The SUGAR Truss-Braced Wing (TBW) aircraft concept is a Boeing-developed N+3 aircraft configuration funded by NASA ARMD Fixed Wing Project. This future generation transport aircraft concept is designed to be aerodynamically efficient by employing a high aspect ratio wing design. The aspect ratio of the TBW is on the order of 14 which is significantly greater than those of current generation tra...

A method of scaling is described that easily converts the aeroelastic equations of motion of a full-sized aircraft into ones of a wind-tunnel model. To implement the method, a set of rules is provided for the conversion process involving matrix operations with scale factors. In addition, a technique for analytically incorporating a spring mounting system into the aeroelastic equations is also p...

Calibration errors are the dominant error source for direction nding (DF) from airborne platforms. Calibration of the array manifold is done with the wings in an unknown position. Wing movements during ight perturbs the array manifold from its calibrated value, causing errors in the direction nding. We present a direction nding algorithm that compensates for variations in wing exure. The algori...

During its near-ground hovering phase a Short Take-Off and Vertical Landing (STOVL) aircraft creates a complex three-dimensional flow field between jet streams, the airframe surface and the ground. A proper understanding and numerical prediction of this flow is important in the design of such aircraft. In this paper an experimental facility, used to gather validation data suitable for testing C...

This paper presents an integrated approach to the modeling and control of aircraft with flexible wings. The coupled aircraft rigid body dynamics with a high-order elastic wing model can be represented in a finite dimensional state-space form. Given a set of desired output covariance, a model reduction process is performed by using the weighted Modal Cost Analysis (MCA). A dynamic output feedbac...

The application of two evolutionary optimisation schemes to the problem of flight clearance of nonlinear control laws for highly augmented aircraft is described. Hybrid versions of both schemes incorporating local gradient-based optimisation are also developed and evaluated. Comparisons of computational complexity and global convergence are conducted by checking for violations of a nonlinear cl...

This paper presents an end-to-end approach for the assessment of pressurized and cryogenic wind tunnel measurements EMBRAER scaled full model close to real-world Reynolds numbers. The choice microphones, measurement parameters, design array, selection flow parameters are discussed. Different conditions proposed which allow separating influence number from Mach number, as well slotted closed tes...

This paper presented methods to determine the aerodynamic forces that acton an aircraft wing during flight. These methods are initially proposed for asimplified two degree-of-freedoms airfoil model and then are extensivelyapplied for a multi-degree-of-freedom airfoil system. Different airspeedconditions are considered in establishing such methods. The accuracy of thepresented methods is verifie...