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10th IFAC Symposium on Dynamics and control of Process systems, DYCOPS 2013

作者： Jeyasenthil, R. Nataraj, P.S.V. Systems and Control Engineering Group IIT Bombay India

ISBN: (纸本)9783902823595

This paper proposes an efficient algorithm for automatic loop shaping in Quantitative Feedback Theory(QFT). The proposed method uses hybrid optimization and consistency techniques. Hull consistency is used to prune the input domain by removing the inconsistent values which are not a part of the solution. The hybrid optimization part combines interval global optimization and nonlinear local optimization methods. The proposed method is demonstrated on uncertain DC motor plant model and performance is compared with those of existing interval methods. © IFAC.

关键词： Robust control

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Periodic output feedback control for Delta operator systems

Periodic output feedback control for Delta operator systems

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2013 International Conference on control Communication and Computing, ICCC 2013

作者： Bandyopadhyay, B. Lal Priya, P.S. Systems and Control Engineering IIT Bombay Mumbai 400076 India

ISBN: (纸本)9781479905751

This paper proposes an algorithm for periodic output feedback (POF) control for Delta operator systems. The Delta operator creates the rapprochement between analog and discrete dynamic system models and establishes the natural framework to investigate the behavior of discrete dynamic models with fast sampling rates. It is shown here that, the periodic output feedback control fails for discrete-time systems represented by the traditional shift operator for smaller values of sampling time, whereas the same is possible if it is represented in the delta domain. Since the proposed algorithm is based on output feedback, it is more practical in comparison to the state feedback based control algorithms. The design method is illustrated through a numerical example and the simulation results show the effectiveness of the proposed method. © 2013 IEEE.

关键词： State feedback

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Guidance of an autonomous agent for coverage applications using range only measurement

Guidance of an autonomous agent for coverage applications us...

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AIAA Guidance, Navigation, and control (GNC) Conference

作者： Tripathy, Twinkle Sinha, Arpita Department of Systems and Control Engineering IIT Bombay Mumbai Maharashtra 400076 India

ISBN: (数字)9781624102240

ISBN: (纸本)9781624102240

This paper addresses the problem of guiding an autonomous agent to cover a region surrounding a target. It is assumed that only range information is available to the agent. The target point is considered to be stationary. The region of interest can be changed by changing the initial conditions or the system parameters. In this work, we analyse the effect of the initial conditions only. We propose a simple control law which can be easily implemented. The analytical results obtained here are validated through simulation. The autonomous agent could be a ground or an aerial vehicle depending on the application. For surveillance applications, the target can be a landmark, where the agent can monitor the region surrounding the landmark. Other applications can be sprinkling fertilizers, watering a farm, etc. where a pre-defined area needs to be covered.

关键词： Autonomous agents

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Periodic Output Feedback based Discrete-Time Sliding Mode control of Uncertain Linear systems with Input Delay

Periodic Output Feedback based Discrete-Time Sliding Mode Co...

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International Multi-Conference on Automation, Computing, Communication, control and Compressed Sensing

作者： P. S. Lal Priya B. Bandyopadhyay IDP in Systems and Control Engineering IIT Bombay Mumbai India

ISBN: (纸本)9781467350891

This paper proposes a novel control algorithm for linear discrete time uncertain input delay systems using infrequent output observations i.e, periodic output feedback technique. First, the uncertain delayed system, with a constant delay and bounded uncertainty is converted to an equivalent delay free system using a predictor. It has been shown that, when the output of the uncertain predicted system is sampled slower than the input, there exists a discrete-time quasi sliding mode. Since the proposed algorithm is based on output feedback, it is more practical in comparison to state feedback based control algorithms. The simulation results demonstrate the efficacy of the proposed algorithm.

关键词： Discrete-time sliding mode control(DSMC) Periodic output feedback(POF) Multirate Output Feedback(MROF) Input Delay

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Integral sliding mode control for GMAW systems

Integral sliding mode control for GMAW systems

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10th IFAC Symposium on Dynamics and control of Process systems, DYCOPS 2013

作者： Bera, Manas Kr. Bandyopadhyay, B. Paul, A.K. IDP in Systems and Control Engineering Indian Institute of Technology Bombay Mumbai India Fiona 1602 Hiranandani Thane India

ISBN: (纸本)9783902823595

Gas metal arc welding (GMAW) process is one of the most popular manufacturing processes in industries such as automotive, aerospace, ship buildings, and boiler. To increase the consistency in welding quality, the automation of the welding process with feedback controllers is inevitable. This paper presents an Integral Sliding Mode (ISM) controller, a robust controller, to control the welding current and arc voltage of a GMAW system. The concept of ISM controller design technique is to combine a discontinuous control with a nominal control to achieve robustness against matched perturbations. The proportional plus integral (PI) and composite nonlinear feedback (CNF) controllers are used as nominal controllers. It is shown in the paper that the CNF controller performs better than PI controller. A linear multi input multi output (MIMO) system model has been considered here for the design. The performance of the controller is analyzed in the presence of model parameter uncertainties and external disturbances and the simulation results are presented and discussed in order to establish a comparison framework. © IFAC.

关键词： Disturbance rejection

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Automatic Loop Shaping in QFT using Hybrid Optimization and Consistency Technique

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IFAC Proceedings Volumes 2013年第32期46卷 427-432页

作者： R. Jeyasenthil P.S.V. Nataraj Systems and Control Engineering Group IIT Bombay India (Tel: +91-22-25764884 Systems and Control Engineering Group IIT Bombay India (Tel: +91-22-25767887

关键词： Interval consistency technique Quantitative feedback theory global optimization robust control

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Periodic output feedback control for Delta operator systems

Periodic output feedback control for Delta operator systems

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International Conference on control Communication & Computing India (ICCC)

作者： B. Bandyopadhyay P. S. Lal Priya IIT Bombay Systems and Control Engineering Mumbai

关键词： Output feedback Optical fibers Eigenvalues and eigenfunctions Discrete-time systems State feedback Closed loop systems

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Discrete-time flow control for connection-oriented communication network via reduced model

Discrete-time flow control for connection-oriented communica...

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IEEE International Conference on Industrial Informatics (INDIN)

作者： P Baburaj B Bandyopadhyay IDP in Systems & Control Engineering Indian Institute of Technology Bombay Mumbai India

In this paper, a suboptimal flow controller design for connection-oriented communication network via reduced model is proposed. Network is modeled as an n th order discrete system whose available bandwidth variations at the bottlenecked link act as an exogenous unmatched disturbance. The proposed scheme is characterized by a simple first order design which is applied to n th order systems through aggregation. Effect of bandwidth variation at the congested node which is modeled as a disturbance, is well accounted in controller design with widely adopted delay-based disturbance estimation. Performance of the proposed scheme is validated through Matlab and ns simulations. Simulation results shows that all the proposed reduced order control scheme tracks the desired queue length effectively under the adverse influence of unmatched disturbances.

关键词： Bandwidth Mathematical model State feedback Queueing analysis MATLAB Delays Computational modeling

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Integral Sliding Mode control for GMAW systems

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IFAC Proceedings Volumes 2013年第32期46卷 337-342页

作者： Manas Kr Bera B. Bandyopadhyay A.K. Paul IDP in Systems and Control Engineering Indian Institute of Technology Bombay Mumbai India Fiona 1602 Hiranandani Thane India

关键词： Robust control Discontinuous control Disturbance rejection Proportional plus Integral control

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Sliding mode control for slosh-free motion using a nonlinear sliding surface

Sliding mode control for slosh-free motion using a nonlinear...

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作者： Kurode, Shailaja Spurgeon, Sarah K. Bandyopadhyay, Bijnan Gandhi, P.S. Department of Electrical Engineering College of Engineering Pune 411005 India School of Engineering and Digital Arts University of Kent Canterbury CT2 7NZ United Kingdom IDP in Systems and Control Engineering Indian Institute of Technology Bombay Mumbai 400076 India Department of Mechanical Engineering Indian Institute of Technology Bombay Mumbai 400076 India

A new nonlinear switching surface is proposed for the design of a sliding mode controller for a class of mismatched uncertain systems. 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 fundamental mode of lateral slosh is considered. A simple pendulum model is used to represent the lateral slosh. Given the difficulty of measuring the slosh states directly, a sliding mode observer is used for implementation of the resulting sliding mode control. The effectiveness of the theoretical developments is demonstrated via both simulation and experimental results. © 2012 IEEE.

关键词： Sliding mode control

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