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Reduction of contour error is the main control objective in contour-following applications. A common approach to this objective is to design a controller based on the contour error directly. In this case, the contour error estimation is a key factor in the contour-following operation. Contour error can be approximated by the linear distance from the actual position to the tangent line or plane at...
Recent work recognizes that cross-coupled control (CCC) can improve the accuracy of contour tracking in biaxial systems evidently. In this paper, a structure, ejecting the cross compensated control effort into the position input directly, is proposed. In order to obtain the cross-coupling gains, an approach for contour error approximation to arbitrary regular curve is set up. Furthermore, it turns...
Recent work recognizes that cross-coupled control (CCC) can significantly improve the accuracy of contour tracking in biaxial systems. However, it's complicated to apply CCC to arbitrary contour because of extra requirements to calculation and switching the cross-coupled gains. In addition, since most of CCC are based on the PID controlled loops of the individual axes, performances are conserved in...
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