The paper deals with the controllability of finite-dimensional linear difference delay equations, i.e., dynamics for which the state at a given time $ t $ is obtained as a linear combination of the control evaluated at time $ t $ and of the state evaluated at finitely many previous instants of time $ t-\Lambda_1,\dots,t-\Lambda_N $. Based on the realization theory developed by Y. Yamamoto for general infinite-dimensional dynamical systems, we obtain necessary and sufficient conditions, expressed in the frequency domain, for the approximate controllability in finite time in $ L^q $ spaces, $ q \in [1, +\infty) $. We also provide a necessary condition for $ L^1 $ exact controllability, which can be seen as the closure of the $ L^1 $ approximate controllability criterion. Furthermore, we provide an explicit upper bound on the minimal times of approximate and exact controllability, given by $ d\max\{\Lambda_1,\dots,\Lambda_N\} $, where $ d $ is the dimension of the state space.
| Citation: |
| [1] |
C. E. Avellar and J. K. Hale, On the zeros of exponential polynomials, J. Math. Anal. Appl., 73 (1980), 434-452.
doi: 10.1016/0022-247X(80)90289-9.
|
| [2] |
L. Baratchart, S. Fueyo, G. Lebeau and J.-B. Pomet, Sufficient stability conditions for time-varying networks of telegrapher's equations or difference-delay equations, SIAM J. Math. Anal., 53 (2021), 1831-1856.
doi: 10.1137/19M1301795.
|
| [3] |
G. Bastin and J.-M. Coron, Stability and Boundary Stabilization of 1-D Hyperbolic Systems, Progress in Nonlinear Differential Equations and their Applications, 88. Subseries in Control, Birkhäuser/Springer, 2016.
doi: 10.1007/978-3-319-32062-5.
|
| [4] |
J.-M. Bony, Cours D'Analyse: Théorie des Distributions et Analyse de Fourier, Editions Ecole Polytechnique, 2001.
|
| [5] |
L. Carleson, Interpolations by bounded analytic functions and the corona problem, Annals of Mathematics, 76 (1962), 547-559.
doi: 10.2307/1970375.
|
| [6] |
Y. Chitour, G. Mazanti and M. Sigalotti, Stability of non-autonomous difference equations with applications to transport and wave propagation on networks, Netw. Heterog. Media, 11 (2016), 563-601.
doi: 10.3934/nhm.2016010.
|
| [7] |
Y. Chitour, G. Mazanti and M. Sigalotti, Approximate and exact controllability of linear difference equations, J. Éc. polytech. Math., (2020), 93-142.
doi: 10.5802/jep.112.
|
| [8] |
J.-M. Coron, Control and Nonlinearity, Mathematical Surveys and Monographs, 136. American Mathematical Society, Providence, RI, 2007.
doi: 10.1090/surv/136.
|
| [9] |
J.-M. Coron and H.-M. Nguyen, On the optimal controllability time for linear hyperbolic systems with time-dependent coefficients, Preprint, arXiv: 2103.02653.
|
| [10] |
J.-M. Coron and H.-M. Nguyen, Dissipative boundary conditions for nonlinear 1-D hyperbolic systems: Sharp conditions through an approach via time-delay systems, SIAM J. Math. Anal., 47 (2015), 2220-2240.
doi: 10.1137/140976625.
|
| [11] |
J.-M. Coron and H.-M. Nguyen, Optimal time for the controllability of linear hyperbolic systems in one-dimensional space, SIAM J. Control Optim., 57 (2019), 1127-1156.
doi: 10.1137/18M1185600.
|
| [12] |
J.-M. Coron and H.-M. Nguyen, Null-controllability of linear hyperbolic systems in one dimensional space, Systems Control Lett., 148 (2021), Paper No. 104851, 8 pp.
doi: 10.1016/j.sysconle.2020.104851.
|
| [13] |
P. A. Fuhrmann, On the corona theorem and its application to spectral problems in {H}ilbert space, Trans. Amer. Math. Soc., 132 (1968), 55-66.
doi: 10.1090/S0002-9947-1968-0222701-7.
|
| [14] |
J. K. Hale and S. M. Verduyn Lunel, Introduction to Functional-Differential Equations, Applied Mathematical Sciences, 99. Springer-Verlag, New York, 1993.
doi: 10.1007/978-1-4612-4342-7.
|
| [15] |
J. K. Hale and S. M. Verduyn Lunel, Strong stabilization of neutral functional differential equations, IMA J. Math. Control Inform., 19 (2002), 5-23.
doi: 10.1093/imamci/19.1_and_2.5.
|
| [16] |
D. Henry, Linear autonomous neutral functional differential equations, J. Differential Equations, 15 (1974), 106-128.
doi: 10.1016/0022-0396(74)90089-8.
|
| [17] |
M. Q. Jacobs and C. E. Langenhop, Criteria for function space controllability of linear neutral systems, SIAM J. Control Optim., 14 (1976), 1009-1048.
doi: 10.1137/0314064.
|
| [18] |
R. E. Kalman and M. L. J. Hautus, Realization of continuous-time linear dynamical systems: Rigorous theory in the style of schwartz, Ordinary Differential Equations, (1972), 151-164.
|
| [19] |
E. W. Kamen, Module structure of infinite-dimensional systems with applications to controllability, SIAM Journal on Control and Optimization, 14 (1976), 389-408.
doi: 10.1137/0314026.
|
| [20] |
F. Maggi, Sets of Finite Perimeter and Geometric Variational Problems: An Introduction to Geometric Measure Theory, Cambridge Studies in Advanced Mathematics, 135. Cambridge University Press, Cambridge, 2012.
doi: 10.1017/CBO9781139108133.
|
| [21] |
A. Manitius and R. Triggiani, Function space controllability of linear retarded systems: A derivation from abstract operator conditions, SIAM J. Control Optim., 16 (1978), 599-645.
doi: 10.1137/0316041.
|
| [22] |
G. Mazanti, Relative controllability of linear difference equations, SIAM J. Control Optim., 55 (2017), 3132-3153.
doi: 10.1137/16M1073157.
|
| [23] |
L. Miller, Controllability cost of conservative systems: Resolvent condition and transmutation, J. Funct. Anal., 218 (2005), 425-444.
doi: 10.1016/j.jfa.2004.02.001.
|
| [24] |
D. A. O'Connor and T. J. Tarn, On the function space controllability of linear neutral systems, SIAM J. Control Optim., 21 (1983), 306-329.
doi: 10.1137/0321018.
|
| [25] |
J. W. Polderman and J. C. Willems, Introduction to Mathematical Systems Theory, A Behavioral Approach, Texts in Applied Mathematics, 26. Springer-Verlag, New York, 1998.
doi: 10.1007/978-1-4757-2953-5.
|
| [26] |
G. Pólya and G. Szegő, Problems and Theorems in Analysis. I. Series, Integral Calculus, Theory of Functions, Classics in Mathematics, Springer-Verlag, Berlin, 1998.
doi: 10.1007/978-3-642-61905-2.
|
| [27] |
W. Rudin, Real and Complex Analysis, McGraw-Hill Book Co., New York, third edition, 1987.
|
| [28] |
W. Rudin, Functional Analysis, Second edition, International Series in Pure and Applied Mathematics, McGraw-Hill, Inc., New York, 1991.
|
| [29] |
D. Salamon, Control and Observation of Neutral Systems, Research Notes in Mathematics, 91. Pitman (Advanced Publishing Program), Boston, MA, 1984.
|
| [30] |
L. Schwartz, Théorie des Distributions, Nouvelle édition, Entiérement Corrigée, Refondue et Augmentée, Publications de l'Institut de Mathématique de l'Université de Strasbourg, IX-X. Hermann, Paris, 1966.
|
| [31] |
E. D. Sontag, Mathematical Control Theory, Deterministic Finite-Dimensional Systems, Second edition, Texts in Applied Mathematics, 6. Springer-Verlag, New York, 1998.
doi: 10.1007/978-1-4612-0577-7.
|
| [32] |
Y. Yamamoto, Realization Theory of Infinite-Dimensional Linear Systems, PhD thesis, University of Florida, Florida, United States, 1978.
|
| [33] |
Y. Yamamoto, Realization theory of infinite-dimensional linear systems. Parts Ⅰ and Ⅱ, Math. Systems Theory, 15 (1981/82), 55-77,169-190.
doi: 10.1007/BF01786978.
|
| [34] |
Y. Yamamoto, Pseudo-rational input/output maps and their realizations: A fractional representation approach to infinite-dimensional systems, SIAM J. Control Optim., 26 (1988), 1415-1430.
doi: 10.1137/0326081.
|
| [35] |
Y. Yamamoto, Reachability of a class of infinite-dimensional linear systems: An external approach with applications to general neutral systems, SIAM J. Control Optim., 27 (1989), 217-234.
doi: 10.1137/0327012.
|
| [36] |
Y. Yamamoto, Coprimeness in the ring of psedorational transfer functions, 2007 Mediterranean Conference on Control Automation, (2007), 1-6.
|
| [37] |
Y. Yamamoto, Bézout identity over a ring of distributions-multivariable case, IFAC Proceedings Volumes, 44 (2011), 10098-10104.
doi: 10.3182/20110828-6-IT-1002.01023.
|
| [38] |
Y. Yamamoto and J. C. Willems, Behavioral controllability and coprimeness for a class of infinite-dimensional systems, Proceeding of the 47th IEEE Conference on Decision and Control, (2008), 1513-1518.
|