Design and Experimental Study of Metal Rubber Vibration Isolator for the Load in the Launch Section of Flywheel

Flywheel is the key rotating component of spacecraft such as satellite, which has the functions of positioning, energy storage and control. However, during the rocket launch phase, the inertial actuator is subjected to excessive vibration. In order to prevent structural damage or equipment failure of these actuators, isolation of base vibration must be considered. Therefore, a design and optimization method of metal rubber vibration isolator tailored for momentum wheel is proposed. The isolator is composed of a spring-like frame in parallel with MR. A finite element model of the coupling between the transverse slot spring and the simplified momentum wheel is established. The structural configuration of the spring-like frame is optimized to minimize the bandwidth of the first 6 modes. On this basis, stress optimization is carried out to achieve uniform stress distribution throughout the frame. MR Is then designed to provide damping and additional stiffness. Finally, the performance of the metal rubber isolator is verified by experiments. In the sweep frequency test, the resonant frequency of the metal rubber isolator is within the required range, and the peak value of acceleration transmission is less than 9. In the random vibration test, the vibration reduction rate of metal rubber vibration isolator is greater than 84%, which has good vibration reduction effect and strong engineering applicability.