基于DOE及RSM的单线圈磁流变阻尼器优化设计及动力性能分析

设计了一种单线圈磁流变阻尼器,并推导其阻尼力数学模型.为使磁流变阻尼器在固定尺寸内得到最优性能,采用实验设计(design of experiments,DOE)和响应曲面法(response surface methods,RSM)相结合的方法得到磁感应强度与设计变量的近似响应函数,建立目标函数并求解得到最优几何参数.对单线圈磁流变阻尼器进行电磁场仿真和动力性能仿真;搭建动力性能测试试验台,分别测试优化前后阻尼器在不同电流、频率、振幅及速度下的动力性能.实验测试结果表明,优化前阻尼器最大输出阻尼力仅有253 N,优化后阻尼器的最大输出阻尼力可达560 N;优化前阻尼器最大可调范围为3.7,优化后阻尼器的最大可调范围为4.8,输出阻尼力随电流变化连续可调,具有良好的动力性能.

Optimal Design and Dynamic Performance Analysis of Single Coil Magnetorheological Damper Based on DOE and RSM

A single coil magnetorheological damper (MRD) was designed, and the mathematical model of damping force was also deduced. In order to obtain an optimal performance of the MRD under a fixed external dimension, the approximate response function of magnetic field density and design variables was obtained based on design of experiments (DOE) and response surface methods (RSM). The objective function was established to obtain the optimal geometric parameters of MRD. The electromagnetic field simulation and dynamic performance simulation was carried out, and the dynamic test rig was set up. The dynamic performances were investigated under different currents, frequencies, amplitudes and damper velocities. The experimental results show that the output damping forces can be continuously adjusted, which show a better dynamic performance. The maximum output damping force of the optimized MRD can reach 560 N, while the value of the initial MRD is only 253 N; the maximum adjustable range of the optimized MRD is 4.8, and the adjustable range of the initial MRD is only 3.7. The optimized MRD can achieve a better dynamic performance.