Investigation of dynamic characteristics for road vehicle based on multiple-input multiple-output vibration test

Abstract

Abstract This study is intended to investigate dynamic characteristics of a heavy truck. An experimental setup is designed for full vehicle vibration test consisting of four electro-mechanical shakers with high force rating (35000kgf). Transfer matrix is taken into account for multiple-input multiple-output (MIMO) vibration control. Vibration inputs under the tires can simulate both vertical and rotational excitations of the road. Furthermore, transfer function estimate (TFE) can be obtained based on the known road inputs and measured dynamic responses. Operational modal analysis has been carried out to identify the rigid mode shapes pitch, bounce, roll in low frequency range (1-10Hz). Based on experimental results, vibration response is higher on seat, which results in an uncomfortable level.