Abstract:
In disturbance-observer-based control, the closed loop system consists of a main feedback control loop and an inner disturbance observer loop. This paper presents a desig...Show MoreMetadata
Abstract:
In disturbance-observer-based control, the closed loop system consists of a main feedback control loop and an inner disturbance observer loop. This paper presents a design method for a disturbance observer to satisfy closed loop performance specifications, provided that the main feedback controller is known. Taking advantage of certain fixed-structure disturbance observers, the disturbance observer design problem can be transformed into the synthesis problem of H/sub /spl infin// (sub-) optimal static output feedback gain for an extended plant. The static output feedback gain, and therefore the disturbance observer, can be obtained by solving a series of convex optimization problems. Since the disturbance observer is designed based on closed loop consideration, the robust stability of the closed loop system is guaranteed.
Published in: Proceedings of the 2004 American Control Conference
Date of Conference: 30 June 2004 - 02 July 2004
Date Added to IEEE Xplore: 02 May 2005
Print ISBN:0-7803-8335-4
Print ISSN: 0743-1619