基于并联机构多自由度减振平台仿真与测试研究

Simulation and Testing Study of the MDOF Vibration Damping Platform Based on Parallel Mechanism

为了解决许多重大工程领域中的多自由度减振问题,本文针对橡胶具有多自由度弹性阻尼减振特性,但容易老化,失去弹性的特点,采用并联机构作为组合弹性阻尼减振装置主体结构,在机构原动件处辅以弹性阻尼装置,运用反向自适应原理,模拟橡胶实现减振;同时按照给定减振要求,用ADAMS软件建立系统模型和仿真,并制作了试验样机。将仿真和试验结果进行分析比较,结果表明动态模拟与试验结果一致,从而说明了基于并联机构组合弹性阻尼减振装置设计理论的正确性和可行性,可推广解决其它多自由度减振问题。

In order to resolve the problem of multi-degree-of-freedom （MDOF） vibration damping in many key engineering, rubber is usually used as vibration damping materials, but rubber has multi-degree-of-freedom （MDOF） viscous-elastic properties, but it is easy to lose elasticity quickly after prolonged exposure to air. Using parallel mechanisms as major structure of the damping mounting, adding spring-damping device at the driving link, applying inverse-adaptive method, a multi-direction vibration damping platform was set up by simulating rubber, which realizes multi-direction vibration damping. With certain damping request, the damping system was set up and simulated with ADAMS software, and the prototype of system was designed. The result of numerical simulation was compared with the experimental result, it is shown that the design of multi-direction vibration damping platform based on parallel mechanism is correct, it can be applied in the design of other multi-direction vibration damping system.