Time-optimal control problem for co-operative hyperbolic systems involving the Laplace operator

Springer Science and Business Media LLC - Tập 15 - Trang 405-423 - 2009
H. A. El-Saify1, H. M. Serag2, M. A. Shehata1
1Department of Mathematics, Faculty of Science, Beni-Suef University, Beni-Suef, Egypt
2Department of Mathematics, Faculty of Science, Al-Azhar University, Naser City, Cairo, Egypt

Tóm tắt

In this paper, the time-optimal control problem for (2 × 2)-co-operative hyperbolic system with variable coefficients and involving Laplace operator is considered. This problem is, steering the initial state ((y(0), y′(0)) so that the observation z(t) hitting a given target set in minimum time. For different cases of the observation, the time-optimal controls are characterized in terms of the adjoint, this characterization (in particular case of the space of controls) is used to derive specific properties of the optimal control (bang-bangness, uniqueness, etc.). These results are extended to the case of (n × n)-co-operative hyperbolic system.

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