基于测量数据反演并联机床非线性位姿误差模型

NON-LINEAR ERROR MODELING OF THE POSITION AND ORIENTATION OF PARALLEL MACHINE TOOL BASED ON THE MEASURING DATA

利用最小二乘技术识别模型参数 ,将非线性问题作线性化处理 ,提出了一种基于测量数据反演非线性误差模型的建模方法。结合算例 ,指出了此类模型设计应注意的问题。五轴并联机床约束机构误差模型仿真结果表明 ,由此得到的误差模型精度高。利用所得模型对机床位姿进行补偿 。

Converting a nonlinear problem to a linear one by means of the least square fit method,it is presented a nonlinear error modeling method based on the measuring data Combined with the example, the items be attended is pointed out in modeling The results of simulation of five axes parallel machine tool show that the model based on the above method is of high accuracy Using the model to compensate the machine tool can raise the accuracy of it greatly