In the automobile industry, recently, simulation technology progresses rapidly, and analysis of Ride Comfort with a full vehicle model is on the increase. It will be an important theme bow to transform this performance, which depends on human sensitivity, into index in the future. To realize this, we must measure vehicle response first, however, there are problems of accuracy and dispersion of data from a proving ground test. Therefore, test equipment to reproduce the proving ground test condition on bench is necessary. When the existing test equipment reproduces Ride Comfort of the field test, there are some problems of deficiency in performance. So we introduced Bi-axial 4-Poster to solve these problems. As the result of verification of the new equipment for its reproduction accuracy, we were able to get favorable results at both high and low frequency. Moreover, we tried to reproduce bumpy phenomena, which are often concerned in Europe, on the equipment. Vehicle movement on the proving ground can be reproduced and it is able to evaluate and develop the bumpy phenomena with the new equipment. We will utilize Bi-axial 4-Poster for quantitative analysis and technology of Ride Comfort.
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