Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : December 09, 2021 - December 10, 2021
The burden of vibration on passengers during vehicle operation is significant, and prolonged exposure can cause vibration problems such as back pain. However, it is difficult for passive dampers to provide good insulation against steady and transient inputs. In this study, we develop a semi-active vibration control technique using the magnetorheological fluid damper installed in the seat suspension and adaptively changing the viscosity by applying magnetic field. The viscosity is switched according to the on/off and fuzzy controllers based on the skyhook theory, which discriminates the appropriate magnitude of the damping force from the combination of input signals. The effectiveness of the variable viscous damper is evaluated by simulating the system response under two excitations: steady-state excitation and shock input. The results show that the vibration reduction performance of on / off control and fuzzy control is not much different from that of highly viscous one, and acceleration reduction can be achieved at the same time.
