根据脱粒滚筒系统复杂性、延时性和难以确定精确数学模型的特点,提出一种基于模糊控制技术,用单片机设计模糊控制器,实现对联合收割机脱粒滚筒转速自动控制。根据硬件功能将系统划分为4个主要的功能模块,即传感器、A/D和D/A转换电路、8031构成的模糊控制器、输出控制电路、工况显示及报警电路,并针对每个功能模块分别进行了硬件设计。 According to the complexity, time delay and difficulty of determining precise mathematical model of threshing cylinder system, a fuzzy controller based on fuzzy control technology is proposed to design the fuzzy controller with MCU to realize the automatic control of the threshing cylinder speed of the combine harvester. According to the hardware function, the system is divided into four main functional modules, namely sensor, A / D and D / A conversion circuit, fuzzy controller composed of 8031, output control circuit, condition display and alarm circuit, and for each function The module has carried on the hardware design separately.