Title :
Direct reduced order discretization of continuous-time controller
Author :
Anderson, B.D.O. ; Chongsrid, K. ; Limebeer, D.J.N. ; Hara, S.
Author_Institution :
Dept. of Syst. Eng., Australian Nat. Univ., Canberra, ACT, Australia
Abstract :
The problem of closed-loop approximation of a continuous-time controller by a low order discrete-time controller is investigated. The operator representing the error in approximation can be approximated (arbitrarily closely) by a time-invariant discrete-time system resulting from applying fast sampling and lifting. We propose a method for obtaining a low-order discrete-time controller which makes small the approximation error based on recasting the approximation problem as a four-block H∞ problem
Keywords :
closed loop systems; continuous time systems; reduced order systems; sampled data systems; closed-loop approximation; continuous-time controller; direct reduced order discretization; fast sampling; four-block H∞ problem; lifting; low order discrete-time controller; time-invariant discrete-time system; Approximation error; Australia; Control systems; Educational institutions; Feedback control; Open loop systems; Sampling methods; Stability; System analysis and design; Systems engineering and theory;
Conference_Titel :
Decision and Control, 1996., Proceedings of the 35th IEEE Conference on
Conference_Location :
Kobe
Print_ISBN :
0-7803-3590-2
DOI :
10.1109/CDC.1996.574549
