Fuzzy control is a practical alternative for a variety of challenging control applications since it provides a convenient method for constructing nonlinear controllers via the use of heuristic information. Such heuristic information may come from an operator who has acted as a “human-in-the loop” controller for a process. In the fuzzy control design methodology, we ask this operator to write down a set of rules on how to control the process, and then we incorporate these into a fuzzy controller than emulates the decision-making process of the human. In other cases, the heuristic information may come from a control engineer who has performed extensive mathematical modeling, analysis, and development of control algorithms for a particular process. Again, such expertise is loaded into the fuzzy controller to automate the reasoning processes and actions of the expert. Regardless of where the heuristic control knowledge comes from, fuzzy control provides a user-friendly formalism for representing and implementing the ideas we have about how to achieve high-performance control.
In this article, the author proposes to combine the fuzzy control with the computer control technique in an effort to fulfill the operations required by the refrigerator .Fuzzy control, in essence, belongs to the category of the nonlinear control. It works well with the simple control objects, for the much complex procedures about which not enough is known yet or too intricate to peer through, the Fuzzy control succeeds as well.
In this article, Fuzzy refrigerator have functions of fuzzy controlling temperature, intelligent defrosting and automatic trouble shoot. At the same time they have advantage so perfect accuracy, high performance, saving electricity and keeping fresh food of high quality. it is the main orientation of developing refrigerators. The application of fuzzy controlling techniques to refrigerator was discussed. Its structure of hard ware system and design of soft ware system were analyzed.
Keywords: refrigerator; fuzzy quantity; fuzzy control; hardware; software