Sensor-based deflection modeling and compensation control of flexible robotic manipulator

Abstract A sensor-based technique is proposed for the modeling and control of the manipulator positioning errors caused by structural deflections of the flexible links. A laser–optical sensor system is specially designed for measuring the deflections of each flexible link, and the robot positioning inaccuracies are thus deduced through the link deflections measured and, finally, compensated for in real time by adjustment of the joint variables. The principle of measurement is described, the sensor-based modeling and compensation algorithms of the robot positioning errors are presented, and the simulation results are given in the paper.

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