A driving simulation and a test are conducted on the electric mini off-road vehicle. The law of the vibration performance of off-road vehicles with respect to suspension stiffness and the damping coefficient is obtained through the analysis of optimized results. Based on the parameters obtained through the optimum design of a 1/4 vehicle model, the optimized stiffness and damping coefficient of suspension are obtained using a MATLAB optimization program. A comprehensive objective function and a constraint condition are established for comfort and safety. Road surface roughness information is obtained using an instrument for measuring road roughness. The input matrix of pavement unevenness is obtained by considering the mutual power spectrum density between front and rear wheels. According to the 5-degree-of-freedom vibration model of an electric mini off-road vehicle, the partial differential matrix equation of system motion is established using the Lagrange method, and the frequency response characteristic of the system is analyzed. The aim of this study is to explore the influence of road information on ride comfort and enhance the ride comfort of mini vehicles. Mini vehicles with a small wheelbase are extremely sensitive to road roughness.
0 kommentar(er)
