Stochastic algorithms for robustness of control performances

  • Authors:
  • Benedetto Piccoli;Katarzyna Zadarnowska;Matteo Gaeta

  • Affiliations:
  • Istituto per le Applicazioni del Calcolo "Mauro Picone", Consiglio Nazionale delle Ricerche, Viale del Policlinico 137, 00161 Roma, Italy;Institute of Computer Engineering, Control and Robotics, Wrocław University of Technology, ul. Janiszewskiego 11/17, 50-372 Wrocław, Poland;Department of Information Engineering and Applied Mathematics, University of Salerno, Via Ponte don Melillo, 88084 Fisciano (SA), Italy

  • Venue:
  • Automatica (Journal of IFAC)
  • Year:
  • 2009

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Abstract

In recent years, there has been a growing interest in developing statistical learning methods to provide approximate solutions to ''difficult'' control problems. In particular, randomized algorithms have become a very popular tool used for stability and performance analysis as well as for design of control systems. However, as randomized algorithms provide an efficient solution procedure to the ''intractable'' problems, stochastic methods bring closer to understanding the properties of the real systems. The topic of this paper is the use of stochastic methods in order to solve the problem of control robustness: the case of parametric stochastic uncertainty is considered. Necessary concepts regarding stochastic control theory and stochastic differential equations are introduced. Then a convergence analysis is provided by means of the Chernoff bounds, which guarantees robustness in mean and in probability. As an illustration, the robustness of control performances of example control systems is computed.