A Vibration Absorbing and Damping Device for Controlling Moment Gyro Rotor System

Abstract

The invention discloses a vibration absorption damping device for a control moment gyro rotor system. The vibration absorption damping device comprises a counter weight, a damping unit and a cantilever wave plate; the cantilever wave plate is sequentially provided with a cantilever end, a corrugated section and a fastening end; a groove structure is arranged under the cantilever end, the damping unit capable of providing rigidity is arranged inside a groove in the cantilever end of the cantilever wave plate, and the damping unit can drive the cantilever wave plate to vibrate synchronously; the counter weight is arranged over the cantilever end of the cantilever wave plate, the counter weight, the cantilever wave plate, the damping unit and an end cover of the control moment gyro rotor system are connected through bolts, and the rigidity of the damping unit is adjusted through tightening torque; the bottom surface and the top surface of the corrugated section of the cantilever wave plate are attached to the end cover and a shell body of the control moment gyro rotor system correspondingly; and when the cantilever wave plate vibrates, dry friction is generated between the cantilever wave plate and the end cover of the control moment gyro rotor system as well as between the cantilever wave plate and the shell body of the control moment gyro rotor system. According to the vibration absorption damping device for the control moment gyro rotor system, compared with the prior art that a flexible link is introduced so as to increase system vibration modes, the vibration mode of the control moment gyro rotor system cannot be changed, and vibration absorption in a real sense is achieved.

Description

technical field [0001] The invention relates to a vibration absorbing and damping device for a control moment gyro rotor system, which is suitable for vibration suppression of the control moment gyro rotor system. Background technique [0002] Control Moment Gyro (Control Moment Gyro-Control Moment Gyro) is a key actuator for attitude control of long-running large spacecraft such as space stations. Due to the mass imbalance of the rotor system, bearing manufacturing defects and natural vibration of the structure, the control torque gyro will inevitably produce a small disturbance force with periodic and broadband characteristics while generating the control torque. The modulation and amplification of internal dynamic characteristics will have a great impact on the pointing accuracy and stability of precision equipment such as spacecraft optical platforms. Therefore, effective vibration suppression measures must be taken for the control moment gyroscope to reduce the vibratio...

AI Technical Summary

Problems solved by technology

The vibration isolation platform seems to avoid the problem of directly changing the stiffness of the rotor system in the vibration isolation design, but because the whole system introduces a flexible link, on the one hand, the new system of control moment gyroscope with vibration isolation platform will be introduced. More vibration modes, on the other hand, will affect the output torque and control accuracy of the control torque gyroscope, and will eventually face the choice between vibration level and control accuracy

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