Robust Optimization of Hybrid Four-probe Cylindricity Measurement Method
The four-probe method is widely used in the contour reconstruction of cylindrical shafting,which has the advantage of field measurement.In order to further improve the measurement accuracy of the four-point method,a hybrid four-point measurement model is constructed.Firstly,multiple three-point measurements are made at the first measurement position under different probe angle arrangement to provide multiple candidate solutions for each harmonic coefficient.Sec-ondly,for a single harmonic coefficient,the optimal estimation is selected from the set of candidate solutions according to the transfer matrix.Move the probe orbit distance to the second measurement position and repeat the above steps until M sec-tions are measured.The overall cylindricity error is obtained by using the optimal harmonic coefficient.Experimental results show that the mixed four-point method is more robust to the measurement of error sources than the conventional method.
万方数据
维普
