Multilateration Measurement and Unconstrained & Non-redundant Identification of Geometric Errors in Three-axis Machine Tools
The measurement and identification of geometric errors in machine tools are the foundation for improving their accuracy.The method of measuring and identifying geometric errors using tracking interferometers has received significant attention due to its efficiency and convenience.In this paper,a multilateration method for identifying geometric errors in 3-axis machine tools which is non-redundant and unconstrained is proposed.By employing intermediate coordinate systems and appropriate physical quantities,this method fully eliminates redundant parameters and additional constraints during the identification process.Compared with existing methods,this method offers advantages in terms of solution stability and computational efficiency.Experimental results demonstrate the comprehensive and accurate identification of all 21 geometric errors in the three-axis machine tool.
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