Geodesic
Real-time calculation of the current state estimates for a class of delay systems
Žurnal vyčislitelʹnoj matematiki i matematičeskoj fiziki, Tome 46 (2006) no. 11, pp. 1972-1986

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The linear optimal observation problem is examined for one type of nonstationary delay system with an uncertainty in the initial state. A fast implementation of the dual method is proposed for calculating estimates of the initial state. This implementation is based on the quasi-reduction of the fundamental matrix of solutions to the mathematical model of delay systems. It is shown that an iteration step of the dual method only requires that auxiliary systems of ordinary differential equations be integrated on small time intervals. An algorithm is described for the real-time calculation of current state estimates. The results are illustrated by the optimal observation problem for a third-order stationary delay system. 
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     author = {R. Gabasov and F. M. Kirillova and P. V. Makevich},
     title = {Real-time calculation of the current state estimates for a class of delay systems},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {1972--1986},
     publisher = {mathdoc},
     volume = {46},
     number = {11},
     year = {2006},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_2006_46_11_a4/}
}
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R. Gabasov; F. M. Kirillova; P. V. Makevich. Real-time calculation of the current state estimates for a class of delay systems. Žurnal vyčislitelʹnoj matematiki i matematičeskoj fiziki, Tome 46 (2006) no. 11, pp. 1972-1986. http://geodesic.mathdoc.fr/item/ZVMMF_2006_46_11_a4/