TITLE:
State Estimation over Customized Wireless Network
AUTHORS:
Sayed Vahid Naghavi, Ali Azami, Freidoon Shabaninia
KEYWORDS:
Estimation; Customized Wireless Network; Kalman Filtering; Time Varying Delay
JOURNAL NAME:
Wireless Engineering and Technology,
Vol.3 No.4,
November
1,
2012
ABSTRACT: In this paper the state estimation techniques are investigated over customized wireless network for a continuous-time plant. It is assumed that the plant is connected to the controller over the proposed network. The feedback control over wireless networks includes limited bandwidth, time-varying and unknown delays with a high probability of data loss. Reasonably, some of these issues are deduced from the wireless networks structures. In order to deal with these problems the customized wireless network architecture is proposed for this Wireless Networked Control System (WNCS) and the problem of transmission delays and packet losses which induced by this scheme is studied. The time-varying delays of the TCP based shared network is estimated by fuzzy state estimation technique. Thereafter the kalman filtering is applied to address the problem of optimal filtering for this continuous-time plant with time-varying delays. The re-organized innovation analysis approach is applied to tackle the network induced time-varying delays. The simulation results show the applicability of the proposed approach.