中文摘要：

悬置阻尼和刚度可调对发动机在宽频范围内实现积极隔振具有重要意义。在建立发动机3自由度隔振模型基础上，提出用可调阻尼的磁流变阻尼器和可调刚度的磁流变弹性体构成磁流变并联悬置系统，以降低发动机对基座的垂向传递力和抑制横向动反力矩为目标，设计出用仿人智能思想在线修改参数的垂直隔振模糊自适应控制器，并对各磁流变并联悬置的刚度和阻尼进行协调控制。用Matlab对发动机整机隔振进行仿真，搭建出发动机隔振台架试验系统，在宽频激励条件下对不同悬置的隔振效果进行对比研究。仿真表明基于磁流变并联悬置的发动机隔振控制具有明显的优势，台架试验结果表明相对于橡胶和液压悬置，磁流变液悬置能在较宽频范围把力和力矩的绝对传递率降低到约30％以内，可提高乘坐舒适性。

英文摘要：

The mount with variable damping and stifsfues characteristics is very important for engine active isolation in whole frequency region. Based on building one engine isolation dynamic model with three degree of freedom, a magnetorheological （MR） parallel-mount system is proposed, which includes one MR damper with variable damping and one MR elastomer with variable stiffness. To decrease vertical force and cross moment transmitted from engine to base, a fuzzy adaptive controller is designed for vertical isolation, which can online adjust quantization factors and scale factor by human-simulation intelligent parameter modifying algorithm. And coordination control strategies are given to adjust damping and stiffness of each MR parallel-mount. Then the simulation isolation system of engine is developed in Matlab and the test-bed isolation system of engine is built in the laboratory. With wide frequency input, studies on different engine mount isolation are carried out. Simulation results indicate that MR parallel-mount has distinct advantages compared to other mounts. Laboratory results show that compared to rubber mount and hydraulic mount, MR fluid mount reduces absolute transfer coefficient of force and moment to less than 30 percents in a broader frequency region, which is very useful to enhance the ride comfort.