The control and stability derivatives of Yardstik to be used for simulation are generated using the Tornado software. Tornado is a 3-D vortex lattice program written in Matlab environment which makes use of the vortex lattice method for obtaining the forces and moment acting on the aerodynamic surfaces [2]. From these forces and moment generated, we are able to obtain the stability and control ...

An experimental methodology is proposed for the study of aeroelastic systems. The approach locally evaluates forces involved in Collar’s triangle, namely aerodynamic, elastic, and inertial forces. position flow tracers as well markers on object surface monitored by a volumetric PIV system. From recorded images, surfare are separated based their optical characteristics. resulting images then ana...

The derivation of a control-design model (CDM) of the 6-DOF rigid body dynamics of a hypersonic vehicle is presented in this paper. The development of the CDM is based on curve t approximation of the forces and moments on the vehicle, making the model suitable for control design. In order to have an implementable curve t algorithm, the forces and moments have been divided into their components ...

This paper presents the design and validation of a measurement system for aerodynamic characteristics of unmanned aerial vehicles. An aerodynamic balance was designed in order to measure the lift, drag forces and pitching moment for different airfoils. During the design process, several aspects were analyzed in order to produce an efficient design, for instance the range of changes of the angle...

A new parameterisation for the threshold shear velocity to initiate deflation of dry and wet particles is presented. It is based on the balance of moments acting on particles at the instant of particle motion. The model hence includes a term for the aerodynamic forces, including the drag force, the lift force and the aerodynamic moment force, and a term for the interparticle forces. The effect ...

An experimental study was conducted to investigate the aerodynamic characteristics of a bio-inspired corrugated airfoil compared with a streamlined airfoil and a flat plate at the chord Reynolds number of Re= 58,000 ~ 125,000 to explore the potential applications of such bio-inspired corrugated airfoils for micro air vehicle (MAV) designs. In addition to measuring the aerodynamic lift and drag ...

ScMf.r^ A review of lighter aircraft development programs over the pas t.three decades Indicates a trend of increasing emphasis on the considera tion of static aeroe las tic effects. While early concerns addressed only the impact on air vehicle structural integrity, current design philosophy recognizes and addresses aen jelastlclty as a primary design parameter affecting structural optimiza tio...

A method to efficiently generate a complete aerodynamic description for projectile flight dynamic modeling is described. At the core of the method is an unsteady, time accurate computational fluid dynamics simulation that is tightly coupled to a rigid body dynamics simulation. A set of n short time snippets of simulated projectile motion at m different Mach numbers is computed and employed as b...