A Real-time Contour Error Estimation Method and Its Pre-compensation Simulation
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摘要: 针对诸多已有的轮廓误差估算方法模型复杂，计算量大，难以进行实时估算并补偿的缺点，提出了一种基于圆形近似和坐标变换的轮廓误差估算方法。主要是通过两次目标坐标系的变换来简化计算过程，减小计算量，能够应用于实时估算轮廓误差的环境。为验证此算法的有效性，在Simulink环境下进行轮廓误差的预补偿仿真。仿真结果显示，此算法可以实时估算并补偿轮廓误差，并且其估算精度高，补偿过程平稳，能够很大程度上提高数控机床的加工精度。Abstract: Aiming at the shortcomings of many existing contour error estimation methods, such as complex model, large computational complexity and difficult real-time estimation and compensation, a contour error estimation method based on circular approximation and coordinate transformation is proposed. It is mainly to simplify the calculation process and reduce thecalculation amount by transforming the two target coordinate systems, which can be applied to the environment for estimating the contour error in real time. To verify the effectiveness of this algorithm, the pre-compensation simulation of the contour error was performed in the Simulink environment.The simulation results show that the algorithm can estimate and compensate the contour error in real time, and the estimation accuracy is high, the compensation process is stable, and the machining accuracy of the CNC machine tool can be greatly improved.
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Key words:
- CNC machine /
- contour error /
- coordinate transformation /
- Pre-compensation /
- Simulation
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