Vehicle Profile - Auto Test AUTOmonitor Manual

AutoMonitor User Manual Version 7.22

3.3.1 Vehicle Profile

The vehicle parameters required by AutoMonitor to predict an impending rollover situation are
illustrated in the following diagram.
H
As the weight of the vehicle is increased, the centre of gravity height (h
height of the Cg point, the more the vehicle's stability will be sensitive to the lateral force. The
centre of gravity point is calculated from the current mass of the vehicle, the gross mass limit and
the tare mass.
Weight Type
Gross Weight
Tare Weight
Current Mass
There are three configurable methods used by the AutoMonitor to calculate the centre of gravity
height of the vehicle.
C.g. Calc. Method
Mixed Freight
Uniform Density
Fixed c.g. height
W
h
Cg
s
h
t
w
t
Figure 16: Vehicle rollover sensing parameters
W Total width of the vehicle
H Total height of the vehicle
L
Total length of the vehicle
h Centre of gravity height
cg
w
Track width
t
h Tyre height
t
h
Suspended height
s
Cg Centre of gravity
Table 10: Vehicle related rollover sensing parameters
Description
Total weight of the vehicle when fully loaded
Total weight of the vehicle when not loaded (empty)
Current mass of the vehicle
Table 11: Vehicle mass related parameters
Description
It is assumed that 70% of the payload is located at the bottom half
of the vehicle, and 30% of the payload is located in the top half.
The maximum height of c.g. point is therefore around 40% of the
maximum height of the payload.
The height of the c.g. point rises linearly with payload. The
maximum height of the c.g. point is reached to the maximum height
of the vehicle when the payload is at maximum.
The c.g. point defined by the user and always remains constant.
Changes in vehicle mass will not change the value of c.g. height.
Table 12: Centre of gravity point calculation methods
Cg
h
cg
L
) rises. The higher the
cg
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