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1. 中国科学院 光电技术研究所,四川 成都,610209
2. 中国科学院 研究生院 北京,100039
3. 中国科学院 自适应光学重点实验室,四川 成都,610209
收稿日期:2012-02-10,
修回日期:2012-03-05,
网络出版日期:2012-06-10,
纸质出版日期:2012-06-10
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王俐, 饶长辉, 饶学军. 压电陶瓷微动台的复合控制[J]. 光学精密工程, 2012,20(6): 1265-1271
WANG Li, RAO Chang-hui, RAO Xue-jun. Feed-forward control of piezoelectric ceramic positioning stage[J]. Editorial Office of Optics and Precision Engineering, 2012,20(6): 1265-1271
王俐, 饶长辉, 饶学军. 压电陶瓷微动台的复合控制[J]. 光学精密工程, 2012,20(6): 1265-1271 DOI: 10.3788/OPE.20122006.1265.
WANG Li, RAO Chang-hui, RAO Xue-jun. Feed-forward control of piezoelectric ceramic positioning stage[J]. Editorial Office of Optics and Precision Engineering, 2012,20(6): 1265-1271 DOI: 10.3788/OPE.20122006.1265.
压电陶瓷微动台的迟滞非线性严重影响其动态定位精度
为了解决这一问题
采用一种改进的PI模型对微动台的迟滞非线性进行了建模。为了提高传统PID算法对压电陶瓷微动台的动态定位性能
将改进的PI模型与传统PID算法组合构成前馈复合控制算法
并进行了微动台的慢速与快速动态定位实验。结果表明
对同频曲线定位时
前馈PID复合算法的最大误差为传统PID算法的40%左右
平均误差为传统算法的20%~30%左右;对多频曲线定位时
前馈PID复合算法的最大误差和平均误差为传统PID算法的33%左右。数据表明前馈PID复合算法的动态定位性能明显优于传统PID算法。
As the nonlinear hysteresis of a piezoelectric ceramic positioning stage affects its dynamic positioning precision badly
this paper proposes a model for the piezoelectric ceramic hysteresis based on a modified PI hysteresis model. In order to improve the dynamic positioning precision of the piezoelectric ceramic positioning stage based on traditional PID algorithm
the feed-forward control is constituted with the modified PI inverse hysteresis model and a traditional PID
and the experiments on slow speed and high speed positionings are performed. Experimental results show that the maximal error and mean error of the feed-forward controller are 40% and 20%-30% that of traditional PID algorithm for tracking single frequency trajectory.For multi-frequency trajectory tracking
the feed-forward controller has better dynamic control effect
and both maximal error and mean error are almost 33% that of traditional one.These data indicate the availability of the feed-forward control algorithm.
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