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A tuning algorithm for multivariable restricted structure control systems using subspace identification

Sanchez, A. and Katebi, M.R. and Johnson, M.A. (2004) A tuning algorithm for multivariable restricted structure control systems using subspace identification. International Journal of Adaptive Control and Signal Processing, 18 (9). pp. 745-770. ISSN 0890-6327

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Abstract

This paper presents a new method to design a restricted structure controller driving a multivariable plant using subspace identification methods. The algorithm employs data collected from closed-loop operation to identify an open-loop model of the plant using subspace identification. The method also requires knowledge of the first N impulse responses from the controller. The multivariable controller parameters are calculated by minimising a finite horizon LQG criterion subject to nonlinear constraints. Three simulation case studies are presented.