三点法中测头最佳角位置的确定方法

论述了三点法圆度及轴系运动误差测量系统中确定三个测头最佳角位置的方法。通过分析测头读数误差对圆度各次谐波测量精度的影响,提出了确定三个测头最佳角位置的优化策略,基于MonteCarlo思想和单纯形模式搜索方法编制了高效、高精度的寻优程序,优化得到三个测头的最佳角位置。研究表明：在误差分析的基础上对三个测头的角位置进行优化能很好地解决三点法圆度测量形状失真问题,随机模式搜索寻优是确定测头最佳角位置的有效手段。

A Method for Optimizing the Angle Positions of the Probes in Roundness and Spindle Error Motion Measurement with Three Point Method

The method for optimizing the angle positions of the probes in roundness and spindle error motion measurement with three point method is discussed in this paper.By an analysis on the effect of the reading errors of the probes on the accuracy for roundness and all the harmonics measurements,the strategies for otpimizing the angular positions of the three probes are proposed,the optimal angle positions for the three probes are calculated by an efficient optimization algorithm based on Monte Carlo method and simplex pattern sweep method with high accuracy.The study shows that the distortion of the roundness measured by threee point method can be solved satisfactorily by optimizing the angle positions of the probes based on error analysis,the random pattern sweep method is the efficient means for optimzing the angular positions of the probes.