Skip to main content

Table 1 System parameters

From: Fuzzy Sliding Mode Control for the Vehicle Height and Leveling Adjustment System of an Electronic Air Suspension

Parameter Value
Mass of the vehicle body m s (kg) 11560
Roll moment of inertia I θ (kg·m2) 16750
Pitch moment of inertia I φ (kg·m2) 85036
Unsprung mass of front wheel m fr , m fl (kg) 435
Unsprung mass of rear wheel m rl , m rr (kg) 845
Distance from the centre of gravity to front axis l f (m) 3.32
Distance from the centre of gravity to front axis l r (m) 2.38
Half of the wheel-track l a (m) 1.21
Front wheel damping coefficients cd1, cd2 (N·s·m−1) 11085
Rear wheel damping coefficients cd3, cd4 (N·s·m−1) 13900
Tyre stiffness k tf , k tr (kN/m) 650
Cross-sectional area of the air spring A asi (m2) 0.042
Cross-sectional area of the solenoid valve s (m2) 7 × 10‒6
Volume of the pipeline V pi (m3) 1.7 × 10‒4
Air pressure of the air reservoir P h (MPa) 1.8
Air pressure of the environment P e (Pa) 1.01 × 105
Air temperature T (K) 293.15
Universal gas constant R (J·kg‒1·K‒1) 287.1
Polytropic index k 1.4
Critical pressure ratio b 0.528