比例电磁阀内置式CDC减振器设计与验证

Design and Validation of a CDC Damper with a Built-in Proportional Valve

设计了一种比例电磁阀内置式连续阻尼可调(Continuously Damping Control,CDC)减振器,分析了其主要结构组成及工作原理,并基于流体力学建立了参数化仿真模型。通过仿真和试验的方法获得了该CDC减振器的示功特性曲线和速度特性曲线,并从2组特性曲线的形态变化来分析了其阻尼特性的可调范围和调节特点。结果表明:仿真和试验结果相对误差小于10%,仿真模型准确有效;该CDC减振器的阻尼力随着激励电流的增大而减小,这种减小趋势的速率随着激励电流的增加先增大后减小;速度特性曲线的斜率在“拐点速度”之前逐渐变大,在“拐点速度”之后基本不变,且随着激励电流的增大而逐渐减小;该CDC减振器在复原行程的阻尼力可调范围为1544~4914 N,压缩行程的阻尼力可调范围为-1415~-1937.7 N。

A continuously damping control(CDC)damper with a built-in proportional valve was designed and introduced,the damping mechanism was introduced and damping force simulation model was built.To validate the correctness of simulation model,the damping force-stroke characteristics and force-velocity characteristics were obtained through simulation and physical samples measurements.Results shown that,there is a good consistency between simulation and testing due to the deviation in damping characteristics is less than 10%.The damping force were decreased by the increasing of excitation current,and the change speed of this change trendy is from positive to negative.Force-velocity characteristics shown that the slope of damping curve increased before“knee velocity”,but kept in linear after“knee velocity”.Damping force can be tuned from 1544 N to 4914 N in rebound stroke,and tuned from-1415 N to-1937.7 N in compression stroke.