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.
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