Design of robust digital controllers and sampling-time selection for SISO systems
作者:
EVANGHELOS ZAFIRIOU,
MANFRED MORARI,
期刊:
International Journal of Control
(Taylor Available online 1986)
卷期:
Volume 44,
issue 3
页码: 711-735
ISSN:0020-7179
年代: 1986
DOI:10.1080/00207178608933629
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
The stability of a digital control system and its performance in terms of the continuous plant output are studied. A two-step controller design is proposed. In the first step, the assumption of no modelling error is made and a controller that combines properties of the algorithm that minimizes the sum of squared errors and a deadbeat-type algorithm is designed so that no intersample rippling appears. In the second step, a filter is designed so that appropriate conditions which guarantee robust stability and performance in the presence of model-plant mismatch are satisfied. The effect of the sampling time on the achievable performance and the robustness properties of the system is examined and the results are incorporated in a complete procedure for sampling-time selection and robust controller design. Finally, the procedure and some theoretical implications are illustrated with examples.
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