In order to solve the problem that the root mean square (RMS) value of acceleration response of flywheel bracket under random vibration is too large during the structural design of micro satellite in the initial sample stage. The frequency band with larger RMS contribution is compared with the input of this frequency band. Based on this, an optimization design method of flywheel bracket in finite space is proposed. The mechanical test results of the positive sample stage indicate that: the magnification of the optimized flywheel bracket under random vibration is reduced by about 30% compared with the original design, which meet the environmental test requirements of flywheel. The validity of the optimal design of the flywheel bracket is verified.
 

root mean square;random vibration;flywheel bracket;magnification