High-speed high-precision path dynamic forward-looking planning method

Abstract

The invention relates to a high-speed high-precision path dynamic forward-looking planning method. A radius of a transition arc can be initialized, and radius preliminary adjustment can be carried out. According to the maximum permission speed of the transition arc, whether the process from the previous transition arc to the current arc is the acceleration process or the deceleration speed can be determined. When the process is the acceleration process, whether the speed of the acceleration process arriving at the current arc can reach the maximum permission speed of the current arc can be determined by combining with the speed planning, when the answer is yes, the data of the forward-looking window can be corrected, otherwise the radius of the current transition arc can be adjusted. When the process is the deceleration process, and the speed decelerated from the previous transition arc to the current transition arc is greater than the maximum permission speed of the current transition arc, the reverse speed planning can be carried out by starting from the current arc, and then the given data of the forward-looking window can be corrected and stored, and at last, the data of the forward-looking window can be transmitted to the servo system for the processing. By combining the speed planning with the path planning, the processing speed can be accelerated.

Description

Technical field [0001] The invention relates to speed planning and path planning in the field of numerical control technology, and is specifically a high-speed and high-precision dynamic forward planning method for paths. Background technique [0002] In the traditional CNC machining process, the post-processing software generates the machining path, and the CNC system performs the machining according to the machining path with a specific speed planning method. There is no direct connection between the path planning method and the speed planning method, and the processing method is separated from the planning process, which simplifies the factors that need to be considered in path planning and speed planning, but inevitably reduces the information interaction between the two. In path planning, in order to maximize the maximum processing speed allowed on the path, the contour is usually adjusted within the maximum error allowed by the system, but it is limited to the influence of ...

AI Technical Summary

Problems solved by technology

The second is the single-cycle arc transition method, but the processing speed will be reduced at the transition point, and the contour accuracy is difficult to guarantee

The third is vector-based curve transition, which is not suitable for processing small line segments with too short length

Among them, the processing speed generated by the bell-shaped and bell-shaped speed planning methods produces less vibration during actual processing, but the calculation is complex and the amount of calculation is large, which is not suitable for real-time systems.

Images