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Author Tavakoli, M. ♦ Taghirad, H.D. ♦ Abrishamchian, M.
Sponsorship Lee Found. ♦ IEEE Montreal Sect. ♦ Candian Soc. Mechanical Eng
Source IEEE Xplore Digital Library
Content type Text
Publisher Institute of Electrical and Electronics Engineers, Inc. (IEEE)
File Format PDF
Copyright Year ©2003
Language English
Subject Domain (in DDC) Computer science, information & general works ♦ Data processing & computer science ♦ Technology ♦ Engineering & allied operations
Subject Keyword Robust control ♦ Actuators ♦ Oscillators ♦ Parameter estimation ♦ Control system synthesis ♦ Nonlinear control systems ♦ Nonlinear systems ♦ Linear systems ♦ Uncertainty ♦ Robust stability
Abstract RTAC benchmark problem considers a nonlinear fourth-order dynamical system involving the nonlinear interaction of a translational oscillator and an eccentric rotational proof mass. This problem has been posed to investigate the utility of a rotational proof mass actuator for stabilizing translational motion. In order to implement any of the model-based controllers proposed in the literature, the values of model parameters are required which are generally difficult to determine rigorously. In this paper, an approach to the least-squares estimation of system parameters is discussed and practically applied to the benchmark problem. Next, in order to design an H∞controller, the nonlinear system is modelled as a perturbed linear system using an effective identification scheme. Experimental results confirm that this approach can effectively condense the whole nonlinearities, uncertainties, and disturbances within the system into a favorable perturbation block. Finally, an effective mixed-sensitivity problem is developed for the system to satisfy all performance requirements as well as robust stability despite actuator saturation.
Description Author affiliation: Department of Electrical and Computer Engineering, University of Western Ontario, Canada. E-mail: tavakoli@uwo.ca (Tavakoli, M.)
ISBN 078037777X
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Research ♦ Reading
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2003-06-12
Publisher Place Canada
Rights Holder Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Size (in Bytes) 852.82 kB
Page Count 5
Starting Page 765
Ending Page 769


Source: IEEE Xplore Digital Library