Design and vibration control of military vehicle suspension system using magnetorheological damper and disc spring

Abstract

This paper proposes a new type of magnetorheological (MR) fluid based suspension system and applies it to military vehicles for vibration control. The suspension system consists of a gas spring, a MR damper and a safety passive damper (disc spring). Firstly, a dynamic model of the MR damper is derived by considering the pressure drop due to the viscosity and the yield stress of the MR fluid. A dynamic model of the disc spring is then established for its evaluation as a safety damper with respect to load and pressure. Secondly, a full military vehicle is adopted for the integration of the MR suspension system. A skyhook controller associated with a semi-active actuating condition is then designed to reduce the imposed vibration. In order to demonstrate the effectiveness of the proposed MR suspension system, a computer simulation is undertaken showing the vibration control performance of such properties as vertical displacement and pitch angle, evaluated for a bumpy road profile.

Mathematical modeling and experimental evaluation of a prototype double-tube Magnetorheological damper

“…MR fluids have lower yield shear strength, lower-temperature range, and higher energy consumption compared to their counterparts. Regarding these characteristics, MR fluid is replaced with ER fluid after almost one decade from discovering of ER fluids [12][13][14]. Ferro fluids, discovered in 1960s, are actually a colloidal suspension of nanoparticle distributed uniformly in the carrier fluid (based fluid) and surrounded by a special surfactant.…”

Active control of a nonlinear suspension with output constraints and variable-adaptive-law control

“…The optimal control force could be computed by tracking the idealized model using a controller designed in [5,6]. A special MR damper was developed in [7], and the sky-hook algorithm was used to reduce the vibration acceleration of the entire vehicle. An MR damper was also used in a train in [8], and the H-infinity algorithm served to control the vibration.…”

Static and Dynamic Experiment Evaluations of a Displacement Differential Self-Induced Magnetorheological Damper

“…It potentially offers highly reliable operation and can be viewed as fail-safe in that it becomes passive damper if the control hardware is out of work [5][6][7]. Due to its fast adjustable response, long range of controllable damping force, simple structure, long durability, and low energy consumption, MRD has been widely used in the semiactive vibration control systems and vibration reduction systems such as automotives [8,9], building and bridge vibration attenuation [10][11][12], and other semiactive vibration isolation systems [13,14]. To effectively reduce the influence of vibration force on these structures, the MRD semiactive vibration control system chooses a closed-loop control to these structures through the changing of controllable damping force under a direct current generated by the controller system according to the signal of force sensor and the response of displacement sensor.…”