delay compensation using smith predictor for wireless network control system
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ID: 229231
2016
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Abstract
Wireless Sensor Network (WSN) is widely used in the industrial Network Control System (NCS). It relies on the IEEE 802.15.4 MAC protocol to transfer data at low rate. Experimental and theoretical studies proved that the wireless channel produces a time delay. In the NCS, this delay may cause system instability and performance degradation. Delay compensation schemes are used to reduce the delay effects.
In this paper, a delay compensation scheme using classical and adaptive Smith predictor is applied to wireless NCS. The Markov model is proposed to compute the estimated network delay used in the classical predictor. In the adaptive predictor, the channel delay statistics using shift register is proposed to update the estimated delay. To evaluate the proposed schemes, a DC-motor controller system based on IEEE 802.15.4 is built using True Time Matlab software. The system performance with and without the proposed delay compensation scheme is studied. It is also compared to other delay compensation schemes. The results show that the proposed scheme improves the NCS performance significantly and reduces the effect of the delay on the system.
| Reference Key |
gamal2016alexandriadelay
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|---|---|
| Authors | ;Mahmoud Gamal;Nayera Sadek;Mohamed R.M. Rizk;Ahmed K. Abou-elSaoud |
| Journal | PLoS computational biology |
| Year | 2016 |
| DOI |
10.1016/j.aej.2016.04.005
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