Computes steering wheel rotation, pitman arm rotation or rack translation, and (for steering gear w/ pitman only) rotation difference between steering wheel and pitman arm. Information about the actual steering wheel joint rotation, joint 735, is also presented as is the angle in the SIM/STAT joint.
Input:
REQ/id, FUNCTION = USER (1103,type,swm,swrm,prm,prrm,ratio,swrm2 )
where:
| | Description |
|---|
type | = | Steering type
0 =Steering gear with pitman arm
1 = Rack and pinion steering |
swm | = | Steering wheel MARKER id |
swrm | = | Steering wheel reference MARKER id |
prm | = | Pitman or rack MARKER id |
prrm | = | Pitman or rack reference MARKER id |
ratio | = | Steering gear ratio |
swrm2 | = | secondary steering wheel reference marker |
Request File Output
Column Number Output:
1. Steering wheel rotation (deg)
2. Pitman arm rotation (deg) or rack translation (mm)
3. Difference between the pitman arm (deg) rotation and the steering gear rotation (for steering gear w/ pitman arm systems)
4. Steering wheel angle at Adams joint (deg) (this is the input Adams puts in at MOTION/735)
5. Steering system angular compliance (deg) between steering wheel and pitman arm (for steering gear w/ pitman arm systems)
6. Angle at column SIM/STAT joint (deg) (this is the joint that Adams uses in the new CONSUB SIM/STAT routine for zero drift starts)
Notes on Input and Output
The steering type indicates either steering gear with pitman arm or rack-and-pinion steering. For the steering gear with pitman arm system, the steering wheel MARKER is on the steering wheel with its QP at the steering-wheel-to-body joint and with its ZP at the pitman axis point. For rack-and-pinion steering, the steering wheel MARKER is on the steering wheel with its QP at the pinion-to-body joint and with its ZP at the pinion axis point.
The steering wheel reference MARKER has the same location and orientation as the steering wheel MARKER, but the steering wheel reference MARKER is on the body rather than on the steering wheel. The secondary steering wheel reference MARKER has the same location and orientation as the steering wheel reference MARKER but is mounted on the intermediate shaft.
If the vehicle has a steering gear with pitman arm system, a pitman MARKER is on the pitman at the body-to-pitman joint with its ZP at the pitman axis point. The pitman reference MARKER has the same location and orientation as the pitman MARKER, but the pitman reference MARKER is on the body rather than on the pitman.
If the vehicle has rack-and-pinion steering, a rack MARKER is on the rack at the body-to-rack joint with its Z axis pointing in the global negative Y direction. The rack reference MARKER has the same location and orientation as the rack MARKER, but the rack reference MARKER is on the body rather than on the rack.
The steering system angular compliance between the steering wheel and the pitman arm is computed by subtracting the normalized pitman arm angle from the steering wheel angle. The normalized pitman arm angle is calculated by multiplying the actual pitman arm angle by the steering gear ratio:
Compliance = Steering wheel angle - Pitman Arm Angle * Gear RatioReturn to Index