Identification and Analysis of Full Scale Ventilation Events

Table 2

Membership function definition.

Parameter	Membership function	Expression
Propeller number of revolution (rps)	Sigmoid right	𝜇𝑛=1/(1+𝑒^−1.4⋅(𝑛−(𝑛+𝜎𝑛)))
Torque coefficient 𝐾𝑄	Sigmoid left	𝜇𝐾𝑄=1/(1+𝑒^(0.8/𝜎𝐾𝑄)⋅(𝐾𝑄−(𝐾𝑄−2⋅𝜎𝐾𝑄)))
Submergence index	Sigmoid right	𝜇sub_idx=1/(1+𝑒^−30⋅(sub_idx−0.2))
Propeller pitch	Bell shaped	𝜇pitch=1/(1+|(𝑝−𝑝)/0.05|^3)
Azimuth	Sigmoid right or left	𝜇az=1/(1+𝑒^sign⋅1.8⋅(az−sign⋅10))