Strong stabilization of (almost) impedance passive systems by static output feedback

Ruth F. Curtain; George Weiss

doi:10.3934/mcrf.2019045

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December 2019, 9(4): 643-671. doi: 10.3934/mcrf.2019045

Strong stabilization of (almost) impedance passive systems by static output feedback

Ruth F. Curtain ^1, and George Weiss ^2,*,

1.	Dept. of Mathematics, University of Groningen, 9700 AV Groningen, The Netherlands
2.	School of Electrical Eng., Tel Aviv University, Ramat Aviv 69978, Israel

*The second author is the coordinator of the ETN network ConFlex, funded by the European Union’s Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant agreement no. 765579

Received July 2018 Revised August 2019 Published November 2019

The plant to be stabilized is a system node $ \Sigma $ with generating triple $ (A,B,C) $ and transfer function $ {\bf G} $, where $ A $ generates a contraction semigroup on the Hilbert space $ X $. The control and observation operators $ B $ and $ C $ may be unbounded and they are not assumed to be admissible. The crucial assumption is that there exists a bounded operator $ E $ such that, if we replace $ {\bf G}(s) $ by $ {\bf G}(s)+E $, the new system $ \Sigma_E $ becomes impedance passive. An easier case is when $ {\bf G} $ is already impedance passive and a special case is when $ \Sigma $ has colocated sensors and actuators. Such systems include many wave, beam and heat equations with sensors and actuators on the boundary. It has been shown for many particular cases that the feedback $ u = - {\kappa} y+v $, where $ u $ is the input of the plant and $ {\kappa}>0 $, stabilizes $ \Sigma $, strongly or even exponentially. Here, $ y $ is the output of $ \Sigma $ and $ v $ is the new input. Our main result is that if for some $ E\in {\mathcal L}(U) $, $ \Sigma_E $ is impedance passive, and $ \Sigma $ is approximately observable or approximately controllable in infinite time, then for sufficiently small $ {\kappa} $ the closed-loop system is weakly stable. If, moreover, $ \sigma(A)\cap i {\mathbb R} $ is countable, then the closed-loop semigroup and its dual are both strongly stable.

Keywords: System node, well-posed linear system, impedance passive system, contraction semigroup, positive transfer function, scattering passive system, output feedback, colocated, weak stability, strong stability.

Mathematics Subject Classification: Primary: 93C25; Secondary: 95B2.

Citation: Ruth F. Curtain, George Weiss. Strong stabilization of (almost) impedance passive systems by static output feedback. Mathematical Control and Related Fields, 2019, 9 (4) : 643-671. doi: 10.3934/mcrf.2019045

References:

[1]	K. Ammari, Z. Liu and M. Tucsnak, Decay rates for a beam with pointwise force and moment feedback, Mathematics of Control, Signals and Systems, 15 (2002), 229-255. doi: 10.1007/s004980200009.
[2]	W. Arendt and C. J. K. Batty, Tauberian theorems and stability of one-parameter semigroups, Trans. of the American Mathematical Society, 306 (1988), 837–852. doi: 10.1090/S0002-9947-1988-0933321-3.
[3]	W. Arendt, C. J. K. Batty, M. Hieber and F. Neubrander., Vector-valued Laplace Transforms and Cauchy Problems, Birkhäuser Verlag, Basel, 2001. doi: 10.1007/978-3-0348-5075-9.
[4]	T. Bailey and J. E. Hubbard jr., Distributed piezoelectric polymer active vibration control of a cantilever beam, AIAA Journal on Guidance, Control and Dynamics, 8 (1985), 605-611. doi: 10.2514/3.20029.
[5]	A. V. Balakrishnan, Compensator design for stability enhancement with collocated controllers, IEEE Trans. Autom. Control, 36 (1991), 994-1007. doi: 10.1109/9.83531.
[6]	A. V. Balakrishnan, Shape control of plates with piezo actuators and collocated position / rate sensors, Applied Math. and Comput., 63 (1994), 213-234. doi: 10.1016/0096-3003(94)90196-1.
[7]	C. J. K. Batty and V. Q. Phong, Stability of individual elements under one-parameter semigroups, Trans. Amer. Math. Soc., 322 (1990), 805-818. doi: 10.1090/S0002-9947-1990-1022866-5.
[8]	C. D. Benchimol, A note on weak stabilizability of contraction semigroups, SIAM Journal on Control and Optim., 16 (1978), 373-379. doi: 10.1137/0316023.
[9]	J. Bontsema, Dynamic Stabilization of Large Flexible Space Structures, Ph.D.Thesis, Rijksuniversiteit Groningen, The Netherlands, 1989.
[10]	R. F. Curtain and G. Weiss, Well-posedness of triples of operators (in the sense of linear systems theory), Control and Estimation of Distributed Parameter Systems (F. Kappel, K. Kunisch, W. Schappacher, eds.), 41–59, Birkhäuser-Verlag, Basel, 1989.
[11]	R. F. Curtain and G. Weiss, Exponential stabilization of well-posed systems by colocated feedback, SIAM J. Control and Optim., 45 (2006), 273-297. doi: 10.1137/040610489.
[12]	R. F. Curtain and H. J. Zwart, An Introduction to Infinite-Dimensional Linear Systems Theory, Springer-Verlag, New York, 1995. doi: 10.1007/978-1-4612-4224-6.
[13]	R. F. Curtain and B. Jacob, Spectral properties of pseudo-resolvents under structured perturbations, Mathematics of Control, Signals and Systems, 21 (2008), 21-50. doi: 10.1007/s00498-008-0035-y.
[14]	E. B. Davies, One-Parameter Semigroups, Academic Press, London, 1980.
[15]	K. Engel and R. Nagel, One-parameter Semigroups for Linear Evolution Equations, Graduate Texts in Math. vol. 194, Springer-Verlag, New York, 2000.
[16]	J. S. Gibson, A note on stabilization of infinite dimensional linear oscillators by compact feedback, SIAM J. Control and Optim., 18 (1980), 311-316. doi: 10.1137/0318022.
[17]	Y. Le Gorrec, H. J. Zwart and B. Maschke, Dirac structures and boundary control systems associated with skew-symmetric differential operators., SIAM J. of Control and Optim., 44 (2005), 1864-1892. doi: 10.1137/040611677.
[18]	B.-Z. Guo and Z.-H. Luo, Controllability and stability of a second-order hyperbolic system with colocated sensor/actuator, Systems & Control Letters, 46 (2002), 45-65. doi: 10.1016/S0167-6911(01)00201-8.
[19]	A. Haraux, Une remarque sur la stabilisation de certains systèmes du deuxième ordre en temps, Portugaliae Mathematica, 46 (1989), 245-258.
[20]	I. Lasiecka and R. Triggiani, $L_2(\Sigma)$-regular ity of the boundary to boundary operator $B^L$ for hyperbolic and Petrowski PDE's, Abstract and Applied Analysis, 2003* (2003), 1061-1139. doi: 10.1155/S1085337503305032.
[21]	I. Lasiecka and R. Triggiani, Control Theory for Partial Differential Equations: Continuous and Approximation Theories. II, Abstract Hyperbolic-type Systems over a Finite Time Horizon, Encyclopedia of Mathematics and its Applications, 75, Cambridge University Press, Cambridge, 2000. doi: 10.1017/CBO9780511574801.002.
[22]	K. Liu, Local distributed control and damping for the conservative systems, SIAM J. Control and Optim., 35 (1997), 1574-1590. doi: 10.1137/S0363012995284928.
[23]	M. S. Livšsic, Operators, Oscillations, Waves (Open Systems), volume 34 of Translations of Mathematical Monographs. American Mathematical Society, Providence, Rhode Island, 1973.
[24]	Y. I. Lyubich and V. Q. Phong, Asymptotic stability of linear differential equations in Banach spaces, Studia Math., 88 (1988), 37-42. doi: 10.4064/sm-88-1-37-42.
[25]	Z.-H. Luo, B.-Z. Guo and O. Morgul, Stability and Stabilization of Infinite Dimensional Systems with Applications, Springer-Verlag, London, 1999. doi: 10.1007/978-1-4471-0419-3.
[26]	J. Malinen, O. J. Staffans and G. Weiss, When is a linear system conservative?, Quarterly of Applied Math., 64 (2006), 61-91. doi: 10.1090/S0033-569X-06-00994-7.
[27]	B. Sz.-Nagy and C. Foias, Harmonic Analysis of Operators on Hilbert Space, North-Holland, Amsterdam, 1970 (transl. of the French edition of 1967).
[28]	J. C. Oostveen, Strongly Stabilizable Infinite-Dimensional Systems, Frontiers in Applied Mathematics, SIAM, Philadelphia, 2000.
[29]	M. R. Opmeer, Infinite-dimensional linear systems: A distributional approach, Proc. London Math. Society, 91 (2005), 738-760. doi: 10.1112/S0024611505015315.
[30]	M. Rosenblum and J. Rovnyak, Hardy Classes and Operator Theory, Oxford University Press, Oxford, 1985.
[31]	W. Rudin, Real and Complex Analysis, McGraw-Hill, New York, 1966.
[32]	D. L. Russell, Linear stabilization of the linear oscillator in Hilbert space, J. Math. and Applications, 25 (1969), 663-675. doi: 10.1016/0022-247X(69)90264-9.
[33]	D. Salamon, Infinite dimensional systems with unbounded control and observation: A functional analytic approach, Trans. Amer. Math. Soc., 300 (1987), 383-431. doi: 10.2307/2000351.
[34]	A. van der Schaft, $L_2$-Gain and Passivity Techniques in Nonlinear Control, second (enlarged) edition, Springer-Verlag, London, 2000. doi: 10.1007/978-1-4471-0507-7.
[35]	M. Slemrod, A note on complete controllability and stabilizability for linear control systems in Hilbert space, SIAM J. Control and Optim., 12 (1974), 500-508. doi: 10.1137/0312038.
[36]	M. Slemrod, Stabilization of boundary control systems, J. of Differential Equations, 22 (1976), 402-415. doi: 10.1016/0022-0396(76)90036-X.
[37]	M. Slemrod, Feedback stabilization of a linear control system in Hilbert space with an a priori bounded control, Math. of Control, Signals and Systems, 2 (1989), 265-285. doi: 10.1007/BF02551387.
[38]	O. J. Staffans, Quadratic optimal control of stable well-posed linear systems, Trans. American Math. Society, 349 (1997), 3679-3715. doi: 10.1090/S0002-9947-97-01863-1.
[39]	O. J. Staffans, Passive and conservative continuous-time impedance and scattering systems. Part I: Well-posed systems, Math. Control, Signals and Systems, 15 (2002), 291-315. doi: 10.1007/s004980200012.
[40]	O. J. Staffans, Stabilization by collocated feedback, Directions in Mathematical Systems Theory and Optimization, A. Rantzer and C.I. Byrnes, eds, LNCIS, vol. 286, Springer-Verlag, Berlin, 2003, 275–292. doi: 10.1007/3-540-36106-5_21.
[41]	O. J. Staffans, Passive and conservative infinite-dimensional impedance and scattering systems (from a personal point of view), In Mathematical Systems Theory in Biology, Communication, Computation, and Finance, volume 134 of IMA Volumes in Mathematics and its Applications, pages 375–413. Springer-Verlag, New York, 2002. doi: 10.1007/978-0-387-21696-6_14.
[42]	O. J. Staffans, Well-Posed Linear Systems, Cambridge University Press, Cambridge, UK, 2005. doi: 10.1017/CBO9780511543197.
[43]	O. J. Staffans and G. Weiss, Transfer functions of regular linear systems, Part II: The system operator and the Lax-Phillips semigroup, Trans. American Math. Society, 354 (2002), 3229-3262. doi: 10.1090/S0002-9947-02-02976-8.
[44]	V. L. Syrmos, C. T. Abdallah, P. Dorato and K. Grigoriadis, Static output feedback - A survey, Automatica, 33 (1997), 125-137. doi: 10.1016/S0005-1098(96)00141-0.
[45]	R. Triggiani, Lack of uniform stabilization for noncontractive semigroups under compact perturbations, Proc. Amer. Math. Soc., 105 (1989), 375-383. doi: 10.1090/S0002-9939-1989-0953013-0.
[46]	R. Triggiani, Wave equation on a bounded domain with boundary dissipation: an operator approach, J. Math. Anal. Appl., 137 (1989), 438-461. doi: 10.1016/0022-247X(89)90255-2.
[47]	M. Tucsnak and G. Weiss, How to get a conservative well-posed linear system out of thin air. Part II: Controllability and stability, SIAM J. Control and Optim., 42 (2003), 907-935. doi: 10.1137/S0363012901399295.
[48]	J. A. Villegas, H. Zwart, Y. Le Gorrec, B. Maschke and A. J. van der Schaft, Stability and stabilization of a class of boundary control systems, Proc. 44th IEEE Conference on Decision and Control and the European Control Conference, Seville, Spain, (2005), 3850–3855.
[49]	G. Weiss, Admissibility of unbounded control operators, SIAM J. Control and Optim., 27 (1989), 527-545. doi: 10.1137/0327028.
[50]	G. Weiss, Transfer functions of regular linear systems, Part I: Characterizations of regularity, Trans. Amer. Math. Society, 342 (1994), 827-854. doi: 10.2307/2154655.
[51]	G. Weiss, Regular linear systems with feedback, Mathematics of Control, Signals and Systems, 7 (1994), 23-57. doi: 10.1007/BF01211484.
[52]	G. Weiss, Optimal control of systems with a unitary semigroup and with colocated control and observation, Systems & Control Letters, 48 (2003), 329-340. doi: 10.1016/S0167-6911(02)00276-1.
[53]	G. Weiss and R. F. Curtain, Exponential stabilization of a Rayleigh beam using colocated control, IEEE Trans. on Automatic Control, 53 (2008), 643-654. doi: 10.1109/TAC.2008.919849.
[54]	G. Weiss and R. Rebarber, Optimizability and estimatability for infinite-dimensional linear systems, SIAM J. Control and Optim., 39 (2001), 1204-1232. doi: 10.1137/S036301299833519X.
[55]	G. Weiss, O. J. Staffans and M. Tucsnak, Well-posed linear systems -a survey with emphasis on conservative systems, Int. J. Appl. Math. Comput. Sci., 11 (2001), 7-33.
[56]	G. Weiss and M. Tucsnak, How to get a conservative well-posed linear system out of thin air. Part I: Well-posedness and energy balance, ESAIM-COCV, 9 (2003), 247-274. doi: 10.1051/cocv:2003012.
[57]	G. Weiss and C.-Z. Xu, Spectral properties of infinite-dimensional closed-loop systems, Mathematics of Control, Signals and Systems, 17 (2005), 153-172. doi: 10.1007/s00498-005-0154-7.
[58]	J. C. Willems, Dissipative dynamical systems. Part I: General theory. Part II: Linear systems with quadratic supply rates, Arch. Ration. Mech. Anal., 45 (1972), 321-351. doi: 10.1007/BF00276493.
[59]	Y. You, Dynamical boundary control of two-dimensional Petrovsky system: Vibrating rectangular plate, In A. Bensoussan and J.-L. Lions, editors, Analysis and Optimization of Systems, volume 111 of LNCIS, 519–530. Springer-Verlag, Heidelberg, 1988. doi: 10.1007/BFb0042241.

show all references

References:

[1]	K. Ammari, Z. Liu and M. Tucsnak, Decay rates for a beam with pointwise force and moment feedback, Mathematics of Control, Signals and Systems, 15 (2002), 229-255. doi: 10.1007/s004980200009.
[2]	W. Arendt and C. J. K. Batty, Tauberian theorems and stability of one-parameter semigroups, Trans. of the American Mathematical Society, 306 (1988), 837–852. doi: 10.1090/S0002-9947-1988-0933321-3.
[3]	W. Arendt, C. J. K. Batty, M. Hieber and F. Neubrander., Vector-valued Laplace Transforms and Cauchy Problems, Birkhäuser Verlag, Basel, 2001. doi: 10.1007/978-3-0348-5075-9.
[4]	T. Bailey and J. E. Hubbard jr., Distributed piezoelectric polymer active vibration control of a cantilever beam, AIAA Journal on Guidance, Control and Dynamics, 8 (1985), 605-611. doi: 10.2514/3.20029.
[5]	A. V. Balakrishnan, Compensator design for stability enhancement with collocated controllers, IEEE Trans. Autom. Control, 36 (1991), 994-1007. doi: 10.1109/9.83531.
[6]	A. V. Balakrishnan, Shape control of plates with piezo actuators and collocated position / rate sensors, Applied Math. and Comput., 63 (1994), 213-234. doi: 10.1016/0096-3003(94)90196-1.
[7]	C. J. K. Batty and V. Q. Phong, Stability of individual elements under one-parameter semigroups, Trans. Amer. Math. Soc., 322 (1990), 805-818. doi: 10.1090/S0002-9947-1990-1022866-5.
[8]	C. D. Benchimol, A note on weak stabilizability of contraction semigroups, SIAM Journal on Control and Optim., 16 (1978), 373-379. doi: 10.1137/0316023.
[9]	J. Bontsema, Dynamic Stabilization of Large Flexible Space Structures, Ph.D.Thesis, Rijksuniversiteit Groningen, The Netherlands, 1989.
[10]	R. F. Curtain and G. Weiss, Well-posedness of triples of operators (in the sense of linear systems theory), Control and Estimation of Distributed Parameter Systems (F. Kappel, K. Kunisch, W. Schappacher, eds.), 41–59, Birkhäuser-Verlag, Basel, 1989.
[11]	R. F. Curtain and G. Weiss, Exponential stabilization of well-posed systems by colocated feedback, SIAM J. Control and Optim., 45 (2006), 273-297. doi: 10.1137/040610489.
[12]	R. F. Curtain and H. J. Zwart, An Introduction to Infinite-Dimensional Linear Systems Theory, Springer-Verlag, New York, 1995. doi: 10.1007/978-1-4612-4224-6.
[13]	R. F. Curtain and B. Jacob, Spectral properties of pseudo-resolvents under structured perturbations, Mathematics of Control, Signals and Systems, 21 (2008), 21-50. doi: 10.1007/s00498-008-0035-y.
[14]	E. B. Davies, One-Parameter Semigroups, Academic Press, London, 1980.
[15]	K. Engel and R. Nagel, One-parameter Semigroups for Linear Evolution Equations, Graduate Texts in Math. vol. 194, Springer-Verlag, New York, 2000.
[16]	J. S. Gibson, A note on stabilization of infinite dimensional linear oscillators by compact feedback, SIAM J. Control and Optim., 18 (1980), 311-316. doi: 10.1137/0318022.
[17]	Y. Le Gorrec, H. J. Zwart and B. Maschke, Dirac structures and boundary control systems associated with skew-symmetric differential operators., SIAM J. of Control and Optim., 44 (2005), 1864-1892. doi: 10.1137/040611677.
[18]	B.-Z. Guo and Z.-H. Luo, Controllability and stability of a second-order hyperbolic system with colocated sensor/actuator, Systems & Control Letters, 46 (2002), 45-65. doi: 10.1016/S0167-6911(01)00201-8.
[19]	A. Haraux, Une remarque sur la stabilisation de certains systèmes du deuxième ordre en temps, Portugaliae Mathematica, 46 (1989), 245-258.
[20]	I. Lasiecka and R. Triggiani, $L_2(\Sigma)$-regular ity of the boundary to boundary operator $B^L$ for hyperbolic and Petrowski PDE's, Abstract and Applied Analysis, 2003* (2003), 1061-1139. doi: 10.1155/S1085337503305032.
[21]	I. Lasiecka and R. Triggiani, Control Theory for Partial Differential Equations: Continuous and Approximation Theories. II, Abstract Hyperbolic-type Systems over a Finite Time Horizon, Encyclopedia of Mathematics and its Applications, 75, Cambridge University Press, Cambridge, 2000. doi: 10.1017/CBO9780511574801.002.
[22]	K. Liu, Local distributed control and damping for the conservative systems, SIAM J. Control and Optim., 35 (1997), 1574-1590. doi: 10.1137/S0363012995284928.
[23]	M. S. Livšsic, Operators, Oscillations, Waves (Open Systems), volume 34 of Translations of Mathematical Monographs. American Mathematical Society, Providence, Rhode Island, 1973.
[24]	Y. I. Lyubich and V. Q. Phong, Asymptotic stability of linear differential equations in Banach spaces, Studia Math., 88 (1988), 37-42. doi: 10.4064/sm-88-1-37-42.
[25]	Z.-H. Luo, B.-Z. Guo and O. Morgul, Stability and Stabilization of Infinite Dimensional Systems with Applications, Springer-Verlag, London, 1999. doi: 10.1007/978-1-4471-0419-3.
[26]	J. Malinen, O. J. Staffans and G. Weiss, When is a linear system conservative?, Quarterly of Applied Math., 64 (2006), 61-91. doi: 10.1090/S0033-569X-06-00994-7.
[27]	B. Sz.-Nagy and C. Foias, Harmonic Analysis of Operators on Hilbert Space, North-Holland, Amsterdam, 1970 (transl. of the French edition of 1967).
[28]	J. C. Oostveen, Strongly Stabilizable Infinite-Dimensional Systems, Frontiers in Applied Mathematics, SIAM, Philadelphia, 2000.
[29]	M. R. Opmeer, Infinite-dimensional linear systems: A distributional approach, Proc. London Math. Society, 91 (2005), 738-760. doi: 10.1112/S0024611505015315.
[30]	M. Rosenblum and J. Rovnyak, Hardy Classes and Operator Theory, Oxford University Press, Oxford, 1985.
[31]	W. Rudin, Real and Complex Analysis, McGraw-Hill, New York, 1966.
[32]	D. L. Russell, Linear stabilization of the linear oscillator in Hilbert space, J. Math. and Applications, 25 (1969), 663-675. doi: 10.1016/0022-247X(69)90264-9.
[33]	D. Salamon, Infinite dimensional systems with unbounded control and observation: A functional analytic approach, Trans. Amer. Math. Soc., 300 (1987), 383-431. doi: 10.2307/2000351.
[34]	A. van der Schaft, $L_2$-Gain and Passivity Techniques in Nonlinear Control, second (enlarged) edition, Springer-Verlag, London, 2000. doi: 10.1007/978-1-4471-0507-7.
[35]	M. Slemrod, A note on complete controllability and stabilizability for linear control systems in Hilbert space, SIAM J. Control and Optim., 12 (1974), 500-508. doi: 10.1137/0312038.
[36]	M. Slemrod, Stabilization of boundary control systems, J. of Differential Equations, 22 (1976), 402-415. doi: 10.1016/0022-0396(76)90036-X.
[37]	M. Slemrod, Feedback stabilization of a linear control system in Hilbert space with an a priori bounded control, Math. of Control, Signals and Systems, 2 (1989), 265-285. doi: 10.1007/BF02551387.
[38]	O. J. Staffans, Quadratic optimal control of stable well-posed linear systems, Trans. American Math. Society, 349 (1997), 3679-3715. doi: 10.1090/S0002-9947-97-01863-1.
[39]	O. J. Staffans, Passive and conservative continuous-time impedance and scattering systems. Part I: Well-posed systems, Math. Control, Signals and Systems, 15 (2002), 291-315. doi: 10.1007/s004980200012.
[40]	O. J. Staffans, Stabilization by collocated feedback, Directions in Mathematical Systems Theory and Optimization, A. Rantzer and C.I. Byrnes, eds, LNCIS, vol. 286, Springer-Verlag, Berlin, 2003, 275–292. doi: 10.1007/3-540-36106-5_21.
[41]	O. J. Staffans, Passive and conservative infinite-dimensional impedance and scattering systems (from a personal point of view), In Mathematical Systems Theory in Biology, Communication, Computation, and Finance, volume 134 of IMA Volumes in Mathematics and its Applications, pages 375–413. Springer-Verlag, New York, 2002. doi: 10.1007/978-0-387-21696-6_14.
[42]	O. J. Staffans, Well-Posed Linear Systems, Cambridge University Press, Cambridge, UK, 2005. doi: 10.1017/CBO9780511543197.
[43]	O. J. Staffans and G. Weiss, Transfer functions of regular linear systems, Part II: The system operator and the Lax-Phillips semigroup, Trans. American Math. Society, 354 (2002), 3229-3262. doi: 10.1090/S0002-9947-02-02976-8.
[44]	V. L. Syrmos, C. T. Abdallah, P. Dorato and K. Grigoriadis, Static output feedback - A survey, Automatica, 33 (1997), 125-137. doi: 10.1016/S0005-1098(96)00141-0.
[45]	R. Triggiani, Lack of uniform stabilization for noncontractive semigroups under compact perturbations, Proc. Amer. Math. Soc., 105 (1989), 375-383. doi: 10.1090/S0002-9939-1989-0953013-0.
[46]	R. Triggiani, Wave equation on a bounded domain with boundary dissipation: an operator approach, J. Math. Anal. Appl., 137 (1989), 438-461. doi: 10.1016/0022-247X(89)90255-2.
[47]	M. Tucsnak and G. Weiss, How to get a conservative well-posed linear system out of thin air. Part II: Controllability and stability, SIAM J. Control and Optim., 42 (2003), 907-935. doi: 10.1137/S0363012901399295.
[48]	J. A. Villegas, H. Zwart, Y. Le Gorrec, B. Maschke and A. J. van der Schaft, Stability and stabilization of a class of boundary control systems, Proc. 44th IEEE Conference on Decision and Control and the European Control Conference, Seville, Spain, (2005), 3850–3855.
[49]	G. Weiss, Admissibility of unbounded control operators, SIAM J. Control and Optim., 27 (1989), 527-545. doi: 10.1137/0327028.
[50]	G. Weiss, Transfer functions of regular linear systems, Part I: Characterizations of regularity, Trans. Amer. Math. Society, 342 (1994), 827-854. doi: 10.2307/2154655.
[51]	G. Weiss, Regular linear systems with feedback, Mathematics of Control, Signals and Systems, 7 (1994), 23-57. doi: 10.1007/BF01211484.
[52]	G. Weiss, Optimal control of systems with a unitary semigroup and with colocated control and observation, Systems & Control Letters, 48 (2003), 329-340. doi: 10.1016/S0167-6911(02)00276-1.
[53]	G. Weiss and R. F. Curtain, Exponential stabilization of a Rayleigh beam using colocated control, IEEE Trans. on Automatic Control, 53 (2008), 643-654. doi: 10.1109/TAC.2008.919849.
[54]	G. Weiss and R. Rebarber, Optimizability and estimatability for infinite-dimensional linear systems, SIAM J. Control and Optim., 39 (2001), 1204-1232. doi: 10.1137/S036301299833519X.
[55]	G. Weiss, O. J. Staffans and M. Tucsnak, Well-posed linear systems -a survey with emphasis on conservative systems, Int. J. Appl. Math. Comput. Sci., 11 (2001), 7-33.
[56]	G. Weiss and M. Tucsnak, How to get a conservative well-posed linear system out of thin air. Part I: Well-posedness and energy balance, ESAIM-COCV, 9 (2003), 247-274. doi: 10.1051/cocv:2003012.
[57]	G. Weiss and C.-Z. Xu, Spectral properties of infinite-dimensional closed-loop systems, Mathematics of Control, Signals and Systems, 17 (2005), 153-172. doi: 10.1007/s00498-005-0154-7.
[58]	J. C. Willems, Dissipative dynamical systems. Part I: General theory. Part II: Linear systems with quadratic supply rates, Arch. Ration. Mech. Anal., 45 (1972), 321-351. doi: 10.1007/BF00276493.
[59]	Y. You, Dynamical boundary control of two-dimensional Petrovsky system: Vibrating rectangular plate, In A. Bensoussan and J.-L. Lions, editors, Analysis and Optimization of Systems, volume 111 of LNCIS, 519–530. Springer-Verlag, Heidelberg, 1988. doi: 10.1007/BFb0042241.

Figure 1. The open-loop system node $ \Sigma $ with static output feedback. If $ {\kappa}>0 $ is sufficiently small, then this feedback results in a closed-loop system $ \Sigma^ {\kappa} $ that is well-posed and system stable. Under suitable additional assumptions, the operator semigroup of $ \Sigma^ {\kappa} $ and its dual are strongly stable

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Figure 2. The scattering passive system $ \Sigma^s $ with input $ u^s $ and output $ y^s $, obtained from the impedance passive system node $ \Sigma^p $ via the diagonal transformation, as in Proposition 4.1

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Figure 3. The feedback system $ \Sigma^ {\kappa} $ from Figure 1, with input $ v $ and output $ y $, as obtained from the scattering passive system $ \Sigma^s $ with input $ u^s $ and output $ y^s $. Note that there is no feedback loop involved in this transformation

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2020 Impact Factor: 1.284

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2020 Impact Factor: 1.284

American Institute of Mathematical Sciences

Strong stabilization of (almost) impedance passive systems by static output feedback

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Strong stabilization of (almost) impedance passive systems by static output feedback

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