波纹管驱动超精密定位平台建模及复合控制

为提高超精密定位平台的行程和精度,设计了一种新型的气动伺服定位平台。金属波纹管为单级驱动机构,采用有限元法设计气浮导轨。以气浮导轨支撑,研究无摩擦条件下的较大行程和精密控制。结合实验数据对波纹管的机械特性进行分析。根据初载曲线,进行参数辨识,建立了基于PI模型的定位平台系统迟滞模型,并对模型进行了验证。为改善系统动态特性,设计了复合控制器。前馈控制基于PI逆模型进行设计,反馈控制采用数字PID控制,并通过粒子群算法进行参数优化。对系统分别进行阶跃响应,锯齿波和正弦波跟踪实验。结果表明,参数优化后,系统阶跃响应的定位精度达到50 nm,平均跟踪误差,锯齿波输入为0.12μm,正弦波输入为0.18...

Full description

Saved in:
Bibliographic Details
Published in电机与控制学报 Vol. 18; no. 7; pp. 94 - 100
Main Author 田艳兵 王涛 王美玲 张栋
Format Journal Article
LanguageChinese
Published 北京理工大学 自动化学院,北京,100083%青岛理工大学 自动化工程学院,山东 青岛,266520 2014
Subjects
前馈控制
气动驱动器
粒子群算法
精密工程
迟滞
precision engineering
精密工程
气动驱动器
粒子群算法
前馈控制
feedforward control
particle swarm opti-mization
迟滞
hysteresis
pneumatic drive
Online AccessGet full text
ISSN1007-449X

Cover

More Information
Summary:为提高超精密定位平台的行程和精度,设计了一种新型的气动伺服定位平台。金属波纹管为单级驱动机构,采用有限元法设计气浮导轨。以气浮导轨支撑,研究无摩擦条件下的较大行程和精密控制。结合实验数据对波纹管的机械特性进行分析。根据初载曲线,进行参数辨识,建立了基于PI模型的定位平台系统迟滞模型,并对模型进行了验证。为改善系统动态特性,设计了复合控制器。前馈控制基于PI逆模型进行设计,反馈控制采用数字PID控制,并通过粒子群算法进行参数优化。对系统分别进行阶跃响应,锯齿波和正弦波跟踪实验。结果表明,参数优化后,系统阶跃响应的定位精度达到50 nm,平均跟踪误差,锯齿波输入为0.12μm,正弦波输入为0.18μm,能够满足超精密定位的要求。
Bibliography:23-1408/TM
TIAN Yan-bing, WANG Tao, WANG Mei-ling, ZHANG Dong （ 1. School of Automation, Beijing Institute of Technology, Beijing 100083, China; 2. Automation Engineering College, Qingdao Technological University, Qingdao 266520, China）
In order to improve the stroke and precision of the ultra-precision positioning stage, a new type of pneumatic servo positioning stage was designed. Air bearing sliders were designed by finite element method and metal bellows were used as the single driving device in the positioning stage. The stage was supported by aerostatic sliders to realize large stoke and ultra-precision positioning. The mechanical char-acteristics of bellows were analyzed with the experimental data. According to the initial loading curve, the parameters were identified to establish the PI hysteresis model of the system, and the model was validated by the experiments. In order to improve dynamic performance of the system, a compound control scheme was designed. In this scheme,a feedforward controller was b
ISSN:1007-449X