Digital redesign of a continuous controller based on closed loop performance

1 January 1990

conference paper
Published by Institute of Electrical and Electronics Engineers (IEEE)

p. 1898-1901 vol.3
https://doi.org/10.1109/cdc.1990.203950

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.

Keywords

This publication has 2 references indexed in Scilit:

Digitalization of existing continuous control systems
IEEE Transactions on Automatic Control, 1984
Zeros of sampled systems
Automatica, 1984