The Fuzzy Inference System Translator (FIST) and Micro-Controller Regulation of Plant Growth Chamber Temperature and Humidity

The Fuzzy Inference System Translator (FIST) is a tool in the realization of standalone, fully-programmable, fuzzy logic micro-controllers for the regulation of advanced life support system temperature and humidity subsystems. Analog input signals may include chamber temperature, relative humidity, CO₂ concentration and nutrient level. Analog output signals can be, for example, heater voltage and condensing heat-exchanger cold-water valve voltage, nutrient pump actuator voltage and grow-lamp actuator voltage. Features of the micro-controller described, include keypad entry of sensor calibration data and online modification of the photo-period, temperature, humidity and CO₂ levels during full system operation. All system inputs and outputs can be selected for read-out on a liquid crystal display (LCD).