Fault Detection Based on Equally Divided Sampling Period to data packet dropout in Networked Control Systems
Considering a class of networked control systems with time-varying delays, the fault detection is carried out with the presence of output delays and packet dropout in sensor data. By increasing sampling frequency in controller and equally dividing the sampling period of the sensor, the time delays could be approximate to an integral multiple of the sampling period of the controller. On this basis and the conditions of data arrival of controller, the error equation of the fault observer was constructed based on a discrete asynchronous dynamical system. And a linear matrix inequality gave the stability condition of this observer. When the system was normal, if the given inequality condition was satisfied, the observer system was stable. When a fault was present, the observer residue could change rapidly and detected the occurrence of the fault. Finally, an illustrative example was given to demonstrate the effectiveness of the proposed method.
networked control systems network-induced delays data packet dropout fault detection
ZHANG Jie BO Yu-ming TAO De-jin YE Chang-bin
Automation Department Nanjing University of Science and Technology Nanjing, China R & D Center Chongqing Wangjiang Industrial Co. Ltd. Chongqing, China
国际会议
长春
英文
258-262
2010-08-24（万方平台首次上网日期，不代表论文的发表时间）