基于DUEA的天线伺服控制系统仿真

doi:10.7527/S1000-6893.2021.24986

Abstract

Abstract: The large aperture radio telescope is vulnerable to exogenous disturbances such as gusts,systemic uncertainties, and difficulty in achieving high pointing accuracy. To realize the high-performance objective of the telescope control system, the method based on loop shaping and Disturbance/Uncertainty Estimation and Attenuation (DUEA) is proposed. First, a main controller for the nominal model is designed by the approach of mixed sensitivity H_∞ to realize the optimal tracking to the input signal. Second, based on the idea of Equivalent Input Disturbance (EID), the external disturbances and systemic uncertainties affecting the system output are equivalently observed and compensated using a Generalized Extended State Observer (GESO). Finally, it is verified by simulation experiments that in the presence of parameter uncertainties as well as input disturbance in the system, the dispersion of system performance indexes using the proposed H_∞-GESO controller is 66.7% and below than that only using the mixed sensitivity H_∞ controller, and the antenna control performance is significantly improved.

Key words: radio telescope, antenna, systemic uncertainties, Disturbance/Uncertainty Estimation and Attenuation (DUEA), mixed sensitivity H_∞, Generalized Extended State Observer (GESO)

CLC Number:

V245.4
TP29

LI Ning, LIU Zhiyong, WANG Na, YANG Lei. Simulation on antenna servo control system based on DUEA[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2022, 43(2): 324986-324986.

References

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Simulation on antenna servo control system based on DUEA

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