Electro-optical stabilization and tracking system is critical and difficult issue in satellite laser communication. Moreover,
line-of-sight stabilized system is the kernel of implementing electro-optical stabilization and tracking system, which can
be used to isolate the vibration of the moving platform of the satellite and the disturbance of the space environment. In
this paper, we propose a new method, which using H∞ mix sensitivity based on generalized internal model controller
(GIMC), to design the control system of the electro-optical stabilized platform. It is well known that there is an intrinsic
conflict between performance and robustness in the standard feedback framework. Generalized internal model controller
is a new architecture which can separate the performance and robustness design in controller design. This architecture
has two parts: a high performance controller, say K0,which is designed by PI controller in this paper, and then a
robustification controller, say Q, which is designed to improve the ability of the anti disturbance by using H-infinity mix
sensitivity controller design method. In this paper, we also present the steps of controller design by using this method to
make it easier to use. Based on the proposed method, numerical simulation and experiment are both carried out for a
gyro stabilized platform of electro-optical tacking system. Both the numerical simulated and the experimental results
show that the electro-optical stabilized platform using the H-infinity mix sensitivity controller design method based on GIMC
is accurate and effective. Comparing with the same PI controller in standard feedback framework, the proposed method
can guarantee the high tracking performance as same as the PI controller and improve the external disturbance
restraining ability a lot. In conclusion, H-infinity mix sensitivity controller design method based on GIMC is a new approach
for gyro stabilized platform of electro-optical stabilization and tracking system and might be used easily in practical.
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