The invention discloses a method and a device for acquiring and
processing vibration spectrum data of an
electric drive system, which aim to solve the problem that the vibration durability of the
electric drive system cannot be effectively verified due to the fact that no clear vibration spectrum acquisition method exists in the field of
new energy automobiles at present. A tested
electric drive system is installed on a
test bench, and a plurality of three-phase vibration sensors are installed on the tested electric drive system; the tested electric drive system performs speed-up and speed-down operation, and in the operation process of the motor, a vibration curve of the
vibration acceleration of each working condition point relative to the rotating speed of the motor is collected in thewhole process; the vibration curves acquired by all the three-phase vibration sensors are summarized, and the vibration curves of each three-phase
vibration sensor mounting point and each vibration direction on the tested electric drive system are analyzed;
sinusoidal vibration spectrum data in each vibration direction are obtained through FFT
algorithm analysis. The vibration spectrum of the electric drive system under the simulated real vehicle operation condition is effectively reflected, and the reliability of the electric drive system vibration durability experiment is improved.