A method for estimating and compensating quasistatic errors of machine tools
A method for estimating and compensating quasistatic errors of machine tools
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DOI：
10.1115/1.2901629
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发表时间：
1993-02
期刊：
影响因子：
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通讯作者：
P. Ferreira;C. Liu
中科院分区：
文献类型：
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作者：
P. Ferreira;C. Liu
准静态误差是造成机床定位误差的主要原因。据估计，这些误差占机床误差的70%，而对于生产级加工中心，这些误差高达70至120 μm。本文建立了这些误差的模型。进一步表明，该模型的参数可以通过观察机器工作空间中的几个（九个）误差向量来估计。这两个结果构成了一个可行的误差补偿方案的基础；误差补偿模型和更新模型的参数估计。实验结果验证了该方法的有效性。与校准框架相比，观察到机器的精度有了数量级的提高。
Quasistatic errors are the major contributors to positioning inaccuracies of machine tools. These errors, estimated to account for 70 percent of the errors of the machine, have been observed to be as high as 70 to 120 μm for production class machining centers. In this paper, a model for these errors is developed. Further, it is shown that the parameters for this model can be estimated by the observation of a few (nine) error vectors in the machine’s workspace. These two results form the basis for a viable error compensation scheme; the model for error compensation and the parameter estimation for updating the model. Experimental results verify the validity of the approach. An order-of-magnitude improvement in the accuracy of the machine, with respect to a calibration frame, was observed.