Commercial Vehicle Ride Comfort Optimization Based on Intelligent Algorithms and Nonlinear Damping

Table 1

Fixed parameters of the vibration model.

Symbol	Description	Value	Unit
mp	Driver and seat mass	100	kg
mc	Cab mass	850	kg
mb	Sprung mass	14238	kg
mfu	Unsprung mass of front axle	607	kg
mru	Unsprung mass of rear axle	1054	kg
Jc	Rotational inertia of cab mass around y-axis	560	kg·m^2
Jb	Rotational inertia of sprung mass around y-axis	115000	kg·m^2
J	Rotational inertia of rear axle balance suspension mass around y-axis	615	kg·m^2
kp	Seat stiffness	20000	N/m
kfc	Front suspended stiffness	25000	N/m
krc	Rear suspended stiffness	25000	N/m
kfs	Front suspension stiffness	410000	N/m
krs	Rear suspension stiffness	1476000	N/m
kft	Front wheel stiffness	1800000	N/m
krt	Rear wheel stiffness	3600000	N/m
cp	Equivalent damping coefficient of driver seat	800	N·s/m
cfs	Equivalent damping coefficient of front suspended	5000	N·s/m
crs	Equivalent damping coefficient of rear suspended	5000	N·s/m
cft	Equivalent damping coefficient of front suspension	12000	N·s/m
crt	Equivalent damping coefficient of rear suspension	15000	N·s/m
l1	Distance between the center and seat of the cab	0.2	m
l2	Distance between front suspended and the center of the cab	0.76	m
l3	Distance between rear suspended and the center of the cab	0.87	m
l4	Distance between the center of the cab and the center of target commercial vehicle	2.47	m
l5	Distance between the front suspension and the center of target commercial vehicle	2.1	m
l6	Distance between the rear suspension and the center of target commercial vehicle	3	m