0 20 40 60 80 100 -0.6
-0.5 -0.4 -0.3 -0.2 -0.1 0 0.1 0.2
output yaw from DLL Calculated yaw from dummy
0 20 40 60 80 100
-5 -4 -3 -2 -1 0 1 2 3 4
time
P itc h (d e g)
output pitch from DLL Calculated pitch from dummy
Blade2 seized, blade1 and 3 feathered
Regular wave Hs=13.3, Tp=14.4, V=41.7 m/s, 200s simulation
0 50 100 150 200 -8
-7 -6 -5 -4 -3 -2 -1 0 1 2
Time (s)
P itc h[ d eg ]
pitch angle comparison
Lb-Lt Lb-Mt Lb-Ub axisangle
0 50 100 150 200
-8 -7 -6 -5 -4 -3 -2 -1 0 1
Time (s)
ya w [d e g]
Yaw angle comparison
stick axiangle-r1
0 50 100 150 200 -0.5
0 0.5 1 1.5 2 2.5 3 3.5
Time (s)
R o ll[ d e g]
roll angle comparison
Lb-Lt Lb-Mt Lb-Ub
When the 5-m long stick becomes massless
0 100 200 300 400 500 600
-8 -6 -4 -2 0 2 4
Time (s)
P itc h[ d eg ]
pitch angle comparison
Lb-Lt Lb-Mt Lb-Ub axisangle r1
0 100 200 300 400 500 600 -10
-8 -6 -4 -2 0 2 4
Time (s)
ya w [d e g]
Yaw angle comparison
stick axiangle-r1
0 100 200 300 400 500 600
-0.5 0 0.5 1 1.5 2 2.5 3 3.5 4
Time (s)
R o ll[ d e g]
roll angle comparison
Lb-Lt Lb-Mt Lb-Ub
It seems that due to the unbalanced loads of the blade, the yaw and pitch motion doesn’t come back to
the neutral position.
0 100 200 300 400 500 -5
-4 -3 -2 -1 0 1 2
Time (s)
P itc h[ d eg ]
pitch angle comparison
Lb-Lt Lb-Mt Lb-Ub axisangle r1
0 100 200 300 400 500 600
-6 -4 -2 0 2 4 6
Time (s)
ya w [d e g]
Yaw angle comparison
stick axiangle-r1
Stick length=1m
0 100 200 300 400 500 600 -6
-4 -2 0 2 4 6
Time (s)
ya w [d e g]
Yaw angle comparison
stick axiangle-r1
0 100 200 300 400 500 600
-3 -2.5 -2 -1.5 -1 -0.5 0 0.5 1 1.5
Time (s)
R o ll[ d e g]
roll angle comparison
Lb-Lt Lb-Mt Lb-Ub
