Abstract
While the transport volume has remained unchanged, the number of truck drivers has decreased in recent years. As a result, the time an individual truck driver spends on the road has increased, exposing driver to increased vibration. The burden on drivers has increased and ride-comfort decreases. Thus, improvement of ride-comfort is important by vibration reduction to truck driver. However, a method to quantitatively evaluate ride-comfort in the truck and cars has not been established. The purpose of this study is to improve the ride-comfort of trucks using a semi-active seat suspension and quantitatively evaluate the ride-comfort using the ride coefficientAccording to the results, a semi-active seat suspension which uses HQO control showed better ride-comfort than a passive seat suspension. Additionally, a control system which focuses on the prevention of chattering was more effective for ride-comfort than a control system which focuses on vibration reduction.
