Synthesis of Wireless Networked Control System Based on Round-trip Delay Online Estimation

2020 ◽  
Author(s):  
Liang Lu ◽  
Qipeng Liang ◽  
Qiaohui Zhu ◽  
Yunbo Zhao
Keyword(s):  
Control System ◽  
Networked Control System ◽  
Networked Control ◽  
Round Trip ◽  
Online Estimation ◽  
Round Trip Delay ◽  
Wireless Networked Control System

scholarly journals Joint Design of Control and Power Efficiency in Wireless Networked Control System

2014 ◽  
Vol 2014 ◽  
pp. 1-10
Author(s):  
Yan Wang ◽  
Zhicheng Ji
Keyword(s):  
Control System ◽  
Power Consumption ◽  
Adaptive Sampling ◽  
Power Efficiency ◽  
Sampling Period ◽  
Networked Control System ◽  
Networked Control ◽  
System Stability ◽  
Joint Design ◽  
Wireless Networked Control System

This paper presents a joint design method for wireless networked control system (WNCS) to balance both the demands of network service and the control performance. Since the problems of power consumption, communication reliability, and system stability exist simultaneously and interdependently in WNCS, most of the achieved results in the wireless network and wired networked control system cannot be used directly. To coordinate the three problems, sampling period is found to be the linking bridge. An adaptive sampling power efficiency algorithm is proposed to manage the power consumption such that it can meet the demands of network life span. The sampling period is designed to update periodically on the constraints of network schedulability and system stability. The convergence of the power efficiency algorithm is further proved. The sampling period is no longer a fixed value, however; thus, increasing the difficulty in modeling and controlling such a complicated time-varying system remains. In this work, a switched control system scheme is applied to model such a WNCS, and the effect of network-induced delay is considered. Switched feedback controllers are introduced to stabilize the WNCS, and some considerations on stability condition and the bounds of the update circle for renewing sampling period are discussed. A numerical example shows the effectiveness of the proposed method.

scholarly journals Stabilization of a Wireless Networked Control System with Packet Loss and Time Delay: An ADS Approach

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
Jing Wang ◽  
Bingxin Shi ◽  
Jianjun Bai ◽  
Jinfeng Gao ◽  
Xiaosheng Fang
Keyword(s):  
Control System ◽  
Time Delay ◽  
Dynamic System ◽  
Packet Loss ◽  
Networked Control System ◽  
Networked Control ◽  
Sufficient Condition ◽  
Stabilization Problem ◽  
Unstable Subsystems ◽  
Wireless Networked Control System

The stabilization problem of a wireless networked control system is considered in this paper. Both time delay and packet loss exist simultaneously in the wireless network. The system is modeled as an asynchronous dynamic system (ADS) with unstable subsystems. A sufficient condition for the system to be stable is presented. A numerical example is given to demonstrate the effectiveness of the proposed approach.

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