Our company introduced four post road simulator on 1994, mainly to evaluate and analyze the vehicles or vehicle components vibration for the research of the vehicles vibration comfortability. This equipment has been outfitted specially with theroad simulation program as well as the sin-sweep excitation test program, which is generally used for the test of vibration analysis. This program generally developed to research vehicle's strength and durability, but we investigated the application of it to the improvement of the vehicles vibration comfortability this time. Here we introduce one example of the use.
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