关键词: 位模式, 插补, 数据生成, 可控误差, 速度控制

Abstract: To provide accurate interpolation data for the bit pattern interpolation of the slave computer and ensure the real-time performance of the slave computer, an error-controllable bit pattern interpolation data generation algorithm based on the master computer was proposed. At first, the tool-path was acquired according to the key points of the machining curves. Parametric cubic spline was used to fit these key points. Then, the tool-path was dispersed into many line segments. To ensure the calculation accuracy, the equation reflecting the relationship between the maximum allowable error and the segment number was deduced. The dispersing was based on the equation. After that, the bit pattern interpolation data was generated according to these line segments and was sent to the slave computers. Furthermore, to improve the processing effect of the bit pattern interpolation, velocity control of the bit pattern interpolation was studied. The mathematical model of time period of bit pattern interpolation was constructed. The experimental results showed that the proposed algorithm was feasible and effective.

Key words: bit pattern, interpolating, data generating, controllable error, velocity control