Flight Dynamic Simulation with Nonlinear Aeroelastic Interaction using the ROM-ROM Procedure

Award Information
Agency:
National Aeronautics and Space Administration
Branch
n/a
Amount:
$99,963.00
Award Year:
2010
Program:
SBIR
Phase:
Phase I
Contract:
NNX10CC07P
Agency Tracking Number:
094184
Solicitation Year:
2009
Solicitation Topic Code:
A2.07
Solicitation Number:
n/a
Small Business Information
ZONA Technology, Inc.
9489 E. Ironwood Square Drive, Scottsdale, AZ, 85258-4578
Hubzone Owned:
N
Socially and Economically Disadvantaged:
N
Woman Owned:
N
Duns:
182103291
Principal Investigator:
Ping Chih Chen
Principal Investigator
(480) 945-9988
pc@zonatech.com
Business Contact:
Jennifer Scherr
Business Official
(480) 945-9988
jennifer@zonatech.com
Research Institution:
n/a
Abstract
ZONA Technology, Inc. (ZONA) proposes to develop an integrated flight dynamics simulation capability with nonlinear aeroelastic interactions by combining a flight dynamics model and an added-on nonlinear aeroelastic solver in a Simulink environment. This nonlinear aeroelastic solver is generated by interacting a nonlinear structural reduced order model (ROM) with a Neural-Network-based (NN-based) aerodynamic ROM, called the ROM-ROM procedure, to provide the incremental aeroelastic forces and moments to a given flight dynamics model. In this way, the flight dynamics model is kept with minimum changes so that this integrated flight dynamics simulation remains in the frame work of a 6 degrees-of-freedom simulation environment. The nonlinear structural ROM employs a so-called ELSTEP/FAT procedure that operates on a nonlinear finite element method, such as MSC.Nastrans solution 106 to construct a set of modal-based nonlinear stiffness matrices. The NN-based aerodynamic ROM is generated using a system identification technique operating on a CFD code to evaluate the weights and biases in a two-layer feed-forward neural network system. The end product is called NL-DFS which can simulate the key aeroelastic coupling mechanism between nonlinear structural dynamics and nonlinear unsteady aerodynamics with classical rigid body dynamics of a slender, flexible and sizable aircraft in nonlinear aerodynamic flight conditions.

* information listed above is at the time of submission.

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