Analysis of the Dynamic Network Control System with the Time-Delay Effect

• Main Authors: Ching-Wen Cheng, 鄭景文
• Other Authors: Pau-Lo Hsu
• Format: Others
• Language: zh-TW
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/08585726463660511996

碩士 === 國立交通大學 === 電機與控制工程系所 === 95 === To construct a remote control system, a monitoring system has been developed as a platform in this study to debug the CAN network system. Furthermore, both the industrial network CAN and the commercial networks, the Ethernet and the 802.11, have been integrated as network control systems (NCSs). By applying the TCP/IP as the gateway between different networks, an AC servo motor with different networks (a) the Ethernet and the CAN and (b) the wireless 802.11 and the CAN have been established and tested. The time delay between the application layer of the client and the application layer of the remote control target has been measured, analyzed, and processed through experiments. Results of the Ethernet and the CAN system indicate that different sampling periods and environments greatly affect the delayed time. Moreover, the distance has insignificant effect on the time delay of the NCS. In the wireless network environment, time delay may suddenly increases due to its environment disturbance. In the present NCS with the wireless system, the measured time delay processed by eliminating all sudden change values leads to significantly improved results of NCS. Finally, to verify the proposed NCS with a serious time delay, a remote control system by including the Smith predictor has been successfully applied to control a servo motor system form Kaohsiung to the laboratory in Nation Chiao-Tung University to verify the feasibility of the proposed systems.