Download Wilhelm_HIL_Thesis_BINDING_FINAL - UWSpace

120
4000
3500
100
3000
2500
60
2000
1500
40
Wheel speed [RPM]
Speed [kph]/Torque [N-m]
80
1000
20
500
0
0
2
4
6
8
10
12
0
14
-20
-500
Time (s)
speed
Front Torque Req
RPM
Figure 58: Regenerative braking control strategy not functioning as intended
The cause of this behaviour was eventually identified as a safety logic error. Redundant
safety checks to ensure that regenerative braking would be performed during forward
motion were not receiving the required input speeds to unlatch the regenerative braking
function. Once this error was identified and corrected, regenerative braking behaviour
shown as negative torque requests, circled in Figure 59, was obtained through the
software-in-the-loop modeling.
140
8000
120
7000
100
5000
60
4000
40
3000
20
2000
0
0
5
10
15
20
25
30
35
40
1000
-20
-40
0
Time (s)
speed
Front Torque Req
RPM
Figure 59: Regenerative braking control strategy functioning as intended
85
Wheel speed [rpm]
Speed [kph]/Torque [N-m]
6000
80