Digital redesign of a continuous controller based on closed loopperformance
Kennedy, R.A.
Evans, R.J.
Dept. of Syst. Eng., Australian Nat. Univ., Canberra, ACT;
This paper appears in: Decision and Control, 1990., Proceedings of the 29th IEEE Conference on
Publication Date: 5-7 Dec 1990
On page(s): 1898-1901 vol.3
Meeting Date: 12/05/1990 - 12/07/1990
Location: Honolulu, HI, USA
References Cited: 4
INSPEC Accession Number: 4030332
Digital Object Identifier: 10.1109/CDC.1990.203950
Current Version Published: 2002-08-06
Abstract
The authors present a digital controller redesign philosophy which
attempts to match the closed-loop performance of a nominal
continuous-time controller using a model-following design setting. The
requirement of excessive sampling rates necessary with a number of
popular existing techniques (e.g. the prewarped bilinear transform
redesign) is largely obviated. Sampling rates close to twice the
closed-loop bandwidth (Nyquist rate) give good performance with the
proposed technique. It is concluded that the proposed model can be used
as is for an analog-to-digital redesign which appears to work favorably
at low sampling rates, or it can be used as a starting point for further
pole-zero placement
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