A Study on the Testing Method and Testing System of Vehicle Suspensions Performance Based on Virtual Instrument

摘要

On the basis of the vibration mechanical model and the motion equation of automobile suspension built, we analyse and propose a performance evaluation index of the suspension, and establish a new testing method for measuring the suspension performance. Using the virtual instrument technology, we develop an automobile suspension performance testing system. It adopts the PC-DAQ scheme. On the basis of the original excitation suspension performance testing table we equip the table with some necessary sensors, the personal computer and virtual software. Then the automobile suspension performance testing system is built. We can use it to measure the absorb efficiency, the vibration frequency, the physic difference and the corresponding vibration waveform and so on. It also provides the foundation for the integrated estimation of the suspension performance and fault diagnosis. By testing cars in practice, we have proved that the model is accurate and feasible and the testing system is exact and credible.