汽车磁流变半主动座椅悬架动态特性的试验研究

摘要

For further improving vehicle ride comfort,a magneto-rheological damper for vehicle semi-active seat suspension is developed with its damping characteristic test conducted. After analyzing its force bearing condi-tion, a dynamics model for vehicle semi-active seat suspension is built, a corresponding skyhook control strategy is devised, and a simulation is performed on the skyhook control of seat under both random and sinusoidal excitation inputs. Meanwhile a physical prototype of semi-active seat suspension with magneto-rheological damper and its test bench system are developed with corresponding bench test carried out. The results indicate that the results of simu-lation basically well agree with test data and the magneto-rheological damper developed has a good damping control-lability. Compared to original passive seat suspension, the dynamic performances of vehicle semi-active seat with magneto-rheological damper are improved by some 30% with a significant effect of vibration attenuation.%为进一步提高汽车的乘坐舒适性，研发了一种汽车座椅半主动悬架用磁流变减振器，并对其进行阻尼特性试验，通过分析其受力情况，建立了汽车半主动座椅悬架动力学模型，设计了用于座椅磁流变半主动悬架的天棚控制策略，并在随机和正弦激励输入下进行了座椅天棚控制仿真计算，试制了磁流变半主动座椅物理样机及试验台架系统，开展了磁流变半主动座椅悬架的台架试验研究。结果表明，理论仿真和试验结果基本吻合，磁流变减振器阻尼可控性好；相对于被动座椅悬架，采用磁流变半主动座椅悬架后，座椅动态性能改善了30%左右，磁流变半主动座椅悬架减振效果显著。