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Estimation Schemes for Networked Control Systems Using UDP-Like Communication

Epstein, Michael and Shi, Ling and Murray, Richard M. (2007) Estimation Schemes for Networked Control Systems Using UDP-Like Communication. In: 46th IEEE Conference on Decision and Control. IEEE , Piscataway, NJ, pp. 3945-3951. ISBN 978-1-4244-1497-0.

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In this work we consider a class of networked control systems (NCS) when the control signal is sent to the plant via a UDP-like communication protocol, the controller sends a communication packet to the plant across a lossy network but the controller does not receive any acknowledgement signal indicating the status of reception/delivery of the control packet. Standard observer based estimators assume the estimator has knowledge of what control signal is applied to the plant, but under the UDP-like communication scheme the estimator does not know what control is applied. Continuing previous work, we present a simple estimation algorithm consisting of a state estimator and mode observer. For single input systems we can add an extra control signal that guarantees recovery of the fate of the control packet. Using a modified state feedback with the added input we can guarantee the estimation error is bounded as is the expected value of the state. This extra input is removed and sufficient conditions on the system properties are given to assure the estimation remain bounded. Comparisons are made between the algorithm presented and the method of unknown input observer. Simulations are provided to demonstrate the algorithm.

Item Type:Book Section
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Murray, Richard M.0000-0002-5785-7481
Additional Information:© 2007 IEEE.
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INSPEC Accession Number9885939
Record Number:CaltechAUTHORS:20100826-114646843
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Official Citation:Epstein, M.; Ling Shi; Murray, R.M.; , "Estimation schemes for networked control systems using UDP-like communication," Decision and Control, 2007 46th IEEE Conference on , vol., no., pp.3945-3951, 12-14 Dec. 2007 doi: 10.1109/CDC.2007.4434841 URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:19672
Deposited By: Jason Perez
Deposited On:26 Aug 2010 21:43
Last Modified:08 Nov 2021 23:54

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