Method for controlling an attachment to agricultural tractors

Details Method for controlling an attachment to agricultural tractors Method for controlling an attachment to agricultural tractors

1987-04-20

1989-11-07

Picard, Leo P.

Earth working

Automatic power control

172 3, 172 4, 172 7, A01B 6311

Patent

active

048785431

ABSTRACT:
A method of controlling an attachment to an agricultural tractor in which the absolute movement of the attachment is determined by a motion sensor mounted thereon and is utilized as a control standard while the relative motion of the attachment with respect to the tractor, influenced by the controller and carried out by a power lift, is determined in such a way that the absolute movement of the attachment becomes zero. This control method achieves that the attachment maintains a constant position in space in spite of the pitch movements of the tractor acting as disturbances. This guarantees an automatic tilling process, for instance a uniform depth of the furrows when plowing. By utilizing superimposed feedbacks of further control standards, such as relative position and motor load, changes in the absolute position of the attachment are possible and overloading of the motor is avoided.

REFERENCES:
patent: 4282933 (1981-08-01), Suganami et al.
patent: 4385353 (1983-05-01), Schneider
patent: 4423785 (1984-01-01), Kurihara et al.
patent: 4535847 (1985-08-01), Hasegawa et al.

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