喷气织机高频喷射阀压电驱动器的动态特性

Dynamic characteristic of piezoelectric actuator for high frequency jet valve of air jet loom

为降低喷气织机的气耗量,设计了一种基于压电陶瓷的高频喷射阀。分析喷射阀压电驱动器的动态特性,建立压电驱动器的机电耦合模型;使用Matlab对系统进行时域和频域仿真,分析不同参数的数值变化对系统动态特性和振幅的影响;将仿真数据和测试结果进行对比,验证系统模型的有效性。结果表明:引纬工况下系统模型的阻尼比设定为0.71,等效质量为0.12 kg,负载刚度3 N/μm时,系统具有良好的动态特性和位移输出,减小了喷气织机无用气体的消耗。

In order to reduce the air consumption of air-jet loom,a high frequency jet valve based on piezoelectric ceramics was designed.The dynamic characteristics of jet valve piezoelectric actuator were analyzed,the electromechanical coupling model of piezoelectric actuator was established.Matlab was used to analyze the system in time and frequency domain.The effect of numerical changes of different parameters on the dynamic characteristics and amplitude of the system was analyzed.The simulation data and test results are compared to verify the effectiveness of the system model.The simulation results show that the damping ratio of the system model is set to 0.71,the equivalent mass is 0.12 kg,and the load stiffness is taken 3 N/μm,the system has good dynamic characteristics and displacement output,which greatly reduces the useless air consumption of air-jet loom.