| With the appearance of various advanced manufacturing modes, the distributed manufacture appears , which is the product developing mode basing on the virtual enterprise environment and directed by agile manufacturing. This manufacturing mode requires that the members of league can enter and leave temporily and the communication among members cannot block the network . With the development of network , people try to sovle the problems by new technology . However , the new network technology needs great hardware investments which are out of the burdening of lots of middle and small enterprises . VLAN is a new type network technology which is based on multicasting and allows the net nodes entering and leaving the VLAN temporily . Because the advanced characters of VLAN , it is very significant to apply the VLAN to distributed manufacturing .Supported by GuangDongProvince Key Science and Technology Item (99B1901G), this dissertation studies on the VLAN applying to distributed manufacturing for the first time in nation . The main contents and related original achievements are described in the following :First this dissertation describes the current status of distributed manufacturing, Then this dissertation analyses the mechanism of VLAN in details and points out that the VLAN can be realized without extra hardware investment by IP multicasting technology . And this dissertation researches the mechanism and realizing methods of IP Multicasting and designs the software by VC++6.0 in order to set up the communication basis of distributed manufacturing and realize the characters and files transmission. Using the real-time numeric control system as the controlling object , this dissertation designs the smallest network distributed manufacturing to test the IP multicasting and long-distance inspecting . The results of experiments show that the VLAN based on IP Multicast is superior to traditional LAN and can be satisfy the requirement of distrubited manufacturing. |
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