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为实现多自由度减振,以3-PCR并联机构为主体机构构建三平移减振平台。在运动分析的基础上,建立了动平台的非线性振动微分方程,应用龙格-库塔数值分析方法求解,并通过ADAMS仿真验证。减振平台无阻尼自振分析表明,相同初始条件下主减振方向响应周期小于其他方向,减振平台响应周期与系统设计参数支承角相关,随支承角增大,主减振方向周期减小,其他方向周期增大;有阻尼瞬态冲击减振特性分析表明,主减振方向减振效果优于其他方向;增加阻尼可有效地抑制响应峰值。该减振平台具有良好的多维减振效果。
In order to realize the multi-degree of freedom vibration reduction, a 3-PCR parallel mechanism is taken as the main body to construct a three-translation vibration reduction platform. Based on the motion analysis, a nonlinear vibration differential equation of the moving platform is established and solved by Runge-Kutta numerical analysis method and verified by ADAMS simulation. The damped natural vibration analysis shows that under the same initial conditions, the response period of the main vibration damping is less than that of the other directions. The response period of the vibration-damping platform is related to the bearing angle of the system design parameter. With the increase of the bearing angle, the main vibration damping period decreases , And other periods increase. The analysis of the damped transient impact damping characteristics shows that the vibration damping effect of the main vibration damping direction is better than other directions; increasing the damping can effectively suppress the response peak. The damping platform has a good multi-dimensional damping effect.