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System specific triangulations for the construction of CPA Lyapunov functions
1. | Department of Mathematics, University of Sussex, Falmer BN1 9QH, United Kingdom |
2. | Faculty of Physical Sciences, University of Iceland, 107 Reykjavik, Iceland |
Recently, a transformation of the vertices of a regular triangulation of $ {\mathbb {R}}^n $ with vertices in the lattice $ \mathbb{Z}^n $ was introduced, which distributes the vertices with approximate rotational symmetry properties around the origin. We prove that the simplices of the transformed triangulation are $ (h, d) $-bounded, a type of non-degeneracy particularly useful in the numerical computation of Lyapunov functions for nonlinear systems using the CPA (continuous piecewise affine) method. Additionally, we discuss and give examples of how this transformed triangulation can be used together with a Lyapunov function for a linearization to compute a Lyapunov function for a nonlinear system with the CPA method using considerably fewer simplices than when using a regular triangulation.
References:
[1] |
S. Albertsson, P. Giesl, S. Gudmundsson and S. Hafstein,
Simplicial complex with approximate rotational symmetry: A general class of simplicial complexes, J. Comput. Appl. Math., 363 (2020), 413-425.
doi: 10.1016/j.cam.2019.06.019. |
[2] |
J. Anderson and A. Papachristodoulou,
Advances in computational Lyapunov analysis using sum-of-squares programming, Discrete Contin. Dyn. Syst. Ser. B, 20 (2015), 2361-2381.
doi: 10.3934/dcdsb.2015.20.2361. |
[3] |
J. Björnsson, S. Gudmundsson and S. Hafstein, Class library in C++ to compute Lyapunov functions for nonlinear systems, In Proceedings of MICNON, 1st Conference on Modelling, Identification and Control of Nonlinear Systems, no. 0155, 2015,788–793. |
[4] |
P. Giesl, Construction of Global Lyapunov Functions Using Radial Basis Functions, Lecture Notes in Math., vol. 1904, Springer, Berlin, 2007. |
[5] |
P. Giesl and S. Hafstein, Implementation of a fan-like triangulation for the CPA method to compute Lyapunov functions, In Proceedings of the 2014 American Control Conference, Portland, OR, 2014, 2989–2994.
doi: 10.1016/j.jmaa.2013.08.014. |
[6] |
P. Giesl and S. Hafstein,
Revised CPA method to compute Lyapunov functions for nonlinear systems, J. Math. Anal. Appl., 410 (2014), 292-306.
doi: 10.1016/j.jmaa.2013.08.014. |
[7] |
P. Giesl and S. Hafstein,
Computation and verification of Lyapunov functions, SIAM J. Appl. Dyn. Syst., 14 (2015), 1663-1698.
doi: 10.1137/140988802. |
[8] |
P. Giesl and S. Hafstein,
Review of computational methods for Lyapunov functions, Discrete Contin. Dyn. Syst. Ser. B, 20 (2015), 2291-2331.
doi: 10.3934/dcdsb.2015.20.2291. |
[9] |
G. Golub and C. van Loan, Matrix Computations, 4th edition, John Hopkins University Press, Baltimore, MD, 2013.
![]() ![]() |
[10] |
S. Hafstein,
A constructive converse Lyapunov theorem on exponential stability, Discrete Contin. Dyn. Syst., 10 (2004), 657-678.
doi: 10.3934/dcds.2004.10.657. |
[11] |
S. Hafstein,
A constructive converse Lyapunov theorem on asymptotic stability for nonlinear autonomous ordinary differential equations, Dyn. Syst., 20 (2005), 281-299.
doi: 10.1080/14689360500164873. |
[12] |
S. Hafstein, Implementation of simplicial complexes for CPA functions in C++11 using the armadillo linear algebra library, In Proceedings of the 3rd International Conference on Simulation and Modeling Methodologies, Technologies and Applications (SIMULTECH), Reykjavik, Iceland, 2013, 49–57. |
[13] |
S. Hafstein, Simulation and Modeling Methodologies, Technologies and Applications, volume 873 of Advances in Intelligent Systems and Computing, chapter Fast Algorithms for Computing Continuous Piecewise Affine Lyapunov Functions, Springer, 2019,274–299. |
[14] |
S. Hafstein and A. Valfells, Study of dynamical systems by fast numerical computation of Lyapunov functions, In Proceedings of the 14th International Conference on Dynamical Systems: Theory and Applications (DSTA), Mathematical and Numerical Aspects of Dynamical System Analysis, 2017,220–240. |
[15] |
W. Hahn, Stability of Motion, Springer-Verlag New York, Inc., New York, 1967. |
[16] |
R. Kamyar and M. Peet,
Polynomial optimization with applications to stability analysis and control – alternatives to sum of squares, Discrete Contin. Dyn. Syst. Ser. B, 20 (2015), 2383-2417.
doi: 10.3934/dcdsb.2015.20.2383. |
[17] | |
[18] |
A. M. Lyapunov,
The general problem of the stability of motion, Internat. J. Control, 55 (1992), 521-790.
doi: 10.1080/00207179208934253. |
[19] |
S. Marinósson,
Lyapunov function construction for ordinary differential equations with linear programming, Dyn. Syst., 17 (2002), 137-150.
doi: 10.1080/0268111011011847. |
[20] |
P. Parrilo, Structured Semidefinite Programs and Semialgebraic Geometry Methods in Robustness and Optimiza, Ph.D thesis, California Institute of Technology, Pasadena, California, 2000. |
[21] |
S. Ratschan and Z. She,
Providing a basin of attraction to a target region of polynomial systems by computation of Lyapunov-like functions, SIAM J. Control Optim., 48 (2010), 4377-4394.
doi: 10.1137/090749955. |
[22] |
S. Sastry, Nonlinear Systems: Analysis, Stability, and Control, Springer-Verlag, New York, 1999.
doi: 10.1007/978-1-4757-3108-8. |
[23] |
J. Sherman and W. Morrison,
Adjustment of an inverse matrix corresponding to a change in one element of a given matrix, Ann. Math. Statistics, 21 (1950), 124-127.
doi: 10.1214/aoms/1177729893. |
[24] |
G. Valmorbida and J. Anderson,
Region of attraction estimation using invariant sets and rational Lyapunov functions, Automatica J. IFAC, 75 (2017), 37-45.
doi: 10.1016/j.automatica.2016.09.003. |
[25] |
A. Vannelli and M. Vidyasagar,
Maximal Lyapunov functions and domains of attraction for autonomous nonlinear systems, Automatica J. IFAC, 21 (1985), 69-80.
doi: 10.1016/0005-1098(85)90099-8. |
[26] |
M. Vidyasagar, Nonlinear System Analysis, 2nd edition, Classics in Applied Mathematics, vol. 42, SIAM, Philadelphia, PA, 2002.
doi: 10.1137/1.9780898719185. |
[27] |
T. Yoshizawa, Stability Theory by Liapunov's Second Method, Publications of the Mathematical Society of Japan, No. 9. The Mathematical Society of Japan, Tokyo, 1966. |
[28] |
V. I. Zubov, Methods of A. M. Lyapunov and Their Application, P. Noordhoff Ltd., Groningen, 1964. |
show all references
References:
[1] |
S. Albertsson, P. Giesl, S. Gudmundsson and S. Hafstein,
Simplicial complex with approximate rotational symmetry: A general class of simplicial complexes, J. Comput. Appl. Math., 363 (2020), 413-425.
doi: 10.1016/j.cam.2019.06.019. |
[2] |
J. Anderson and A. Papachristodoulou,
Advances in computational Lyapunov analysis using sum-of-squares programming, Discrete Contin. Dyn. Syst. Ser. B, 20 (2015), 2361-2381.
doi: 10.3934/dcdsb.2015.20.2361. |
[3] |
J. Björnsson, S. Gudmundsson and S. Hafstein, Class library in C++ to compute Lyapunov functions for nonlinear systems, In Proceedings of MICNON, 1st Conference on Modelling, Identification and Control of Nonlinear Systems, no. 0155, 2015,788–793. |
[4] |
P. Giesl, Construction of Global Lyapunov Functions Using Radial Basis Functions, Lecture Notes in Math., vol. 1904, Springer, Berlin, 2007. |
[5] |
P. Giesl and S. Hafstein, Implementation of a fan-like triangulation for the CPA method to compute Lyapunov functions, In Proceedings of the 2014 American Control Conference, Portland, OR, 2014, 2989–2994.
doi: 10.1016/j.jmaa.2013.08.014. |
[6] |
P. Giesl and S. Hafstein,
Revised CPA method to compute Lyapunov functions for nonlinear systems, J. Math. Anal. Appl., 410 (2014), 292-306.
doi: 10.1016/j.jmaa.2013.08.014. |
[7] |
P. Giesl and S. Hafstein,
Computation and verification of Lyapunov functions, SIAM J. Appl. Dyn. Syst., 14 (2015), 1663-1698.
doi: 10.1137/140988802. |
[8] |
P. Giesl and S. Hafstein,
Review of computational methods for Lyapunov functions, Discrete Contin. Dyn. Syst. Ser. B, 20 (2015), 2291-2331.
doi: 10.3934/dcdsb.2015.20.2291. |
[9] |
G. Golub and C. van Loan, Matrix Computations, 4th edition, John Hopkins University Press, Baltimore, MD, 2013.
![]() ![]() |
[10] |
S. Hafstein,
A constructive converse Lyapunov theorem on exponential stability, Discrete Contin. Dyn. Syst., 10 (2004), 657-678.
doi: 10.3934/dcds.2004.10.657. |
[11] |
S. Hafstein,
A constructive converse Lyapunov theorem on asymptotic stability for nonlinear autonomous ordinary differential equations, Dyn. Syst., 20 (2005), 281-299.
doi: 10.1080/14689360500164873. |
[12] |
S. Hafstein, Implementation of simplicial complexes for CPA functions in C++11 using the armadillo linear algebra library, In Proceedings of the 3rd International Conference on Simulation and Modeling Methodologies, Technologies and Applications (SIMULTECH), Reykjavik, Iceland, 2013, 49–57. |
[13] |
S. Hafstein, Simulation and Modeling Methodologies, Technologies and Applications, volume 873 of Advances in Intelligent Systems and Computing, chapter Fast Algorithms for Computing Continuous Piecewise Affine Lyapunov Functions, Springer, 2019,274–299. |
[14] |
S. Hafstein and A. Valfells, Study of dynamical systems by fast numerical computation of Lyapunov functions, In Proceedings of the 14th International Conference on Dynamical Systems: Theory and Applications (DSTA), Mathematical and Numerical Aspects of Dynamical System Analysis, 2017,220–240. |
[15] |
W. Hahn, Stability of Motion, Springer-Verlag New York, Inc., New York, 1967. |
[16] |
R. Kamyar and M. Peet,
Polynomial optimization with applications to stability analysis and control – alternatives to sum of squares, Discrete Contin. Dyn. Syst. Ser. B, 20 (2015), 2383-2417.
doi: 10.3934/dcdsb.2015.20.2383. |
[17] | |
[18] |
A. M. Lyapunov,
The general problem of the stability of motion, Internat. J. Control, 55 (1992), 521-790.
doi: 10.1080/00207179208934253. |
[19] |
S. Marinósson,
Lyapunov function construction for ordinary differential equations with linear programming, Dyn. Syst., 17 (2002), 137-150.
doi: 10.1080/0268111011011847. |
[20] |
P. Parrilo, Structured Semidefinite Programs and Semialgebraic Geometry Methods in Robustness and Optimiza, Ph.D thesis, California Institute of Technology, Pasadena, California, 2000. |
[21] |
S. Ratschan and Z. She,
Providing a basin of attraction to a target region of polynomial systems by computation of Lyapunov-like functions, SIAM J. Control Optim., 48 (2010), 4377-4394.
doi: 10.1137/090749955. |
[22] |
S. Sastry, Nonlinear Systems: Analysis, Stability, and Control, Springer-Verlag, New York, 1999.
doi: 10.1007/978-1-4757-3108-8. |
[23] |
J. Sherman and W. Morrison,
Adjustment of an inverse matrix corresponding to a change in one element of a given matrix, Ann. Math. Statistics, 21 (1950), 124-127.
doi: 10.1214/aoms/1177729893. |
[24] |
G. Valmorbida and J. Anderson,
Region of attraction estimation using invariant sets and rational Lyapunov functions, Automatica J. IFAC, 75 (2017), 37-45.
doi: 10.1016/j.automatica.2016.09.003. |
[25] |
A. Vannelli and M. Vidyasagar,
Maximal Lyapunov functions and domains of attraction for autonomous nonlinear systems, Automatica J. IFAC, 21 (1985), 69-80.
doi: 10.1016/0005-1098(85)90099-8. |
[26] |
M. Vidyasagar, Nonlinear System Analysis, 2nd edition, Classics in Applied Mathematics, vol. 42, SIAM, Philadelphia, PA, 2002.
doi: 10.1137/1.9780898719185. |
[27] |
T. Yoshizawa, Stability Theory by Liapunov's Second Method, Publications of the Mathematical Society of Japan, No. 9. The Mathematical Society of Japan, Tokyo, 1966. |
[28] |
V. I. Zubov, Methods of A. M. Lyapunov and Their Application, P. Noordhoff Ltd., Groningen, 1964. |






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