发动机电致伸缩液压悬置隔振特性的仿真研究

Simulation of Vibration Characteristics of Active Controled Hydraulic Mount with Electrostrictive Actuator

一种采用电致伸缩作动器的主动悬置。采用Matlab软件建立了它的仿真模型,模型中考虑了包括惯性通道、解耦通道及电致伸缩作动器的非线性。选择滤波后的x-LMS算法作为控制算法,通过仿真计算研究该悬置的隔振性能。研究结果表明,采用主动控制能有效的改善悬置的隔振性能。文中采用查表的办法由控制位移求解控制所需要的电压,消除了作动器非线性对系统性能的影响。

An active engine mount with electrostrictive actuator was studied. Its simulation model was built using Matlab, and the nonlinear characteristics of inertia track, decoupler, and electrostrictive actuator was considered in this model. An adaptive controller using the filtered-X LMS algorithm was selected to cancel the force transmitted from the engine to body through the active mount in this simulation. The simulation results show that vibration transmitted from the engine to the body can be reduced greatly. The control voltage applied in actuator was calculated by table looking, and by this method and the influence of electrostrictiv.e nonlinear on system isolation characteristics was canceled.