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Table 5 Optimization results—objective function and constraints

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

Parameter

Fuzzy logic control-GA

PID-GA

PID classical

Passive system

RMS control force (N)

140.9662

445.4385

346.8979

VDV (m/s1.75)

1.1782

1.4410

1.6174

2.1509

Aw (m/s2)

0.5057

0.6178

0.6890

0.9322

RMS suspension space deflection (m)

0.0085

0.01007

0.008700

0.009311

RMS tyre deflection (m)

0.0042

0.008864

0.007300

0.004473

Max control force (N)

345.6605

1423.1810

1173.24400

Max acceleration (m/s2)

2.31900

1.8615

2.1800

3.16720

Max suspension space deflection (m)

0.02520

0.03426

0.03050

0.02640

Max tyre deflection (m)

0.01350

0.02639

0.02510

0.01840