View source for Model-Based Control of Cavity Oscillations, Part II: System Identificaion and Analysis

{{HTDB paper
| authors = Clancy W. Rowley, David R. Williams, Tim Colonius, Richard M. Murray, Douglas G. MacMartin, Drazen Fabris
| title = Model-Based Control of Cavity Oscillations, Part II: System Identificaion and Analysis
| source = 2002 AIAA Aerospace Sciences Meeting
| year = 2001
| type = Conference Paper
| funding = AFOSR/MURI
| url = http://www.cds.caltech.edu/~murray/preprints/row+02-aiaa.pdf
| abstract = 
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 control design.
We present a linear model for the cavity flow,
based on the physical mechanisms of the familiar
Rossiter model. Experimental data indicates
that under many operating conditions, the oscillations
are not self-sustained, but in fact are caused
by amplification of external disturbances. We
present some experimental results demonstrating
the peak-splitting phenomena mentioned above, use
the physics-based model to study the phenomena,
and discuss fundamental performance limitations
which limit the achievable performance of any control
scheme.

| flags = 
| filetype = PDF, 22 pages
| filesize = 2146K
| tag = row+02-aiaa
| id = 2001o
}}