精密数控分度转台的控制系统设计  

Design of Control System for High Precision Time Grating NC Rotary Table

作　　者：杨继森[1] 万文略[1] 郑方燕[1] 张天恒[1] 

机构地区：[1]重庆理工大学机械检测技术与装备教育部工程研究中心,重庆400050

出　　处：《仪表技术与传感器》2010年第7期95-98,共4页Instrument Technique and Sensor

基　　金：国家自然科学基金项目(50805150);重庆市科技攻关重大项目(CSTC2006AA3010)

摘　　要：融合了时栅传感器测量技术的高精度时栅分度转台,在实际应用过程中出现了因定位精度高,人工很难一次性准确分度定位。针对该问题,利用高性价比的ARM嵌入式处理器,设计开发了一套基于时栅分度转台的自动分度定位控制系统。该系统采用步进电机作为驱动装置,利用转台中嵌入的高精度时栅角位移传感器的角位移测量数据作为反馈,构成闭环控制,采用分段控制、逐步逼近的控制算法,达到高速、高精度分度定位的目的。实际应用表明:该控制系统的分度定位精度达到±2″。The high precision time grating rotary table was used in the machining indexing.But it is generally difficult to use the time grating worktable to index accurately by turning the handwheel of rotary table in second scale,and it is necessary to adjust and index in the process.It has great influence on the work efficiency.For solving the problem,one time grating NC rotary table system was designed and developed with the high advanced embedded processor ARM.The step motor is the driving equipment,and the angular measuring data from the high precision time grating sensor embedded in the rotary table was used as the feed control information to construct one closed-loop control system.The control algorithm of segmentation control and successive approximation was used to index high precision and high speed in the closed-loop control system.The application conforms that the indexing precision of the control system reaches ±2″.

关 键 词：时栅 ARM 分度转台 嵌入式 闭环控制 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]