Design of an Execution Control for a Single-Trunk Multi-Branches Multi-AGVS Transportation System with an Event-Driven Modularized Petri Net

• Main Authors: Yao-Te Hsieh, 謝耀德
• Other Authors: Yuan-Chen Yu
• Format: Others
• Language: zh-TW
• Published: 2005
• Online Access: http://ndltd.ncl.edu.tw/handle/32225487834636783788

碩士 === 國立高雄第一科技大學 === 機械與自動化工程所 === 93 === Material transportation system plays a very essential role in any manufacturing system. It is required in almost every manufacturing activity from receiving, storing, manufacturing, assembling, packing to shipping. Therefore, designing a material transportation system with high operation efficiency and high routing flexibility to make the material supply and delivery just in time, no shortage, no surplus, low WIP, and short lead time is very important for every enterprise. This research firstly proposed a generic material transportation system (GMTS) model which is flexible enough to cover a fairly wide domain of industrial application and is rigorous enough to design an execution control for the generic transportation system. This proposed GMTS model is called “Single Trunk/ Multi-Branches/ Multi-AGVS System” or STMB-AGVS for short. This research then further developed a generic execution control system for all the material transportation systems that can be defined by the proposed STMB-AGVS model. The generic execution control system developed covers all the control tasks in the material transportation system from transportation order taking to motion control of each transportation equipment in every situation possible. An agent-based holonic architecture was adopted in designing the whole execution control system. The whole execution control task contains two types: (1) planning & decision oriented tasks and (2) coordination & control oriented task Event-Driven Process Chain, EPC, was employed for modeling the planning & decision oriented tasks, while an event driven modularized colored petri net, GED-MCPN, was employed for modeling the coordination & control oriented tasks. By this approach, we can clearly yet not too complicatedly specify all the operation details for designing the generic execution control.