A new stability analysis and time-delay tolerance estimation approach for output feedback networked control systems

2010 ◽  
Author(s):  
A.F. Khalil ◽  
Jihong Wang
Keyword(s):  
Stability Analysis ◽  
Time Delay ◽  
Control Systems ◽  
Output Feedback ◽  
Networked Control Systems ◽  
Networked Control ◽  
Delay Tolerance

scholarly journals Stability and Time Delay Tolerance Analysis Approach for Networked Control Systems

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Ashraf F. Khalil ◽  
Jihong Wang
Keyword(s):  
Control System ◽  
Time Delay ◽  
Control Systems ◽  
Networked Control Systems ◽  
Networked Control System ◽  
Networked Control ◽  
Finite Difference Approximation ◽  
System Stability ◽  
Delay Tolerance ◽  
Maximum Time

Networked control system is a research area where the theory is behind practice. Closing the feedback loop through shared network induces time delay and some of the data could be lost. So the network induced time delay and data loss are inevitable in networked control Systems. The time delay may degrade the performance of control systems or even worse lead to system instability. Once the structure of a networked control system is confirmed, it is essential to identify the maximum time delay allowed for maintaining the system stability which, in turn, is also associated with the process of controller design. Some studies reported methods for estimating the maximum time delay allowed for maintaining system stability; however, most of the reported methods are normally overcomplicated for practical applications. A method based on the finite difference approximation is proposed in this paper for estimating the maximum time delay tolerance, which has a simple structure and is easy to apply.

Robust H∞ Control for Singular Networked Control Systems with Uncertain Time-Delay

2013 ◽  
Vol 748 ◽  
pp. 789-792
Author(s):  
Jun Ru Wang ◽  
Hui Jiao Wang ◽  
Bo Zhou
Keyword(s):  
Time Delay ◽  
Asymptotic Stability ◽  
Linear System ◽  
Control Systems ◽  
Output Feedback ◽  
Networked Control Systems ◽  
Networked Control ◽  
Sufficient Condition ◽  
Output Feedback Controller ◽  
Uncertain Time

For singular networked control systems (SNCSs) with uncertain time-delay, the problem of robust control is studied.The SNCS can be modeled as a class of uncertain discrete linear system with uncertain delay. Sufficient condition, which ensures the resulted loop-system to be asymptotic stability with performance index , is derived.Furthermore, the explicit formation of dynamical output feedback controller is also presented.Finally, a numerical example is given to show the effective of the presented method.

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