Agricultural harvester ground tracking control system and method

Details Agricultural harvester ground tracking control system and method Agricultural harvester ground tracking control system and method

1995-11-06

1998-01-06

Melius, Terry Lee

Harvesters

Motorized harvester

With condition-responsive operation

56208, 56DIG15, A01D 3486, A01D 7528

Patent

active

057042004

ABSTRACT:
A method and control system for an agricultural harvester having a frame and a cut crop receiving header coupled to a hydraulic cylinder. The header has a cutter pivotably mounted on its bottom. The header has a height relative to the frame that is adjusted by applying fluid under pressure to the cylinder. A first control valve is fluidly coupled to the cylinder and responsive to a first input signal for increasing fluid pressure in the cylinder to raise the header. A second control valve is fluidly coupled to the cylinder and responsive to a second input signal for reducing fluid pressure in the cylinder to lower the header. An electrical flex angle signal is produced, representing a flex angle between the bottom of the header and the cutter. A plurality of local maximum and minimum values of the flex angle signal are measured as the cutter passes over respective maxima and minima of a height of the ground relative to the frame. The local maximum and minimum values are identified and stored. A fuzzy inferring device determines the first and second input signals by fuzzy inference based on the plurality of local maximum and minimum values.

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