Design of Disturbance Decoupled Observer for Bilinear Systems

[+] Author and Article Information
A. Hać

Department of Mechanical Engineering, State University of New York at Stony Brook, Stony Brook, N.Y. 11794

J. Dyn. Sys., Meas., Control 114(4), 556-562 (Dec 01, 1992) (7 pages) doi:10.1115/1.2897724 History: Received March 21, 1989; Revised February 01, 1992; Online March 17, 2008


An observer for a bilinear system with an unknown unmeasurable disturbance is considered. Necessary and sufficient conditions for the existence of disturbance decoupled full order and minimal order observers are formulated. The conditions analogous to detectability and pole assignment of linear observers are also given. These conditions provide a basis for verification of observer existence and design procedures to select observer matrices using straightforward matrix calculus. The observers are intended for application to the state estimation of a semi-active vehicle suspension system and the design procedures are illustrated for this particular case. The procedures developed, however, are general and can be applied to any bilinear system.

Copyright © 1992 by The American Society of Mechanical Engineers
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