応答曲面法によるパラレルメカニズム型加工機のキャリブレーション(機械要素,潤滑,設計,生産加工,生産システムなど)

概要

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This study proposes a calibration method of parallel mechanisms for machine tools by response surface methodology (RSM). RSM finds the optimum solution by employing a response surface that approximates an input-output relationship of a certain problem. The methodology obtains the response surface from a small number of data that are selected by experimental design. The present study approximates a relationship between the target postures and the output errors of a parallel mechanism by response surface. Furthermore, the calibrated control values are obtained from the response surface. It is beneficial that the output errors of a parallel mechanism can be estimated from a small number of measured data by RSM because the measurement of its posture is so difficult. This study shows the proposed method can distinctly improve the positioning accuracy of a spatial 3 dof parallel mechanism from a small number of the measured data by numerical simulation, and the availability of the proposed method is actually confirmed by the calibration of a machine tool consisting of the parallel mechanism.
2010-07-25