Light truck models generally adopt the front engine and rear drive scheme. The powertrain and rear drive axle are usually connected by two transmission shafts, and the power is transmitted by cardan joint. In actual automotive research and development projects, there are often problems with the design or assembly process of the transmission system, resulting in a large equivalent angle of the transmission system, resulting in low-speed driving vibration of the entire vehicle. This paper analyzes the low-speed vibration problem of a certain light truck during the engineering prototype stage, and obtains the mechanism of low-speed vibration by analyzing the order characteristics of vibration and the modal characteristics related to the entire vehicle system. Targeted optimization has been carried out, and the vibration of the entire vehicle has been significantly improved.

Full text: IJEIR_2955_FINAL.pdf