This routine computes the standard toe, caster, and camber angles of a suspension as well as tread change, roll center height and spring lever ratio.
Input:
REQ/id, FUNCTION = USER (1126,m5id,m6id,m7id,m8id,m9id,m10wid,ms10id,m11id,twid)
where:
| | Description |
|---|
m5id | = | id of MARKER at point 5 (upper spring mounting point) |
m6id | = | id of MARKER at point 6 (lower ball joint) |
m7id | = | id of MARKER at point 7 (upper ball joint) |
m8id | = | id of MARKER at point 8 (lower spring mounting point) |
m9id | = | id of MARKER at point 9 (wheel center) |
mw10id | = | id of MARKER at point 10 (tire contact patch) on wheel |
ms10id | = | id of MARKER at point 10 (tire contact patch) on spindle |
m11id | = | id of MARKER at point 11 (spindle alignment point) |
twid | = | suspension tread width at design (mm) |
Request File Output
Column Number Output:
1. Camber angle (deg)
2. Caster angle (deg)
3. Toe angle (deg)
4. Total tread change (mm)
5. Roll center height (mm)
6. Wheel-to-spring lever ratio
Notes on Input and Output
This request can only be accessed for half or quarter vehicle suspension models. Also, the analysis must be run using "kinematic analysis" since the routine uses velocity vectors to establish the location of the roll center. This REQUEST has the following sign convention:
Positive Toe: Toe in
Positive Camber: Top of tire out