Autonomous Control of Abrasive Flow Precision Machining
Autonomous nodes distribution, including their relations, real time quality and network communication in abrasive flow precision machining (AFPM) was studied. Autonomous nodes are arranged according to their function. Control program of motor speed is copied into liquid level nodes, pressure nodes, temperature nodes, flux nodes and input/output nodes. If nodes failure has happened, competition algorithm is enabled automatically to select a new node to run important program. Reliability of autonomous control system can be calculated utilizing the formula derived from probability theory. ARM 9 embedded systems with 32 bit CPU and real time embedded operating system are adopted to realize real time quality and reliability of nodes which run independently. CAN field bus and message type flag are used in network communication structure to ensure the real time quality and reliability of nodes connection. Results reveal that using autonomous decentralized control in AFPM possesses not only the characteristic of real time quality, but also the online fault tolerance, which can ensure that system runs continuously even if some nodes break down. The method can avoid system destruction and improve whole system reliability.
Abrasive flow precision machining Autonomous control Reliability Embedded system
J.L.Xu S.M.Ji Z.P.Fang
Key Laboratory of Special Purpose Equipment and Advanced Processing Technology, (Zhejiang University Key Laboratory of Special Purpose Equipment and Advanced Processing Technology, (Zhejiang University School of Electronic and Information Engineering, Zhongyuan University of Technology, Zhengzhou, 450
国际会议
2011 Global Conference on Digital Design and Manufacturing Technology(2011年全国数字设计与制造技术会议)
杭州
英文
384-388
2011-01-23（万方平台首次上网日期，不代表论文的发表时间）