Environmental Engineering Reference
In-Depth Information
Fig. 6.11 Generated power
5.25
Constrained controller
Baseline controller
5.24
5.23
5.22
5.21
5.2
5.19
5.18
5.17
5.16
5.15
350
400
450
500
550
[Time]
Fig. 6.12 Rotor thrust force
Constrained controller
Baseline controller
800
600
400
200
0
−200
−400
350
400
450
500
550
[Time]
Table 6.4 Critical natural
frequencies
Platform surge
0.015 Hz
Platform pitch
0.049
Platform heave
0.1
Blade pitch
0.03
aerodynamic damping. This issue was discussed in the introduction of this chapter.
As the plots show, and Table
6.4
imply, enough aerodynamic damping is acting on
the tower. Hence, the overall system remains stable.
