Aiaa 2003-0008 Control of Forced and Self-sustained Oscillations in the Flow past a Cavity
نویسندگان
چکیده
This paper presents a series of experiments aimed at model-based feedback control of oscillations in the compressible flow past a rectangular cavity. Zeronet-mass air injection is used with feedback from pressure transducers located inside the cavity to suppress the oscillations, and measurements of the shear layer above the cavity are made for both the natural and suppressed state. A system identification experiment is performed, and used to determine a linear model that describes the oscillations, and this model is used to derive feedback laws for acoustic suppression. The model accurately predicts the behavior of different feedback controllers, including frequencies where suppression occurs, as well as new resonant frequencies that may be introduced by the controller.
منابع مشابه
Aiaa 2002-0972 Model-based Control of Cavity Oscillations, Part Ii: System Identification and Analysis
Experiments using active control to reduce oscillations in the flow past a rectangular cavity have uncovered surprising phenomena: in the controlled system, often new frequencies of oscillation appear, and often the main frequency of oscillation is split into two sideband frequencies. The goal of this paper is to explain these effects using physics-based models, and to use these ideas to guide ...
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