Vehicle Speed Dependent Closed Loop Control - Danfoss PVED-CLS User Manual

ENGINEERING TOMORROW

12.4 VEHICLE SPEED DEPENDENT CLOSED LOOP CONTROL

As each application is different, Danfoss has implemented a speed dependent closed loop control gain, configurable
for each Auto-guidance controller (hence individual parameters for both GPS and GPS2). When using an auto-
guidance function, the PVED-
vehicle speed.
GPS
The range is from 0 to 100 kmph for P3479 to P3483 and from 0 to 200 [%] for P3473 to P3478.
GPS2
The range is from 0 to 100 kmph for P3491 to P3495 and from 0 to 200 [%] for P3485 to P3490.
These parameters represent the six points on the curve below (Point P, Q, R, S, T and U). The Auto-guidance algorithm
will make linear interpolation in between each of the six points. The operator is free to move the six points in any
direction, limited by the following rules:

Point P is always specified at Vehicle speed = 0 Kmph


Point U Closed loop gain
Important
Danfoss recommends using fixed gain. Use speed dependent gain only if necessary.
GPS - Vehicle speed dependent closed loop control
35
30
25
20
Point P
15
10
5
0
0 5
Auto-guidance control algorithm can vary the closed loop gain, dependent on the
etc.
Point R
Point Q
10 15 20
Vehicle speed [kmph]
U Vehicle vehicle speeds above Point U Vehicle
Point U
Point T
Point S
25 30
Figure 49
35 40 45
Vehicle
50