?

Angle of attack ( )

?

Pitch angle ( )

? _d

Demanded pitch angle ( )

? _o

Optimum pitch angle ( )

?

Tip-speed-ratio

? _min

Minimum tip-speed-ratio

? _o

Optimum tip-speed-ratio

? _{Q ma x}

Tip-speed-ratio for maximum torque coefficient

? _g

Generator speed (r /s)

? _N

Rated rotational speed (r /s)

? _r

Rotor speed (r /s)

? _s

Synchronous speed (r /s)

? _z

Zero-torque speed (r /s)

?

Air density (1 .22 kg /m ³)

? _s

Torsion angle (r)

A

Area swept by the blades (m ²)

B _b

Blade damping (kg /s)

B _g

Intrinsic generator damping (kgm /s)

B _r

Intrinsic rotor damping (kgm /s)

B _s

Drive-train damping (kgm /s)

B _t

Tower damping (kg /s)

B _T

Intrinsic thrust damping (kNs /r)

C _P

Power coefficient

C _{P ma x}

Maximum power coefficient

C _Q

Torque coefficient

C _{Q ma x}

Maximum torque coefficient

C _T

Thrust coefficient

F _T

Thrust force (N)

J _g

Generator inertia (kgm ²)

J _r

Rotor inertia (kgm ²)

K _b

Blade stiffness (kg /s ²)

K _s

Drive-train stiffness (kg /s ²)

K _t

Tower stiffness (kg /s