三维编织机运动仿真分析及其轨道优化设计

摘要

为研究旋转式三维编织机携纱器在零部件编织过程中的运动情况,以便对携纱器的运动和接触进行分析,了解其对编织后的复合材料性能的影响,通过分析建立携纱器运动的理论公式,利用MatLab软件绘制携纱器的理论运动曲线,并在SolidWorks中建立三维编织机简化后的虚拟样机分析模型,应用ADAMS软件进行运动和动力学仿真.对比理论与仿真的曲线发现,携纱器在过渡阶段出现尖点,存在较大的加速度,产生接触冲击,对编织的效果造成不良影响,进而进行携纱器运动轨道的优化设计.通过导入虚拟样机软件仿真后发现,优化后的携纱器速度曲线过渡平缓,圆滑,无尖点,且过渡处加速度小,从而减小了冲击,降低了磨损率.%This study intends to research the movement of the yarn carrier of a rotary three-dimensional braiding machine in the braiding process of the parts so as to analyze the motion and contact of the yarn carrier,and to understand the impact on the performance of the braided composites.To establish the theoretical formula of carrier by analyzing,using MatLab software to draw the movement theory curve of the yarn carrier,and to establish the virtual prototype analysis model of the three-dimension braiding machine simplified,and the kinematics and dynamics simulation was applied on it with the software of ADAMS.Comparison between theory and simulation curve shows that a sharp point appears in the transition phase of the carrier,and hence a large acceleration exists,which results in contact impact effect to the weaving.The optimal design of trajectory for the yarn carrier is then carried ou a bad.Through the simulation by introducing virtual prototype software,it is shown that optimized speed curve is slow and smooth in transition without a tip point,and the acceleration at the transition is small,therefore it reduces the impact and wear rate.