新型夹纱器压电驱动器的运动特性

为解决传统电磁夹纱器响应频率低、一致性差等问题,提出了基于压电技术设计新型夹纱器的新方法,并对其压电驱动器进行动态分析。首先对压电驱动器静态参数及影响端部位移的参数进行分析,得到其最佳夹持长度;随后建立悬臂式压电驱动器动力学模型并使用MatLab对系统进行仿真,分析了各个参数的数值改变对系统动态特性与稳定性的影响;最后搭建实验平台对压电驱动器进行测试,验证了压电驱动器的先进性。仿真和实验结果表明:驱动电压为150 V,频率为10 Hz,压电驱动器端部最大位移为1.49 mm左右,达到最大位移的系统响应时间稳定在1.6 ms;相比国内外电磁夹纱器,动态性能有了明显提高。

Kinematic characteristics of new piezoelectric actuator for yarn gripper in looms

Aiming at the low response frequency and poor consistency of the traditional electromagnetic yarn grippers, a new design of yarn grippers based on piezoelectric technology was proposed and its piezoelectric actuator was analyzed dynamically. The static parameters of the piezoelectric actuator and the parameters affecting the position shift of the piezoelectric actuator were analyzed, and the optimal holding length was obtained. The dynamic model of cantilever piezoelectric actuator was established and the system was simulated by MatLab. The influence of the numerical changes of each parameter on the dynamic characteristics and stability of the system was analyzed. Finally, an experimental platform was built to test the piezoelectric actuator, and the advance of the piezoelectric actuator was verified. The simulation and experimental results show that when the driving voltage is 150 V, the frequency is 10 Hz, the maximum displacement of the piezoelectric actuator end is 1.49 mm, and the response time of the system reaches the maximum displacement is stable at about 1.6 ms. Compared with the electromagnetic yarn grippers, the dynamic performance of the new piezoelectric actuator has been significantly improved.