Multi-objective optimization design for a magnetorheological damper

Abstract

As one of the most important components in the semi-active damping system, the performance of MR damper directly determines the damping capacity of the damping system. In order to make the damping system has excellent damping effect, it is necessary to optimize the working performance of the MR damper. Therefore, Non-Dominated Sorting Genetic Algorithm version II (NSGA-II) was applied to optimize the structure of MR dampers in this paper. Firstly, the structural scheme of MR damper was proposed. Secondly, the design principle of MR damper was described, and the magnetic circuit material and MR fluid were selected. Thirdly, taking the maximum dynamic range and the minimum number of turns of electromagnetic coil as the optimization objective, the structure of MR damper was optimized by NSGA-II. The structural parameters of MR damper were determined in the Pareto optimal solution set based on the principle of minimum mass. Finally, through the magnetic simulation and the performance testing of the MR damper, it was verified that the MR damper has reasonable magnetic circuit and excellent performance. And the design results meet the requirements. The proposed optimization method can provide a theoretical basis for the optimal design of related damping devices.

Design and dynamic performance research of MR hydro-pneumatic spring based on multi-physics coupling model

“…The working mode of the MR hydro-pneumatic spring damping structure is the shear-valve mode. According to the flow field analysis of the MR damper, the calculation model of the damping force of the shear-valve MR damper can be applied to the calculation model of the valve MR damper, as shown in Equation ( 2) [19].…”

“…Where,  denotes shear stress;  denotes shear rate; ρ m denotes model parameter. Based on the design method in my previous research on MR damper design [19], main structural parameters of MR hydro-pneumatic spring damping structure are designed, as shown in Table 3. In order to ensure the reliability of damping force, in the actual calculation process, the critical shear stress of MR fluid is taken as 20kPa.…”

“…According to Equation ( 14), Equation (17) and Equation ( 18), the internal flow field analysis model of the MR hydro-pneumatic spring damping structure can be obtained, as shown in Equation (19).…”

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

“…The distinctive characteristics of MR fluids have found application in various devices, where the absence of moving parts is an important advantage (Eshgarf et al, 2022; Zhu et al, 2012). Some examples include light-weight, semi-active damping devices for miscellaneous applications (Jiang et al, 2022), damping systems for ground vehicles with high dynamic range and low stroking load (Bai et al, 2013), or even MR dampers used in prosthetic limbs (Nordin et al, 2022).…”

Design and experimental research of stepped bypass magnetorheological damper

“…For the design of magnetorheological damper coils, some researchers study the magnetorheological damper with three coils and propose a mathematical model applicable to the magnetorheological damper with three coils, which provides information for the design and analysis of future magnetorheological dampers with multiple coils (Yang et al, 2021). For the optimization of magnetorheological dampers, the researchers used multi-objective optimization design to optimize the structure and used the most reasonable parameters in each parameter to improve the performance of the magnetorheological dampers (Huina et al, 2021; Jiang et al, 2022a). There are also researchers who have designed and optimized a new MR damper based on B-spline curve and designed and produced a damper that is better in all aspects than the prototype from previous work (Liu et al, 2021b).…”