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2010 11th International Workshop on Variable Structure systems, VSS 2010

作者： Parkhi, Prasad Bandyopadhyay, Bijnan Jha, Mahendra IDP in Systems and Control Engineering Indian Institute of Technology Bombay Powai Mumbai-400076 India Armament Research and Development Establishment Pune-411021 India

ISBN: (纸本)9781424458318

Sliding mode design based on Lyapunov matrices is proposed as roll autopilot for a tail controlled missile. The search of Lyapunov matrix for systems with unmatched uncertainties is formulated in terms of linear matrix inequality. The proposed scheme ensures robust roll position control even in the presence of large mismatched parametric uncertainties and external disturbances. The performance of roll autopilot design based on sliding mode technique is compared with the classical autopilot. The simulation results demonstrate that the sliding mode based roll autopilot maintains its performance over wide range of variation of parameters. © 2010 IEEE.

关键词： Linear matrix inequalities

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A nonlinear sliding surface for discrete-time uncertain systems

A nonlinear sliding surface for discrete-time uncertain syst...

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International Workshop on Variable Structure systems, VSS

作者： B. Bandyopadhyay Fulwani Deepak IDP in Systems and Control Engineering Indian Institute of Technology Bombay Mumbai India

This paper proposes a discretization behavior of nonlinear sliding surface based algorithms. Recently nonlinear surfaces are proposed by the authors to improve transient performance of continuous and discrete-time uncertain systems. The nonlinear surface changes system's closed loop damping ratio as output approaches the setpoint. In this paper we propose a nonlinear surface for the system represented by delta operator approach which unifies our continuous-time and discrete-time results.

关键词： Uncertain systems Damping Sliding mode control Sampling methods control systems Frequency Motion control Conferences Variable structure systems Cities and towns

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Application of the Bernstein form for reliable global optimization of mixed-integer problems in process synthesis and design

Application of the Bernstein form for reliable global optimi...

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International Conference on Reliability, Safety and Hazard (ICRESH)

作者： Bhagyesh V. Patil P. S. V. Nataraj S. Bhartiya IDP in Systems and Control Engineering IIT Bombay India Chemical Engineering Department IIT Bombay India

In this paper, we present a Bernstein polynomial approach to optimally and reliably solve polynomial class of mixed-integer programming (MIP) problems. We use the Bernstein form in the branch-and-bound framework to compute a global optimum of MIPs. We present two application examples of MIPs: optimal pump configuration problem and trim loss minimization, to demonstrate the Bernstein polynomial approach.

关键词： Silicon Chemicals

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Design of roll autopilot for a tail controlled missile using sliding mode technique

Design of roll autopilot for a tail controlled missile using...

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International Workshop on Variable Structure systems, VSS

作者： Prasad Parkhi Bijnan Bandyopadhyay Mahendra Jha Armament Research and Development Establishment Pune India IDP in Systems and Control Engineering Indian Institute of Technology Bombay Mumbai India

关键词： Tail Sliding mode control Missiles Uncertainty Linear matrix inequalities Robust control control systems Position control Riccati equations Robustness

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The design and Implementation of output feedback based frequency shaped sliding mode controller for the smart structure

The design and Implementation of output feedback based frequ...

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IEEE International Symposium on Industrial Electronics (ISIE)

作者： A. J. Mehta B. Bandyopadhyay Department of Electrical Engineering G H Patel College of Engineering and Technology Vallabh Vidhyanagar Gujarat India IDP in Systems and Control Engineering Indian Institute of Technology Bombay Mumbai India

In this paper, we introduce the design method for multirate output feedback based frequency shaped sliding mode control. A switching type reaching law has been used for the vibration suppression of the smart structure. The frequency shaping approach is used to suppress the vibratory modes of smart structure excited during the sliding mode.

关键词： Intelligent structures Output feedback Intelligent sensors Frequency control Mathematical model Uncertainty

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Robust control for slosh-free motion using sliding modes

Robust control for slosh-free motion using sliding modes

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Annual Conference of Industrial Electronics Society

作者： Shailaja Kurode B. Bandyopadhyay P. S. Gandhi Department of ELectrical Engineering COE Pune India IDP in Systems and Control Engineering Indian Institute of Technology Bombay Mumbai India Department of Mechanical Engineering Indian Institute of Technology Bombay Mumbai India

This paper presents a new approach for integral sliding mode controller for a class of unmatched uncertain systems. A nominal control is computed using sliding mode techniques which works for unmatched uncertain system. Integral sliding mode is further added to ensure robust reaching phase. A control system for slosh-free motion of a partially filled liquid container is sought. This is representative of a broader class of systems to which the proposed methodology is applicable. A simple pendulum model is considered to represent a fundamental mode of the lateral slosh. The effectiveness of the proposed scheme is demonstrated by simulation results.

关键词： Robustness Uncertainty Containers Aerospace electronics Uncertain systems Equations control systems

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The extrapolated taylor model

The extrapolated taylor model

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13th GAMM-IMACS International Symposium on Scientific Computing, Computer Arithmetic and Verified Numerical Computations, SCAN 2008

作者： Nataraj, P.S.V. Sondur, Shanta IDP in Systems and Control Engineering Indian Institute of Technology Bombay Mumbai India

The Taylor model [8] is one of the inclusion functions available to compute the range enclosures. It has the property of (m + 1)th convergence order, where, m is the order of the Taylor model used. It computes a high order polynomial approximation to a multivariate Taylor expansion, with a remainder term that rigorously bound the approximation error. The sharper bounds on the enclosures computed using the Taylor model can be obtained either by successively partitioning the domain x using suitable subdivision factors, or by increasing the convergence rate of the Taylor model using higher order Taylor models. However, higher order Taylor forms require higher degrees of the polynomial part, which in turn require more computational effort and more memory. This is the major drawback of increasing the order m of Taylor models for obtaining range enclosures with higher order convergence rates. In this paper, we attempt to overcome these drawbacks by using a lower order Taylor model, and then using extrapolation to accelerate the convergence process of the sequences generated with the lower order Taylor model. The effectiveness of all the proposed algorithms is tested on various multivariate examples and compared with the conventional methods. The test results show that the proposed extrapolation-based methods offer considerable speed improvements over the conventional methods.

关键词： Enclosures

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Discrete time output feedback sliding mode control algorithm for chattering reduction and elimination

Discrete time output feedback sliding mode control algorithm...

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IEEE 10th International Workshop on Variable Structure systems, VSS'08

作者： Bandyopadhyay, B. Thakar, V.K. IDP in Systems and Control Engineering ACRE Building IIT Bombay Mumbai- 400076 India EC Engineering Department A.D. Patel Institute of Technology New Vallabh Vidyanagar Gujarat India

ISBN: (纸本)9781424422005

This paper presents discrete time sliding mode control which uses multirate output feedback and power rate reaching law. The method proposed here uses only output samples and past control input for switching function evaluation and sliding mode control. The discrete time version of power rate reaching law has been obtained and then output samples based algorithm has been developed. It has been shown that it is possible to reduce chattering by suitably chosing the reaching law parameters. It has also been demonstrated that it is possible to avoid chattering completely for special case of controller parameters using only output *** simulation study carried out on numerical example reveals effectiveness of the proposed algorithm. ©2008 IEEE.

关键词： Sliding mode control

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A Robust Algorithm Against Actuator Saturation using Integral Sliding Mode and Composite Nonlinear Feedback

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IFAC Proceedings Volumes 2008年第2期41卷 14174-14179页

作者： B. Bandyopadhyay Fulwani Deepak Y.J. Park IDP in Systems and Control Engineering Indian Institute of Technology Bombay India (Tel: 091-22-25767889 IDP in Systems and Control Engineering Indian Institute of Technology Bombay India Department of Mechanical Engineering KAIST Taejon 305-701 South Korea

Integral sliding mode(ISM) based composite nonlinear feedback(CNF) tracking controller to track step signal is proposed. The proposed controller combines advantages of CNF controller like quick response without overshoot and robustness of ISM controller. Integral sliding mode is used along with CNF controller to reject disturbances and track nominal trajectory. Actuator saturation effect is considered and the stability of overall system is guaranteed with saturated actuator. Chattering is reduced by use of sigmoid function and non-linear switching gain. Effectiveness of the proposed scheme is demonstrated by simulation results.

关键词： Robust control Anti-windup Tracking

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Discrete time output feedback sliding mode control algorithm for chattering reduction and elimination

Discrete time output feedback sliding mode control algorithm...

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International Workshop on Variable Structure systems, VSS

作者： B. Bandyopadhyay V. K. Thakar IDP in Systems and Control Engineering IIT Bombay Mumbai India EC Engineering Department A. D. Patel Institute of Technology Gujarat India

This paper presents discrete time sliding mode control which uses multirate output feedback and power rate reaching law. The method proposed here uses only output samples and past control input for switching function evaluation and sliding mode control. The discrete time version of power rate reaching law has been obtained and then output samples based algorithm has been developed. It has been shown that it is possible to reduce chattering by suitably choosing the reaching law parameters. It has also been demonstrated that it is possible to avoid chattering completely for special case of controller parameters using only output *** simulation study carried out on numerical example reveals effectiveness of the proposed algorithm.

关键词： Output feedback Sliding mode control Variable structure systems control systems Delay Linear approximation Piecewise linear approximation control engineering Power engineering and energy Robust control

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