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Implementation Methods of Controllers Designed by H8 Loop Shaping
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DOI：10.1109/TAC.2022.3223278.png)
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摘要
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When the H-8 loop-shaping controller is implemented as a unity feedback system, its step responses are sometimes unsuitable for tracking control, typically, displaying large overshoots. In this article, the implementation method is studied for tracking control with small overshoots. Three implementation methods that are described by a unity feedback system, a previous simple two-degrees-of-freedom (2DoF) system, and a new simple 2DoF system proposed in this article are examined. For the closed-loop transfer function of each system, the unstable zeros are analyzed and an upper bound of the peak gains is presented. These results show that the two simple 2DoF systems have adequate properties for tracking control with small overshoots. The new 2DoF system has good features that the system is minimum phase if the plant is minimum phase, and that the resonance peak gain is one. Their tracking performances are compared in several numerical examples.
Keyword:
H-8 control
linear time-invariant system
loop-shaping design
two-degrees-of-freedom (2DoF) control
期刊
IF:
7
论文数:
1.3W
被引数:
6.7W
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