Title :
H∞/LTR observer based controllers: Direct and indirect design methods
Author :
Stoustrup, J. ; Niemann, H.H.
Author_Institution :
Tech. Univ. of Denmark, Lyngby, Denmark
Abstract :
This paper describes two H∞ design methods for observer based controllers, where the controllers are required to satisfy specific loop transfer recovery (LTR) conditions. A general formulation of the LTR problem based on recovery errors is introduced along with the Q-observer based controller. The Q-observer is an implementation of the Youla (Q-) parameterization. Further, the H∞/LTR problem is stated in two different formulations, the indirect and the direct H∞/LTR problem. The indirect H∞/LTR problem, which is strongly related to the LQG/LTR problem, is solved by using the singular H∞ state-space approach due to A.A. Stoorvogel (1989) and to Stoorvogel and H.L. Trentelman (1990). Solutions to the direct H∞/LTR problem are derived and an example comparing the two methods is presented
Keywords :
State estimation; control system synthesis; optimal control; stability; state estimation; H∞/LTR observer based controllers; Q-observer; Q-parameterization; direct design methods; indirect design methods; recovery errors; singular H∞ state-space approach;
Conference_Titel :
Control 1991. Control '91., International Conference on
Conference_Location :
Edinburgh
Print_ISBN :
0-85296-509-5
