On real-time contour error estimation for contour following tasks

2006 ◽  
Author(s):  
Ming-Yang Cheng ◽  
Cheng-Chien Lee
Keyword(s):  
Real Time ◽  
Error Estimation ◽  
Contour Error ◽  
Contour Following

The model-free adaptive cross-coupled control for two-dimensional linear motor

2019 ◽  
Vol 42 (5) ◽  
pp. 1059-1069
Author(s):  
Baolin Zhang ◽  
Rongmin Cao ◽  
Zhongsheng Hou
Keyword(s):  
Adaptive Control ◽  
Real Time ◽  
Error Estimation ◽  
Tracking Error ◽  
Estimation Method ◽  
Linear Motor ◽  
Experimental Comparison ◽  
Contour Error ◽  
Two Dimensional ◽  
Model Free

In order to improve the contour error accuracy of two-dimensional linear motor, an improved cross-coupled control (CCC) scheme combining real-time contour error estimation and model-free adaptive control (MFAC) is proposed. The real-time contour error estimation method is based on CCC theory and coordinate transformation idea. It can accurately determine the contour error point of regular contour and avoid the influence of tracking error on the contour error. At the same time, for the design of two-axis error controller, only the input and output data generated by two-dimensional linear motor in reciprocating motion are used to design a multiple input multiple output-model-free adaptive control (MIMO-MFAC) algorithm, this algorithm avoids the dependence on accurate mathematical model and reduces the control difficulty. The experimental comparison showed that the proposed method improves the system tracking accuracy and contour accuracy, and verifies the proposed method correctness and effectiveness.

scholarly journals Cross-coupled control based on real-time Double Circle contour error estimation for biaxial motion system

2021 ◽  
Vol 54 (3-4) ◽  
pp. 324-335
Author(s):  
Li Bo ◽  
Wang Taiyong ◽  
Wang Peng
Keyword(s):  
Real Time ◽  
Error Estimation ◽  
Approximation Method ◽  
Control Strategy ◽  
Estimation Method ◽  
Contour Error ◽  
Motion System ◽  
Contour Machining ◽  
And Control ◽  
Error Estimation Method

In contour machining, contour error is a major factor affecting machining quality. In order to improve the performance of contour following, many control techniques based on real-time contour error estimation have been developed. In this paper, a Double Circle contour error estimation method is proposed. First, based on the kinematic information of the reference point on the command trajectory, five interpolation points closest to the actual point are obtained. Then the approximate contour error is obtained by employing the Double Circle approximation method. Compared with the common contour error approximation methods, the proposed method can achieve high precision approximation. In addition, according to the proposed contour error approximation method, the cross-coupled control strategy is improved. Experiments prove the effectiveness of the proposed estimation method and control strategy.

Sign in / Sign up

Export Citation Format

Share Document