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2012 IEEE International Conference on Industrial Technology, ICIT 2012

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

ISBN: (纸本)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. © 2012 IEEE.

关键词： Magnetic tape

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Sliding surface design with saturated actuator

Sliding surface design with saturated actuator

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2012 12th International Workshop on Variable Structure systems, VSS 2012

作者： Fulwani, Deepak Bandyopadhyay, B. Faculty of Electrical Engineering IIT Rajasthan Jodhpur India IDP in Systems and Control Engineering IIT Bombay India

ISBN: (纸本)9781457720666

A class of nonlinear uncertain systems with saturated actuator is considered in this paper. Sliding surface matrix is obtained using parameterized Riccatti equation. The proposed surface ensures that control limits are respected in a region of state space. This region can be made sufficiently large by choosing appropriate value of design parameters. © 2012 IEEE.

关键词： Actuators

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Design of Robust QFT controllers and Prefilters for 3x3 Distillation Column

Design of Robust QFT Controllers and Prefilters for 3x3 Dist...

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Annual IEEE India Conference

作者： Mukesh D. Patil P. S. V. Nataraj Department of Electronics Engineering Ramrao Adik Institute of Technology Nerul Navi Mumbai India 400706 IDP in Systems and Control Engineering Indian Institute of Technology Bombay Mumbai India 400 076

ISBN: (纸本)9781479922765

Design of robust controller for multivariable systems is very challenging and their automation is a key concern in control system design. In this paper, a fixed structure multivariable Quantitative Feedback Theory (QFT) controller has been synthesized by solving QFT quadratic inequalities of robust stability and tracking specifications. The quadratic inequalities (constraints) are posed as Interval Constraint Satisfaction Problem (ICSP). The constraints are solved by constraint solver - RealPaver. The synthesis problem consists of obtaining a controller that ensures stability and meets a given set of performance specifications, in spite of disturbance and model uncertainties. In addition to perform the above tasks, a MIMO controller also has to perform the difficult task of minimizing interaction between the various control loops. In QFT, the prefilter is designed to achieve the desired tracking specifications. The synthesis of prefilter in QFT is usually carried out manually, and largely depends on the designer's skill and experience. Thus, a good design is not always assured by the manual design process. Thus, it is necessary to have methodology for automated synthesis of prefilter for multivariable systems. In the design method, we pose the prefilter design problem as an ICSP and solve it using the well-established constraint solver. To validate the above design approach, the designed controllers and prefilters are simulated on 3x3 distillation column system.

关键词： QFT ICSP tracking specifications

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Robust Nonlinear control of GMAW systems-A Higher Order Sliding Mode Approach

Robust Nonlinear Control of GMAW Systems-A Higher Order Slid...

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IEEE International Conference on Industrial Technology

作者： Manas Kr. Bera B. Bandyopadhyay A. K. Paul Systems and Control Engineering IIT Bombay Mumbai 400076 Fiona 1602 Hiranandani Thane 400607

ISBN: (纸本)9781467345675

This paper presents the control of a gas metal arc welding (GMAW) system using one of the higher order sliding mode control algorithms, the super twisting controller, which is a continuous control and a superior control with its extreme robustness property. A nonlinear multi input multi output (MIMO) system model has been considered here for the design of the super-twisting controllers. The control inputs chosen are, the open circuit voltage and the wire feed speed which are used to control the current and arc length of the system. The performance analysis of the controllers are studied in the presence of wide variations of model parameter uncertainties. The simulation results are presented to illustrate the efficiency of the controller used.

关键词： Welding Process control Mathematical model Electrodes control systems Metals Heat transfer

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GNURadio, Scilab, Xcos and COMEDI for data acquisition and control: An open source alternative to labVIEW

GNURadio, Scilab, Xcos and COMEDI for data acquisition and c...

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8th International Symposium on Advanced control of Chemical Processes, ADCHEM 2012

作者： Patil, Jagdish Y. Dubey, Balashish Moudgalya, Kannan M. Peter, Rakesh Department of Systems and Control Engineering IIT Bombay Mumbai 400076 India Department of Chemical Engineering IIT Bombay Mumbai 400076 India Department of Chemical Engineering and Systems and Control Engineering IIT Bombay Mumbai 400076 India Dept. of Computer Science Amrita University Coimbatore India

ISBN: (纸本)9783902823052

This article describes an attempt to create an open source equivalent to the data acquisition and control software LabVIEW. The proposed solution uses GNURadio, OpenCV, Scilab, Xcos and COMEDI on Linux. GNURadio gives a convenient graphical front end. The computations can be carried out using OpenCV or Scilab and Xcos. The device drivers given in COMEDI are used to access real time data. We also present PyGTK based improved graphical user interface for GNURadio. © 2012 IFAC.

关键词： Graphical user interfaces

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Explicit-model predictive control: A simulation based scalability study

Explicit-model predictive control: A simulation based scalab...

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8th International Symposium on Advanced control of Chemical Processes, ADCHEM 2012

作者： Gupta, Arun Bhartiya, Sharad Nataraj, P.S.V. ABB-GISL Research Bangalore 560048 India Department of Chemical Engineering IIT Bombay Mumbai India Department of Systems and Control Engineering IIT Bombay Mumbai India

ISBN: (纸本)9783902823052

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. © 2012 IFAC.

关键词： Scalability

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A 2D-Planar Dielectrophoretic Model

A 2D-Planar Dielectrophoretic Model

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American control Conference

作者： H. Simha R. N. Banavar Systems and Control Engineering IIT Bombay Faculty of Systems and Control Engineering IIT Bombay

ISBN: (纸本)9781457710957

Dielectrophoresis (DEP) is an electrokinetics-based phenomenon that involves the motion of a particle due to the interaction between an applied nonuniform electric field and an induced dipole moment. This technique is very effective in particle manipulation and separation. Earlier studies on control-amenable models to describe the motion of a neutrally buoyant, neutrally charged particle in a chamber with a parallel electrode array have restricted the motion of the particle to one-dimension. Here, incorporating the electro-thermal fluid motion as well, we present a 2D-planar DEP model.

关键词： Force Equations Electrodes Mathematical model Dielectrophoresis Charge carrier processes Permittivity

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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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2012 12th International Workshop on Variable Structure systems, VSS 2012

作者： Thakar, Parth S. Bandyopadhyay, B. Gandhi, P.S. Kurode, Shailaja 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 Department of Electrical Engineering COE Pune 400005 India

ISBN: (纸本)9781457720666

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. © 2012 IEEE.

关键词： Robust control

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GNURadio, Scilab, Xcos and COMEDI for Data Acquisition and control: An Open Source Alternative to LabVIEW *

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IFAC Proceedings Volumes 2012年第15期45卷 626-631页

作者： Jagdish Y. Patil Balashish Dubey Kannan M. Moudgalya Rakesh Peter Systems & Control Engineering IIT Bombay Mumbai 400076 Chemical Engineering IIT Bombay Mumbai 400076 Chemical Engineering and Systems & Control Engineering IIT Bombay Mumbai 400076 Dept. of Computer Science Amrita University Coimbatore

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Sliding surface design with saturated actuator

Sliding surface design with saturated actuator

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International Workshop on Variable Structure systems, VSS

作者： Deepak Fulwani B Bandyopadhyay Faculty of Electrical Engineering Indian Institute of Technology Rajasthan Jodhpur India IDP in Systems and Control Engineering IIT Bombay India

关键词： Switches Actuators Equations Closed loop systems Eigenvalues and eigenfunctions Sliding mode control Variable structure systems

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