This paper reports on how to control the test conditions of vehicle accelerated testing by comparing the similarity of the load power spectra of vehicles structural components gathered respectively from the vehicle running on the test tracks and highways. The terms of the similarity were derived from a multi-input and multi-output model and verified by a series of testings. The effects of the test conditions on the similarity and the acceleration factor were investigated and analysed. Then, a kind of ideal test track, which is similar to the highways in the road profile power spectra, and on which the test vehicles could run at the normal speeds as in service, is proposed for vehicle accelerated testing. Not only an acceptable acceleration factor can be obtained, but also the correlation between the accelerated test and the service use could be ensured. (A)
Samenvatting