321 Design of the contour error vector cross-coupling control for nonlinear contouring

2003 ◽  
Vol 2003 (0) ◽  
pp. 529-534 ◽  
Author(s):  
Myung Hoon Lee ◽  
Seung Han Yang
Keyword(s):  
Cross Coupling ◽  
Contour Error ◽  
Error Vector ◽  
Cross Coupling Control

Cross-Coupling Controller for Five Degree-of-Freedom Coplanar Nanostage

2013 ◽  
Vol 284-287 ◽  
pp. 1788-1793
Author(s):  
Van Tsai Liu
Keyword(s):  
Tracking Control ◽  
Tracking Error ◽  
Cross Coupling ◽  
Degree Of Freedom ◽  
Creep Model ◽  
Contour Error ◽  
Viscoelastic Creep ◽  
Control Scheme ◽  
Optimization Parameters ◽  
Cross Coupling Control

The proposed approach is to design a tracking controller for five degree-of-freedom coplanar nanostage which can provide high precision applications. This study propose a viscoelastic creep model, it was modeled as a series connection of springs and dampers to describe the creep effect. Then, utilize a PI controller using Taguchi method to search the optimization parameters to suppress the tracking error. Finally, a cross-coupling control scheme is proposed to eliminate the contour error which is typical in dual-axes tracking control problem. The developed approaches are numerically and experimentally verified which demonstrate performance and applicability.

New Cross-Coupling Control of Independent Linear Contour Errors Based on Backlash

2010 ◽  
Vol 663-665 ◽  
pp. 902-905
Author(s):  
Sheng Bao Wang ◽  
Xiao Hong Liu
Keyword(s):  
Error Control ◽  
Cross Coupling ◽  
Contour Error ◽  
Contour Tracking ◽  
Control Scheme ◽  
New Strategy ◽  
Cross Coupling Control ◽  
Simulation Results ◽  
Contour Machining ◽  
Contour Error Control

On the basis of analysis of linear contour errors model, a new strategy of independent contour error control was presented for high precision contour machining. The proposed control scheme, in which the equations of the well-known cross-coupling controller were implemented, is shown to be able to diminish the linear contour error without using any cross-feeding signals between the driving axes. The simulation results show that the proposed control scheme is effective and that better effect of the contour tracking can be obtained. As a result, the contour machining precision is improved greatly.

Variable-Gain Cross Coupling Control for Linear Motor X-Y Table Based on Genetic Algorithm

2011 ◽  
Vol 383-390 ◽  
pp. 7104-7110
Author(s):  
Li Mei Wang ◽  
Yue Pang
Keyword(s):  
Genetic Algorithm ◽  
Cross Coupling ◽  
Contour Error ◽  
Local Optimum ◽  
Variable Gain ◽  
Optimal Value ◽  
Cross Coupling Control ◽  
Global Optimal ◽  
Contour Accuracy ◽  
Coupling Error

To achieve high precision contour tracking control for Permanent Magnet Linear Synchronous motor drive X-Y table, genetic algorithm was used on PID controller parameters optimized. By the ability of gene mutation, the parameters were avoided falling into local optimum point. Consequently, the global optimal value can be found directly. Variable-gain cross coupling controller was used to compensate X-Y axis coupling error. Eventually the path tracking contour error is greatly reduced to the expected accuracy limits. Theoretical analysis and simulation results show that the designed control system make X-Y table possess high contour accuracy

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