光学精密工程2024，Vol.32Issue(8)：1153-1163,11.DOI:10.37188/OPE.20243208.1153
空间天文望远镜自适应精密稳像闭环控制
Adaptive precision image stabilization control closed-loop method for space astronomical telescope
摘要
Abstract
An adaptive closed-loop control method for precision image stabilization based on active optical technology was proposed to compensate for low-frequency LOS disturbances in space astronomical tele-scopes.The fine guide sensor(FGS)was used as a high-precision LOS disturbance detector,and the four-point supporting large-aperture fast steering mirror(FSM)mechanism drove by piezoelectric actuators(PZT)was used as a LOS disturbance compensator in this method.First,a PID controller was connected in series with an integral link for precise image stabilization closed-loop control to obtain the two-dimen-sional swing angles of the FSM required to compensate for the two-dimensional LOS disturbance detected by FGS.Furthermore,the expansion amount of each PZT was calculated through driving structure.Then,the feedforward compensation method based on generalized Bouc-Wen inverse hysteresis model was used for high-precision positioning control of the piezoelectric ceramic actuator.Finally,according to supervised Hebb learning rules,the single neuron with self-learning and adaptive abilities was used to ad-just the PID controller parameters,thereby obtaining the optimal controller parameters.The experimental results show that the proposed control method can effectively compensate the LOS disturbance of the space astronomical telescope,and the integral value of PSD of the position error of the star point centroid in the X direction and Y direction of the FGS can be suppressed by 98.54%and 98.62%respectively in the frequency band of 0～6 Hz.关键词
空间天文望远镜/精密稳像/精细导星仪/大口径快摆镜机构/迟滞补偿/单神经元自适应PID控制Key words
space astronomical telescope/precision image stabilization/fine guide sensor/fast steering mirror/hysteresis compensation/single-neuron adaptive PID control分类
天文学引用本文复制引用
张泉,魏传新,高源蓬,朱雨霁,李清灵,房陈岩,周显宜,尹达一..空间天文望远镜自适应精密稳像闭环控制[J].光学精密工程,2024,32(8):1153-1163,11.基金项目
国家自然科学基金资助项目(No.12103075) （No.12103075）
