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为实现宽频范围内对发动机振动进行积极隔振,提出一种混合模式的磁流变悬置结构,利用有限元软件ANSYS分析结构在不同电流下的磁场分布,从而得到悬置输入电流与悬置输出阻尼力的关系;同时,建立磁流变悬置系统6自由度模型,设计LQR控制器和模糊控制器对磁流变悬置系统进行隔振。仿真结果表明:LQR控制器和模糊控制器均能较好地在宽频范围内衰减发动机振动;与模糊控制器相比,LQR控制器具有更好的隔振效果。
In order to realize the active isolation of the engine vibration in the wide frequency range, a mixed mode MR damper suspension structure is proposed. The magnetic field distribution of the structure under different currents is analyzed by the finite element software ANSYS so as to obtain the suspension of the input current and suspension Output damping force; at the same time, the establishment of 6-degree-of-freedom MRD model system, the design of LQR controller and fuzzy controller magnetoresistive suspension system vibration isolation. The simulation results show that the LQR controller and the fuzzy controller can attenuate the engine vibration better in the wide frequency range. Compared with the fuzzy controller, the LQR controller has a better vibration isolation effect.