DEVICE FOR CONTROLLING CAR AIRCON BY FUZZY CONTROL

摘要

PURPOSE: An air conditioning control system for a vehicle is provided to improve control of an air conditioner and to keep indoor air of a vehicle pleasant by controlling operation of an intake door, a blower motor, an air mix door and a mode door as well as working of a compressor with a membership function of input/output variables and control rules. CONSTITUTION: An air conditioning control system of a vehicle consists of: a sensor interface unit(45) filtering and converting output signals of each sensor(20,25,30,35,40) into digital signals, setting target temperature from external air temperature and desired temperature, and outputting difference between the target temperature and indoor temperature and the absolute value thereof; a fuzzy inference unit(50) deciding control values of a blower motor and an air mix door by performing fuzzy inference of the temperature difference and the absolute value thereof, and outputting control values of an intake door and a mode door from the control values; and an operation unit(55) deciding operation by scale mapping of each control value from the fuzzy inference unit and controlling each drive unit according to the decided operation. The indoor temperature of a vehicle is adjusted by fuzzy control. Therefore, the indoor temperature is kept pleasant by considering actual sensible temperature of passengers.