Flutter Control Sim
☀️
Light
Platanitis & Strganac (2004) · 2-DOF Pitch-Plunge · NACA 0012
Airspeed 15.0 m/s
OL Flutter Speed 11.32 m/s
CL Flutter Speed —
Controller Open Loop
⚠ Flutter Risk
Sim Time 0.00 s
Airspeed
U / Uf = 1.325
15.0
metres per second
Uf
051015202530 m/s
⚠ Above open-loop flutter speed — controller required
Controller
Open Loop
Actuator Limits — FUTABA S9402
Deflection limit βmax±15°
Rate limit β̇max600°/s
TORQUE
0.654 N·m
MAX SPEED
0.10s/60°
FOS (1.5)
±10°
🔓
No controller active.
System responds to aerodynamics only.
⚠ Unstable at this airspeed. Oscillations will diverge.
Run Simulation
STOPPED
Wind Gust Injection
Constant crossflow velocity. Toggle on/off to apply.
Amplitude wg
2.0 m/s
⚡ Gust active — 2.0 m/s
Initial Conditions x₀ — IMPULSE
h = 0.01 m
α = 1°
ḣ = 0 m/s
α̇ = 0 rad/s
Speed
1×
Aeroelastic Section — Live Simulation
b = 0.1905 m · span = 0.5945 m · NACA 0012
Airfoil
Trailing edge flap (±15°)
Gust
Streamlines
State Vector x(t)
x = [ h, α, ḣ, α̇ ]
h — plunge
0.00000 m
α — pitch
0.000°
ḣ — plunge rate
0.000 m/s
α̇ — pitch rate
0.00°/s
β — flap deflection
0.000°
Sim time
0.00 s
Time History
Fixed y-axis · last 2.0 s
Pitch α0.000°
0
Plunge h0.0000 m
0
Flap β0.000°
0
Eigenvalue Map
Unstable
× Open loop● Closed loopRHP → unstable
LQR Steady-State Residuals
t=10s, w_g=2 m/s
CaseSS α (°)SS h (cm)
● A — —
● B — —
● C — —