Efficient Time Domain Aeroelastic Analysis Using System Identification
نویسندگان
چکیده
منابع مشابه
Aeroelastic Computations in the Time Domain Using Unstructured Meshes
A strategy for computing aeroelastic solutions is proposed. An implicit LU fac-torisation scheme for solving the time dependent Euler equations on unstructured triangular meshes is presented and coupled with a typical section aeroelastic wing model. EEciency is improved by coupling the LU factorisation scheme with a GM-RES algorithm. In this case the LU scheme plays the role of a preconditioner...
متن کاملAccelerating Cfd-based Aeroelastic Predictions Using System Identification
System identification is evaluated as an efficient and accurate technique for modeling unsteady aerodynamic forces for use in time-domain aeroelastic analysis. In the system identification methodology, the constant coefficients of a linear system model are fit to the computed response time histories from a 3-D, unsteady CFD solver. The resulting model of the unsteady CFD solution is independent...
متن کاملFrequency- and Time-domain Aeroelastic Analysis of Cable- Supported Bridges using Approximated Aerodynamic Transfer Functions
ABSTRACT: An approximate approach for the frequencyand time-domain aeroelastic analysis of bridge decks is presented. The aerodynamic transfer functions are approximated as a linear function with the coefficients determined through minimization of the weighted error between the exact and approximated transfer function. The weighting function in optimization is introduced for the improved approx...
متن کاملDAMAGE IDENTIFICATION IN STRUCTURES USING TIME DOMAIN RESPONSES BASED ON DIFFERENTIAL EVOLUTION ALGORITHM
An effective method utilizing the differential evolution algorithm (DEA) as an optimisation solver is suggested here to detect the location and extent of single and multiple damages in structural systems using time domain response method. Changes in acceleration response of structure are considered as a criterion for damage occurrence. The acceleration of structures is obtained using Newmark me...
متن کاملEvolutionary System Identification in the Time-Domain
This paper develops a genetic algorithm based multivariable system identification technique from plant step response data directly. Using this technique, globally optimised models for linear and nonlinear systems can be identified without the need of a differentiable cost function or linearly separable parameters. Results are validated against a benchmark identification problem and a laboratory...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: International Journal of Aeronautical and Space Sciences
سال: 2005
ISSN: 2093-274X
DOI: 10.5139/ijass.2005.6.1.052