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Variational optimality condition in the problem of control of initial boundary conditions for semilinear hyperbolic systems. (English. Russian original) Zbl 1156.49019
Autom. Remote Control 69, No. 4, 559-569 (2008); translation from Avtom. Telemekh. 2008, No. 4, 17-28 (2008).
Summary: Consideration is given to the problem of optimal control of a system of semilinear hyperbolic equations at finite-dimensional (pointwise) relations between initial boundary states of the system and control actions. In this case, the optimality condition in the form of a pointwise maximum principle is invalid. A nonclassical optimality condition of a variational type is proved. The sense of the obtained result is in that an optimal boundary or start control nearly at each point is a solution to a special problem of control of initial conditions for the system of ordinary differential equations constructed on the family of characteristics of the initial hyperbolic system. Constructions of the indicated optimality condition are illustrated by two examples. An iterative method based on the obtained result is stated. The method does not require additional assumptions about the differentiability of parameters of the control problem and convexity of the set of admissible controls necessary in using gradient methods.
MSC:
49K20 Optimality conditions for problems involving partial differential equations
35B37 PDE in connection with control problems (MSC2000)
35L45 Initial value problems for first-order hyperbolic systems
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