Adaptive Control in an Axial Turbofan: Model-Free Implementation with Short Response Time

Autor:	Olaf Wiederhold, Rudibert King, Lars Neuhaus, Lars Enghardt, Bernd R. Noack, Wolfgang Neise, Marius Swoboda
Rok vydání:	2011
Předmět:	Engineering Adaptive control business.industry Flow (psychology) Process (computing) Aerospace Engineering Response time Aerodynamics Turbofan Extended Kalman filter Flow separation Control theory business Simulation
Zdroj:	AIAA Journal. 49:1429-1436
ISSN:	1533-385X 0001-1452
DOI:	10.2514/1.j050702
Popis:	An adaptive control strategy is implemented in a single-input/single-output experiment to improve the aerodynamic performance of an axial turbofan. Pulsed blowing into the blade tip region is used to prevent flow separation. A slope-seeking control approach is shown to be able to extend the operating region of the engine without an explicit process model. By this, flow separation can be mitigated for smaller flow coefficients. The proposed closed-loop control strategy is capable of both driving the system back to stable operating conditions automatically and stabilizing operation in the presence of large-amplitude disturbances. Moreover, it is possible to accelerate the closed-loop control performance by one order of magnitude, compared with classical extremum-seeking control. By this, an extended Kalman filter is applied that enables a rapid determination of gradients of the corresponding characteristic diagram.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::ff83a20a59764be36848e2f252733690 https://doi.org/10.2514/1.j050702 Zobrazit plný text záznamu