Observer-Based Feedback Control of Networked Control Systems With Delays and Packet Dropouts

2015 ◽  
Vol 138 (2) ◽  
Author(s):  
Qixin Zhu ◽  
Kaihong Lu ◽  
Yonghong Zhu
Keyword(s):  
Control Systems ◽  
Networked Control Systems ◽  
Networked Control System ◽  
Networked Control ◽  
Discrete Time System ◽  
Packet Dropouts ◽  
Transmission Delays ◽  
Inequality Theory ◽  
Time Varying Parameter ◽  
Theoretical Results

The observer-based feedback controller of a new linear networked control system (NCS) with both delays and packet dropouts is designed when the state information is not fully available. With the effects of transmission delays, NCSs are modeled as a discrete-time system with time-varying parameter. The occurrence of packet dropouts is modeled as a Bernoulli event in the NCSs. Under certain conditions, the observer-based controller is proved to render the corresponding NCSs exponentially mean-square stable based on Lyapunov stability theorem and matrix inequality theory. Finally, numerical simulations are included to demonstrate the theoretical results.

scholarly journals The Stabilization of Continuous-Time Networked Control Systems with Data Drift

2015 ◽  
Vol 2015 ◽  
pp. 1-9
Author(s):  
Qixin Zhu ◽  
Kaihong Lu ◽  
Yonghong Zhu
Keyword(s):  
Control Systems ◽  
Continuous Time ◽  
Networked Control Systems ◽  
Networked Control System ◽  
Networked Control ◽  
Linear Matrix ◽  
Loop Model ◽  
Guaranteed Cost ◽  
Data Dropouts ◽  
Theoretical Results

By data drift, we mean the data received by the controller may be different from that sent by the sensor, or the data received by actuator may be different from that sent by the controller. The issues of guaranteed cost control for a class of continuous-time networked control systems with data drift are investigated. Firstly, with the consideration of data drift between sensor and controller, a closed-loop model of networked control systems including network factors such as time-delay and data-dropouts is established. And then, selecting an appropriate Lyapunov function, a guaranteed cost controller in terms of linear matrix inequality (LMI) is designed to asymptotically stabilize the networked control system with data drift. Finally, simulations are included to demonstrate the theoretical results.

H∞ Filtering for a Class of Networked Control Systems with Packet Dropouts

2013 ◽  
Vol 321-324 ◽  
pp. 2326-2330
Author(s):  
Hua Jing Zhang ◽  
Xue Feng Zhang ◽  
Yan Xia Shen
Keyword(s):  
Control Systems ◽  
Networked Control Systems ◽  
Networked Control System ◽  
Networked Control ◽  
Packet Dropout ◽  
Sufficient Condition ◽  
Dynamic Information ◽  
Packet Dropouts ◽  
Error System ◽  
Switching Filter

The problem of H∞ filtering for networked control system with packet dropouts is discussed. By analyzing packet dropout dynamics and presenting a switching filter, the new filtering error system corresponding to the dynamic information of the packet dropouts is structured. A sufficient condition in terms of LMIs for the system to be stable with a prescribed H performance is obtained. The result is less conservative. A numerical example illustrates the effectiveness of the presented method.

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