Danfoss pved-cl, Operation Manual, Page: 54 / 116

Min Sts = 20
0 100 200 300 400 500 600 700 800 900 1000
340
360
380
400
420
Vesm = 500
Vehicle speed
Ve = Vehicle speed: 1 unit = 0.1 km/h
Fixed sensitivity – program 0
Sts0 Sts1 Sts2 Sts3
Sts4 Sts5
Vehicle speed dependant
(non-linear) – program 2
Vehicle speed dependant
(non-linear) – program 3
Vehicle speed dependant
(linear) – program 1
Max Sts = 1200
Select a Fixed Steering Sensitivity
Sse selects between a fixed steering sensitivity, variable to steering actuator position or vehicle speed.
Set Sse to 1 to select the fixed sensitivity.
Sts0 set the steering ratio. This value should provide sufficient directional stability at all vehicle speeds.
The default value is set at a steering ratio most used.
Symbol Index Default Value range
Sse 1y09 1 Must be set at 1
Sts0 1y10 400 20 to1200
A steering ratio of 400 equals to 4.00 steering wheel turns to move the steering actuator from YL to YR (left to right end-lock position)
Select a Sensitivity with Relation to Vehicle Speed
Variable steering sensitivity related to vehicle speed is normally used to optimize steering controllability
at higher driving speeds. The values & correlation is normal closely related to the present vehicle
dynamics of the individual vehicle model.
The correlation is defined by seven parameters. All Sts-parameters may be set equal to each other or
monotonically rising for higher vehicle speeds. The steering sensitivity between two table coordinates is
found by linear interpolation. The relation is equal for negative speeds.
200 300 400 500
0
340
360
380
420
Sts0=400
Sts3=400 Sts4=400
Sts5=400
Ve = Vehicle speed: 1 unit = 0.1 km/h
Vesm=500
Sts
(Ve)
saturates
max Sts = 1200
700 800 900 600 1000
min Sts = 20
100
400
Sts1=400
example
St
eer
ing sensitivit
y S
ts
(V
e)
Sts2=400
P005 204E
Variable steering sensitivity related to actuator position, is normally applied to have a higher sensitivity
around neutral (driving straight) and lower sensitivity at different turning angles.
Sse selects between a fixed steering sensitivity, variable to steering actuator position or vehicle speed.
Operation Manual
PVED-CL Controller for Electro-Hydraulic Steering, Version 1.38
Steering by Steering Wheel – Closed Loop
54 | © Danfoss | May 2016 11025583 | AQ00000216en-US0302