Abstract
A frequency-based modeling approach has been developed for the vehicle fitted with Hydraulically Interconnected Suspension (HIS) system. This frequency-based model has fewer degrees of freedom (DOF) than the reference time-based model. Several physical parameters of HIS system are selected to analytically investigate their effects on several indicators of vehicle roll, pitch and bounce modes, such as roll and pitch angular acceleration, vertical acceleration, and tire ground force. The HIS system parameters are also coordinately tuned and optimized to meet the ride comfort requirement. The full vehicle drop test is conducted for the experimental validation. The analytical results of the proposed model have a good agreement with the measurements.
Highlights
Automotive suspension systems are important for vehicle handling stability and Noise, Vibration, and Harshness (NVH) behavior [1]
Zhang et al [13] overcame the trade-off between the ride comfort and handling performance of a mining vehicle by adjusting the suspension stiffness or damping parameters through active control methods
EXPERIMENTAL VALIDATION To validate the proposed condensed frequency-domain vehicle model, the full vehicle drop test is performed to compare the experimental results with the analytical results
Summary
Automotive suspension systems are important for vehicle handling stability and Noise, Vibration, and Harshness (NVH) behavior [1]. Zhang et al [13] overcame the trade-off between the ride comfort and handling performance of a mining vehicle by adjusting the suspension stiffness or damping parameters through active control methods. As shown in Fig., the original suspension system consists of spring and damper parts, in which the modal parameters of vehicle vibration modes can be obtained, as shown in Tab.. Based on Eq(14), (17) and (19), transformation matrix between the road disturbance Zg(s) and the vehicle state variables X(s) can be obtained:. The effects of the HIS parameters variations on the roll mode of the vehicle (a) pre-charged initial oil pressure p0; (b) area difference between the upper and lower chamber Af; (c) area ratio between the upper and lower chamber λAf; (d) damper valves coefficient Rv. to the DOFs of the HIS system, the proposed model shown in Eq(20) only has 7 state variables.
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