indigenous content. The ever evolving requirements of LCA thus could be easily met by indigenous RTS technology.  Alternative imported systems come with lot of hidden costs and one needs to be at the mercy of the supplier to overcome cost and schedule overruns.   The RTS is comparable to any other simulators elsewhere in the world be it the one used for  Euro fighter-Typhoon or the F35-JSF of USA in terms of technology.  With the completion of IOC /FOC for LCA and its induction into the IAF in the near future, RTS takes up the role of a full-fledged mission simulator meeting the training needs of the squadron pilots with near replica cockpit of the squadron standard aircraft.

You need tones of self-motivation to work in DRDO and media should not scare away youngsters: Bipin, Sc C, FCCD
I am working with LCA project for the last 6 years. I am from a middle-class family and come from a small village (Rajdhanwar) in Jharkhand. I joined NIT Jamshedpur in 2000 for BE (Electronics) and four years later got selected to DRDO through campus recruitment. Many people told me not to join DRDO saying it’s a white elephant. I was getting just Rs 11,000 per month then and now things have changed. If you want to stay in DRDO a very important thing you need is self-motivation. It is not that I did not get any offer from other companies, but I wanted to work for LCA and wanted to see it in the IAF. I am also lucky in the sense that I have got a very good working environment. I was in the design team that developed the Air Data Computer (ADC) for LCA, which was flown successfully on 23 April 2010 onboard LSP3. With Tejas getting its IOC finally, I feel I have not done any mistake joining DRDO, as my close friends thought. And, back in my village, I am sure all my relatives and friends will be happy seeing the IOC news. I want more people from remote villages, who are talented, to come forward and join DRDO. I request the Media to encourage more people to join DRDO and don’t scare them away.
Youngsters like Ruchi, Badrinath and many more chipped in with their views. The debate continued even while having lunch, including potshots at Media. Everyone had something or the other to share.
I could see the new India speaking confidently. The India of tomorrow has arrived at our defense labs, in case you didn’t know.
The FCS story is just that!
Team FCS: PS Krishnan, Director, ADE; S Gurudev, Group Director, Dr V Kala, PD (LCA-FCS), Jai Narayan, Shailendra Shourya, VikashKumarKushwaha, SK Raviray, Vardhamana, Sreesha Sijjin Babu, Supratim Chakrabarti, Jayaram, HK Naveen, S Shivashanka, BA Mohan Kumar, N Uma, Deepa Jain, Jayashree Hegde, Ujjwal Kumar Sarkar, Harikiran, Manoharan, Rafiq Ara Khanum, Selvanayagi Rajagopal, AC Shobha, TR Vijayakumar, Vijayan, Vijashree J., Rajendran, YN Prakash, PK Jayaram, Purushotham M, Raghu Raj, Dr Thimme Gowda, Ramamanohar KG, Ramar, Sudharani Srivoleti, Neeta Trivadi, Shantisheela, SantoshKumar, Chandrashekar VS, Shashidhara BP, Yashpal Bhatia, Cynthia Surya, Binesh Kumar K, Magesh G, Hemanth Kumar, Prem Ranjan, R Thogai Vani, Ashutosh Tiwari, Vinay Kumar, A Ramakrishna, Sundramurthy BV, Champa AR, Anandan M, Bhoopalan N, Asha Garg, Sreekalakumary SI, Saumya Basu Thakur, Packiadhas  IA, Shiba Hizkial, Devesh Kumar, Amit Chakma, Sanjeev Palkar, Shishir D Bhat, Vinay Kumar Agrawal, Chellam Natarajan, Noble Shaw I, Vidyakala S Rajan, Vijayalakshmi D, Srinivasulu, Usha Kiran Shetty, Yadhunandana S, Sreedhar, Shridevi, Preeti Ninan, CM Premila, Y Dilip, Badari Narayan R, Ruchi Srivastava, Vijayanand P, Bipin Kumar Lahkar, Himanshu Shekar Palak, Manoj Kumar Verma, Chandra Shekar KH, Ravi Krishnan Unni, Subramanya GA and Valarmathi Nagaraj. SrinivasRao,  
Team FCS wants Tarmak007 to acknowledge the contributions made by: Dr KG Narayanan, Vice Adm SK Ray, NH Sathya Raja, Janarthanan, PB Sadalgi, LR Nagamoorthy, AK Nath, Ajay Raman, Subba Rao, KA Ramakrishna, G Elangovan, Harish Chandra, S Kothari, Ganesh Nagesh Rao, Suresh Kumar, CU Hari, Sashasayan, Raghav Rao, Ramakrishanan, AV Sabnis, Oomen, Sanal Kumar, Bala Subrahmanyam and Devraj.
Backroom Boys Series 

Sunday, January 9, 2011

3. Surviving Sanctions only to become World-Beaters: Tracking the fly-by-wire FCS story from ADE (Part-III-A)

THE BACKROOM BOYS
TEAM FCS-ADE PART-I
Part-1
(This is purely a tech piece. The human-interest story is in Part-II of World-Beaters)
ADE stepped into the LCA program with a major share of technical work -- the FCS, Avionics System and Flight Simulator. Being the only laboratory with prior expertise in flight control system of flying UAVs and expertise in building flight simulators, ADE was readily given this major responsibility. Feasibility study was carried out by Joint team of ADE, ADA, HAL and NAL on development, technical trade off and state-of-the-art Fly-By-Wire Flight Control System.
Joint development with American industry partner who had the expertise in designing and developing flight control systems with clear work share plan and SOW was worked out and thus ADE entered into contract with GE Aircraft, USA (BAE Systems, US during 1993). Data capture phase was carried out with the partner. Though BAE Systems, USA offered legacy and proven FCS for LCA program, well planned calculated risks were taken and preference was given to joint custom design & development of the FCS suite comprising of the sensors, actuators, flight control computer hardware, software with associated rigs and test systems for clearance of these integrated systems for LCA flights. ADE had a major role in the design & development of flight control computers Hardware with embedded flight critical software and test systems.
At ADE the team acknowledges the benefits of joint design & development with BAE Systems, USA, in absorbing the process and methodology as well as project and configuration management. The design was jointly done with the team from ADE deputed to USA.  The choice of the processor was made by ADE and wanted to lead the design of the CPU board. Accordingly BAE agreed to partition the digital module in to two sides with CPU – A1 and CPU – A2. The A1 side contained the I/O handling functions including the BAE specific digital ASIC. The A2 side responsibility was given to ADE where in the CPU and its interface to all the components on the board viz., the CPU interface to all memories, timers, interrupt controller, parity for SRAM. The A2 side interface also encompasses the vital Transputer (T805).
Preliminary and critical design reviews were held to deliberate on the adequacy of the performance and reliability, environmental compliance, testability, safety and quality control provisions incorporated in the design. The first Brass Board computer was built by BAE at their facility and integration of the hardware/software with indigenously built ETS started during 1995.
There was initial apprehension expressed in manufacturing this class of equipment in India due to special to type infrastructure and process required for the same. ADE worked closely with BEL in jointly establishing all critical technologies and processes, test equipment including the rigs, fixtures and tools required for indigenous manufacturing of DFCC in India. BAE Systems (USA) denied these process related information to India due to technology denial by US.
As per the workshare, Engineering Test Station, a complex real-time test system was designed and developed by ADE. Two of these systems were installed by ADE in M/s GE A/c, for use by ADE & GE engineers. The GEAC management was impressed with the systems given by ADE and invited ADE to bid for developing such systems for their own projects – a first for DRDO. A total of 5 such ETS have been built and are the workhorse for ATP, HSI, V&V, PIL Open loop/ closed loop, fault free tests at HAL Iron Birds.  These systems are operational since 1995 and have been used for all DFCCs & software operational in all the LCAs flying so far.
ADE also designed and developed automatic test systems for actuators and sensors which form a vital part in the testing of the FCS system to gain confidence before putting it on the aircraft. In additions there are onboard test panels required for Flight test for tests like flutter test. ADE has developed Flight Control Panel, Flight Test Panel for this.
ADE and BEL jointly completed building 3 Brass Board units, 6 flight worthy units. Concurrently the teams also build the necessary test equipment along with the necessary test software for SRU and LRU level testing of the DFCC. The LRU level ATP is written using the Laboratory Test Monitor (LTM) software exclusively developed by ADE and runs on the indigenously built Engineering Test Station (ETS) built by ADE. Variants of Group I ATP with sufficient coverage were also configured to clear the functionality of the DFCC during the ESS tests. As per the work share plan, all activities of fabrication, assembly, testing, integrating the DFCC, functional evaluation, Environmental Stress Screening tests & Qualification of the DFCC was total responsibility of ADE. All these activities were completed.
The DFCC incorporates state-of-the-art technology for chassis, printed wiring boards, board assembly and front panel inter-connection with the motherboard through flex circuitry.  The construction of the chassis is dip-brazed double walled construction with provision for forced air-cooling. Front panel is fitted with filter pin connectors incorporating polarization for different channels. The chassis design, grounding scheme, routing of the interconnections have been carefully designed to meet the stringent EMI/EMC requirements as per MIL-STD-461C. The DFCC is designed to operate up to 1 hour after failure in supply of cooling air.  The Printed boards are 10 to 22 layer type with heat sink bonding for thermal management.  The average power dissipation is around 300 watts and the unit weighs 27.8 kgs. The unit has been built with highest reliability to meet the PLOC requirements of 1 x 10-7 per hour and MTBF of > 1200 hours. The CPU is Intel 80960 32 bit RISC microprocessor.  Each of the four identical channels consists of one digital module, 3 Nos. of analog modules and one power supply module.  They are housed in a single box of 1 ATR (long). 
While the sensors were off the shelf, actuators were built specifically for the LCA which are of DDV class. Proving the Built in test which is robust and which can cover each of the component failure either on the servo electronics or the actuator was challenging. This forces another challenge of not to declare nuisance failures.
For a safety critical system of this class of aircraft, development of zero defect software was a major challenge. Work share was drafted to ensure that the OFP would be developed fully by ADE and the backup software will be done jointly. The backup was developed with the work partition as Software Specification to be done by M/s BAE Systems while Design, Code and Testing will be by ADE and the system integration jointly. This partition ensured that ADE has the full ownership on the software and can adapt to the changes and complete technology know how is available in India.  This software is first of its kind in India being developed for the Class I safety critical embedded application.
The process and methodologies to develop the software as per the standards (DoD std 2197) in 1990 was something challenging which has made ADE’s contributions to the fault control software development unforgettable. The formal process was followed by the Reviews as per MIL-STD 1521.
This class of software is not available to India from any of the foreign sources even today. In today’s world of patents it is impossible to get this kind of software along with source code. But for the LCA, As each byte of code is under our control, software can be reused, modified and adopted for the different variants of LCA as well as for the other future fighters.
In DRDO it was a new era to shift from Assembly to high-level programming (Ada – safe subset), following a strict software development process and methodology, recognition to the software engineering practices. BAE added to the confidence for paradigm shift and were critical since they were the certifying partners. This made ADE to put in enormous effort with handful of young people and limited resources. This made the team work for more than 15 hours/day which became worse due to the time difference between the two continents. It was 24X7 for the team with half working in India other half at USA.
Some of the highlights of the Onboard Software are Kernel working in real time, synchronization of the 4 identical computers, managing the redundancy to ensure accurate inputs for the Control Laws and the right drive to the actuators, software-controlled Built-In-Test for ensuring the health of the system before each flight.
When Sanctions were imposed during 1998 by USA, a major part of the work of hardware software integration, system integration activities were not completed. ADE had to take the challenge forward to successfully complete these activities with no support from M/s BAE systems. Two of the ETS systems were locked up for  4 years by GE A/c, as a consequence of the ‘Sanctions’ imposed by the US from 1998. The LCA-FCS community in India had to make to work with 3 systems round the clock to ensure maintenance of the pace of work.
Amongst the numerous pending technical issues the team had to resolve, the ones associated with the BAE specific ASICs used in then program for which complete information on use of these parts was very challenging. Among number of changes that were incorporated in the DFCC after sanctions, one important change was to remove the functionality of the DBU switchover and reconfigure the logic to work.  That means only one software, for the flight controls with no backup. This resulted in the removal of the backup logic from the software. This could be achieved because the software is written as maintainable software. Hence there was enhanced need of the quality and confidence in the only software responsible for the flight and assurance that there will not be any generic failures in the software.
The long term dependency on the BAE specific components used in the design of DFCC was a specific concern for future DFCC production. ADE was accorded a separate project sanction to indigenize all the BAE specific parts used in the program. Technical solutions were found for almost all of these BAE specific parts and proto types were realized functionally tested and qualified.
Integrated Cockpit Display system for LCA:  This consists of one monochrome Head Up Display, two colour Multi-Function Displays (LMFD and RMFD) and two Display Processors (DP) (dual redundant configuration). DP receives data on the MIL-STD-1553B avionics bus from Mission Computer and other LRUs, processes it and computes the relative positions of the symbols, generates the display symbology and updates them as display pages with flight information and status of various systems on-board, on the 3 displays, in real time. It monitors and conveys health status of the Cockpit Display System and pushbuttons/switches on the display surfaces to the Mission Computer.  It also monitors and handles the Multi Function Rotractor (MFR) data selection.  A Test Facility has been developed in-house to carry out Software Validation and Hardware Software Integration (HSI) and clearance of the entire Cockpit Display System. It simulates many functions of avionics to test the I/O interfacing in terms of data transfer and scheduling of messages with DP.
The Display software is the Second largest software component in the avionics suite of Tejas, display software (~80 Kilo Lines of 'C' code).  It is responsible for processing the data received from various LRUs and updating all the display surfaces simultaneously in real-time. The entire Cockpit Display System along with other Avionics LRUs was integrated in a Dynamic Avionics Integration Rig which was also designed and developed by ADE.
A total of 17 Display Processor Units ported with the latest upgraded software version and 3 Head Up Display Units have been delivered to ADA, which have successfully completed more than 800 flights in TD1, TD2 and PV1 aircraft.
Backroom Boys: Part 1 (CLAW-NAL)
Part-II: CEMILAC
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Tough nuts to crack, but here comes a safe Tejas


“We are not here to win hearts. Safety of Tejas is paramount and we have mastered the art of saying NO with a smile, if things were not in place. Once, I was even summoned by Delhi for not clearing a flight for a long time. I explained point by point and everyone was convinced. We were given an uphill task and we did it with all the honesty and sincerity. There might have been delays due to our firm stand, but our mission was to clear an aircraft that was Safe to Fly,” CEMILAC Chief Executive Tamil Mani, Distinguished Scientist, In-charge of Airworthiness and Certification was candid, as ever.
“We were attempting everything for the first time in the country. Tejas is an advanced fighter aircraft with cutting edge, state-of the-art technologies. Hence, the challenge was equal to the designers and the certification agencies. We are an independent  organization that takes  the responsibility to declare that the aircraft thus produced is Safe, Reliable and meets the desired performance as specified for IOC Phase-1, and is therefore ‘Fit to Fly’ by the squadron pilots,” Tamil Mani adds.
Certification team got activated the moment ASR was out
The Regional Centre for Military Airworthiness (Aircraft) (RCMA-A/C), a unit of CEMILAC, was tasked with the Airworthiness Certification of LCA, right from the time the Air Staff Requirement (ASR) were out for the LCA project in 1985. Certification of a complex project like LCA can be done only through a concurrent approach, where the certification team is involved in the project right from its conceptual stage. The first phase is the design evaluation phase, where RCMA (A/C) has carefully examined the design of all systems and evaluated the design as against the Requirements, Standards, Performance and Safety.
The proof of the pudding lies in testing the systems, which is the next phase of Certification. Test schedules are made to cover the functional and failure evaluation of the system. RCMA (A/C), by way of complete scrutiny of the requirement specifications and standards, ensured that the test schedule is correct and adequate. Before the first flight a Flight Clearance Note (FCN) is generated, capturing all the operational conditions, limitations and flight envelopes. Safety of flight is thereafter ensured through adherence to the FCN. Every test flight is accompanied by a Flight Test Schedule, thoroughly scrutinized and coordinated by RCMA (A/C) for its safety. It is a matter of pride that, today with 11 platforms flying, logging a total of 1500-plus flights, there has not been a single incident, which no other aircraft producing country in the world could boast off. This is a clear testimony to the focus and dedication of the LCA team, especially the certification authorities, CEMILAC and DGAQA, who have ensured adherence to stringent safety and inspection norms.
To ensure timely Certification of LCA for IOC-1, RCMA(A/C) drew a Route to Certification Document. This document took stock of all the completed activities for IOC and highlighted the activities that needed to be completed. Based on RCMA’s involvement at every stage of the program and also by careful examination of the requirements and test reports both ground and flight, involving local and outstation trials, activities such as Line Replaceable Unit (LRU) clearance, ASR compliance, Military Standard compliance, ground testing, flight testing and closures of all pilot and ground snags were clearly highlighted in the ‘Route to Certification Document.’
17 major systems, 346 LRUs, 33 software-embedded systems, 43 MilStds
To ensure systematic approach to clearance, RCMA (A/C) evolved a novel System Certification methodology. The aircraft was categorized into 17 major systems, with 346 LRUs and 33 software embedded systems. All the LRUs were certified by the issuance of Type approval. This ensured that the LRU has undergone complete qualification tests as stipulated by RCMA (A/C) and has met all Safety and Performance standards as laid down by CEMILAC. Each of the 17 systems is individually cleared and certified for its performance and safety over 1,500 test flights including outstation trials such as the hot weather, cold weather, high-altitude, sea-level and weapon trials. The design and testing of individual systems were evaluated as against compliance of top level requirements of the ASR and relevant Military Standards. There are 43 top level and several associated Military Standards to comply. RCMA (A/C) has ensured that Tejas is of an international product by complying with each and every requirement of all the relevant Military standards.  
Being an advanced fighter, there has been an extensive use of software in the flight controls, avionics and weapon management systems. A failure of which could infringe safety or a mission. Software was hence certified through stringent independent verification and validation through out its development life cycle, right from specification, design, implementation and testing at various levels.
We cleared the Tejas based on the demonstrated capabilities, says Tamil Mani, Distinguished Scientist, CEMILAC Chief Executive,   
We are responsible to identify the likely flaws. We conduct a series of tests and even fail many systems (at ground level) to see what happens. Not once, but many times. Every flight of Tejas is coordinated by us. We cleared the aircraft based on the demonstrated capabilities, and not on the design capabilities, not once but many times. Release to Service Document (RSD) defines the operational capabilities of the aircraft. Tejas has flown up to a maximum speed of 1,350 kmph and pulled 6G, so far. The remaining design parameters will be demonstrated in the next phase. ADA will have to do the full tests required by CEMILAC for approval. The journey so far has been very exciting and even we have evolved over the years. It is a mammoth task and great achievement by the designers, engineers, flight crew, pilots and many more. Remember, when the fly-by-wire system was designed, none of us really knew what it was. We have learned over the years. Everybody felt that we (CEMILAC) can’t do it. India is a country, were people say that the cup is half empty, instead of half full.
The arrival of PMT from IAF propelled Tejas project
During the course of the interview with the CEMILAC team, it was very evident that the Tejas program got a major boost with the arrival of the Program Management Team (PMT) from the IAF. According to CEMILAC officials, the PMT changed the face of Tejas program. “The communication became better and the correct feedback went to IAF. The Appreciation while executing various complexities of work started to pour in. There was better bonding between the user and the rest,” the CEMILAC team said.
MCA will be the biggest beneficiary of Tejas project: Kanchan Biswas, Sc G, Associate Director (Aircraft)
We were doing everything of this nature for the first time, though we had enough experience working on 14 platforms (including upgrades), before taking up the Tejas certification. The knowledge levels were also low and test facilities were not available initially. Today, with CAD-CAM, you can walk through an aircraft before it’s made. I am confident that the future programs will now become faster. The MCA project will gain immensely from Tejas. MCA will be the biggest beneficiary.
We had the guts to tell foreign suppliers to give quality products: P.R. Baghel, Regional Dir., RCMA
It’s a fact that we have set very tough quality standards. I remember an incident when rain drop test were to be done on Tejas ComSet and fungus test on some components. It had to be done on Indian conditions. It was a South African firm and there were some issues. They were trying to pass the buck on to our systems and eventually we put our foot down and said what went wrong. We have the guts to tell that what’s wrong. We won’t allow an iota of doubt to fall on us. Nobody should take us for granted. Our mission is to make Tejas safe.
I have grown with Tejas and she‘s like my child: Nirmala, Technical Officer ‘C’, Assistant Head of Electrical and Avionics Systems
We follow the SEIZE (Satisfaction, Experience, Inspiration, Zeal and Enhancement) philosophy of work.  I look after the hardware systems from the Avionics side. If there was delay in the program, then it was due to the lack of awareness and we are admitting it. But, that’s a thing of past and we have evolved. I am with this project for the last 10 years and I must tell that my male colleagues respected the technical capabilities. As a mother, I can say LCA is my baby. We have very strong sentimental attachment to this program and remember that we withstood all onslaughts.  Eventually, the program is the winner.
I was shivering when I cleared Tejas for its maiden flight on Jan. 4: Gracy Philip, Scientist F, Software Group Head
I joined the program when I was 22 years. The digital-fly-by-wire systems are very safety critical. Ours is a very demanding job and I have seen it inside out for the last 18 years. Our job was to get into a detailed analysis whenever a failure happened. I am grateful to God that everything has been smooth. I still remember my hands were shivering and heart beat doubling when I cleared the first flight of Tejas on January 4, 2001. When we look back, we have crossed many milestones. We are wedded to this project and very much insulated from all the bad publicity. Ultimately, the truth has arrived. You can call it by any name – IOC, FOC, Induction.
We cleared a system that’s a safe home for pilots: Pradeep Mahuli, Additional Regional Director, Aircraft Escape Systems
We have built in safety features in consultations with all the pilots. Today, even though there are a couple of non-safety critical issues to be closed, I can proudly say that Tejas is definitely a world-class product. I am responsible for clearances of aircraft escape system, environmental control system, life support system, brake parachute system and flying clothing. Here my hero is the pilot and I do everything for him. The ejection seats are tested in UK and also we carry out various flight-critical assessments. Having traversed this far and interacted with leaders in the world, we have today cleared Tejas with complete satisfaction.
We endured every bit of polite sledge: Peter Arun, Scientist E, Head IFCS
We are the people who give the Flight Clearance Note (FCN). Nobody could rock our boat and our focus was protected from all the negative and one-sided remarks on Tejas. We had a strong devotion for the program. We have waited, nurtured, grown and achieved. We knew it will happen. We endured every bit of polite sledge. We were given the space within CEMILAC to debate. To me, LCA is a joy for designers, delight for pilots and with great pleasure we cleared it for IOC.
We hope to find some time for our families now: Jeba Kumar, Scientist E (Head Aero & CLAW) and Giri, Scientist E (Head Structures)
Jeba: When I cleared the fixed CLAW in 1996, there were very few admirers even from within the project. We ignored all our personal pleasures in life and just focused on the project. All the accolades started to come late, when people realized our worth.
Giri: We understand the needs of designers and they too understand our needs. There are many things we have sacrificed in our lives. I hope we will find some time to be with our families now. I used to share this joke with my friends: After 6 pm if we reach home and the wife smiles. After 7, it’s a stare; after 8 verbal abuse and beyond that ‘out of control’!
That’s all folks from CEMLIC in this edition of Tejas’ story. At the end of it all, CEMILAC says there has been a paradigm shift in the project. Earlier they were branded as bureaucrats and now they are treated as partners. “When it comes to certification, we don’t have any attachment to any one unit or individual. Our attachment is to the program and we wanted to ensure its safety. We are the impartial on-field umpires,” concludes CEMILAC CEO Tamil Mani.
THE TEAM:  Venkatesha T.V., Sc D, Head Mechanical Systems; S.N. Giri, Sc E, Head Structures; S.K. jebakumar, Sc E, Head Aero & CLAW; M. Peter Arjun, Sc E, Head IFCS; S. Nirmala, Technical Officer "c", Asst. Head of Electrical 7 Avionics Systems; Gracy Philip, Sc F, Head, Software Group, Pradeep Mahuli, Addl. Regional Director, Aircraft Escape Systems; P.R. Baghel, Reg. Director RCMA (A/C); K. Tamil Mani, Distinguished Scientist & Chief Executive, CEMILAC; P.S. Deshmukh, Sc G, Grp. Director (Systems); G. Gouda, Grop. Director (Propulsions); R. Kamala Kannan, Sc F, Addl. Director and Kanchan Biswas, Sc G, Associate Director (Aircraft)
(Next, Part-3: FCS Team, ADE)

Monday, December 13, 2010

Tejas to demonstrate stores release at Chitradurga range

By Anantha Krishnan M. AVIATION WEEK |
Bangalore  India | December 7, 2010 |
India’s Aeronautical Development Agency is gearing up to start the last phase of flight trials for the Tejas light combat aircraft at Chitradurga in Karnataka, 100 mi. northwest of here.This will be the first time the new test range of the Defense Research and Development Organization will be put to use. Test pilots from the National Flight Test Center in Bengaluru are readying themselves to undertake the last leg of weapon trials/stores release in Chitradurga. “Currently, a series of trials are being done to characterize the aerodynamics of the platform,” a senior official associated with the program says. “This will be the first outing for Tejas in Chitradurga. We are now setting up the telemetry range.” Aviation Week has learned that accuracy studies will be done at Chitradurga when Tejas releases stores. “It will be dummy trials to start with,” the official says. “The pilots will be taking off from Old Bangalore airport and land after finishing their mission in Chitradurga within 10-12 minutes."

(This is a backlog update from Aviation Week to Tarmak007)
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