Exploration on Illuminance Control of Daylight Perceptive Lighting by Fuzzy Logic

Abstract—Basic concept of daylight perceptive lighting is that intensity of lamps are adjusted opposite to the trend of sun light intensity, so that constant illuminance on work surface is kept. The classic and compact arrangement of daylight perceptive lighting system were discussed, the compact was recommended from the view point of facilitating construction, although illuminance control by the classic is relative simpler than the compact. Considering visual character of human eyes, accurate illuminance control is not necessary; the key is how to use the character to realize a general policy. Through analysis and test, fuzzy logic is a good choice to illuminance control by the compact scheme. Based on fuzzy logic, elementary explore on illuminance equivalence fuzzifying control variable, was done and the possible membership function was given. Keywords-daylight perceptive lighting; illluminance control; fuzzy logic I