Embedded Smart Controller for an Industrial Reefer Refrigeration

1 This is an extended version of the paper presented to the 10 IEEE International Conference on Fuzzy Systems “Meeting the Grand Challenge: Machines that Serve People”, Melbourne, Australia, December 2-5, 2001 Abstract. The paper describes the development of a smart embedded fuzzy system for reefer refrigeration control. The goal of this project is twofold: to design an efficient and economically feasible intelligent industrial controller on one hand and to test and further develop a smart device design approach, which is based on design model formulation with the fuzzy rules given by an expert. Through prototyping and implementation on a generalpurpose microprocessor the system can then be tested and used to iteratively identify and control the plant until the desired control system criteria are achieved. The paper describes the design, implementation and testing of an embedded fuzzy controller as a simple, practical solution to a regulation problem in reefer refrigeration systems. By an application of the Motorola HC12 MCU with its inbuilt fuzzy logic instruction set a rapid prototype design was implemented and the application of fuzzy logic and iterative identification and control to general industrial refrigeration systems was found to be a possible economically feasible solution.