A Distributed Control Method for Automatic Manufacturing System

Abstract

The invention relates to an automatic manufacturing system for inserting assembly operation into a flexible machining path, in particular, a distributed control method of the automatic manufacturing system. The method includes the following steps that: a set Ten of enabling transitions is obtained according to the current state of the system; whether each element in Ten can ensure deadlock-free operation of the system is judged, and judgment is carried out through the following manners that: a transmitting element t is simulated, and t belongs to Ten, and according to the position of t, if current resources can support corresponding tokens to arrive at key libraries / sub key libraries of a key library unity, it requires to ensure that the tokens of other parallel processes of assembly operation can all arrive at respective sub key libraries corresponding to the tokens according to the condition of the key library unity, and therefore, t belongs to Tdf; and after all transitions are detected, Tdf is obtained, and the transmitting element t belongs to Tdf, and the method enters a next state, re-judgment is carried out. With the distributed control method of the invention adopted, the system can be free of deadlock assuredly, and high permissibility can be obtained as far as possible, and prediction and control can be carried out simultaneously, and real-time and online control can be realized.

Description

technical field [0001] The invention belongs to the technical field of automatic manufacturing systems, and relates to a distributed control method for automatic manufacturing systems. Background technique [0002] In the past few decades, with the wide application of information technology, automation technology and computing technology, the traditional manufacturing system has gradually transformed into an automatic manufacturing system. The goal is to greatly reduce manufacturing costs, improve product quality and ensure production safety. And can respond quickly to market changes and customization requirements. The deadlock-free nature of an automatic manufacturing system can be compared to the stability of a continuous system. No matter how good a manufacturing system is, once a deadlock occurs, it is unacceptable, because it means that the system may stagnate production at any time. This can lead to serious or even catastrophic consequences. To solve the deadlock pro...

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Problems solved by technology

2. Since the assembly operations are embedded in the flexible processing path, the complexity of the system is greatly enhanced

But in such a complex system, if the Token arrives at its nearest key storehouse as the standard, the deadlock-free nature of the system can also be guaranteed, but it will greatly reduce the permission of the system, thus affecting the performance of the system

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