HVAC Control in the New Millennium.pdf - HVAC.Amickracing

Artificial Intelligence, Fuzzy Logic and Controlgram and a human plays one side of the game. At the beginning of thegame all the pieces are lined up on the board.When a game is completed, if the machine loses, it removes fromits list of possible moves the last move it made. This is how the programlearns from its mistakes. It is not able to make the same bad move twice.The program does not know that it has won or lost the game. It onlyknows that it cannot find a legal move with which to continue the game.It takes a number of losses to become a good player.Another type of intelligence consists of building one’s knowledgeon the basis of previous knowledge. The computer game of Animal usesthis type of artificial intelligence learning.The program asks the human player to think of the name of ananimal so that the program can try to guess it. If the program cannotguess the name, it asks the human player to type in a question thatwould distinguish the new animal from the last animal the computerguessed. The program saves all the information given to it and uses thisinformation in future guesses. In a real-time environment the computerneeds to interpret sensory inputs in time to use the information for thepresent task. Artificial intelligence programs work at a batch-level mode.A batch mode of operation means that a device processes the informationat its own convenience. Artificial intelligence devices need to becomefaster and less expensive if they are to give practical senses toenvironmental control.As research in artificial intelligence brings new and improved sensorcapabilities, this will allow more complicated tasks in HVAC. Artificialintelligence will help enable the system to work with incompleteand uncertain knowledge. It will provide help to select the right equipmentor system. It will allow the system to diagnose unexpected problemsand work around them.Fuzzy Logic and Plant ControlOne way artificial intelligence may affect HVAC control is by allowingit to handle problems that do not have exact solutions. Theserequire the controller to work with fuzzy logic. Fuzzy logic problemsdeal with situations that have several gray areas and may have severalreasonable solutions. The objective is to find the best of these possiblesolutions. The use of fuzzy logic can greatly increase the system’s func-©2001 by The Fairmont Press, Inc. All rights reserved.