Geodesic
A study of the stability of solutions to inverse problems of dynamics of control systems under perturbations of initial data
Trudy Instituta matematiki i mehaniki, Trudy Instituta Matematiki i Mekhaniki UrO RAN, Tome 20 (2014) no. 3, pp. 218-233 Cet article a éte moissonné depuis la source Math-Net.Ru

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For systems linear in control we consider problems of recovering the dynamics and control from a posteriori statistics of trajectory sampling and known estimates for the sampling error. An optimal control problem of minimizing an integral regularized functional of dynamics and statistics residuals is introduced. Optimal synthesis is used to construct controls and trajectories that approximate a solution of the inverse problem. A numerical approximation method based on the method of characteristics for the Hamilton–Jacobi–Bellman equation and on the notion of minimax/viscosity solution is developed. Sufficient conditions are obtained under which the proposed approximations converge to a normal solution of the inverse problem under a matched vanishing of the approximation parameters (bounds for the sampling error, the regularizing parameter, the grid step in the state variable, and the integration step). Results of the numerical solution of problems of identification and control and trajectory recovery are presented for a mechanical model of gravitation under given statistics of phase coordinate sampling.
Mots-clés : identification
Keywords: regularization method, residual functional, feedback, optimal synthesis, Hamilton–Jacobi–Bellman equation, characteristic system, minimax/viscosity solution. 
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N. N. Subbotina; T. B. Tokmantsev. A study of the stability of solutions to inverse problems of dynamics of control systems under perturbations of initial data. Trudy Instituta matematiki i mehaniki, Trudy Instituta Matematiki i Mekhaniki UrO RAN, Tome 20 (2014) no. 3, pp. 218-233. http://geodesic.mathdoc.fr/item/TIMM_2014_20_3_a14/

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