基于机床进给伺服系统中频振动抑制研究  

Research on the Mid-frequency Vibration Suppression for Machine Feed Servo System

作　　者：官鹏飞 区均灌 李慧颖 GUAN Pengfei;OU Junguan;LI Huiying(Guangdong Key Laboratory of High Performance Servo System Enterprises,Zhuhai Guangdong 519000,China;Zhuhai Gree Electric Co.,Ltd.,Zhuhai Guangdong 519000,China)

机构地区：[1]广东省高性能伺服系统企业重点实验室,广东珠海519000 [2]珠海格力电器股份有限公司,广东珠海519000

出　　处：《机床与液压》2023年第19期92-98,共7页Machine Tool & Hydraulics

基　　金：广东省高性能伺服系统企业重点实验室(2020B121202017)。

摘　　要：伺服系统以其高性能、高精度等优势被广泛应用于数控机床和机器人上。机床进给伺服系统中由于滚珠丝杠等传动装置刚度有限,柔性连接方式易引发振动而影响其稳定性与精度。针对旋转进给伺服系统中存在的中频振动,提出一种基于二阶状态观测器的速度扰动观测补偿中频振动抑制方法,由速度观测器观测出的速度与实际速度反馈相减,通过带通滤波提取振动信号,作为补偿给到速度反馈上,抵消系统振动,提高系统带宽并保持稳定性和精度。最后在不同的速度环增益下,通过仿真和实验验证了所提方法的有效性。Servo system is widely used in NC machine tools and robots because of its high performance,high precision and other advantages.Due to the limited stiffness of the drive devices such as ball screw in machine tool,the flexible connection of the feed servo system is prone to cause vibration,which affects its stability and accuracy.Based on second-order state observer,a mid-frequency vibration suppression method with observational compensation for velocity disturbance was presented for the rotating feed servo system.The velocity observed by the speed observer was subtracted with the actual speed feedback,and the vibration signal was extracted by band-pass filter as compensation to the speed feedback,by which the system vibration was canceled,so the system bandwidth was improved and stability and accuracy were maintained.Finally,the validity of the proposed method is verified by simulation and experiment under different speed ring gains.

关 键 词：速度观测器 振动抑制 进给伺服系统 双惯量系统 

分 类 号：TM921[电气工程—电力电子与电力传动]