A New Magneto-rheological Fluid Damper for High-mobility Multi-purpose Wheeled Vehicle (HMMWV)

摘要

This study focuses on the design, development, and testing of a new magneto-rheological fluid (MRF) damper for high-mobility multi-purpose wheeled vehicle (HMMWV). The new damper is designed to provide controllability while keeping the same geometrical dimensions as the original equipment manufacturer (OEM) damper. To design a fail-safe MRF damper, MRF behavior is simulated using the Bingham Plastic model, and the magnetic field distribution is obtained by a three-dimensional electromagnetic finite element analysis. A fail-safe MRF damper is referred to one which retains a minimum damping capacity comparable to that of OEM damper in the event of a power supply or electronic system failure. The proposed MRF damper is designed to achieve non-symmetrical force characteristics with different force responses at rebound and compression phases. Theoretical predictions and experimental results are presented for the force-displacement and force-velocity behaviors of the damper under different input motions, various magnetic fields, and different MR fluids.