Aiming at the problem that micro-electro-mechanical system（ MEMS） sensor is stuck on PCB in inertial measurement unit（ IMU）

the mechanical vibration generated by external carrier is forced to vibrate

longterm effects can cause problems such as mechanical fatigue

structural fracture

and performance degradation of the sensor

according to the principle of structural dynamics

the two-degree-of-freedom system model is analyzed

and the simulation is performed by MATLAB software to find out the influencing factors and their setting range. At the same time

the signal transmitted to the accelerometer by 1︰1 within the accelerometer bandwidth is guaranteed.The research results show that when the mechanical vibration signal of the carrier is in the range of 10 kHz

appropriately reduce the quality factor of the gyroscope and the accelerometer

natural frequency of the PCB is kept within 1 k Hz and the quality factor is not more than 10

which can effectively reduce the influence of vibration stress on the sensor.