MotionView User's Guide

Roll Steer, Caster, and Camber

Roll Steer, Caster, and Camber

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Roll Steer, Caster, and Camber

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Branch ID: 190

Request Number: 50000190

Description: Roll Steer, Roll Caster, and Roll Camber

Component

Unit

Comment

1 (X):  Left Wheel Roll Steer

% (deg/100 deg)

The left wheel steer angle change due to out-of-phase vertical deflections of the left and right tire patch points expressed in degrees of axle roll or:

track = abs((right wheel center y) - (left wheel center y))

deltaz = C(3,3)-C(3,9)-C(9,3)+C(9,9)+2/(tire stiffness)

roll steer = (C(6,3) - C(6,9))*track/deltaz*100

2 (Y):  Left Roll Caster

% (deg/100 deg)

The left caster angle change due to out-of-phase vertical deflections of the left and right tire patch points expressed in degrees of axle roll or:

track = abs((right wheel center y) - (left wheel center y))

deltaz = C(3,3)-C(3,9)-C(9,3)+C(9,9)+2/(tire stiffness)

Orientation A:

roll caster = (C(5,3)-C(5,9))*track/deltaz*100

Orientation B:

roll caster = (-C(5,3)+C(5,9))*track/deltaz*100

3 (Z):  Left Wheel Roll Camber

% (deg/100 deg)

The left wheel camber angle change due to out-of-phase vertical deflections of the left and right tire patch points expressed in degrees of axle roll or:

track = abs((right wheel center y) - (left wheel center y))

deltaz = C(3,3)-C(3,9)-C(9,3)+C(9,9)+2/(tire stiffness)

Orientation A:

roll camber = -(-C(4,3)+C(4,9))*track/deltaz*100

Orientation B:

roll camber = (-C(4,3)+C(4,9))*track/deltaz*100

4 (RX):  Right Wheel Roll Steer

% (deg/100 deg)

The right wheel steer angle change due to out-of-phase vertical deflections of the left and right tire patch points expressed in degrees of axle roll or:

track = abs((right wheel center y) - (left wheel center y))

deltaz = C(3,3)-C(3,9)-C(9,3)+C(9,9)+2/(tire stiffness)

roll steer = (C(12,3) - C(12,9))*track/deltaz*100

5 (RY):  Right Roll Caster

% (deg/100 deg)

The right caster angle change due to out-of-phase vertical deflections of the left and right tire patch points expressed in degrees of axle roll or:

track = abs((right wheel center y) - (left wheel center y))

deltaz = C(3,3)-C(3,9)-C(9,3)+C(9,9)+2/(tire stiffness)

Orientation A:

roll caster = -(C(11,3)-C(11,9))*track/deltaz*100

Orientation B:

roll caster = (C(11,3)-C(11,9))*track/deltaz*100

6 (RZ):  Right Wheel Roll Camber

% (deg/100 deg)

The right wheel camber angle change due to out-of-phase vertical deflections of the left and right tire patch points expressed in degrees of axle roll or:

track = abs((right wheel center y) - (left wheel center y))

deltaz = C(3,3)-C(3,9)-C(9,3)+C(9,9)+2/(tire stiffness)

Orientation A:

roll camber = -(-C(10,3)+C(10,9))*track/deltaz*100

Orientation B:

roll camber = (-C(10,3)+C(10,9))*track/deltaz*100

See Also:

List of SDF Parameter Definitions