Leaf Spring Combined Dynamic Vibration Absorber for Satellite Flywheel

Abstract

The invention discloses a leaf spring combined dynamic absorber for a satellite flywheel. A connecting base is fixed on a base plate; a guide rail is fixed at one end of the connecting base; a ball screw is arranged on the guide rail; a ball nut sliding block is arranged on the ball screw; a switchover block is arranged on the ball nut sliding block; a leaf spring assembly comprises two groups of leaf springs; one ends of the two groups of leaf springs are respectively connected with two sides of a vibration absorbing mass block, and the other ends of the two groups of leaf springs are respectively connected with the switchover block and the base plate. The leaf spring combined dynamic absorber disclosed by the invention is designed in a lightweight manner, utilizes the combined springs to modulate the frequency, adjusts the inherent frequency of the structure according to change of the revolving speed of the flywheel, controls and restrains the vibration of the flywheel at a lower magnitude, ensures high stability and reliability of in-orbit operation of the high-precision sensitive load on the satellite, and has the advantages of high frequency tracking speed, excellent vibration damping performance, simplicity in structure, high reliability, good convenience in assembly and low manufacturing cost.

Description

technical field [0001] The invention relates to a dynamic vibration absorber, in particular to a leaf spring combined dynamic vibration absorber for satellite flywheels. Background technique [0002] With the development of my country's satellites towards high precision, high stability and long life, the sensitive loads carried by them have higher and higher requirements for the micro-vibration environment of the satellite platform. Flywheel vibration is the main factor affecting the performance index of satellite payload, so it is very urgent to suppress flywheel vibration. Commonly used flywheel vibration control methods include damping vibration reduction, structural rigidity, vibration isolation and so on. Damping and vibration reduction are only effective at resonance; structural rigidity will increase the mass of the satellite; passive vibration isolation reduces the stiffness of the connection between the load and the platform, and reduces the load pointing accuracy;...

AI Technical Summary

Problems solved by technology

The effect of damping and vibration reduction is only obvious when it is in resonance; the rigidity of the structure will increase the mass of the satellite; passive vibration isolation reduces the connection stiffness between the load and the platform, and reduces the load pointing accuracy; active vibration isolation has high energy consumption and poor stability

[0003] After searching the literature of the prior art, it is found that there is no leaf spring combined dynamic vibration absorber used for satellite flywheels. The design constraints of the leaf spring combined dynamic vibration absorber mainly include three aspects: First, the frequency adjustment of the dynamic vibration absorber should be expanded The second is to reduce the vibration response amplitude of the flywheel mounting plate during on-orbit operation; the third is to realize the optimized design of the vibration-absorbing mass and the envelope size of the spring to increase the stability, reliability and safety of the structural performance

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