Contour Tracking Fuzzy Control of XY Platform Driven by Two Axis High Precision Permanent Magnet Linear Motor
In order to reduce contour errors generated during contour tracking under high feedrate condi-tions,this paper proposes a control strategy that combines a PDFF(position-dependent feedforward)posi-tion controller with a fuzzy cross-coupling controller.Firstly,by adjusting the feedforward gain,the PDFF position controller can integrate the advantages of PDF control and PI control.Secondly,a contour error model based on a free-form curve is used to calculate the contour error,and a fuzzy cross-coupler is pro-posed that takes the position tracking error of two axes and the contour error as inputs to reduce the contour error during the contour tracking process.Finally,experimental results under no-load and load conditions demonstrate that compared to traditional cross-coupling structures,the proposed method effectively reduces the contour error of the XY platform under high feedrate conditions and improves the robustness of the con-tour tracking system.
contour errorlinear motorcross-coupled controlfuzzy control