OPTIMAL TRADEOFF BETWEEN H-2 PERFORMANCE AND TRACKING ACCURACY IN SERVOCOMPENSATOR SYNTHESIS

Citation
Ag. Sparks et Ds. Bernstein, OPTIMAL TRADEOFF BETWEEN H-2 PERFORMANCE AND TRACKING ACCURACY IN SERVOCOMPENSATOR SYNTHESIS, Journal of guidance, control, and dynamics, 18(6), 1995, pp. 1239-1243
Citations number
7
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Instument & Instrumentation","Aerospace Engineering & Tecnology
ISSN journal
0731-5090
Volume
18
Issue
6
Year of publication
1995
Pages
1239 - 1243
Database
ISI
SICI code
0731-5090(1995)18:6<1239:OTBHPA>2.0.ZU;2-R
Abstract
The problem of optimal H-2 disturbance rejection while tracking uncert ain constant or sinusoidal reference commands is considered. The inter nal model principle is used to ensure that the tracking error approach es zero asymptotically. Necessary conditions are given for controllers that minimize an H-2 disturbance rejection cost plus a worst-case int egral square tracking error for transient tracking performance. The ne cessary conditions provide expressions for the gradients of the cost w ith respect to each of the control gains. These expressions are then u sed in a quasi-Newton gradient search algorithm to determine the optim al feedback gains. Numerical examples demonstrate the tradeoff between the two competing objectives in the cost function.