Research on control system of processing high-order aspherical with numerical control tangent method

According to the principle of high-order aspherical machining by numerical control tangent method, an open numerical control system was designed based on UMAC. In the composition of hardware, the function, features and variable applications of the servo axis card was introduced in detail, with the standard of the choice of man-machine interface illustrated. In software, the functions of the operating system, development tools and the dynamic link library were integrated, and the modular method was adopted to design the system management software and full-time control software. The innovativeness of the control system is displayed in the breakthrough in that the position control method in the traditional CNC numerical system controlling motion nodes by full-time rate control, the Hidden Markov model theory was introduced to realize ahead forecast compensation, enabling velocity to be controlled continuously, and therefore improve the accuracy of machining surface, and in the meantime this method can be expanded into all applications of speed servo, which improves the accuracy of locus control.