• New neural network approach for the prediction of aerodynamics coefficient aerofoils and wings. Comparison accuracy proposed method with that other networks proper orthogonal decomposition. Examples flow geometric parameters show superiority in both 2D 3D. Thorough analysis influence CFD data on predictions. This work proposes a novel multi-output aerodynamic coefficients two dimensions wings...

Several approaches for modelling the longitudinal aerodynamic coefficients of a fighter aircraft at high angles of attack, including the unsteady effects are presented. A traditional approach where the model of the coefficient arises in the form of the steady and unsteady effects, the unsteady effect being modelled by means of transfer functions. The second approach uses an internal variable de...

A 'differential measure' is used to cast our calculus for the group SU (3) into a form similar to Schwinger's boson operator calculus for the group SU (2). It is then applied to compute (i) the inner product between the basis states and (ii) an algebraic formula for the Clebsch-Gordan coefficients. These were obtained earlier by us using Gaussian integration techniques.

The validity of using a low-computational-cost model for the aerodynamic characterization Airborne Wind Energy Systems was studied by benchmarking three-dimensional Unsteady Panel Method (UnPaM) with experimental data from flight test campaign two-line Rigid-Framed Delta kite. latter, and subsequent analysis data, provided evolution tether tensions, full kinematic state kite (aerodynamic veloci...

In this paper we apply a recently introduced time domain parameter identification method to the estimation of the aerodynamic coefficients in aircraft systems. The method consists in improving the Local Weighted Regression (LWR) technique by adding a data Retention-and-Deletion (RD) strategy. The improvement comes with reduced computational effort since the two techniques can share their main c...

This paper investigates the problem of active flutter suppression for a two-dimensional three degrees of freedom (3DOF) airfoil. With the influence of unsteady aerodynamic forces and parametric uncertainties, the output suboptimal control law design for a 3DOF airfoil control system is transformed into a constrained optimization problem. Then, the flutter robust suppression control law could be...

The zero distribution of orthogonal polynomials pn,N , n = 0, 1, . . . generated by recurrence coefficients an,N and bn,N depending on a parameter N has been recently considered by Kuijlaars and Van Assche under the assumption that an,N and bn,N behave like a(n/N) and b(n/N), respectively, where a(·) and b(·) are continuous functions. Here, we extend this result by allowing a(·) and b(·) to be ...

The purpose of this paper is to find out a set of general recurrence formulas for the calculus of the SU(3) Clebsch-Gordan coefficients. The first six sections are introductory, presenting the notations and general group theoretical methods applied to SU(3). The following eight sections are devoted to a detailed treatment of the carrier spaces of the irreducible representations and their direct...

This paper describes an application of Adaptive Range Multiobjective Genetic Algorithms (ARMOGAs) to aerodynamic wing optimization. The objectives are to minimize transonic and supersonic drag coefficients, as well as the bending and twisting moments of the wings for the supersonic airplane. A total of 72 design variables are categorized to describe the wing’s planform, thickness distribution, ...