多回路气动伺服弹性系统稳定裕度的变结构μ分析方法

doi:10.7527/S1000-6893.2016.0201

Abstract

Abstract:

Aeroservoelastic system is a multi-input-multi-output (MIMO) system with its control loops coupled with each other, while currently there is no unified theory in regard to the stability margin of the control loops. This paper addresses this problem by first analyzing the existing return difference matrix method and the μ synthesis method, and then proposing a new method to reduce the conservativeness during analysis. This new method, called the variable-structure μ synthesis method, solves the stability margin through adjusting the perturbation model in several iterations and is proved to have fast convergence property. Finally, different methods are used to calculate the stability margins of the gust alleviation system of a flexible aircraft, and the results show that the proposed approach is less conservative compared with the existing methods.

Key words: aeroservoelasticity, multi-input-multi-output system, coupling, stability margin, variable-structure μ synthesis

CLC Number:

V249.1

LIU Xiang, SUN Qin. Variable-structure μ synthesis method for stability margin of multiloop aeroservoelastic system[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2017, 38(4): 120350-120350.

References

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Variable-structure μ synthesis method for stability margin of multiloop aeroservoelastic system

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