Error-Based Observer of a Charge Couple Device Tracking Loop for Fast Steering Mirror
AbstractThe charge couple device (CCD) tracking loop of a fast steering mirror (FSM) is usually used to stabilize line of sight (LOS). High closed-loop bandwidth facilitates good performance. However, low-rate sample and time delay of the CCD greatly limit the high control bandwidth. This paper proposes an error-based observer (EBO) to improve the low-frequency performance of the CCD tracking system. The basic idea is by combining LOS error from the CCD and the controller output to produce the high-gain observer, forwarding into the originally closed-loop control system. This proposed EBO can improve the system both in target tracking and disturbance suppression due to LOS error from the CCD’s sensing of the two signals. From a practical engineering view, the closed-loop stability and robustness of the EBO system are investigated on the condition of gain margin and phase margin of the open-loop transfer function. Two simulations of CCD experiments are provided to verify the benefits of the proposed algorithm. View Full-Text
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Tang, T.; Deng, C.; Yang, T.; Zhong, D.; Ren, G.; Huang, Y.; Fu, C. Error-Based Observer of a Charge Couple Device Tracking Loop for Fast Steering Mirror. Sensors 2017, 17, 479.
Tang T, Deng C, Yang T, Zhong D, Ren G, Huang Y, Fu C. Error-Based Observer of a Charge Couple Device Tracking Loop for Fast Steering Mirror. Sensors. 2017; 17(3):479.Chicago/Turabian Style
Tang, Tao; Deng, Chao; Yang, Tao; Zhong, Daijun; Ren, Ge; Huang, Yongmei; Fu, Chengyu. 2017. "Error-Based Observer of a Charge Couple Device Tracking Loop for Fast Steering Mirror." Sensors 17, no. 3: 479.
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