http://raphael.mit.edu/avl/
Extended Vortex-Lattice Model
* Aerodynamic Components
o Lifting surfaces
o Slender bodies
* Configuration definition
o Keyword-driven geometry input file
o Defined sections with linear interpolation
o Section properties
+ camberline is NACA xxxx, or from airfoil file
+ control deflections
+ parabolic profile drag polar, Re-scaling
o Scaling, translation, rotation of entire surface or body
o Duplication of entire surface or body
* Singularities
o Horseshoe vortices (surfaces)
o Source+doublet lines (bodies)
o Finite-core option
* Discretization
o Uniform
o Sine
o Cosine
o Blend
* Control deflections
o Via normal-vector tilting
o Leading edge or trailing edge flaps
o Flaps independent of discretization
* General freestream description
o alpha,beta flow angles
o p,q,r aircraft rotation components
o Subsonic Prandtl-Glauert compressibility treatment
* Aerodynamic outputs
o Aerodynamic forces and moments, in body or stability axes
o Trefftz-plane induced drag analysis
o Force and moment derivatives w.r.t. angles, rotations, controls
Trim Calculation
* Operating variables
o alpha,beta
o p,q,r
o control deflections
* Constraints
o direct constraints on variables
o indirect constraints via specified CL, moments
* Multiple trim run cases can be defined, saved, recalled
Mass Properties
* Optional mass definition file (for trim setup, eigenmode analysis)
o User-chosen units
o Itemized component location, mass, inertias
* Trim setup of constraints
o level or banked horizontal flight
o steady pitch rate (looping) flight
Eigenmode analysis
* Predicts flight stability characteristics
* Rigid-body, quasi-steady aero model
* Eigenvalue root progression with a parameter
* Display of eigenmode motion in real time
* Output of dynamic system matrices
Release Conditions
AVL is released under the GNU General Public License.
By downloading the software you agree to abide by the GPL conditions.
The most important conditions are:
* Any port of this AVL software to another platform must be made public under the GNU GPL
* Any port of this AVL software to another platform must be provided with the source code
* Any port of this AVL software must retain the "AVL x.xx" name and the original copyright
Extended Vortex-Lattice Model
* Aerodynamic Components
o Lifting surfaces
o Slender bodies
* Configuration definition
o Keyword-driven geometry input file
o Defined sections with linear interpolation
o Section properties
+ camberline is NACA xxxx, or from airfoil file
+ control deflections
+ parabolic profile drag polar, Re-scaling
o Scaling, translation, rotation of entire surface or body
o Duplication of entire surface or body
* Singularities
o Horseshoe vortices (surfaces)
o Source+doublet lines (bodies)
o Finite-core option
* Discretization
o Uniform
o Sine
o Cosine
o Blend
* Control deflections
o Via normal-vector tilting
o Leading edge or trailing edge flaps
o Flaps independent of discretization
* General freestream description
o alpha,beta flow angles
o p,q,r aircraft rotation components
o Subsonic Prandtl-Glauert compressibility treatment
* Aerodynamic outputs
o Aerodynamic forces and moments, in body or stability axes
o Trefftz-plane induced drag analysis
o Force and moment derivatives w.r.t. angles, rotations, controls
Trim Calculation
* Operating variables
o alpha,beta
o p,q,r
o control deflections
* Constraints
o direct constraints on variables
o indirect constraints via specified CL, moments
* Multiple trim run cases can be defined, saved, recalled
Mass Properties
* Optional mass definition file (for trim setup, eigenmode analysis)
o User-chosen units
o Itemized component location, mass, inertias
* Trim setup of constraints
o level or banked horizontal flight
o steady pitch rate (looping) flight
Eigenmode analysis
* Predicts flight stability characteristics
* Rigid-body, quasi-steady aero model
* Eigenvalue root progression with a parameter
* Display of eigenmode motion in real time
* Output of dynamic system matrices
Release Conditions
AVL is released under the GNU General Public License.
By downloading the software you agree to abide by the GPL conditions.
The most important conditions are:
* Any port of this AVL software to another platform must be made public under the GNU GPL
* Any port of this AVL software to another platform must be provided with the source code
* Any port of this AVL software must retain the "AVL x.xx" name and the original copyright