Development and experimental characterization of a large-capacity magnetorheological damper with annular-radial gap

Abstract

Magnetorheological (MR) dampers with bypass arrangements and combined annular-radial fluid flow channels have shown superior performance compared with those conventional MR dampers with single annular/radial fluid flow gaps. Achieving a higher controllable dynamic force range with low off-state but high on-state damping force is yet a significant challenge for the development of MR dampers for high payload ground vehicle suspensions. This paper presents the conceptual design, fabrication, and experimental characterization of a mid-sized large-capacity MR damper equipped with a compact annular-radial MR fluid bypass valve. Extensive experimental tests were conducted to investigate the dynamic characteristics of the proposed MR damper considering wide ranges of excitation frequency, loading amplitude, and electrical current. The equivalent viscous damping together with the dynamic range were calculated as functions of loading conditions considered. The proposed damper initially realized the maximum dynamic range and damping force of 2.3 and 5.54 kN, respectively. Modification of the MR valve design permitted the maximum dynamic range and damping force to substantially increase to 5.06 and 6.61 kN, respectively. The effectiveness of the proposed MR damper was subsequently identified by comparing its dynamic range with other conventional MR dampers in previous studies. The results confirmed the superior performance of the proposed MR damper and its potential application for highly adaptive suspension systems for off-road wheeled and tracked vehicles.

Design optimization and experimental evaluation of a large capacity magnetorheological damper with annular and radial fluid gaps

“…The aim is to replace the passive shock absorber with an MR damper having large dynamic range and stroke to reduce the vehicle vibration under a wide range of loading circumstances. Therefore, the vehicle dynamic and maneuverability will be improved, as suggested in other studies (Abdalaziz et al, 2022; Ata, 2014; Deo and Suh, 2005; Els et al, 2007; Long and Comito, 1979).…”

“…The experimental measurements were performed for measuring force-displacement and force-velocity of the MR damper at low frequencies (1 and 2 Hz) and amplitudes of 1 mm respectively and under different excitation currents (0–2 A). The detailed experimental characterization is provided in Abdalaziz et al (2022).…”

Performance evaluation of a novel squeeze mode magnetorheological fluid damper with pre-compression mechanism under small amplitude and medium-high frequency

“…In order to further analyze the high frequency hardening effect, the energy dissipated per cycle E has been used to validate the improvement. The energy dissipation is the area enclosed in the force-displacement loop (Abdalaziz et al, 2022). It can be shown as…”

Modeling and experimental study of a miniaturized magnetorheological valve with high performance

“…As a result, they discovered utility mainly in the automotive industry for suspension systems. Abdalaziz et al (2022) and Bai et al (2013) proposed the design and experimental validation of MR dampers for ground vehicles focusing on dynamic range and damping force increase. Makowski and Knap (2018) studied suspension control algorithms for MR damping systems.…”