自适应联动插拔机构建模与仿真

Modeling and Simulation of Adaptive Linkage Insert-Draw Mechanism

为了解决普通联动插拔机构装配困难和分离不畅等问题,设计了一种新型自适应联动插拔机构。建立了自适应联动插拔机构多体动力学模型,接触力采用非线性并联弹簧阻尼模拟,复位弹簧和浮动弹簧采用弹簧力模拟,弹体运动规律根据燃气发生器试车试验结果采用Akima插值方法建模。建立的模型和设计的装填分离装置验证了该插拔机构装填和分离的动态特性。结果表明:考虑浮动插头在水平方向浮动3 mm,在垂直方向浮动1 mm,以及绕三轴分别转动0.5°条件下,脱落插头都能顺利地自动装配和快速分离,满足性能指标要求。

In order to solve problems such as the assembly difficulty and poor separation of common linkage insert-draw mechanisms,a new type of adaptive linkage insert-draw mechanism was designed. A multi-body dynamics model of the mechanism was established. The nonlinear parallel spring-damper was adopted to simulate the contact force,and the return spring and floating springs was simulated with spring force. The motion of missile was built using Akima interpolation method based on the results of gas generator test. The dynamic loading and the separation performance of the mechanism were validated with the established model and the designed loading separation equipment. The results show that the pulloff plug can automatically assemble and rapidly separate with a consideration of pull-off plug floating 3 mm in the horizontal,1 mm in the vertical,and rotating 0. 5° of three-axis,which meets the performance requirements.