A CONTROL METHOD BASED ON AN ARTIFICIAL INTELLIGENCE TECHNIQUE AND ITS APPLICATION FOR CONTROLLING PLANT ENVIRONMENT
A computer-controlled growth chamber, in which leaf lettuce were grown under artificial light, was operated by this logic. Light level was independently controlled to simulate daily variation of solar radiation, while air temperature, relative humidity, and CO2 concentration were controlled according to the set points derived by the logic from the plant activities. Although the number of the rules was small, the plant environment in the growth chamber was controlled reasonably stable, and most of the changed environment by this method made the plant activities promote or keep good conditions. The control method using an artificial intelligence technique can be useful to control the plant environment in an actual greenhouse.