用于食品冷冻温度控制的模糊控制系统设计  

The design of fuzzy control system for food freezing temperature control

作　　者：刘向勇[1] 高雪飞 董强 李琼 LIU Xiangyong;GAO Xuefei;DONG Qiang;LI Qiong(Zhongshan Technician College,Zhongshan,Guangdong 528400,China;Guangdong University of Technology,Guangzhou,Guangdong 510006,China;South China Agricultural University,Guangzhou,Guangdong 510642,China)

机构地区：[1]中山市技师学院,广东中山528400 [2]广东工业大学,广东广州510006 [3]华南农业大学,广东广州510642

出　　处：《食品与机械》2023年第11期116-124,共9页Food and Machinery

基　　金：广东省教育教学研究课题(编号:KT2020028);中山市重大科技专项课题(编号:2022A1019)。

摘　　要：目的:提高食品进入冷冻隧道的速度控制回路和温度控制回路的设定值调整能力。方法:对传送带速度和温度控制回路进行了单独处理,设计用于食品冷冻温度控制的模糊控制系统。该控制系统包括用于食品传送带滚子转速的比例—积分—微分控制器、用于冷冻隧道温度调节的比例—积分控制器,并采用Takagi-Sugeno模糊控制器来设定温度调节比例—积分控制器的温度设定点。结果:待冷冻食品的质量流量从650 kg/h增加到700 kg/h、驱动辊的转速从1.62 r/min增加到1.75 r/min时,最终食品温度可快速恢复到约-18℃;食品入口发生+5℃的温度干扰时,模糊控制器动作,从而将食品的出口温度保持在预期值-18℃附近。结论:所设计的控制系统通过选择允许快速响应和相对较低超调的系统参数,可实现输出变量的值不会在设定值附近出现大幅波动。Objective:Improving the setting value adjustment ability of the speed control loop and temperature control loop of food entering the freezing tunnel.Methods:By treating the speed and temperature control circuits of the conveyor belt separately,a fuzzy control system for food freezing temperature control was designed.The control system included a proportional-integral-differential controller for the food conveyor roller speed,a proportional-integral controller for temperature regulation in the freezing tunnel,and a Takagi-Sugeno fuzzy controller to set the temperature set point of the temperature regulation proportional-integral controller.Results:When the mass flow rate of frozen food was increased from 650 kg/h to 700 kg/h,and the speed of the drive roller being increased from 1.62 r/min to 1.75 r/min,the final food temperature could be quickly restored to about-18℃.When a temperature disturbance of+5℃occurred at the food inlet,the fuzzy controller acts to keep the food outlet temperature near the expected value of-18℃.In summary,by selecting system parameters that allow fast response and relatively low overshoot,the designed control system can realize that the value of the output variable does not fluctuate greatly near the set value.Conclusion:The research results can be used to develop the food freezing temperature control system in the food processing plant of the cryogenic freezing tunnel,and improve the ability of food freezing temperature control.

关 键 词：食品冷冻 比例—积分—微分控制 系统识别 模糊控制 Takagi-Sugeno控制 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置] TS203[自动化与计算机技术—控制科学与工程]