Fuzzy control apparatus generating a plurality of membership functions for determining a drive condition of an electric vacuum cleaner
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsMasaru Moro, Tadashi Matsuyo, Seiji Yamaguchi, Shuji Abe, Hidetoshi Imai
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Abstract
A control apparatus of an electrical appliance comprising a sensor for detecting a physical amount; and a fuzzy inferring device for determining the drive condition of a load by fuzzy inference based on a signal outputted from the sensor, and wherein the sensor has at least one normalized membership function to be used by fuzzy inference and achieves a plurality of membership functions which can be expressed by congruent curves by performing a predetermined subtraction or an addition on the signal outputted from the sensor.
Claims3
An electric vacuum cleaner including a suction channel, said electric vacuum cleaner comprising:
- a fan motor for generating suction force to draw dust particles through said suction channel;
- dust detecting means for detecting dust particles passing through said suction channel and for generating a signal responsive to the quantity of dust particles;
- dust counting means for counting each generation of said signal by said dust detecting means in a given interval and for generating a further signal based upon said count;
- fuzzy inferring means for processing said further signal and a normalized membership function in order to generate a plurality of membership functions, each of said plurality of membership functions having a curvature substantially identical to the said normalized membership function, said fuzzy estimation means further including means for determining a drive condition based upon said plurality of membership functions;
- and
- power control means for controlling the fan motor in accordance with the drive condition determined by the fuzzy estimation means.
Dependencies are inferred from the claim text.