摩擦参数对压电执行器振动特性的影响

提出了一种考虑运动学和振动解的摩擦振动模型，并用迭代法求解了压电执行器在运动体摩擦力作用下的振动响应.通过数值模拟和参数分析研究了运动体的速度v，正压力F_○N，相对滑动速度控制系数的延迟率C，静摩擦系数μ_○S及其下限μ_D，阻尼比ξ对于动态摩擦力和振动特性的影响趋势.结果表明压电堆的振幅随着F_○N，v，μ_S和C的增加而变大，随着μ_D和ξ的增加而减小.F_N和μ_S影响最大静摩擦力，μ_○D影响滑动摩擦力，v和C对黏着状态与滑动状态的转换以及摩擦状态转换过程中摩擦力的变化有明显的影响.

Influence of Friction Parameters on Vibration Characteristics of Piezoelectric Actuator

A friction vibration model considering kinematics and vibration solution was proposed， and the vibration response of a piezoelectric actuator under friction force from a moving object was solved by the iterative method. The influences of the moving object velocity v， normal pressure F_○N， delay rate of relative sliding velocity control coefficient C， static friction coefficient μ_○S and its lower limit μ_○D，damping ratio ξ on the dynamic friction force and vibration characteristics were studied by numerical simulation and parameter analysis. The results showed that the amplitude of the piezo electric stack increases with the rise of F_N， v， μ_S and C， and decreases with the increase of μ_D and ξ.F_N and μ_S affect the maximum static friction， μ_D affects the sliding friction， v and C obviously affect the transformation between the sticking and sliding friction status and the friction force variation during the conversion of friction status.