Model Updating Nonlinear System Identification Toolbox

Award Information
Agency: National Aeronautics and Space Administration
Branch: N/A
Contract: NND05AA44C
Agency Tracking Number: 041184
Amount: $69,787.00
Phase: Phase I
Program: SBIR
Awards Year: 2005
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
7430 E. Stetson Drive, Suite 205, Scottsdale, AZ, 85251
DUNS: 182103291
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Dario Baldelli
 (480) 945-9988
 dario@zonatech.com
Business Contact
 Jennifer Scherr
Title: Business Official
Phone: (480) 945-9988
Email: 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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