Synthesis of sampled feedback systems for prescribed time domain tolerance
作者:
MARCEL SIDI,
期刊:
International Journal of Control
(Taylor Available online 1977)
卷期:
Volume 26,
issue 3
页码: 445-461
ISSN:0020-7179
年代: 1977
DOI:10.1080/00207177708922321
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
This paper presents a design procedure for single-loop sampled feedback systems in which the plant transfer function has prescribed bounds on its parameters. The plant is imbedded in a ‘ two-degree-of-freedom system’, which is to be designed such that the system time response to a deterministic input lies within specified boundaries. The design procedure is based on frequency concepts. The time-domain tolerances are translated into equivalent frequency response tolerances. The latter lead to bounds on the loop-transmission L(jv) [v=tang (π/WS)[, in the form of continuous curves on the Nichols chart. However, due to inherent theoretical difficulties existing in sampled feedback systems, it might happen that no L(jv) can be found so that the design specifications of the problem are achieved. The design procedure is transparent enough to guide the designer in which direction to change the specifications of the problem so that the next trial design will be successful.
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