Optimal linear estimation for systems with transmission delays and packet dropouts

2013 ◽  
Vol 7 (9) ◽  
pp. 814-823 ◽  
Author(s):  
Cui Zhu ◽  
Yuanqing Xia ◽  
Lihua Xie ◽  
Liping Yan
Keyword(s):  
Linear Estimation ◽  
Packet Dropouts ◽  
Transmission Delays ◽  
Optimal Linear

scholarly journals Modelling and Estimation for Uncertain Systems with Transmission Delays, Packet Dropouts, and Out-of-Order Packets

Complexity ◽  
2018 ◽  
Vol 2018 ◽  
pp. 1-15 ◽  
Author(s):  
Li Liu ◽  
Aolei Yang ◽  
Wenju Zhou ◽  
Wasif Naeem ◽  
Gang Wang ◽  
...  
Keyword(s):  
Uncertain Systems ◽  
Estimation Accuracy ◽  
Delay Compensation ◽  
Packet Dropouts ◽  
Transmission Delays ◽  
Cross Covariance ◽  
Linear Delay ◽  
Optimal Linear ◽  
Estimation Scheme ◽  
Distributed Measurement

The study focuses on the modelling and estimation of a class of discrete-time uncertain systems, including network-induced random delays, packet dropouts, and out-of-order packets during the data transmission from the plant to the estimator. In order to improve system performance, event-triggered signal selection method is used to establish the system model. Based on this model, a distributed measurement and centralized fusion estimation scheme is designed using a robust finite horizon Kalman-type filter. Since the phenomena caused by the network-induced deteriorate estimation accuracy, a time-based reorganization measurement is employed to design a linear delay compensation strategy based on estimation. Moreover, in order to obtain the optimal linear estimation, weighted fusion estimation approach is used to perform information collaboration through the error cross-covariance matrix. Simulation results demonstrate that the proposed method has higher estimation performance than the existing methods in this study.

Optimal linear estimation for systems with multiple packet dropouts

Automatica ◽  
2008 ◽  
Vol 44 (5) ◽  
pp. 1333-1342 ◽  
Author(s):  
Shuli Sun ◽  
Lihua Xie ◽  
Wendong Xiao ◽  
Yeng Chai Soh
Keyword(s):  
Linear Estimation ◽  
Packet Dropouts ◽  
Optimal Linear

scholarly journals Optimal linear quadratic control for wireless sensor and actuator networks with random delays and packet dropouts

2018 ◽  
Vol 14 (6) ◽  
pp. 155014771877956
Author(s):  
Zhuwei Wang ◽  
Lihan Liu ◽  
Chao Fang ◽  
Xiaodong Wang ◽  
Pengbo Si ◽  
...  
Keyword(s):  
Frequency Control ◽  
Optimal Solution ◽  
Load Frequency Control ◽  
Wireless Sensor ◽  
Linear Quadratic Control ◽  
Linear Quadratic ◽  
Relay Nodes ◽  
Packet Dropouts ◽  
Frequency Control System ◽  
Optimal Linear

In this article, the optimal linear quadratic control problem is considered for the wireless sensor and actuator network with stochastic network-induced delays and packet dropouts. Considering the event-driven relay nodes, the optimal solution is obtained, which is a function of the current plant state and all past control signals. It is shown that the optimal control law is the same for all locations of the controller placement. Since the perfect plant state information is available at the sensor, the optimal controller should be collocated with the sensor. In addition, some issues such as the plant state noise and suboptimal solution are also discussed. The performance of the proposed scheme is investigated by an application of the load frequency control system in power grid.

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