Model Updating Nonlinear System Identification Toolbox

Award Information
Agency:
National Aeronautics and Space Administration
Branch
n/a
Amount:
$69,787.00
Award Year:
2005
Program:
SBIR
Phase:
Phase I
Contract:
NND05AA44C
Agency Tracking Number:
041184
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
Zona Technology, Inc.
7430 E. Stetson Drive, Suite 205, Scottsdale, AZ, 85251
Hubzone Owned:
N
Socially and Economically Disadvantaged:
N
Woman Owned:
N
Duns:
182103291
Principal Investigator:
Dario Baldelli
(480) 945-9988
dario@zonatech.com
Business Contact:
Jennifer Scherr
Business Official
(480) 945-9988
jennifer@zonatech.com
Research Institution:
n/a
Abstract
ZONA Technology proposes to develop an enhanced model updating nonlinear system identification (MUNSID) methodology by adopting the flight data with state-of-the-art control oriented techniques. The end product is a flight data enhanced MUNSID/ZAERO toolbox for accurate predictions of flutter and limit cycle oscillation (LCO) instabilities. The enhancement employs control oriented techniques, namely, model uncertainty, linear fractional transformation framework, mu-analysis and nonlinear operators identification, to adopt the emerging aeroelastic flight-test data. This toolbox augments the current match-point solution approach using the mu-analysis method with identified nonlinear operators. The procedure calls for ZAERO's high-fidelity linear aeroelastic model to be tuned quickly with available aeroelastic/aeroservoelastic, AE/ASE, flight data sets, while block-oriented models are used to highlight the underlying nonlinear structure of the AE/ASE system. This framework is capable of accounting for several nonlinearities including those due to aerodynamics, structures, control/actuator, and/or geometry. The toolbox will be used as the next-generation flutterometer to predict the onset of AE/ASE instabilities. Two case studies, simple and complex dynamic ASE systems, are proposed to validate and verified this advanced control-oriented concept. This enabling technology will be invaluable to the flight test community by extending the current industry modeling tools to include

* information listed above is at the time of submission.

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