Abstract
In this paper, a new numerical method for solving the optimal control of linear time-varying delay systems with quadratic performance index is presented. The method is based upon hybrid functions approximation. The properties of hybrid functions, consisting of block-pulse functions and Bernoulli polynomials, are presented. The operational matrices of integration, product, delay and the integration of the cross product of two hybrid functions of block-pulse and Bernoulli polynomials vectors are given. These matrices are then utilized to reduce the solution of the optimal control of delay systems to the solution of algebraic equations. Illustrative examples are included to demonstrate the validity and applicability of the technique.
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Jamshidi, M., Wang, C.M.: A computational algorithm for large-scale nonlinear time-delay systems. IEEE Trans. Syst. Man Cybern. 14, 2–9 (1984)
Kwakernaak, H., Sivan, R.: Linear Optimal Control Systems. Wiley-Interscience, New York (1972)
Khellat, F.: Optimal control of linear time-delayed systems by linear Legendre multiwavelets. J. Optim. Theory Appl. 143, 107–121 (2009)
Kharatishvili, G.L.: The maximum principle in the theory of optimal process with time-lags. Dokl. Akad. Nauk SSSR 136, 39–42 (1961)
Inoue, K., Akashi, H., Ogino, K., Sawaragi, Y.: Sensitivity approaches to optimization of linear systems with time-delay. Automatica 17, 671–676 (1971)
Jamshidi, M., Razzaghi, M.: Optimization of linear systems with input time-delay. Kybernetika 11, 375–384 (1975)
Malek-Zavarei, M., Jamshidi, M.: Time-Delay Systems: Analysis, Optimization and Applications. North-Holland, Amsterdam (1978)
Alekal, Y., Brunovsky, P., Chyung, D.H., Lee, E.B.: The quadratic problem for systems with time delays. IEEE Trans. Autom. Control 16, 673–687 (1971)
Delfour, M.C.: The linear quadratic control problem with delays in state and control variables: a state space approach. SIAM J. Control Optim. 24, 835–883 (1986)
Eller, D.H., Aggarwal, J.K., Banks, H.T.: Optimal control of linear time-delay systems. IEEE Trans. Autom. Control 14, 678–687 (1969)
Uchida, K., Shimemura, E., Kubo, T., Abe, N.: The linear-quadratic optimal control approach to feedback control design for systems with delay. Automatica 24, 773–780 (1988)
Razzaghi, M., Elnagar, G.: Linear quadratic optimal control problems via shifted Legendre state parameterization. Int. J. Syst. Sci. 25, 393–399 (1994)
Razzaghi, M., Razzaghi, M.: Instabilities in the solution of a heat conduction problem using Taylor series and alternative approaches. J. Franklin Inst. 326, 683–690 (1989)
Kajani, M.T., Vencheh, A.H.: Solving second kind integral equations with hybrid Chebyshev and block-pulse functions. Appl. Math. Comput. 163, 71–77 (2005)
Razzaghi, M., Marzban, H.R.: Direct method for variational problems via hybrid of block-pulse and Chebyshev functions. Math. Probl. Eng. 6, 85–97 (2000)
Wang, X.T., Li, Y.M.: Numerical solutions of integro differential systems by hybrid of general block-pulse functions and the second Chebyshev polynomials. Appl. Math. Comput. 209, 266–272 (2009)
Hsiao, C.H.: Hybrid function method for solving Fredholm and Volterra integral equations of the second kind. J. Comput. Appl. Math. 230, 59–68 (2009)
Marzban, H.R., Razzaghi, M.: Hybrid functions approach for linearly constrained quadratic optimal control problems. Appl. Math. Model. 27, 471–485 (2003)
Marzban, H.R., Razzaghi, M.: Optimal control of linear delay systems via hybrid of block-pulse and Legendre polynomials. J. Franklin Inst. 341, 279–293 (2004)
Singh, V.K., Pandey, R.K., Singh, S.: A stable algorithm for Hankel transforms using hybrid of block-pulse and Legendre polynomials. Comput. Phys. Commun. 181, 1–10 (2010)
Marzban, H.R., Razzaghi, M.: Analysis of time-delay systems via hybrid of block-pulse functions and Taylor series. J. Vib. Control 11, 1455–1468 (2005)
Marzban, H.R., Razzaghi, M.: Solution of multi-delay systems using hybrid of block-pulse functions and Taylor series. J. Sound Vib. 292, 954–963 (2006)
Costabile, F., Dellaccio, F., Gualtieri, M.I.: A new approach to Bernoulli polynomials. Rend. Mat., Serie VII. 26, 1–12 (2006)
Arfken, G.: Mathematical Methods for Physicists, 3rd edn. Academic Press, San Diego (1985)
Kreyszig, E.: Introductory Functional Analysis with Applications. Wiley, New York (1978)
Lancaster, P.: Theory of Matrices. Academic Press, New York (1969)
Datta, K.B., Mohan, B.M.: Orthogonal Functions in Systems and Control. World Scientific, Singapore (1995)
Pananisamy, K.R., Rao, G.P.: Optimal control of linear systems with delays in state and control via Walsh functions. Proc. IEEE 130, 300–312 (1983)
Banks, H.T., Burns, J.A.: Hereditary control problem: numerical methods based on averaging approximations. SIAM J. Control Optim. 16, 169–208 (1978)
Lee, A.Y.: Numerical solution of time-delayed optimal control problems with terminal inequality constraints. Optim. Control Appl. Methods 14, 203–210 (1993)
Teo, K.L., Wong, K.H., Clements, D.J.: Optimal control computation for linear time-lag systems with linear terminal constrains. J. Optim. Theory Appl. 44, 509–526 (1984)
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Communicated by Ilio Galligani.
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Haddadi, N., Ordokhani, Y. & Razzaghi, M. Optimal Control of Delay Systems by Using a Hybrid Functions Approximation. J Optim Theory Appl 153, 338–356 (2012). https://doi.org/10.1007/s10957-011-9932-1
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DOI: https://doi.org/10.1007/s10957-011-9932-1