Design of multi-channel bypass magnetorheological damper with three working modes

The primary goal of this work is to design a novel magnetorheological damper with selectable performance parameters to improve the environmental adaptability of vibration systems equipped with such a damper and to provide a new idea for the design of magnetorheological dampers. The feasibility of the new idea is verified in both principle and experiment. The conceptual design, working principle analysis, magnetic design and prototype development of the magnetorheological damper are carried out. The damper prototype is tested on the dynamic testing system and the results show that the field-off force, peak force and dynamic range of the damper vary with the working modes, which proves that the performance parameters of the proposed damper are selectable during usage. Compared to conventional magnetorheological dampers, this new type of damper has a greater potential to achieve a large adjustment range. In addition, the damper can automatically switch the working channel in accordance with actual stroke, thus improving the response of the vibration system to unanticipated increasing loads.