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Optimal control for elasto-orthotropic plate

Lovišek J., Králik J.

Control and Cybernetics

2006

Vol. 35, no 2

219-278

The optimal control problems and a weight minimization problem are considered for elastic three-layered plate with inner obstacle and friction condition on a part of the boundary. The state problem is represented by a variational inequality and the design variables influence both the coefficients and the set of admissible state functions. We prove the existence of a solution to the above-mentioned problem on the basis of a general theorem on the control of variational inequalities. Next, the approximate optimization problem is proved on the basis of the general theorem for the continuous problem. When the mesh/size tends to zero, then any sequence of appropriate solutions converges uniformly to a solution of the continuous problem. Finally, the application to the optimal design of unilaterally supported of rotational symmetrical load elastic annular plate is presented.

Obstacle control problem and the unilateral eigenvalue problem of an elastic pseudoplate

Lovisek J.

Control and Cybernetics

2003

Vol. 32, no 2

259-300

This paper concerns an obstacle control problem of an elastic pseudoplate. The state problem is modelled by a semi-coercive variational inequality, where the control variable enters the coefficients of linear operator and a linear functional. Moreover, we consider the state eigenvalue problem for a minimal first eigenvalue associated with the vibration of pseudoplate. Existence of an optimal control is verified. Finally, approximate solutions with some convergence analysis are provided.