Fuzzy observer based Fault Detection for Network Control Systems with Periodic Actuation Tasks

2012 ◽  
Vol 45 (20) ◽  
pp. 1035-1040 ◽  
Author(s):  
Paul E. Méndez-Monroy ◽  
Manel Velasco ◽  
Josep M. Fuertes
Keyword(s):  
Fault Detection ◽  
Control Systems ◽  
Network Control ◽  
Fuzzy Observer ◽  
Network Control Systems

scholarly journals Fault Detection for Network Control Systems with Multiple Communication Delays and Stochastic Missing Measurements

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Jie Zhang ◽  
Ming Lyu ◽  
Hamid Reza Karimi ◽  
Jian Zuo ◽  
Yuming Bo
Keyword(s):  
Fault Detection ◽  
Control Systems ◽  
Sufficient Conditions ◽  
Network Control ◽  
Communication Delays ◽  
Missing Measurements ◽  
Fault Detection Filter ◽  
Network Control Systems ◽  
Delay Phenomenon ◽  
Detection Filter

This paper is concerned with fault detection problem for a class of network control systems (NCSs) with multiple communication delays and stochastic missing measurements. The missing measurement phenomenon occurs in a random way and the occurrence probability for each measurement output is governed by an individual random variable. Besides, the multiple communication delay phenomenon reflects that networked control systems have different communication delays when the signals are transferred via different channels. We aim to design a fault detection filter so that the overall fault detection dynamics is exponentially stable in the mean square. By constructing proper Lyapunov-Krasovskii functional, we acquire sufficient conditions to guarantee the stability of the fault detection filter for the discrete systems, and the filter parameters are also derived by solving linear matrix inequality. Finally, an illustrative example is provided to show the usefulness and effectiveness of the proposed design method.

scholarly journals Fault Detection for Wireless Network Control Systems with Stochastic Uncertainties and Time Delays

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Jie Zhang ◽  
Pengfei Guo ◽  
Ming Lyu ◽  
Hamid Reza Karimi ◽  
Yuming Bo
Keyword(s):  
Fault Detection ◽  
Control Systems ◽  
Wireless Network ◽  
Time Delays ◽  
Sufficient Conditions ◽  
Network Control ◽  
Linear Matrix ◽  
Network Control Systems ◽  
The Stability ◽  
Stochastic Uncertainties

The fault detection problem is investigated for a class of wireless network control systems which has stochastic uncertainties in the state-space matrices, combined with time delays and nonlinear disturbance. First, the system error observer is proposed. Then, by constructing proper Lyapunov-Krasovskii functional, we acquire sufficient conditions to guarantee the stability of the fault detection observer for the discrete system, and observer gain is also derived by solving linear matrix inequalities. Finally, a simulation example shows that when a fault happens, the observer residual rises rapidly and fault can be quickly detected, which demonstrates the effectiveness of the proposed method.

Feedback Controlled Adaptive Bandwidth Server Scheduling and its Application in NCS

2014 ◽  
Vol 631-632 ◽  
pp. 761-765
Author(s):  
Jing Cun Bi ◽  
Qi Li ◽  
Wei Jun Yang ◽  
Yan Fei Liu
Keyword(s):  
Control Systems ◽  
Scheduling Algorithm ◽  
Network Control ◽  
Periodic Tasks ◽  
Aperiodic Tasks ◽  
Network Control Systems ◽  
Feedback Scheduling ◽  
Simulation Results ◽  
Adaptive Bandwidth ◽  
Keyword Network

As for the aperiodic tasks of node in network control systems, the FC-ABS (Feedback Controlled Adaptive Bandwidth Server) scheduling algorithm is designed. The different scheduling methods are used according to time characteristics of aperiodic tasks, and feedback scheduling is used to mitigate the effect of aperiodic tasks on periodic tasks. The simulation results show that the method is effective. Keyword: Network Control Systems; Server Scheduling; Feedback Scheduling; FC-ABS.

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