Vehicle Ride and Handling Analysis
Introduction
This tool lets you experiment with the steer- and camber-by-roll coefficients of a 3-DOF vehicle model, and simulate the effect on the yaw gain curve and the understeer coefficient.
Enter the vehicle mass, inertial, geometric and compliance properties, then the natural-frequency requirements for the suspension
Click "Compute Parameters" to determine the stiffness and damping coefficients
Adjust Steer-by-Roll and Camber-by-Roll factors
Set up simulation properties and click "Run Simulation"
Mass and Inertia
Geometry
Vehicle curb weight
Total vehicle sprung mass weight
Unsprung weight per wheel, front
Unsprung weight per wheel, rear
Vehicle inertia about z axis
Sprung mass inertial about x axis
Wheel base
Track ( front and rear)
Distance of CG from front axle (a)
Distance of CG from rear axle (b)
Vehicle CG height
Sprung mass CG height
Roll center height ( front/rear)
Compliances
Requirements
Tire cornering stiffness (front and rear)
Tire vertical stiffness
Tire camber stiffness (front and rear)
Front shock absorber rate ( per wheel)
Rear shock absorber rate ( per wheel)
Distance between installation point of left and right springs
(front and rear):
Distance between installation point of left and right shock absorber (front and rear):
Installation factor for springs and shock absorbers for front and rear wheels
First natural frequency of front suspension
6.283
First natural frequency of rear suspension
7.540
Anti-roll-bar on front axle, Roll Gain
Calculated Parameters
Understeer/Oversteer
Front Suspension Stiffness,
Rear Suspension Stiffness,
Overall Torsional Stiffness,
Overall Torsional Damping,
Anti Roll-Bar Torsional Stiffness,
-0.091
-0.341
-1.000
0.830
Oversteer
-0.00082
Simulation Setup
Vehicle Speed
26 = 94
Steering Angle
5.13 deg
Simulation Duration
1.91 seconds
Results
