Research Article

Research on Road Roughness Based on NARX Neural Network

Table 1

Parameters.

ParameterSymbol

Body massm
Front wheel massm1 and m2
Rear wheel massm3 and m4
Displacement of the body mass in the vertical direction
Yaw moment of inertia around the x-axisIx
Yaw moment of inertia around the y-axisIy
Distance of center of gravity to front axlea
Distance of center of gravity to rear axleb
Displacement excitation of the road affecting the left front tire
Displacement excitation of the road affecting the right front tire
Displacement excitation of the road affecting the left rear tire
Displacement excitation of the road affecting the right rear tire
Synthesized stiffness of front tirek1 and k3
Synthesized stiffness of rear tirek5 and k7
Stiffness of front suspensionk2 and k4
Stiffness of rear suspensionk6 and k8
Track base of the vehicleL
Displacement of the left front wheels in the vertical direction
Displacement of the right front wheels in the vertical direction
Displacement of the left rear wheels in the vertical direction
Displacement of the right rear wheels in the vertical direction
Vertical displacement of body centroid
Roll angle displacement of the body
Pitch angle displacement of the body
Equivalent damping coefficient of front tirec1 and c3
Equivalent damping coefficient of rear tirec5 and c7
Equivalent damping coefficient of front suspensionc2 and c4
Equivalent damping coefficient of rear suspensionc6 and c8