Electronic control system for a work implement

Details Electronic control system for a work implement Electronic control system for a work implement

1983-11-03

1987-04-21

Stouffer, Richard T.

Earth working

Automatic power control

Draft responsive

172 7, 318624, 318636, A01B 63112

Patent

active

046589082

ABSTRACT:
A tractor control system has a work implement, an actuator for the work implement, an electronic circuit utilizing an analog/digital technique and including an analog/digital control unit and a device for measuring a factor dominating the performance of the actuator and providing a first signal representing the actual value of the control system, a second signal representing a set point value, and a third signal in analog form representing the difference between the values of the first and second signals. The difference constitutes the control deviation for governing the analog/digital control unit which controls the actuator. A converter converts the third signal to digital form by a sampling device for sampling at a sampling frequency f.sub.o to establish a dead range in a time dimension. The sampling device provides pulses. A comparator circuit processes the digital signal and includes comparators having limit values defining the dead range set therein. Thus, when the amplitude of the pulses established by the sampling falls outside the dead range one or more times, the sampling device provides a transition to continuous following of the control deviation, thereby performing a requisite control so that when the value of a fourth signal derived from the control deviation falls into the dead range the sampling is repeated.

REFERENCES:
patent: 3568570 (1971-03-01), Winders
patent: 3736486 (1973-05-01), Gould et al.
patent: 3736845 (1973-06-01), Weiste et al.
patent: 4294162 (1981-10-01), Fowler et al.
patent: 4300638 (1981-11-01), Katayama et al.
patent: 4343365 (1982-08-01), Rajagopal et al.

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