Advances in Differential Equations

Optimal boundary control and Riccati theory for abstract dynamics motivated by hybrid systems of PDEs

Paolo Acquistapace, Francesca Bucci, and Irena Lasiecka

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We study the quadratic optimal control problem over a finite time horizon for a class of abstract systems with analytic underlying semigroup $e^{tA}$ and unbounded control operator $B$. It is assumed that a suitable decomposition of the operator $B^*e^{tA^*}$ is valid, where only one component satisfies a `singular estimate', whereas for the other component specific regularity properties hold. Under these conditions, we prove well posedness of the associated differential Riccati equation, and in particular that the gain operator is bounded on a dense set. In spite of the unifying abstract framework used, the prime motivation (and application) of the resulting theory of linear-quadratic problems comes from optimal boundary control of a thermoelastic system with clamped boundary conditions. The non-trivial trace regularity estimate showing that this PDE mixed problem fits into the distinct class of models under examination---for which we have developed the present, novel optimal control theory---is established, as well.

Article information

Adv. Differential Equations, Volume 10, Number 12 (2005), 1389-1436.

First available in Project Euclid: 18 December 2012

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Mathematical Reviews number (MathSciNet)

Zentralblatt MATH identifier

Primary: 49N10: Linear-quadratic problems
Secondary: 49J20: Optimal control problems involving partial differential equations 74F05: Thermal effects 74K20: Plates 74M05: Control, switches and devices ("smart materials") [See also 93Cxx] 93C20: Systems governed by partial differential equations


Acquistapace, Paolo; Bucci, Francesca; Lasiecka, Irena. Optimal boundary control and Riccati theory for abstract dynamics motivated by hybrid systems of PDEs. Adv. Differential Equations 10 (2005), no. 12, 1389--1436.

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