Identification of a plasma actuated open-cavity under flow control
Year: 2025
Type: article
Abstract: This paper addresses an input-output identification problem for a simulated incompressible open cavity flow. Despite the highly nonlinear and infinite-dimensional nature of the system, we look for a low complexity, linear, finite-dimensional model still capable of capturing the most salient features of the system. The inherent system instability, leading to the formation of its characteristic limit cycle, is a major obstacle in the application of classical identification schemes. To overcome such difficulty, we adopt a closed-loop identification method, which requires a preventive stabilization via an empirically designed controller. Being the controller perfectly known, an indirect approach is pursued. It consists of identiflying the closed-loop transfer function and then reconstructing the unstable open-loop model by loop inversion. Extensive experiments led us to opt for a frequency domain identification based on an Output Error model structure. The identified model proves to be consistent with the infinite-dimensional one and, in particular, to reproduce its main instabilities.
Source: IFAC-PapersOnLine
Institutions: Centre National de la Recherche Scientifique, Université Paris-Saclay, Laboratoire des signaux et systèmes, CentraleSupélec, École Nationale Supérieure de Techniques Avancées, Institut Polytechnique de Paris, Institut des Sciences de la Mécanique et Applications Industrielles, École Nationale Supérieure de Techniques Avancées Paris, Laboratoire Interdisciplinaire des Sciences du Numérique
Language: English
Subfield: Control and Systems Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W4414706229