Sensors, Vol. 24, Pages 2907: Research on High-Stability Composite Control Methods for Telescope Pointing Systems under Multiple Disturbances

Sensors, Vol. 24, Pages 2907: Research on High-Stability Composite Control Methods for Telescope Pointing Systems under Multiple Disturbances Sensors doi: 10.3390/s24092907 Authors: Rui Zhang Kai Zhao Sijun Fang Wentong Fan Hongwen Hai Jian Luo Bohong Li Qicheng Sun Jie Song Yong Yan During the operation of space gravitational wave detectors, the constellation configuration formed by three satellites gradually deviates from the ideal 60° angle due to the periodic variations in orbits. To ensure the stability of inter-satellite laser links, active compensation of the breathing angle variation within the constellation plane is achieved by rotating the optical subassembly through the telescope pointing mechanism. This paper proposes a high-performance robust composite control method designed to enhance the robust stability, disturbance rejection, and tracking performance of the telescope pointing system. Specifically, based on the dynamic model of the telescope pointing mechanism and the disturbance noise model, an H∞ controller has been designed to ensure system stability and disturbance rejection capabilities. Meanwhile, employing the method of an H∞ norm optimized disturbance observer (HODOB) enhances the nonlinear friction rejection ability of the telescope pointing system. The simulation results indicate that, compared to the traditional disturbance observer (DOB) design, utilizing the HODOB method can enhanc...
Source: Sensors - Category: Biotechnology Authors: Tags: Article Source Type: research
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