Self-adaptive framework control system and method for improving control moment gyroscope bandwidth

Abstract

The invention discloses a self-adaptive framework control system and method for improving control moment gyroscope bandwidth. The system comprises a self-adaptive double-loop PI controller, a speed observer and a bearing aging degree judgment module; the self-adaptive double-loop PI controller is used for controlling a low-speed framework motor of a control moment gyroscope and is established on the basis of a traditional current-loop and speed-loop double-loop PI controller, wherein gain parameters in the current-loop and speed-loop PI controller all have a self-adaptive adjustment function;the speed observer is used for observing the difference between relative actual speed and relative instruction speed of the low-speed framework motor of the control moment gyroscope and converting thedifference into a criterion of self-adaptive control; and the bearing aging degree judgment module is used for judging the change of frictional resisting moment after long-time running of a bearing and under the initial condition of the bearing, and the gain parameters of the self-adaptive double-loop PI controller are self-adaptively adjusted according to the change of the frictional resisting moment.

Description

technical field [0001] The invention relates to a frame control system and method for increasing the response bandwidth of a control moment gyroscope, which is suitable for frame control of control moment gyroscope products. Background technique [0002] The control torque gyro is the core executive component for the rapid maneuvering and stability of the spacecraft attitude. It is composed of high-speed components and low-speed frames. High ratio, fast response, high precision output torque. [0003] Since the low-speed frame shafting of the control moment gyroscope adopts solid-lubricated four-point bearings, the frictional resistance torque of the low-speed frame shafting of the control moment gyroscope will gradually increase with the long-term in-orbit operation of the control moment gyroscope. This is due to the fatigue wear of the solid lubricating film caused by the cyclic rolling of the steel balls and the continuous loss of the solid lubricating film caused by the...

AI Technical Summary

Problems solved by technology

Patent CN 105786036 B proposes to use the scheme of adding feedforward control to achieve the effect of improving the torque control accuracy, but does not provide a scheme to realize the improvement of the response bandwidth under the condition of ensuring the control accuracy

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