I. Cotoi, A.D. Dinu, and R.M. Botez (Canada)
Aeroelasticity, Control laws, aeroservoelasticity, Chebyshev polynomials, unsteady aerodynamic forces, interpolation methods.
The approximation of unsteady generalized aerodynamic forces from frequency into Laplace domain acting on a Fly-By-Wire aircraft presents an important challenge in the aeroservoelasticity area. The aerodynamic forces in the reduced frequency domain have to be approximated in the Laplace domain, in order to study the effects of the control laws on the flexible aircraft structure. In this paper we present a new method of approximation of the generalized aerodynamic forces by use of Chebyshev polynomials and their orthogonality properties. A comparison of this new method with other methods used to calculate an approximation of the generalized aerodynamic forces from frequency into Laplace domain is presented. The comparison shows that this new method gives excellent results with respect to the other three methods and is applied on the Aircraft Test Model at NASA DFRC.
Important Links:
Go Back
