Communication Between
Load Simulator &
Vehicle Simulator
>>Comunication with the Vwhicle Simulator RACER<<
In order to generate close to reality forces, a vehicle simulator is used, RACER. RACER is a
PC-based vehicle simulator. Expansion has been made in order to enable UDP/TCP
communication with its surroundings. The communication between the load simulator and
the vehicle model is done with a microprocessor unit called Ethernut. The Ethernut works as
a repeater and translates the UDP-packages to analog signals and vice versa. Thanks to the
vehicle simulator, a graphical interface is available to the driver.
Vehicle Simulator
Load Simulator
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Ethernut
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2
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Signals from the driver.
Inputs signals from the driver, (throttle, break
and steering wheel angle etc.), are used in the
vehicle model to calculate the aligning torque
generated by the slip between road and tires.
The aligning torque is recalculated to tie-rod
forces, which are to be applied to the steering
rack.
The Load Simulator applies the forces
calculated by the vehicle model. The load is
generaded by a hydraulic cylinder and the
force loop. The force is measured by a force
sensor between the load cylinder and the
steering rack.
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Inputs from the Driver
Analog signals
Digital signals
UDP/TCP Communication
Marcus Rösth
[email protected]
Mekaniksystem
Copyright M Sethson 2001