Abstract : The use of wrap around fins has been very popular in the development of artillery rockets.The rockets are housed in tubes and a wrap around configuration results in high volume efficiency. These rockets generally have range between 20Km to 60Km. The high performance artillery rocket achieves maximum speed of around 3.7 Mach. The unusual lateral-directional aerodynamics associated with the wrap around fin configuration causes serious flight dynamic and control challenges to the designers of these rockets. The talk will address such issues sharing hand on experiences and suggest some remedial measures.

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Abstract : The talk will be on a new algorithm on continuous sliding mode based on integral sliding mode control (ISMC) where the discontinuous part of the ISMC is replaced by continuous control. It is shown that the well known super twisting control (STC) which replaces the discontinuous part of the ISMC acts as a disturbance observer and hence cancels the matched disturbance. As the overall controller is continuous, the proposed method is advantageous over the existing integral sliding mode control, which has a discontinuous term. Also from the practical implementation point of view, in particular for mechanical systems, discontinuous term will result in chattering which is very much undesirable. Some implementation results on a practical system and its superiority will be also discussed.

Biography: B. Bandyopadhyay received his Bachelors degree in Electronics and Telecommunication Engineering from the University of Calcutta, Calcutta, India in 1978, and Ph.D. in Electrical Engineering from the Indian Institute of Technology, Delhi, India in 1986. In 1987, he joined the Interdisciplinary Programme in Systems and Control Engineering, Indian Institute of Technology Bombay, India, as a faculty member, where he is currently a Professor. In 1996, he was with the Lehrstuhl fur Elecktrische Steuerung und Regelung, Ruhr Universitat Bochum, Bochum, Germany, as an Alexander von Humboldt Fellow. He has been a visiting Professor at Okayama University, Japan, Korea Advance Institute Science and Technology (KAIST) S.Korea and Chiba National University in 2007. He visited University of Western Australia, Australia as a Gledden Visiting Senior Fellow. Professor Bandyopadhyay is recipient of UKIERI(UK India Education and Research Initiative) Major Award in 2007,"Distinguished Visiting Fellow",2009 award from "The Royal Academy of Engineering",London. Professor Bandyopadhyay is a Fellow of Indian National Academy of Engineering (INAE), Senior member of IEEE and a Fellow of IETE (India). He has published 8 books and monographs, 6 book chapters and more than 300 journal articles and conference papers. His research interests include the areas of higher order sliding mode control, multirate output feedback control, discrete-time sliding mode control, large-scale systems, model order reduction, nuclear reactor control and smart structure control. Prof. Bandyopadhyay served as Co-Chairman of the International Organization Committee and as Chairman of the Local Arrangements Committee for the IEEE International Conference in Industrial Technology, held in Goa, India, in Jan. 2000. He also served as one of the General Chairs of IEEE ICIT conference held in Mumbai, India in December 2006. Prof. Bandyopadhyay has served as General Chair for IEEE International Workshop on Variable Structure Systems held in Mumbai in January 2012.

Abstract : The classical philosophy of missile guidance laws was strongly rooted on the notion of driving the line-of-sight rate to zero in order to achieve interception. In fact, much of the modern development in the area of guidance law research used this philosophy as the central idea in achieving interception with the added requirement of optimality in time or energy. In doing this, the guidance strategies became rather limited in their application to many present day practical problems. This talk will discuss certain counter-intuitive notions in guidance philosophy which nevertheless work surprisingly well in situations that have become relevant in modern target interception scenarios, but which were earlier considered intractable in the classical setting. These basic counter-intuitive concepts will be extended to a generalized setting to show that they do have a very rational basis which also encompasses the classical concepts.

Biography: Debasish Ghose is a professor in the Department of Aerospace Engineering at the Indian Institute of Science in Bangalore and heads the Guidance, Control and Decision Systems Laboratory. He has a Bachelor’s degree from REC (now NIT) Rourkela, and a Master’s and PhD degree from the Indian Institute of Science, all in Electrical Engineering. His main research interests are in the area of guidance and control of unmanned aerospace vehicles and multi-agent system dynamics and control as applied to multi-robot systems. In the past, he has been a visiting professor in several universities including the University of California at Los Angeles. He is also on the editorial board of several journals including the IEEE Transactions on Aerospace and Electronic Systems. He is a Fellow of the Indian National Academy of Engineering.

Abstract : The objective of this paper is to review GPS-based technologies of precise absolute navigation and relative navigation of low-earth-orbit (LEO) satellites in formation. This development took place mostly in the U.S. and the Europe. In the U.S., Jet Propulsion Laboratory developed Global Differential GPS (GDGPS) and TDRSS (Tracking and Data Relay Satellites System) Augmentation Service for Satellites (TASS) that enable a decimeter-level real-time orbit determination of LEO satellites with integrated GPS/TDRSS receivers. The ionospheric delay is eliminated using GRAPHIC (Group and Phase Ionosphere Correction) with a single-frequency receiver, real-time global grid of ionospheric delay – a product of GDGPS, or by using dual-frequency receivers. For relative navigation of LEO satellites in formation, millimeter-level accuracy is required for remote sensing with synthetic aperture radar interferomery. To achieve this accuracy, JPL engineers form double-differenced carrier phase biases. Integer-valued fixing of these biases is performed with LAMBDA (Least-squares Ambiguity Decorrelation Adjustments) technique. The navigation techniques developed in Europe are much different. Because the GPS signals received by LEO satellites pass through a partial ionosphere, an ionospheric correction technique for partial ionosphere was developed at German Space Operation Center (GSOC). For absolute navigation of the LEO satellites, GSOC developed a reference algorithm that includes GPS High Precision Orbit Determination Software Tools (GHOST). GHOST incorporates empirical exponentially-correlated acceleration vector – a feature of the reduced dynamic orbit determination technique to estimate unmodeled accelerations influencing the satellite motion. The GRAPHIC algorithm is also a part of the reduced dynamic orbit determination technique. Precise ephemeris of the GPS satellites is obtained from International GPS Service (IGS), and the GPS clock offsets are provided by the Center for Orbit Determination in Europe (CODE). To design safe proximity operations and formation control of LEO satellites, an elegant formulation was developed at GSOC based on eccentricity vector and inclination vector separation, in use for decades for geostationary satellites. Using this formulation, guidance, navigation and control strategies were developed for satellites in formation. Extended Kalman filter (EKF) is used for GPS-based absolute and relative navigation of each satellite. The measurement vector for the extended Kalman filter consists of GRAPHIC data types for each receiver and single-difference carrier phase (SDCP) measurements related to the GPS satellites commonly visible to all satellites in the formation. These measurements are composed from concurrent pseudorange and carrier phase measurements of each receiver, the latter with integer ambiguities causing ambiguous biases in GRAPHIC data types and in SDCP. These biases are included in the state vector estimate along with each satellite’s position and velocity vector, aerodynamic drag coefficient, empirical acceleration vector, and clock bias of the receiver. Application of all these techniques to GRACE, PRISMA, and TerraSAR-X – TanDEM-X formations, with performance and illustrations, are included in the paper.

Biography: Dr. Hablani is Professor at the Department of Aerospace Engineering, Indian Institute of Technology - Bombay, Mumbai, where he teaches and conducts research related with dynamics, guidance, navigation and control of flight vehicles. Prior to joining IITB, Dr. Hablani taught at the Department of Aerospace Engineering, IIT Kanpur, for a year. He is a recipient of the Aeronautical Society of India’s Excellence in Aerospace Education Award in the year 2012. Before returning to India, Dr. Hablani was with The Boeing Company (Rockwell International heritage) in Southern California, USA, from 1982 to July 2008, where he was responsible for detailed design and simulation of guidance, navigation, and control of spacecraft and strategic interceptors. In his last position in the Company, Dr. Hablani was a Technical Fellow. His extensive contributions over the years are documented in thirty-five papers mostly in the AIAA Journal of Guidance, Control, and Dynamics. During the years 2000-2005, he developed a course on Guidance, Navigation and Control of Spacecraft and Strategic Interceptors, and presented it Boeing wide. Dr. Hablani was an Associate Editor of the AIAA Journal of Guidance, Control, and Dynamics for twelve years (1999-2011). He is an Associate Fellow of AIAA since 1994. He was also an Associate Editor of the IEEE Trans. on Aerospace and Electronics Systems for two years. He is a recipient of the Leonardo da Vinci (the Spirit of the Renaissance) Engineer of the Year 1991 Award of the Rockwell International Company. During 1980-82, Dr. Hablani was a National Research Council Resident Associate at NASA Johnson Space Center, Houston, Texas. Dr. Hablani is a Distinguished Alumnus of the Department of Aerospace Engineering, Indian Institute of Science, Bengaluru, India. He earned his Ph.D. degree in 1978 and an M.Tech degree in 1974, both from Aerospace Engineering, IISc, Bangalore. Dr. Hablani earned his B.E. (Mechanical) degree from Government College of Engineering and Technology, Raipur, in 1972.

Abstract : In this talk the occurrence of unstable systems along with the reported transfer function models will be reviewed. The methods of designing PID controllers for SISO systems by synthesis method, IMC method, optimization method, equating coefficient method will be discussed. Design of multi-variable PID controllers for MIMO unstable systems will be provided with suitable examples. The methods of identifying appropriate transfer function models by the closed loop method for SISO and MIMO systems will be reviewed.

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Abstract : The problem of the power management of an hydrogen Fuel Cell (FC) system will be presented. Firstly a non-exhautif background will be given. Then a controller based on singular perturbation approach will be developed to respect the slower FC dynamics, control of the storage device (SCs) state of charge and the power response with a DC bus regulation of the electrical vehicle. Finally some experimental results will be presented.

Biography: Malek GHANES received the M.S. degree and Ph.D. in applied automatic and informatics both from IRCCyN, Ecole Centrale Nantes, in 2002 and 2005, respectively. From sept. 2005 to sept. 2006, he was a Postdoctoral position at GReyC. Since sept. 2006 and nov. 2008 he is Associate Professor and Head of Automatic Department, respectively, at ENSEA, France. In nov. 2012, he obtained his Accreditation to Supervise Research (HDR) and qualified as a full Professor. His research interests include observation and control of nonlinear system, with applications to electric and chaotic systems.

Abstract : Repetitive tasks / processes having finite (but variable) duration offer interesting opportunities for application of learning theory related concepts. Typical applications of such processes are in a variety of domains including pharma batch manufacturing, biomedical engineering & robotics. For control of such processes, iterative learning control has been applied very successfully. However, the target trajectories for such applications need to be established in an optimal manner using information from dynamic cause-effect relationships. Often times, such information is not easily available and the parameters as well as the structural relationships need to be learnt online, based on which the target trajectories can be re-specified for the next run of the repetitive process. This learning call for an integration of the iterative learning control along with estimation theory. This talk will present some of the issues involved at a tutorial level. Representative applications from batch pharma manufacturing & biomedical applications (glucose regulation in diabetics) would be presented to illustrate the potential of the integration.

Biography: Dr. Ravindra D. Gudi is a Professor at Department of Chemical Engineering, Indian Institute of Technology, Bombay. He holds a PhD from the University of Alberta (1995). His research interests lie broadly in process systems engineering, i.e. modeling, optimization, control and fault diagnosis of process systems. Dr. Gudi has served as a Visiting Professor at the Department of Chemical Engineering, University of Alberta, Canada (1997), Department of Chemical Engineering, University of Wisconsin- Madison (2003-04). Dr. Gudi has published over 60 Journal papers in peer-reviewed journals and has 7 US patents to his credit, in various areas of process systems engineering. Dr. Gudi is a recipient of several awards including the Canadian Commonwealth Fellowship by the Government of Canada (1991-1995), Lovraj Kumar Memorial Award for promotion of Industry Academia Interaction, (July 1998 - January 1999) Manudhane Applied Research Award (2006), Herdillia Award for Excellence in Basic Chemical Engineering (2009). He is also an Associate Editor of the IFAC journal of Process Control and Guest Editor for Control Engineering Practice. He serves on several technical committees of IFAC. He has also been an active consultant to the industry in India and abroad.

Abstract : Owing to the awareness of the implications of increased emissions from conventional fossil fuel based generation there is renewed focus on renewable energy based generation technologies. Solar Photo Voltaic (PV) system is one of the important renewable energy sources, relevant particularly in a tropical country like India. Operation of PV systems under grid connected is a matter of great research and commercial interest. Key issues include the power quality and harmonic injection during grid connected operation, and its detrimental effect on power system. Similarly, the voltage fluctuation due to change in insolation and temperature is a matter of concern, as it can lead to dynamic instability. Therefore, there is a need for having individual controllers for the PV based systems, and associated subsystems. There is also need to coordinate these controllers in tandem, so that individual subsystems can be integrated to yield a stable and optimal performance. The lecture will deliberate on the design and development of the control loop to achieve the decoupled control of real and reactive power feeding to the grid. It will also highlight the major differences in the control strategy of a roof top PV system and utility scale PV system. It will highlight the usefulness of d-q transformation in the control of inverter interfaced renewable energy sources. Finally, some strategy to tune the gains of the controller will be presented.

Biography: S Mishra (M’97-SM’04) received the B.E. degree from University College of Engineering, Burla, Orissa, India, and the M.E. and Ph.D. degrees from Regional Engineering College, Rourkela, Orissa, India, in 1990, 1992, and 2000, respectively. In 1992, he joined the Department of Electrical Engineering, University College of Engineering Burla as a Lecturer, and subsequently became a Reader in 2001. Presently, he is a Professor with the Department of Electrical Engineering, Indian Institute of Technology Delhi, India. Dr. Mishra has been honored with many prestigious awards such as the INSA Young Scientist Medal in 2002, the INAE Young Engineer Award in 2002, and recognition as the DST Young Scientist in 2001 to 2002, the INAE Silver Jubilee Young Engineer Award, etc. He is a Fellow of Indian National Academy of Engineering, Institute of Engineering and Technology London and Institute of Electronics and Telecommunication Engineering. His interests are in power system control, power quality and renewable energy. H has more than 20 IEEE Transactions papers to his credit.

Abstract : The speaker shall present the concept of an Oracle for Users of Industrial Machines and Systems and demonstrate the same for a few industrial examples. The prospects and technical challenges in developing the technology shall also be discussed through these examples.

Biography: Siddhartha Mukhopadhyay received his B.Tech. (Hons.), M.Tech. and Ph.D, all from IIT Kharagpur, in 1985, 1987 and 1991 respectively. He joined the Department of Electrical Engineering, I.I.T Kharagpur in 1990. Currently he is a Professor in the Department of Electrical Engg. and the Steel Technology Centre as well as the Dean of Alumni Affairs and International Relations. He was the Professor-In-Charge of the Centre for Railway Research (CRR: http://www.crr.iitkgp.ernet.in/crr/) at IIT Kharagpur. His current research interests are in CAD and Verification of AMS circuits, Integrated Vehicle Health Management, Tracking and Guidance and Cyber-Physical Systems. He has co-authored about 190 technical papers in national and international journals and conferences, a textbook on Industrial Instrumentation, Control and Automation an Edited Volume entitled “Measurement and Instrumentation: Trends and Applications”. He has also recorded about 70 hrs of video lectures under NPTEL and also a web-course on “Industrial Automation and Control”. He has executed several consulting and research projects in the above areas sponsored by government research funding agencies, such as DRDO, ISRO, DIT, Ministry of Power and industry including SAIL, General Motors, General Electric, Freescale Semiconductor, Synopsys Corporation and Texas Instruments. He serves on Review Committees at DRDO labs. He has received the Young Engineers’ Award in 1999 from the Indian National Academy of Engineering, the Young Scientist Medal in 1996 from the Indian National Science Academy and the UGC Young Teachers’ Career Award in 1993. For more details one may refer to:http://www.facweb.iitkgp.ernet.in/~smukh/

Abstract : Several events of blackouts in recent past, worldwide, have necessitated the use of more intelligent and automated systems for online monitoring, protection and control of the power systems. Wide Area Monitoring, and Control (WAMC) system, employing synchrophasor technology, is being increasingly used in power system networks, which forms an important part of the smart transmission grid. This employs Phasor Measurement Units (PMUs), which provide synchronized and time stamped voltage current phasors in real time. These measurements have better observability of the inter-area oscillations than the local signal can be effectively utilized to design a centralized Wide Area Damping Controllers (WADC).
This talk will discuss the development of a robust wide-area signal based centralized Takagi-Sugeno (TS) fuzzy controller to improve the angular stability of a multi-machine power system. To develop such controllers, it is important to choose the most appropriate control input signals to achieve the best performance of the WADC. A systematic procedure has been proposed to select suitable wide-area input/output control signals based on signal coherency approach. A Networked Wide-Area Control System (NWACS) is associated with the time delays in the network communication, which can create a phase lag and deteriorate the control performance. The resulting latency may vary from hundreds of milliseconds to seconds due to PMU data processing, buffering, demultiplexing/multiplexing, synchronization, forwarding, and routing etc. in the communication network. Also, if the communication link, used for the wide-area signal transmission, is unreliable, it is often subjected to fading and congestion, leading to packet drop and packet disorder error in the network. An approach has been further suggested to compensate for the network latency in the application of synchrophasor assisted wide area control. The power oscillation modes are estimated online in presence of packet drop in a communication network. The modes are monitored through a Modified Extended Kalman Filter (MEKF) approach. The performance of the proposed delay compensation scheme and the WADC for a FACTS controller has been tested on a practical power system network.

Biography: S.C. Srivastava received B.Tech degree in Electrical Engineering from Institute of Technology, Banaras Hindu University India in 1976 and Ph.D. from Indian Institute of Technology (IIT) Delhi in 1987. He worked at Engineers India Limited New Delhi, a consultancy organization, during Nov.1976 - Nov.1988 in its Project Engineering and Engineering Technology Development divisions. Since November 1988, he is a faculty member in the Department of Electrical Engineering at IIT Kanpur, where he became ‘Professor’ in Dec. 1995. He also served as Head of Electrical Engineering Department during Jan. 2000 to Dec. 2002, Dean of Research and Development during Jan. 2005 to Jan. 2008 and ,at present serving as Deputy Director at IIT Kanpur. He has also been ‘Visiting Research Professor’ in the ECE Department at Mississippi State University, USA and a Faculty member at Asian Institute of Technology, Bangkok, Thailand. He also held ‘P.K. Kelkar Chair Professor’ position at IIT Kanpur. He has supervised 20 Ph.D. and 57 Masters theses in the power systems area and published about 240 papers in refereed journals and conference proceedings. His research interests include Power System Stability and Security Analysis, Synchrophasor Applications, Power System Restructuring and DC Microgrid. He is Fellow of the Indian National Academy of Engineering (INAE), Institution of Engineers (India) & IETE (India), and Senior member IEEE.

Abstract : Fractional order calculus is more than three hundred years old. But its study, till recently, was restricted among mathematicians only. It was only few decades’ back when physicists and engineers became interested on its applications after existence of fractional order behaviour in some physical systems came into light. This led to further studies and characterizations on infinite transmission lines, visco-elastic element, porous structures, fractional order capacitance (fractance) etc. It was further observed that few types of fractional order controllers provide better performance compared to conventional integer order controllers. All these opened up a new area of research: fractional order control systems. Interesting papers started pouring in literature where attempts were made to extend the existing control theory towards fractional order systems. Extensive studies were carried out on design and realization of fractional PID controllers and their robustness improvement. However, extension of classical control theory to fractional order control is not straightforward and few fundamental issues need to be addressed before these problems can be tackled effectively. Some of these roadblocks are on finding out the closed loop solution of fractional optimal control problems, pseudo-state space realization of noncommensurate type fractional order systems and their controllability and observability, consideration of the initialization function (or past history) in the design of fractional order control systems, etc. Effective methods to tackle these issues may bring in interesting applications of fractional order control systems in future.

Biography: Siddhartha Sen received B.E.E. degree from Jadavpur University, Kolkata in 1977; M.Tech and Ph.D degrees from Indian Institute of Technology, Kharagpur in 1980 and 1992 respectively. He served Damodar Valley Corporation and Regional Institute of Technology, Jamshedpur prior to joining Indian Institute of Technology, Kharagpur as a Lecturer, in 1984. He is presently a Professor and the Head of the Department, Electrical Engineering at Indian Institute of Technology, Kharagpur. He has edited/authored two books, and authored more than one hundred papers in peer reviewed journals and conferences in the areas of Instrumentation and Control. His current research interests include capacitive sensors, MEMS accelerometers, fractional order devices, circuits and systems, control allocation and robust control.

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