Nonlinear control of unsteady finite-amplitude perturbations in the Blasius boundary-layer flow [PDF]
, 2013 The present work provides an optimal control strategy, based on the nonlinear Navier–Stokes equations, aimed at hampering the rapid growth of unsteady finite-amplitude perturbations in a Blasius boundary-layer flow.
DE PALMA, Pietro +2 more
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Stability and Stabilization of a Class of Boundary Control Systems [PDF]
, 2005 We study a class of partial differential equations on a one dimensional spatial domain with control and observation at the boundary. For this class of systems we describe how to obtain an impedance energy-preserving system, as well as scattering energy ...
Schaft, A.J. van der, +15 more
core +1 more source
Boundary control for transport equations
Mathematical Control and Related Fields, 2023 This paper considers two types of boundary control problems for linear transport equations. The first one shows that transport solutions on a subdomain of a domain X can be controlled exactly from incoming boundary conditions for X under appropriate convexity assumptions.
Bal, Guillaume, Jollivet, Alexandre
openaire +4 more sources
Vibration Suppression of a Flexible Riser by Boundary Iterative Learning Control
IEEE Access, 2019 This paper studies the vibration suppression problem of nonlinear flexible riser systems subjected to external disturbances. For suppressing the vibration and improving the control precision, a novel joint control method which includes boundary control ...
Yu Liu, Qiongyao Zhang, Yun Fu
doaj +1 more source
Semidiscrete approximations of optimal Robin boundary control problems constrained by semilinear parabolic PDE [PDF]
, 2006 An optimal Robin boundary control problem associated with semilinear parabolic partial differential equations is considered. Existence of an optimal solution is proved and an optimality system of equations is derived.
Chrysafinos, K +5 more
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Adaptive Control for an Aircraft Wing System with Hysteresis Nonlinearity
Mathematics, 2023 This paper involves a novel adaptive control approach of a flexible wing system with hysteresis nonlinearity. The usual control design strategies based on the ordinary differential equations (ODEs) are inapplicable due to the flexible wing system ...
Yi Qin +4 more
doaj +1 more source
Linear Operator Inequality and Null Controllability with Vanishing Energy for Unbounded Control Systems [PDF]
, 2013 We consider a linear boundary or point control system on a Hilbert space $H$ which is null controllable at some time $T_0 >0$. To every initial state $ y_0 \in H$ we associate the minimal ``energy'' needed to transfer $ y_0 $ to $ 0 $ in a time $ T \ge ...
Zabczyk, J. +7 more
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The minimal seed of turbulent transition in the boundary layer [PDF]
, 2011 This paper describes a scenario of transition from laminar to turbulent flow in a spatially developing boundary layer over a flat plate. The base flow is the Blasius non-parallel flow solution; it is perturbed by optimal disturbances yielding the largest
DE PALMA, Pietro +8 more
core +1 more source
Boundary control for the processes, described by hyperbolic systems
Vestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2013 The boundary control problem for the system of hyperbolic equations with the mixed derivative is considered.The control is provided by the displacement (in the conditions of the first boundary-value problem).The coefficient matrices of different ...
Aleksandr Anatol'evich Andreev +2 more
doaj +1 more source
The flow structure behind vortex generators embedded in a decelerating turbulent boundary layer [PDF]
, 2009 The objective of the present work is to analyse the behaviour of a turbulent decelerating boundary layer under the effect of both passive and active jets vortex generators (VGs).
Braud, Caroline +3 more
core +1 more source