Robust Disturbance Rejection for Left-Invertible Linear Systems With Nonlinear-Uncertain Structure

[+] Author and Article Information
F. N. Koumboulis

University of Thessaly, Department of Mechanical & Industrial Engineering, 38334 Pedion Areos, Volos, Greece

M. G. Skarpetis

National Technical University of Athens, Department of Electrical and Computer Engineering, Div. of Electroscience, Athens, Greece

J. Dyn. Sys., Meas., Control 121(2), 218-225 (Jun 01, 1999) (8 pages) doi:10.1115/1.2802458 History: Received April 24, 1997; Online December 03, 2007


The problem of robust disturbance rejection for left invertible linear systems, with nonlinear uncertain structure and with measurable and nonmeasurable disturbances, is solved via an independent from the uncertainties static measurement output feedback law. The necessary and sufficient conditions for the problem to have a solution are established. The general explicit expression of the measurement output feedback matrix and the measurement disturbances feedback matrix are derived. The feedback invariant poles are determined. Sufficient conditions for robust disturbance rejection with simultaneous robust stability are also established. The rejection of the influence of the rotary gust disturbing the vertical velocity of the longitudinal motion of an aircraft is achieved.

Copyright © 1999 by The American Society of Mechanical Engineers
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