Mathematical Systems Theory Research Group


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List of Journal Articles:

[54] Lassi Paunonen. Robust controllers for regular linear systems with infinite-dimensional exosystems. SIAM Journal on Control & Optimization, 55(3): 1567-1597, 2017. [ preprint,  journal version,  ArXiv ]
[53] Lassi Paunonen. Robust output regulation for continuous-time periodic systems. IEEE Transactions on Automatic Control, to appear. [ preprintjournal versionArXiv ]
[52] Lassi Paunonen and David Seifert. Asymptotics for infinite systems of differential equations. SIAM Journal on Control & Optimization, 55(2): 1153-1178, 2017. [ preprint,  journal version,  ArXiv ]
[51] Lassi Paunonen and David Seifert. Asymptotic behaviour in the robot rendezvous problem. Automatica, 79: 127-130, 2017. [ preprint,  journal version,  ArXiv ]
[50] Lassi Paunonen and David Seifert. Asymptotic behaviour of coupled systems in discrete and continuous time. Journal of Dynamics and Differential Equations, published online. [ preprint,  journal version,  ArXiv  ]
[49] Lassi Paunonen. Controller design for robust output regulation of regular linear systems. IEEE Trans. Automat. Control, 61(10):2974-2986, 2016. [ preprint,  journal version,  ArXiv,  errata ]
[48] Charles J.K. Batty, Lassi Paunonen, and David Seifert. Optimal energy decay in a one-dimensional coupled wave-heat system. J. Evol. Equ., 16(3):649-664, 2016. [ preprint,  journal version,  ArXiv  ]
[47] Petteri Laakkonen. Robust regulation theory for transfer functions with a coprime factorization. IEEE Trans. Automat. Control, 61(10):3109-3114, 2016. [  journal version  ]
[46] Lassi Paunonen and Petteri Laakkonen. Polynomial input-output stability for linear systems. IEEE Trans. Automat. Control, 60(10):2797--2802, 2015. [ preprint,  journal version  ]
[45] Lassi Paunonen. Designing controllers with reduced order internal models. IEEE Trans. Automat. Control, 60(3):775--780, 2015. [ preprint,  journal version  ]
[44] Lassi Paunonen. Robustness of strong stability of discrete semigroups Systems Control Lett., 75:35-40, 2015. [ preprint,  journal version,  ArXiv  ]
[43] Petteri Laakkonen and Seppo Pohjolainen. Frequency domain robust regulation of signals generated by an infinite-dimensional exosystem. SIAM J. Control Optim., 53(1):139--166, 2015. [ preprint,  journal version  ]
[42] Lassi Paunonen and Seppo Pohjolainen. The internal model principle for systems with unbounded control and observation SIAM J. Control Optim., 52(6):3967-4000, 2014. [ final PDF,  journal version,  ArXiv  ]
[41] Lassi Paunonen. Robustness of Strong Stability of Semigroups. J. Differential Equations, 257:4403-4436 (2014). [ preprint,  journal version,  ArXiv  ]
[40] Lassi Paunonen. Polynomial stability of semigroups generated by operator matrices. J. Evol. Equ., 14(4-5):885-911 (2014). [ preprint,  journal version,  ArXiv  ]
[39] Lassi Paunonen. The role of exosystems in output regulation. IEEE Trans. Automat. Control, 59(8):2301-2305, 2014. [ preprint,  journal version  ]
[38] Lassi Paunonen and Seppo Pohjolainen. Robust output regulation and the preservation of polynomial closed-loop stability. Internat. J. Robust Nonlinear Control, 24:3409-3439, 2014 (first published online August 24th, 2013). [ preprint,  journal version  ]
[37] Lassi Paunonen and Seppo Pohjolainen. Reduced order internal models in robust output regulation. IEEE Trans. Automat. Control, 58(9):2307-2318, 2013. [ preprintjournal version ]
[36] Lassi Paunonen and Hans Zwart. A Lyapunov approach to strong stability of semigroups. Systems Control Lett., 62(8):673-678, 2013. [ preprintjournal version ]
[35] Lassi Paunonen. Robustness of polynomial stability with respect to unbounded perturbations. Systems Control Lett., 62(4):331-337, 2013. [ preprint,  journal version ]
[34] Lassi Paunonen and Seppo Pohjolainen. Robust controller design for infinite-dimensional exosystems. Internat. J. Robust Nonlinear Control, 24(5):825-858, 2014 (First published online on November 13th, 2012). [ preprint,  journal version ]
[33] Lassi Paunonen. Robustness of strongly and polynomially stable semigroups. J. Funct. Anal., 263:2555-2583, 2012. [ preprintjournal version ]
[32] Lassi Paunonen and Seppo Pohjolainen. Periodic output regulation for distributed parameter systems. Math. Control Signals Systems, 24(4):403-441, 2012. [ preprint,  journal version ]
[31] Petteri Laakkonen and Seppo Pohjolainen. Directed structure at infinity for infinite-dimensional systems. Internat. J. Control, 84(4):702-715, 2011. [ article ]
[30] Timo Hämäläinen and Seppo Pohjolainen. A self-tuning robust regulator for infinite-dimensional systems. IEEE Trans. Automat. Control, 56(9):2116-2127, 2011. [ article ]
[29] Lassi Paunonen. Perturbation of strongly and polynomially stable Riesz-spectral operators. Systems Control Lett., 60:234-248, 2011. [ preprint,  journal version ]
[28] Timo Hämäläinen and Seppo Pohjolainen. Robust regulation of distributed parameter systems with infinite-dimensional exosystems. SIAM J. Control Optim., 48(8):4846-4873, 2010. [ article ]
[27] Lassi Paunonen and Seppo Pohjolainen. Internal model theory for distributed parameter systems. SIAM J. Control Optim., 48(7):4753-4775, 2010. [ preprint,  journal version ]
[26] Eero Immonen. On the internal model structure for infinite-dimensional systems: Two common controller types and repetitive control. SIAM J. Control Optim., 45(6):2065-2093, 2007. [ article ]
[25] Eero Immonen. A simple robust controller for the approximate regulation of almost periodic signals for linear systems. IEEE Trans. Automat. Control, 52(12):2313-2324, 2007. [ article ]
[24] Eero Immonen. Practical output regulation for bounded linear infinite-dimensional state space systems. Automatica J. IFAC, 43(5):786-794, 2007. [ article ]
[23] Timo Hämäläinen and Seppo Pohjolainen. Asymptotically H2-optimal tuning of low gain robust controllers for DPS. IEEE Trans. Automat. Control, 51(10):1661-1668, 2006. [ article ]
[22] Eero Immonen. Some properties of infinite-dimensional systems capable of asymptotically tracking bounded uniformly continuous signals. Math. Control Signals Systems, 18(4):323-344, 2006. [ article ]
[21] Eero Immonen. A feedforward-feedback controller for infinite-dimensional systems and regulation of bounded uniformly continuous signals. Internat. J. Robust Nonlinear Control, 16(5):259-280, 2006. [ article ]
[20] Eero Immonen and Seppo Pohjolainen. Feedback and feedforward output regulation of bounded uniformly continuous signals for infinite-dimensional systems. SIAM J. Control Optim., 45(5):1714-1735, 2006. [ article ]
[19] Eero Immonen and Seppo Pohjolainen. What periodic signals can an exponentially stabilizable linear feedforward control system asymptotically track? SIAM J. Control Optim., 44(6):2253-2268, 2006. [ article ]
[18] Lauri Ylinen, Seppo Pohjolainen, and Timo Hämäläinen. Robust regulation of stable systems in the H-algebra. Internat. J. Control, 79(1):24-35, 2006. [ article ]
[17] Eero Immonen and Seppo Pohjolainen. Output regulation of periodic signals for DPS: An infinite-dimensional signal generator. IEEE Trans. Automat. Control, 50(11):1799-1804, 2005. [ article ]
[16] Eero Immonen. Function generators, the operator equation ΠS=AΠ+BQ and inherited dynamics in inhomogeneous Cauchy problems. J. Differential Equations, 218(2):253-272, 2005. [ article ]
[15] Eero Immonen. On sylvester operator equations, complete trajectories, regular admissibility, and stability of C0-semigroups. Electron. J. Differential Equations, 71(14), 2005. [ article ]
[14] Eero Immonen, Seppo Pohjolainen, and Timo Hämäläinen. On the realization of periodic functions. Systems Control Lett., 54(3):225-235, 2005. [ article ]
[13] Eero Immonen. On the concept of point value in the infinite-dimensional realization theory. J. Math. Anal. Appl., 300(1), 2004. [ article ]
[12] Timo Hämäläinen and Seppo Pohjolainen. On the asymptotically optimal tuning of robust controllers for systems in the CD-algebra. IEEE Trans. Automat. Control, 47(2):351-358, 2002. [ article ]
[11] Timo Hämäläinen and Seppo Pohjolainen. A finite-dimensional robust controller for systems in the CD-algebra. IEEE Trans. Automat. Control, 45(3):421-431, 2000. [ article ]
[10] Timo Hämäläinen and Seppo Pohjolainen. The design of linear controllers with symbolic algebra. Comput. Math. Appl., 32(7):105-116, 1996. [ article ]
[9] Timo Hämäläinen and Seppo Pohjolainen. Robust control and tuning problem for distributed parameter systems. Internat. J. Robust Nonlinear Control, 6(5):479-500, 1996. [ article ]
[8] Seppo Pohjolainen and M. Laaksonen. Optimal minimax controllers with a complex Remez method. Systems Science, 21(2):23-32, 1994. [ article ]
[7] Seppo Pohjolainen. On the optimal tuning of a robust controller for parabolic distributed parameter systems. Automatica J. IFAC, 23(6):719-728, 1987. [ article ]
[6] Matti Aaltonen, Juha Tanttu and Seppo Pohjolainen. A distributed parameter system simulator. Simulation, 47(4):145-151, 1986. [ article ]
[5] Heikki Koivo and Seppo Pohjolainen. Tuning of multivariable PI-controller for unknown systems with input delay. Automatica J. IFAC, 21(1):81-91, 1985. [ article ]
[4] Seppo Pohjolainen. Robust controller for systems with exponentially stable strongly continuous semigroups. J. Math. Anal. Appl., 111(2):622-636, 1985. [ article ]
[3] Seppo A. Pohjolainen. Robust multivariable PI-controller for infinite-dimensional systems. IEEE Trans. Automat. Control, AC-27(1):17-31, 1982. [ article ]
[2] Seppo Pohjolainen. Computation of Transmission Zeros for Distributed Parameter Systems. Int. J. Control, 33(2):199-212, 1981. [ article ]
[1] Seppo Pohjolainen. A feedforward controller for distributed parameter systems. Internat. J. Control, 34(1):173-184, 1981. [ article ]
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