Reconfigurable numerical control system and reconfiguration method

Abstract

The invention discloses a reconfigurable numerical control system which is based on a PC (personal computer), is all-round open and is standard as well as a reconfiguration method of the reconfigurable numerical control system. The invention proposes a procedure-oriented and open processing model. For the invention, control resources are configured according to control flows, and the reconfigurable numerical control system and the reconfiguration method have no relation to a software and hardware platform such as the digit capacity and the speed of a processer, an operation system and the like, have no relation to a programming port and have good reconfigurability and high reliability. In the invention, the real-time control mode for a cutter route curve is converted into the simplest mode of real-time sending of a linkage command, and the reconfigurable numerical control system and the reconfiguration method have simple and reliable high-speed high-precision multi-axis synchronization capacity and lead to a significant reform on digital control method. For a reconfigurable production line consisting of a plurality of numerical control machines, a digitalized clamp, a carrying manipulator and the like, the reconfigurable numerical control system and the reconfiguration method have the significant advantages of integrated control, high reliability, simple structure, low cost and the like.

Description

technical field [0001] The invention belongs to the field of advanced control and advanced manufacturing, and specifically relates to a PC-based, all-round open, standardized reconfigurable numerical control system and its reconfiguration method to meet the requirements of the reconfigurable manufacturing system for the digital control system. technical background [0002] Reconfigurable manufacturing system is the research frontier of advanced manufacturing and the development direction of future manufacturing system. In 1998, the National Research Council of the United States published a research report on "Challenges Facing Manufacturing in 2020", listing reconfigurable manufacturing systems as the first of the 10 key technologies. Reconfigurable machine tool RMT (Reconfigurable Machine Tools) is decisive for reconfigurable manufacturing system. For more than ten years, digital information technology has advanced by leaps and bounds, but reconfigurable machine tools have...

AI Technical Summary

Problems solved by technology

[0026] Since the existing open CNC system based on the IEEE definition has a strong platform dependency, it essentially loses the basis for reconstruction

[0027] Second, the real-time control process is not reconfigurable

The IEEE definition completely ignores the process essence of digital control, and regards the digital control process as an object, which leads to the iteration of digital control information and the iteration of control process. It is impossible to involve the openness of digital control information, the openness of digital control process and the digital control process. Openness of the interface between processes

[0061] 2) The IEEE definition centers on the CNC system. The openness defined is the openness that the computer system itself should have. The architecture of the so-called open CNC system is transplanted from the computer system and is an object-oriented to realize control The software modular architecture cannot reflect the technical characteristics of the CNC system in the entire control process

[0062] 3) The IEEE definition fails to examine the architecture of the open CNC system from the macro perspective of the manufacturing system, and adopts the architecture of a general-purpose computer system, resulting in ambiguity in the concept of openness, which has not yet been unified

Descriptive words such as interoperability, portability, scalability, and interchangeability have become open so-called technical specifications, hindering the standardization process of CNC systems

[0063] 4), IEEE defines object-oriented rather than process-oriented, ignoring the essence of computer numerical control, the numerical control system is "computerized", and the development of digital control technology is led to the so-called "advanced control algorithm" (Japanese OSEC plan), namely The accuracy and speed of the interpolation iterative control algorithm, thus misleading the development direction of digital control technology

[0064] 5) The core issue of the CNC system is the openness and reconfigurability of the real-time control process

[0066] 7), The IEEE definition is not centered on the working machine, but centered on the CNC system, resulting in a large amount of redundant information such as interpolation cycle, contour step size, etc., which violates the principle of simplicity

This fundamentally denies the openness and reconfigurability of the CNC system, artificially complicates the existing digital control technology and the existing open CNC system, and sets insurmountable obstacles for the reconstruction of the CNC system. It will inevitably lead to the inability of the existing open CNC system to evolve into the control machine expected by the third industrial revolution.

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