Tracked vehicle closed loop steering system

Details Tracked vehicle closed loop steering system Tracked vehicle closed loop steering system

B - Operations, Transporting

62

D

B62D 11/16 (2006.01) B62D 11/18 (2006.01)

Patent

CA 2307829

A control system is provided for a tracked vehicle drive/steering system which has an engine driven hydraulic steering pump which drives a hydraulic steering motor. The steering pump is responsive to steering pump control signals, and an operator manipulated steering wheel generates steering command signals. A steering motor provides an input to a differential track drive mechanism which responds to manipulation of the steering wheel and drives left and right tracks, turning the vehicle. The control system includes a steering wheel position sensor, a steering motor position sensor and a wheel speed sensor. The control system generates a motor displacement value as a function of the steering wheel position and the wheel speed. The control system also generates a motor target position value as a function of the motor displacement, and generates a motor desired position value as a function of the target position value. The control system also generates a motor position error value as a function of the desired position value and of the actual steering motor position signals, and generates the steering pump control signals as a function of the steering motor position error signals.

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