| 摘要: |
| 目的 为提高食品包装产品的袋形质量和热封质量，提出一种提高食品包装机热封温度控制精度和稳定性的方法。方法 针对食品包装中塑料薄膜热封温度控制系统的稳定性和精确度不佳，造成包装材料过度收缩、封口不严等质量问题，设计双模糊控制器对PID参数进行在线整定，当温度偏差较大时采用模糊控制1进行粗调，以实现较快的动态响应；当温度偏差较小时采用模糊控制器2进行精调，以实现较好的稳态精度。并将双模糊PID控制器与传统PID、模糊PID控制器进行仿真对比。结果 Matlab仿真结果表明，双模糊PID控制器具有调节速度快、鲁棒性强、超调量小的优点，可以有效提升控制系的控制精度和稳定性。结论 双模糊PID控制器自适应能力强，能够克服食品包装机热封温度控制系统非线性、时变性等缺点，实现了包装机热封温度快速稳定调节。实验测试表明，将热封温度偏差控制在±1.5 ℃以内，在一定程度上提升了食品包装质量和设备自动化水平。 |
| 关键词: 食品包装机 热封 双模糊PID Matlab |
| DOI：10.19554/j.cnki.1001-3563.2019.17.027 |
| 分类号:TB486 |
| 基金项目:西京学院校基金（XJ170130） |
|
| Heat-sealing Temperature Control of Food Packaging Machine Based on Double Fuzzy PID |
|
YANG Na, WU Kun
|
|
Xi Jing University, Xi'an 710021, China
|
| Abstract: |
| The work aims to propose a method of improving the control accuracy and stability of heat sealing temperature of food packaging machine, in order to improve the bag shape quality and heat sealing quality of food packaging products. In view of the poor stability and accuracy of the temperature control system of plastic film heat sealing in food packaging, which caused the quality problems of packaging materials such as excessive shrinkage and improper sealing, a double fuzzy controller was designed to tune the PID parameters online. When the temperature deviation was large, the fuzzy controller 1 was used for rough tuning to achieve faster dynamic response. When the temperature deviation was small, the fuzzy controller 2 was used for fine tuning to achieve better steady-state accuracy. The double fuzzy PID controller was compared with the traditional PID and the fuzzy PID controller by simulation. The simulation results of Matlab showed that, the double fuzzy PID controller had the advantages of fast regulation speed, strong robustness and small overshoot, and it could effectively improve the control accuracy and stability of the control system. The double fuzzy PID controller has strong self-adaptive ability. It can overcome the non-linear and time-varying characteristics of the temperature control system of heat sealing of food packaging machine, and realizes the fast and stable regulation of the heat sealing temperature of the packaging machine. Experiments show that, the temperature deviation of heat sealing is controlled within ±1.5 ℃, which improves the quality of food packaging and the automation level of equipment to a certain extent. |
| Key words: food packaging machine heat-sealing double fuzzy PID Matlab |
渝公网安备 50010702501716号