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US 5,289,367 AGranted
Numerical control apparatus using fuzzy control
AssigneeFanuc Corporation
InventorsTakao Sasaki, Kentaro Fujibayashi, Takashi Endo
Life of this patent
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Abstract
A numerical control apparatus for adaptively controlling a servo apparatus, wherein a load current (Ln) and a velocity (Vn) of a spindle motor (74) are used as a fuzzy input. In response to the fuzzy input, a fuzzy control means (80) effects a fuzzy inference to output a velocity control signal (Cng) for controlling the velocity of the spindle motor (74). This control of the velocity of the spindle motor (74) with the velocity control signal (Cng) makes it possible to effect a smooth velocity control.
Claims7
A numerical control apparatus for adaptively controlling a servo apparatus, comprising:
- input means for receiving fuzzy input including data of a load current and a velocity of the servo apparatus;
- and
- fuzzy control means for effecting a fuzzy interference using predetermined membership functions of the load current and velocity by receiving the fuzzy input and outputting a velocity control signal as an override control signal for controlling the velocity of the servo apparatus.
Dependencies are inferred from the claim text.