Method and apparatus for controlling draft of an agricultural im

Details Method and apparatus for controlling draft of an agricultural im Method and apparatus for controlling draft of an agricultural im

1995-04-17

1997-11-04

Elmore, Reba I.

Boots, shoes, and leggings

36442407, 172 2, 172 4, 172 8, G05B 1918

Patent

active

056846916

ABSTRACT:
A control system for regulating the elevational position of an implement carried or trailed by a vehicle, such as a tractor, includes draft force sensors for detecting the draft force produced by interaction of the implement with the ground, and a command device for setting a reference level of draft force. A control circuit coupled to the sensors and to the command device generates a draft force error signal representing the deviation of the sensed draft force from the desired level, and a draft force derivative signal representing the rate of change of the sensed draft force. The control circuit generates control signals for raising and lowering the implement following a predetermined control routine in response at least to the draft error signals. The rate of movement of the implement in response to the control signals is limited in response to the draft force error signal and the draft derivative signal. The limit on the rate of movement of the implement is preferably determined through fuzzy logic wherein the draft error signals and draft derivative signals are classified into sets and the rate limit is derived from the degree of membership of the signals in the sets. The control system also preferably generates a weight signal representative of the weight of the implement and membership functions defining the sets are selected based on categorization of the implement weight.

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