A novel scissor-type magnetorheological seat suspension system with self-sustainability

Abstract

A novel scissor-type magnetorheological seat suspension with self-sustainability which integrated self-powered, self-sensing, and self-adaptability is proposed in this study. The adaptive rotary damping system consisted of the rotary magnetorheological damper, and rotary permanent magnet direct current generator is designed to realize the self-sustainability. Effects of damping force and isolation object mass are analyzed for further designing and testing based on the dynamic model. The rotary magnetorheological damper and the electrical part are designed and analyzed theoretically. Series of experimental tests are conducted to verify the feasibility and control performances. The experimental results show that the on–off balance control algorithm based on the self-sensing signals can improve the comfort than the directly and supply-with-rectifier control modes.

Design, modeling, and control of a magnetorheological rotary damper for scissor seat suspension

“…To analyze the performances of the suspension with rotary damper, a dynamic model is established as 16…”

“…7 is the drum-type MR damper applied in seat suspension. 16 No. 8 is the hybrid type MR rotary damper of seat suspension.…”

“…Ning et al 15 analyzed the performances of seat suspension with rotary MR damper and active motor. In our prior study, 16 the self-sustainable seat suspension with a drum-type damper is tested and analyzed. The conventional rotary dampers cannot balance the conflict of high torque and limited volume.…”

“…The scissor legs rotate with the relative movement of upper base and lower base. The bearings are fixed at the end of legs to decrease the uncontrolled friction force.To analyze the performances of the suspension with rotary damper, a dynamic model is established as16 …”

Development and evaluation of a highly adaptive MRF-based absorber with a large effective frequency range

“…The storage modulus of MRF in the pre-yield region increases rapidly in response to the increasing magnetic field, after entering the post-yield region, the storage modulus tends to level off and become stable. The field-dependent shear stress in the post-yield region has been widely used for engineering applications, such as MR dampers for structural vibration control [15], vehicle suspension development [16], and seat suspension implementation [17][18][19][20] , while its property of stiffness controllability in the pre-yield region is seldom explored or utilized for engineering applications. In fact, the large stiffness controllability range in the pre-yield working region enables MRF to be an ideal material to work as a controllable-stiffness component for adaptive absorbers implementations.…”