Abstract
Driver's seat of the heavy duty truck is usually supported by a spring-damper assembly on a cabin floor. This passive suspension isolates vibration from the cabin floor effectively except 2 to 3 Hz vibration, which gives uncomfortable ride for drivers, so it is necessary to isolate this low level vibration. To improve riding comfort of driver's seat, we have proposed active suspension system. In this study, the control system was designed with Coefficient Diagram Method (CDM). In order to examine the effectiveness of the system, we compared with optimal feedback control theory with feedforward link and the H^∞ control theory by numerical simulations. As a result, a good performance of the controller using CDM was able to be obtained.
