Abstract

Recently, numerous types of vehicles from conventional combustion engine system to flying taxi system are being actively developed by car manufacturing makers. As well known, several principal mechanisms affecting significant performances should be altered to create future vehicles showing the intelligence, unmanned capability, flight performance and multi-directional driving vehicles. Especially, the vehicle suspension systems which directly affect to both the ride comfort and steering stability need to be designed in terms of diverse dynamic motions of the specific vehicle. In this talk, a new rotary type of magnetorheological (MR) damper is proposed for a new vehicle system which whose height is very low and driving direction is free within allowable rotational angles. A mathematical modeling of MR damper is derived for a kind of conceptual vehicle and manufactured based on proper design values to meet the geometrical criteria. Subsequently, the field-dependent damping force and torque are experimentally evaluated as functions of the stroke displacement and velocity. The main differences of the results from traditional MR damper are discussed in the sense of the practical feasibility.

Biography (Seung-Bok Choi)

Seung-Bok Choi is a leading professor at Mechanical Engineering Department of The State University of New York, Korea (SUNY Korea) located in Incheon, Korea. He received his M.S. and Ph.D. degrees in Mechanical Engineering from Michigan State University, USA in 1986 and 1990, respectively. Since 1991, he had worked at Inha University for 30 years until he retired in 2021 with excellent positions of a distinguished fellow professor and dean of graduate school. Currently, he is a fellow of Korea Academy of Science and Technology (KAST), and The National Academy of Engineering of Korea (NAEK). His research is focused on control of various systems associated with smart materials: piezoelectric actuators and sensors, shape memory alloys, magnetorheological fluid and electrorheological fluid. He has published 650 SCI journal papers and is now serving as editors of several international journals including Smart Materials and Structures, Journal of Intelligent Material Systems and Structures, Sensors, and Scientific Report.