8 September 2011 The LQG/LTR controller design for miniaturized infrared stabilizing platform
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Abstract
In order to overcome the process disturbance and measurement noise brought by the low-cost miniaturized infrared stabilizing platform, linear-quadratic-Gaussian with loop-transfer-recovery (LQG/LTR) theory is proposed for the design of stabilizing controller to improve performance of the platform. The state-space model representing the dynamics of stabilizing platform has been developed. Based on the model, state variables are estimated using Kalman-filter and then the LQG controller is designed. LTR methodology is carried out to recovery the loop transfer of LQR and compensate for the deficiency of worse stability robustness. The well-designed miniaturized infrared stabilizing platform is simulated in both frequency-domain and time-domain. The results show that there are many required characteristics in the stabilizing platform designed with the proposed method. It has good disturbance rejection and noise-free, which enhances the stability robustness. It can acquire wide bandwidth that brings about the faster output response. On the basis of the design it is convenient to implement the infrared tracking platform with zero steady-error.
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Renxin Xiao, Renxin Xiao, Tao Li, Tao Li, Pinyi Zhang, Pinyi Zhang, Xianguang Jia, Xianguang Jia, Ying Qin, Ying Qin, Chunqiao Xian, Chunqiao Xian, } "The LQG/LTR controller design for miniaturized infrared stabilizing platform", Proc. SPIE 8193, International Symposium on Photoelectronic Detection and Imaging 2011: Advances in Infrared Imaging and Applications, 81931B (8 September 2011); doi: 10.1117/12.899751; https://doi.org/10.1117/12.899751
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