OPEN PHYSICS • TRACEABLE MODELS • REAL-TIME DESTINATION

Build the truth model.
Then make it run in real time.

OpenDynamics turns geometry, simulation, test data, and system identification into versioned vehicle models. The first operational capability is the Virtual Wind Tunnel.

MODEL DEVELOPMENT CHAIN ARCHITECTURE LOCKED

01GEOMETRY + MASS PROPERTIES

02UNSTEADY CFD / PHYSICAL TEST

03DYNAMIC AERO DATASET

04SYSTEM ID + NONLINEAR ROM

05VVF NONLINEAR 6DOF

CAPABILITY SELECTOR

OpenDynamics modules

One working capability now. The rest are explicit architectural destinations—not mystery meat.

α̇ / β̇

FOUNDATIONAL MODELING PRINCIPLE

Aerodynamic state includes rates and history—not only instantaneous attitude.

F, M = f(X, Ẋ, U, U̇, E, H)

OPEN DYNAMICS / ACTIVE MODULE

Virtual Wind Tunnel

Prototype external-flow laboratory and aerodynamic-data generator for the future VVF nonlinear 6DOF.

CASELOADING

SOLVERDEMO

OPENFOAMCHECKING

VVF PIPELINEPRESERVED

RUNIDLE

CASE CONTROL01

Saved case Case name

Solver Geometry

25 MiB max

TUNNEL02

Velocity m/s Density kg/m³ Temp K

Area m² Span m Chord m

MACH—

REYNOLDS—

Q̄—

DYNAMIC AERODYNAMIC STATE03

α̇ and β̇ are authoritative inputs Rates and history survive every handoff into the VVF dataset.

α deg β deg α̇ deg/s β̇ deg/s

p deg/s q deg/s r deg/s

MANEUVER + NUMERICS04

Maneuver Turbulence

Duration s Time step s Frequency Hz

α amplitude deg β amplitude deg Mesh

VIRTUAL TEST SECTION

DYNAMIC RAMPBODY AXES

+X FORWARD+Y RIGHT+Z DOWN (VVF)

α0.0° α̇0.0°/s

β0.0° β̇0.0°/s

EXPERIMENT READINESSREADY

SOLVER HANDOFF05

Generate the real CFD case now, or run the built-in transient demonstrator to exercise the full data path.

OpenFOAM v0.1 is a steady snapshot; dynamic rates remain in the manifest.

LATEST COMPLETED EXPERIMENT

No run selected

Run an experiment to populate aerodynamic state and loads.

C_L—lift coefficient

C_D—drag coefficient

C_m—pitch moment

LIFT—newtons

DRAG—newtons

SEPARATION—history state

AERODYNAMIC COEFFICIENTSC_L / C_D / C_m

DYNAMIC STATEα / α̇ / HISTORY

FINAL BODY-AXIS LOADSVVF CONVENTION

F_x—

F_y—

F_z—

M_x—

M_y—

M_z—

FINAL NORMALIZED RATESNON-DIMENSIONAL

p̂—

q̂—

r̂—

α̇*—

β̇*—

EXPERIMENT LEDGER

Runs

Run	Case	Solver	Status	Created	Action
No runs yet.

DESIGNED BACKWARD FROM THE RUNTIME

Virtual Vehicle Framework development pipeline

The wind tunnel is not the destination. It produces traceable force-and-moment truth for nonlinear model identification and the future real-time six-degree-of-freedom solver.

AERODYNAMIC MODEL CONTRACT F, M = f(α, β, α̇, β̇, p, q, r, U, U̇, E, H)

01GEOMETRYCAD / STL / OBJ
reference dimensions

→

02EXPERIMENTSsteady + unsteady CFD
physical and flight test

→

03TRUTH DATAstates, rates, history
forces and moments

→

04MODEL FACTORYsystem identification
nonlinear ROM / surrogate

→

05VVF 6DOFreal-time nonlinear solver
VR / HIL / prediction

INDEPENDENT VARIABLESINPUT

u v w
p q r
α β
α̇ β̇
Mach Reynolds
control position/rate
environment + history

DEPENDENT VARIABLESOUTPUT

Fx Fy Fz
Mx My Mz
CL CD CY
Cl Cm Cn
surface pressure
separation / wake states

PROVENANCEREQUIRED

geometry version
solver + configuration
mesh + convergence
coordinate conventions
calibration lineage
validation status

Build the truth model.Then make it run in real time.