支持动态重构的制造系统逻辑控制器设计方法

Design Methodology of Reconfigurable Logic Controller for Manufacturing System

摘要:

支持动态重构的制造系统可通过组元升级、组态调整形成新的生产能力和功能，针对制造系统混流生产、快速重构的特点,其逻辑控制器也必须适应这一要求.提出了一种基于可重构Petri网的制造系统逻辑控制器设计方法.首先，根据制造系统的加工控制需求建立逻辑控制器形式化模型；其次，根据系统重构方式给出网重写规则；最后，逻辑控制器根据重写规则动态重构自身结构以适应新的生产需求.制造系统的变化通过重写规则可快速、自动重构成新的系统逻辑控制器并且其行为特性是可判定的.实际应用证明了该逻辑控制器设计方法的有效性和正确性.

Abstract:

Manufacturing system supporting dynamic reconfiguration is able to form new production capacity and functions through component update and adjustment. For these new features, mix production and quick reconfiguration of manufacturing system, its logic controller should also adapt to the requirements. The logic controller design methodology of manufacturing system based on reconfigurable petri nets (RPN) is presented. First, according to manufacturing controlling needs, the formal model of logic controller is built up; then, the net rewriting rules are constructed according to system reconfiguration modes; finally, the logic controller dynamically reconfigure to meet the new production requirements according to rewriting rules. The changes of manufacturing system can reconfigure quickly, automatically and generate the new system logic controller, moreover the behavior of new controller characteristics are decidable. A real case is also presented to verify the efficiency and effectivity of the methodology.