Frequency Characteristics Analysis of Vibration System for Planetary Wheeled Vehicle
Yuchuan Lu, Zhiqi Du, Bo Su, Lei Jiang, Guoxuan Lu, Zhijie Zhang · 2013
In order to consider the sink effect that caused by the mental wheels when the planetary wheeled vehicle is driving on the soft soil, 7-DOF spatial vibration model of the whole vehicle is rebuilt. Differential equations of this system are obtained by Lagrangian equations. Then the mathematical expressions of the frequency characteristics are derived, which respectively belong to the motion of the body center-of-mass, the dynamic deflections of the four suspensions and the relative dynamic loadings of the four equivalent wheels. Finally, the corresponding amplitude-frequency characteristic curves and phase-frequency characteristic ones are presented by MATLAB, and the frequency characteristics of the whole vehicle vibration system are also analyzed. Simulation results show that the designed parameters of the vehicle are reasonable. The analytic expressions solved above have a certain guiding significance in theory for vehicle vibration study, vibration control and vehicle-related parameters optimization. Copyright © 2013 IFSA.