Compact Hinfinity robust rebalance loop controller design for a micromachined electrostatically suspended gyroscope
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Published on: August 15, 2014
Gaoyin Ma1, Wenyuan Chen, Weiping Zhang
1National Key Laboratory of Nano/Micro Fabrication Technology, Key Laboratory for Thin Film and Microfabrication of Ministry of Education, Institute of Micro and Nano Science and Technology, Shanghai Jiao Tong University, Shanghai, 200240, China.
Abstract:
In this paper, we design a compact H(infinity) robust rebalance loop controller that is featured with comprehensive performance achievement and relatively easy practical implementation for a dual-axis micromachined rotational gyro. By incorporating the bilinear pole-shifting transform into the weighted multivariable mixed-sensitivity framework, the design procedure of the robust controller is able to allow for various realistic performance requirements in terms of steady-state error, dynamic response characteristics, disturbance rejection and robustness to parametric variations. In comparison with a conventional decentralized lead-lag controller, the H(infinity) robust controller, which is considered as an efficient substitute for the former, is thoroughly analyzed and simulationally validated under a set of realistic scenarios.
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