Roll center analysis
Roll center analysis
Front suspension (Macpherson strut)
The Macpherson strut consists of lower arm, wheel hub, spring and shock absorber. The lower arm and the shock absorber will be connected with the body and the wheel hub. The roll center can be analyzed by using CATIA V20 for stimulating the dynamic motion of the designed vehicle.
Track width 1705 mm
The roll center of the front suspension will located at 55.63 cm above the ground
When the body roll at 5 degree and we assume that outer wheel will be upright. The inner wheel will be varied according to the roll angle as shown.
The roll center position when the car roll 5 degree are located at 33.2803 cm above the ground
For the roll center when the car roll 10 degree, we use the CATIA to stimulate the motion and get the roll center at 26.242 cm
Roll angle
Roll center (cm)
0
55.63
5
33.28
10
26.24
The roll center will decrease when the roll angle increase. This indicates that weight transfers less with higher roll angle decreasing roll center and has higher lateral force as the consequence. The advantage of this characteristic is great control while cornering and also promotes overtsteer behavior that is easy for the driver to handle.
Rear suspension (torsion beam)
Torsion beam can be analyzed the roll center by using rear and top view. For the static geometry we use CATIA to stimulate and find the roll center as follow.
From the analysis we get the roll center located at 11.71 cm
It can be seen that the roll center is just slightly changed while cornering.
Therefore, the front roll center height is 55.63 cm and the rear roll center height is 11.71 cm. we get more roll center height at front (assume the weight distribution is 50:50) that means the car will tend to
Front suspension (Macpherson strut)
The Macpherson strut consists of lower arm, wheel hub, spring and shock absorber. The lower arm and the shock absorber will be connected with the body and the wheel hub. The roll center can be analyzed by using CATIA V20 for stimulating the dynamic motion of the designed vehicle.
Track width 1705 mm
The roll center of the front suspension will located at 55.63 cm above the ground
When the body roll at 5 degree and we assume that outer wheel will be upright. The inner wheel will be varied according to the roll angle as shown.
The roll center position when the car roll 5 degree are located at 33.2803 cm above the ground
For the roll center when the car roll 10 degree, we use the CATIA to stimulate the motion and get the roll center at 26.242 cm
Roll angle
Roll center (cm)
0
55.63
5
33.28
10
26.24
The roll center will decrease when the roll angle increase. This indicates that weight transfers less with higher roll angle decreasing roll center and has higher lateral force as the consequence. The advantage of this characteristic is great control while cornering and also promotes overtsteer behavior that is easy for the driver to handle.
Rear suspension (torsion beam)
Torsion beam can be analyzed the roll center by using rear and top view. For the static geometry we use CATIA to stimulate and find the roll center as follow.
From the analysis we get the roll center located at 11.71 cm
It can be seen that the roll center is just slightly changed while cornering.
Therefore, the front roll center height is 55.63 cm and the rear roll center height is 11.71 cm. we get more roll center height at front (assume the weight distribution is 50:50) that means the car will tend to