Skip to main content
Log in

Suboptimal control of systems with multiple delays

  • Contributed Papers
  • Published:
Journal of Optimization Theory and Applications Aims and scope Submit manuscript

Abstract

The application of Pontryagin's maximum principle to the optimization of linear systems with time delays results in a system of coupled two-point boundary-value problems involving both delay and advance terms. The exact solution of this system of TPBV problems is extremely difficult, if not impossible. In this paper, a fast-converging iterative approach is developed for obtaining the suboptimal control for nonstationary linear systems with multiple state and control delays and with quadratic cost. At each step of the proposed method, a linear nondelay system with an extra perturbing input must be optimized. The procedure can be extended for the optimization of nonlinear systems with multiple time-varying delays, provided that some of the nonlinearities satisfy the Lipschitz condition.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Similar content being viewed by others

References

  1. Kharatishvili, G. L.,The Maximum Principle in the Theory of Optimal Processes with Time Lags, Doklady Akad Nauk USSR, Vol. 136, pp. 39–42, 1961.

    Google Scholar 

  2. Kharatishvili, G. L.,A Maximum Principle in Extremal Problems with Delays, Mathematical Theory of Control, Edited by A. V. Balakrishnan and L. W. Neustadt, Academic Press, New York, New York, 1967.

    Google Scholar 

  3. Eller, D. H., Aggarwal, J. K., andBanks, H. T.,Optimal Control of Linear Time-Delay Systems, IEEE Transactions on Automatic Control, Vol. AC-14, pp. 678–687, 1969.

    Google Scholar 

  4. Alekal, Y., Brunovsky, P., Chyung, D. H., andLee, E. B.,The Quadratic Problem for Systems with Time Delays, IEEE Transactions on Automatic Control, Vol. AC-16, pp. 673–687, 1971.

    Google Scholar 

  5. Ross, D. W., andFlügge-Lotz, I.,An Optimal Control Problem for Systems with Differential Difference Equation Dynamics, SIAM Journal on Control, Vol. 7, pp. 609–623, 1969.

    Google Scholar 

  6. Krasovskii, N. N.,Optimal Processes in Systems with Time Lags, Proceedings of the 2nd IFAC Congress, Basel, Switzerland, 1965.

  7. Aggarwal, J. K.,Computation of Optimal Control for Time-Delay Systems, IEEE Transactions on Automatic Control, Vol. AC-15, pp. 683–685, 1970.

    Google Scholar 

  8. Bate, R. R.,The Optimal Control of Systems with Transport Lag, Advances in Control Systems, Vol. 7, Edited by C. T. Leondes, Academic Press, New York, New York, 1969.

    Google Scholar 

  9. Slater, G. L., andWells, W. R.,On the Reduction of Optimal Time-Delay Systems to Ordinary Ones, IEEE Transactions on Automatic Control, Vol. AC-17, pp. 154–155, 1972.

    Google Scholar 

  10. Ficken, F.,The Continuation Method for Functional Equations, Communications on Pure and Applied Mathematics, Vol. 4, pp. 435–436, 1951.

    Google Scholar 

  11. Roberts, S., andShipman, J.,Continuation in Shooting Methods for Two-Point Boundary-Value Problems, Journal of Mathematical Analysis and Applications, Vol. 18, pp. 45–58, 1967.

    Google Scholar 

  12. Kagiwada, K. H., andKalaba, R. F.,Derivation and Validation of an Initial-Value Method for Certain Nonlinear Two-Point Boundary-Value Problems, Journal of Optimization Theory and Applications, Vol. 2, pp. 378–385, 1968.

    Google Scholar 

  13. Glasser, D.,Numerical Solution of Two-Point Boundary-Value Problems on Total Difference Equations, SIAM Journal on Numerical Analysis, Vol. 6, pp. 591–597, 1969.

    Google Scholar 

  14. Sannuti, P., andKokotovic, P.,Near-Optimal Design of Linear Systems by a Singular Perturbation Method, IEEE Transactions on Automatic Control, Vol. AC-14, pp. 15–21, 1969.

    Google Scholar 

  15. Inoue, K., Akashi, H., Ogino, K., andSawaragi, Y.,Sensitivity Approaches to Optimization of Linear Systems with Time Delay, Automatica, Vol. 7, pp. 671–679, 1971.

    Google Scholar 

  16. Jamshidi, M., andMalek-Zavarei, M.,Suboptimal Design of Linear Control Systems with Time Delay, Proceedings of the IEE, Vol. 119, pp. 1743–1746, 1972.

    Google Scholar 

  17. Chan, H. C., andPerkins, W. R.,Optimization of Time Delay Systems Using Parameter Imbedding, Automatica, Vol. 9, pp. 257–261, 1973.

    Google Scholar 

  18. Malek-Zavarei, M.,Near-Optimum Design of Nonstationary Linear Systems With State and Control Delays, Journal of Optimization Theory and Applications, Vol. 30, No. 1, 1980.

  19. Gracovetsky, S. A., andVidyasagar, M.,Suboptimal Control of Neutral Systems, International Journal of Control, Vol. 18, pp. 121–128, 1973.

    Google Scholar 

Download references

Author information

Authors and Affiliations

Authors

Additional information

Communicated by C. T. Leondes

Rights and permissions

Reprints and permissions

About this article

Cite this article

Malek-Zavarei, M. Suboptimal control of systems with multiple delays. J Optim Theory Appl 30, 621–633 (1980). https://doi.org/10.1007/BF01686725

Download citation

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF01686725

Key Words

Navigation