【摘要】 设计了基于混合工作模式的微型汽车磁流变减振器,讨论了结构参数对磁流变减振器阻尼力和可调系数的影响。提出了基于磁路设计的结构优化方法,对磁流变减振器的一些关键尺寸进行优化、计算,以确保各部分磁化工作点接近于饱和工作点,阻尼通道处的磁场强度达到设计要求,且磁响应时间最短。电磁有限元计算结果验证了磁流变减振器的磁路设计。应用磁路优化设计方法设计、制造了3个原型磁流变减振器,并完成了台架试验。试验验证了理论模型的预测,表明磁路优化设计方法是正确和有效的。磁路优化设计方法能够使磁流变减振器的结构更加紧凑,能量利用率更高,调节范围增大,响应速度加快。更多还原

【Abstract】 As a key actuator in a semi-active suspension system from the vehicle,the optimization design of the Megneto-Rheological damper becomes more and more important.It can improve the performance of the MR damper and make it more compact and effective.The electromagnetic design methodology is presented and the optimization design of a MR damper for a mini-bus is performed.Some important parameters such as the outer radius of the casting and the radius of the coil core are determined by the electromagnetic design methodology so that the magnetic flux density distribution in different areas is more reasonable and no magnetic saturation occurs in these areas.At the same time,the cross-sectional area of the magnetic pole is minimized and the coil is divided into two coils in order to improve its response characteristics.Electromagnetic finite element analysis verifies the effectiveness of the magnetic circuit design for the MR damper.Three prototype MR dampers are manufactured and characterized to identify the effectiveness of the electromagnetic design methodology.The MR damper optimized by the proposed methodology demonstrates much better performances than the MR damper designed by the conventional method which doesn’t consider the electromagnetic properties of the magnetic circuit adequately.At last,the effectiveness is identified by a series of experiments.更多还原