The Design of Improved Fuzzy Controller Based on MCU for Central Air Conditioner

A system structure and the procedure of fuzzy control of central air conditioner (CAC) in building are presented in this paper. Discuss the design of improved fuzzy controller about room temperature controller in detail, including the hardware design and software programming based on MCU (Micro programmed Control Unit). The functions of temperature controller are completed under the application that includes main program and interrupt service program that realizes the communication with the whole building via CAN bus. With the improved fuzzy control applied, it removes the stable error near the control point, and its rapidity is almost same as that of the table method. The result proved that this temperature control system realizes the reliable control of the central room air conditioner and the goal of saving energies in practices.