Authors: Shuang Cong, Hua Zheng
Addresses: Department of Automation, University of Science and Technology of China, Hefei, Anhui, PR China. ' Department of Automation, University of Science and Technology of China, Hefei, Anhui, PR China
Abstract: In remote Networked Control Systems (NCSs), the system setup depends on the driven mode for each network node, such as time-driven or event-driven. In this paper, based on the NCS with a special kind of network delay, the general formulae of system models are deduced for different cases, in which the sensor adopts the time-driven mode, with the controller and the actuator using either the time-driven or the event-driven mode. The effects of different driven modes for network nodes on the system performance are studied and compared. The issue about how to select suitable driven modes for nodes is discussed with regard to different system requirements and delay ranges. The theoretical results are further illustrated and confirmed by a numerical example.
Keywords: NCS; networked control systems; time-driven network nodes; event-driven network nodes; modelling; performance analysis; network delay.
International Journal of Computer Applications in Technology, 2009 Vol.34 No.3, pp.192 - 198
Published online: 21 Mar 2009 *Full-text access for editors Full-text access for subscribers Purchase this article Comment on this article