6. STEERING SYSTEM
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6.1.1 OUTLINE OF STEERING SYSTEM
As shown in Fig. 6.1, the steering system is composed of a steering gearbox, actuator, and controller.
The steering gearbox is provided with a potentiometer which detects the steering handwheel
operating force and sends to the controller a signal which corresponds to the strength and direction of
the force. The controller converts the signal from the potentiometer into the direction and amount of
electric current which fl ows into the motor. If an external force is applied to the steering wheel, the
potentiometer detects that force and the actuator generates a force of the same strength in the reverse
direction so that no shock is felt at the handwheel.
The controller is incorporated in the speed controller inside the counterweight.
EPS ACTUATOR
Fig. 6.1 Steering System
FILTER
BATTERY
CONTROLLER
POTENTIOMETER
EPS MOTOR
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