A Pointing and Tracking Control Method for a Flexible Satellite Containing a 6-DOF Vibration Isolation Platform

Abstract

The invention discloses a pointing and tracking control method for a flexible satellite with a six-degree-of-freedom vibration isolation platform. Aiming at the flexible satellite with a six-degree-of-freedom vibration isolation platform, an easy-to-use method is designed based on time domain and frequency domain indicators. The pointing and tracking control method realized by the project. First, considering the vibration characteristics of the control moment gyroscope, the dynamic models of the upper and lower platforms of the six-degree-of-freedom vibration isolation system are respectively established; then, the vibration isolation strut is equivalent to a three-parameter model, and the transmission of the flexible satellite vibration isolation platform is simplified function, and the parameters of the vibration isolation platform are designed according to the vibration isolation index; finally, to solve the problem that the target attitude and angular velocity change rapidly within a certain period of time during the pointing control process, the form and parameters of the controller are designed based on the frequency domain theory according to the performance index of the controller. The invention establishes the transfer function of the flexible satellite three-parameter vibration isolation platform, the designed vibration isolation parameters can effectively attenuate the high frequency vibration of the actuator, and the designed pointing tracking controller can meet the frequency domain index and time domain accuracy index, which can Widely used in practical engineering.

Description

technical field [0001] The invention relates to a method for pointing and tracking control of a flexible satellite with a six-degree-of-freedom vibration isolation platform. For the flexible satellite with the control moment gyro as the actuator for overall vibration isolation, the integrated control of the upper and lower platforms for pointing and tracking is realized. It can be applied to the attitude tracking control with rapid changes in the target attitude and angular velocity within a certain period of time, the flexible vibration suppression of the sailboard during the attitude maneuvering process, and the high-frequency vibration isolation of the actuator. Strong robustness. The invention belongs to the field of spacecraft attitude control. Background technique [0002] With the continuous deepening of aerospace applications and space exploration activities such as laser communication, space remote sensing, and deep space telescopes, the functions and structures o...

AI Technical Summary

Problems solved by technology

For the pointing and tracking control of master and slave satellites, the existing control methods include sliding mode control, adaptive control, active disturbance rejection control, regression control and combination control of various methods, etc. Although many advanced theories and method, but the controller design method based on the frequency domain method is still dominant in engineering applications

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