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IEEE International Symposium on Industrial Electronics (ISIE)

作者： S. Kamal Arun Raman B. Bandyopadhyay IDP in Systems and Control Engineering Indian Institute of Technology Bombay India

ISBN: (纸本)9781467301596

In this paper, a methodology for stabilization of fractional discrete-time system based on discrete sliding mode approach is attempted for the first time. The proposed controller is robust in the presence of matched uncertainties. Stability during sliding is analyzed in terms of gamma function based radius using the property introduced by Hilfer [8]. Numerical example along with simulation is presented to illustrate the efficacy of the proposed method.

关键词： Uncertainty Sliding mode control Switches Stability analysis Robustness Trajectory

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Discrete-time integral sliding-mode flow control for connection-oriented communication networks

Discrete-time integral sliding-mode flow control for connect...

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International Conference on control, Automation, Robotics and Vision (ICARCV)

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

In this paper, a novel discrete-time integral sliding-mode control (DISMC) scheme for connection-oriented communication network 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 discrete-time integral sliding manifold which inherits the desired properties such as elimination of reaching phase, full order sliding manifold with pole assignment etc. In particular, comparing with the existing discrete flow control scheme, the new scheme ensures more precise tracking with O(T 2 ) steady-state error for state regulation with widely adopted delay-based disturbance estimation. Surface parameters are so chosen to minimise the effect of unmatched uncertainty. Simulation results shows that discrete-time ISMC achieves more effective control performance under the adverse influence of unmatched disturbances, meanwhile eliminating the reaching phase.

关键词： Bandwidth Uncertainty Manifolds Delays Mathematical model Estimation Propagation delay

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Singularity Avoidance in Single Gimbal CMG Using the Theory of Potential Functions

Singularity Avoidance in Single Gimbal CMG Using the Theory ...

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World Congress on Intelligent control and Automation

作者： Jhelum Chakravorty Systems and Control Engineering Dept. IIT-Bombay

ISBN: (纸本)9781467313971

The control moment gyro (CMG) actuators used in attitude control of spacecraft suffer from the singularity problem where they fail to generate the output torque in some particular direction called the singular direction. In connection to the avoidance of the singularity, the notion of the potential function is discussed and shown to behave as an avoidance potential. Using the theory of the superquadric isopotential contours around the singular point, a suitable algorithm is developed to avoid a small region enclosing the singular point. The isopotential contour, where the avoidance potential exceeds some pre-fixed value can be avoided. The stability of the CMG system using the potential function is discussed. Simulation is run to show the gimbal angle and output torque profiles. Comparative studies using PID and PD controllers are done.

关键词： Singularity Superquadratic Isopotential contour Avoidance potential

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Development And Analysis Of The Zero Power Fractional-Order Transfer Function Model For A Nuclear Reactor With Slab Geometry

Development And Analysis Of The Zero Power Fractional-Order ...

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第五届国际自动控制联合会分数阶导数及其应用会议

作者： Vishwesh A.Vyawahare P.S.V.Nataraj IDP in Systems and Control Engineering Indian Institute ofTechnology Bombay Powai Mumbai INDIA 400 076 IDP in Systems and Control Engineering Indian Institute of Technology Bombay Powai Mumbai INDIA 400 076

In this paper,development of the Fractional-order(FO)linear model of the neutron transport in a nuclear reactor is *** general,this linear model is commonly known in the reactor theory as the Zero Power Transfer Funct... 详细信息

关键词： Development And Analysis Of The Zero Power Fractional-Order Transfer Function Model For A Nuclear Reactor With Slab Geometry Model Reactor

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Development And Analysis Of The Fractional-Order Point Reactor Kinetics Model For A Nuclear Reactor With Slab Geometry

Development And Analysis Of The Fractional-Order Point React...

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第五届国际自动控制联合会分数阶导数及其应用会议

This paper presents the development of Fractional-order(FO) Point Reactor Kinetics(FPRK) model for anuclear reactor with slab *** PRK model is the first step towards the development of the 'control' model for a *** is a set of nonlinear,coupled dynamical ordinary differential equations characterizing the time evolution of the neutron flux.

关键词： Reactor Development And Analysis Of The Fractional-Order Point Reactor Kinetics Model For A Nuclear Reactor With Slab Geometry Model

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Periodic Output Feedback based Discrete-Time Sliding Mode control for Multivariable systems

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

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IEEE Interantional Conference on Industrial Technology

作者： P. S. Lal Priya B. Bandyopadhyay Faculty of IDP in Systems and Control Engineering IIT Bombay Mumbai 400076

ISBN: (纸本)9781467303408;9781467303422

This paper proposes a new algorithm for achieving discrete-time sliding mode for linear multivariable nominal systems using output feedback. The concept of periodic output feedback is used here. It has been shown that, when the output of the system is sampled slower than the input, there exist a discrete-time sliding mode. The method is very general and is applicable to any controllable and observable linear time invariant square system. The magnetic tape position control application is presented to illustrate the proposed method.

关键词： Discrete-time sliding mode control(DSMC) Periodic output feedback(POF)

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Explicit-Model Predictive control: A simulation based scalability study

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IFAC Proceedings Volumes 2012年第15期45卷 204-209页

作者： Arun Gupta Sharad Bhartiya P.S.V. Nataraj ABB-GISL Research Bangalore India 560048 (Tel: +91-***) Department of Chemical Engineering IIT Bombay Mumbai India (Tel: +91-22-25767225) Systems and Control Engineering IIT Bombay Mumbai India (Tel: +91-22-25767887)

The main impediment in the applicability of explicit model predictive control (e-MPC) is that the number of regions in the parametric space increases dramatically with an increase in the dimension of the parameter and decision spaces as well as with an increase in the number of constraints. This work explores the scalability issues by simulation in which e-MPC is used for control of quadruple tank system. Explicit-MPC problem formulation from a standard MPC (for finite and infinite prediction horizon) using multi parametric quadratic programming (mp-QP) is presented. The results confirm that while the number of critical regions increases exponentially with the control horizon, the online calculations are computationally inexpensive.

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Robust control of rotary slosh using integral sliding modes

Robust control of rotary slosh using integral sliding modes

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International Workshop on Variable Structure systems, VSS

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

This paper investigates a problem of control of rotary slosh using integral sliding modes (ISM). Slosh coupled with vehicle dynamics represents a class of systems having coupled nonlinear and underactuated dynamics. Rotary slosh is modeled using spherical pendulum. The coordinates are chosen to avoid the singularity at equilibrium point. A stabilizing control is designed using Lyapunov approach. A stabilizing controller (SC) is made robust by adding ISM component. The integral sliding mode control (ISMC) yields robust performance over the entire state space. The effectiveness of the method is validated in simulations.

关键词： Containers Robustness Mathematical model Equations Vehicle dynamics Aerospace electronics Vehicles

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Discrete-time sliding mode control using infrequent output measurements

Discrete-time sliding mode control using infrequent output m...

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2011 International Conference on Advanced Mechatronic systems, ICAMechS 2011

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

ISBN: (纸本)9780955529375

This paper presents a new algorithm for discrete-time sliding mode control using output feedback. It has been shown that, when the output of the system is sampled slower than the input, a discrete-time sliding mode can be obtained. The method is very general and is applicable to any controllable and observable linear time-invariant single input single output system. The proposed technique is illustrated with a numerical example. © 2011 Intl Journal of Adv Mechatr.

关键词： Numerical methods

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A Reliable and Accurate Calculation of Excitation Capacitance Value for an Induction Generator Based on Interval Computation Technique

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International Journal of Automation and computing 2011年第4期8卷 429-436页

作者： Rajesh Kumar Thakur Vivek Agarwal Paluri S. V. Nataraj Systems and Control Engineering Interdisciplinary Programme (IDP)Mumbai 400076 India Department of Electrical Engineering IIT-Bombay Powai Mumbai 400076 India

A squirrel cage induction generator （SCIG） offers many advantages for wind energy conversion systems but suffers from poor voltage regulation under varying operating conditions. The value of excitation capacitance （C exct ） is very crucial for the selfexcitation and voltage build-up as well as voltage regulation in SCIG. Precise calculation of the value of C exct is, therefore, of considerable practical importance. Most of the existing calculation methods make use of the steady-state model of the SCIG in conjunction with some numerical iterative method to determine the minimum value of C exct . But this results in over estimation, leading to poor transient dynamics. This paper presents a novel method, which can precisely calculate the value of C exct by taking into account the behavior of the magnetizing inductance during saturation. Interval analysis has been used to solve the equations. In the proposed method, a range of magnetizing inductance values in the saturation region are included in the calculation of C exct , required for the self-excitation of a 3-φ induction generator. Mathematical analysis to derive the basic equation and application of interval method is presented. The method also yields the magnetizing inductance value in the saturation region which corresponds to an optimum C exct（min） value. The proposed method is experimentally tested for a 1.1 kW induction generator and has shown improved results.

关键词： d-q model hull consistency induction generator interval analysis interval arithmetic optimization range of interval realpaver self-excitation transients.

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