TY - GEN
T1 - Multi-hopping induced gain scheduling for wireless networked controlled systems
AU - Nikolakopoulos, George
AU - Panousopoulou, Athanasia
AU - Tzes, Anthony
AU - Lygeros, John
PY - 2005
Y1 - 2005
N2 - A multi-hopping induced gain scheduler for Wireless Networked Controlled Systems (WiNCS) is proposed. The control scheme is based on a client-server architecture. The data packets are assumed to be carried over a network composed of wireless sensor nodes running the 802.11b protocol. The number of hops necessary for packets to reach their destinations is variable and depends on current traffic conditions. Changes in the number of hops induces changes in the latency times introduced by the communication network in the feedback loop. To deal with these changes an LQR-output feedback scheme is introduced, whose parameters are adjusted according to the number of the hops. The weights of the LQR controllers are subsequently tuned using LMIs to ensure a prescribed stability margin despite the variable latency times. The overall scheme resembles a gain scheduled controller with the number of hops playing the role of the scheduling parameter. Simulation results on the NS-2 simulator are provided to highlight the efficacy of the proposed scheme.
AB - A multi-hopping induced gain scheduler for Wireless Networked Controlled Systems (WiNCS) is proposed. The control scheme is based on a client-server architecture. The data packets are assumed to be carried over a network composed of wireless sensor nodes running the 802.11b protocol. The number of hops necessary for packets to reach their destinations is variable and depends on current traffic conditions. Changes in the number of hops induces changes in the latency times introduced by the communication network in the feedback loop. To deal with these changes an LQR-output feedback scheme is introduced, whose parameters are adjusted according to the number of the hops. The weights of the LQR controllers are subsequently tuned using LMIs to ensure a prescribed stability margin despite the variable latency times. The overall scheme resembles a gain scheduled controller with the number of hops playing the role of the scheduling parameter. Simulation results on the NS-2 simulator are provided to highlight the efficacy of the proposed scheme.
KW - LMI
KW - Networked controlled system
KW - Time delayed systems
KW - Wireless sensor networks
UR - http://www.scopus.com/inward/record.url?scp=33847183928&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33847183928&partnerID=8YFLogxK
U2 - 10.1109/CDC.2005.1582200
DO - 10.1109/CDC.2005.1582200
M3 - Conference contribution
AN - SCOPUS:33847183928
SN - 0780395689
SN - 9780780395688
T3 - Proceedings of the 44th IEEE Conference on Decision and Control, and the European Control Conference, CDC-ECC '05
SP - 470
EP - 475
BT - Proceedings of the 44th IEEE Conference on Decision and Control, and the European Control Conference, CDC-ECC '05
T2 - 44th IEEE Conference on Decision and Control, and the European Control Conference, CDC-ECC '05
Y2 - 12 December 2005 through 15 December 2005
ER -