Experimental analysis and implementation of a multiscale wireless/wired networked control system
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The aim of this paper is to discuss the flexibility and the performance of a multiscale wireless/wired networked control system (NCS). This NCS consists of three different types of dynamic systems (fast, medium, and slow clients) with distinct time scales. The experimental results verified the capability of the NCS to combine both the wired and wireless networks and the control capability of the NCS with various sampling periods. Compared to the original wired NCS, the average steady-state error of the fast client increased by 20% to 30% under the same conditions with the wireless NCS within the bandwidth-utilization (BU) threshold. From the analysis, the sampling period together with the BU and the number of clients will determine the time-delay and packet-loss levels and affect the stability and performance of the NCS in a complex correlated manner. © 2014 Institute of Control, Robotics and Systems and The Korean Institute of Electrical Engineers and Springer-Verlag Berlin Heidelberg.
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