Skip to main content

Table 2 Membership functions

From: GA-based multi-objective optimization of active nonlinear quarter car suspension system—PID and fuzzy logic control

MF

Input 1 (e)

Input 2 (ec)

Output (f)

NL

[− 1– 1 − 0.7 − 0.4]

[− 1 − 1 − 0.6 − 0.3]

[− 1 − 1 − 0.9 − 0.6]

NM

[− 0.7− 0.5 − 0.3 − 0.05]

[− 0.6 − 0.4 − 0.3 − 0.1]

[− 0.9 − 0.7 − 0.5 − 0.2]

NS

[− 0.4 − 0.2 − 0.1 0]

[− 0.3 − 0.2 − 0.1 0]

[− 0.6 − 0.3 − 0.2 0]

ZE

[− 0.05 − 0.01  0.01 0.05]

[− 0.1 − 0.025 0.025 0.1]

[− 0.2 − 0.05 0.05 0.2]

PS

[0 0.1 0.2 0.4]

[0 0.1 0.2 0.3]

[0 0.2 0.3 0.6]

PM

[0.05 0.3 0.5 0.7]

[0.1 0.3 0.4 0.6]

[0.2 0.5 0.7 0.9]

PL

[0.4 0.7 1 1]

[0.3 0.6 1 1]

[0.6 0.9 1 1]