基于电动机电流和EEMD的伺服旋转轴故障诊断技术研究  

Investigation on servo rotary axis fault detection based on motor current and EEMD

作　　者：周玉清[1] 徐宏伟[1] 黎玉刚[1] 母勇民[1] 

机构地区：[1]西安现代控制技术研究所,陕西西安710065

出　　处：《制造技术与机床》2015年第1期99-104,共6页Manufacturing Technology & Machine Tool

摘　　要：提出了一种基于交流伺服电动机电流和EEMD的伺服旋转轴故障诊断方法,研究了电动机电流测试原理,建立电流信息与故障的关联模型,提出了不同的电动机电流获取策略和电动机电流信息的位置及时间表达方法;并针对伺服旋转轴的运行特性,建立了典型的伺服旋转轴机械传动结构动力学模型,深入分析了采用EEMD对伺服旋转轴进行故障诊断的原理。试验结果表明:交流伺服电动机电流信息和EEMD方法用于伺服旋转轴机械传动部件故障诊断的可行性和有效性,从而为其在线监测和故障快速溯源,提供技术支撑。A kind of method to servo rotary axis fault detection based on motor current and EEMD is proposed. First, the test principle of servo motor current is profoundly investigated, then the mathematics mode between the fault and motor current is established, and the motor current acquisition approaches for the different motion control system is presented. Aiming at the operational characteristics of servo rotary axis, establish typical dynamic model, analyze the fault detect principle of servo rotary axis using EEMD. The results of the experiment show it is feasible and effective to use motor current and EEMD for servo rotary axis mechanic parts fault detections, which lays the foundation for its on-line condition monitoring and fault diagnoses,

关 键 词：伺服旋转轴 故障诊断 电动机电流 EEMD 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]