Table 4 Characteristic parameters of blades.

From: Condition-based opportunistic maintenance strategy for multi-component wind turbines by using stochastic differential equations

Number

Operation time (h)

Waving amplitude (mm)

Swing amplitude (mm)

1

90

0.001

0.002

2

150

0.001

0.002

3

233

0.002

0.003

4

350

0.003

0.005

5

460

0.005

0.006

6

521

0.006

0.008

7

654

0.008

0.011

8

740

0.010

0.015

9

833

0.012

0.017

10

986

0.015

0.02