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Research Article
ScienceAsia 26 (2000) : 049-055 |doi: 10.2306/scienceasia1513-1874.2000.26.049
Structure of Discrete-Time H Controller
Waree Kongprawechnona, Shun Ushidab, Hidenori Kimurab
ABSTRACT: This paper is concerned with the investigation of the closed-loop structure of an H control
system. It is shown that H controller is represented, like Linear Quadratic Gaussian control, as a pseudo
state feedback, that is, a state feedback interconnected with an observer. However, in the H control
problem (in particular, discrete-time cases) the control structure is more complicated since we cannot
choose the state feedback and the observer independently.
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a Sirindhorn International Institute of Technology Thammasat University, Patum-thani, Thailand.
b Faculty of Engineering, The University of Tokyo, Bunkyo, Tokyo, Japan.
Received 2 Jun 1999, Accepted 4 Feb 2000
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