摘要
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。
A three--translation vibration reduction platform is designed by using a 3--PCR paral- lel mechanism as main mechanism, which is used to settle the question of multi--DOF vibration reduc- tion. Basis on its kinematics analysis, the nonlinear vibration differential equations of mobile platform are established and solved by using Runge--Kutta method, and the simulation verification is carried out through ADAMS. According to the analysis of free vibration characteristics of the vibration reduc- tion platform without damping shows that the response period of principal damping direction is less than other directions under the same initial conditions, and the response period is related to the angle of system, increasing angle of system can noticeably decrease response period of the principal direction and increase response period of other directions at the same time. On the basis of the analysis of vibra- tion characteristics under the action of transient impact with damping, it shows that the damping effect of principal direction is superior to other directions, and increasing damping can effectively decrease the peak of response. This platform has obvious effect of vibration reduction.
出处
《机械传动》
CSCD
北大核心
2014年第3期23-26,共4页
Journal of Mechanical Transmission
关键词
多维减振
并联机构
振动特性
仿真
Multi--dimensional vibration reduction 3--PCR parallel mechanism Vibration characteristics Simulation
