＜正＞A methodology for CAD-directed measurement of freeform surface using a coordinate measuring machine equipped with a touch-trigger probe is presented,mainly including adaptive sampling of measurement points and registration of freeform surface.The proposed sampling method follows four steps: Freeform surface is fitted by bi-cubic B-spline; Curvedness measure of the surface is computed; Given a number of sampling points,an iterative algorithm is constructed for selecting a set of measurement points by employing the curvedness information; The measurement points is regularized for tradeoff between maximizing the measurement accuracy and minimizing the sampling time and cost.The aforesaid algorithm is demonstrated in term of a marine propeller blade.An offset surface registration method is presented to improve alignment accuracy of freeform objects,and Monte Carlo simulation is conducted to verify the effectiveness of the method.
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机译：Findings from Dalian University of Technology Provide New Insights into Robotics (Tool Orientation and Redundancy Integrated Planning Method Constrained By Stiffness for Robotic Machining of Freeform Surfaces)
机译：Investigators from Dalian University of Technology Report New Data on Robotics (Path, Feedrate and Trajectory Planning for Freeform Surface Machining: a State-of-the-art Review)
