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2020 Vol.52, Issue 5 Preview Page
Research on Fuzzy Fractional Order PID Control of Liquid Temperature in Displacement Digester
Minghui Li1†
,
Wenkai Wu2
,
Xingkui Yang3
1College of Mechanical and Electrical Engineering, Shaanxi University of Science & Technology, Xi’an, Shaanxi Province, 710021, Professor
2College of Mechanical and Electrical Engineering, Shaanxi University of Science & Technology, Xi’an, Shaanxi Province, 710021, student
3College of Mechanical and Electrical Engineering, Shaanxi University of Science & Technology, Xi’an, Shaanxi Province, 710021, student
†Corresponding author: E-Mail: 932249530@qq.com (Address: College of Mechanical and Electrical Engineering, Shaanxi University of Science & Technology, Xi’an, Shaanxi Province, 710021, People’s Republic of China)
30 October 2020. pp. 15-30
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Abstract

In order to reveal the delay and nonlinear characteristics of cooking liquid in the heating process, PID heating control would produce overshoot. In this paper, the traditional cascade PID control was designed to control the temperature of cooking pot. The analysis of the experimental results showed that the PID control method would cause a large overshoot, which was easy to cause the temperature control out of control phenomenon, and it was easy to cause a large temperature difference between the top and bottom parts of the cooking liquid. Therefore, by combining fractional order PID control with fuzzy logic control, a fuzzy fractional order PID cascade decoupling control strategy was proposed. Finally, compared with traditional cascade PID control, this method could realize online adjustment and optimization of fractional PID controller parameters, and could effectively improve the dynamic characteristics of liquid temperature control system, which proved the feasibility of this control strategy.

Keywords
Displacement digester
liquid temperature
Fuzzy fractional order PID controller
References

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Information
  • Publisher :Korea Technical Association of The Pulp and Paper Industry
  • Publisher(Ko) :한국펄프종이공학회
  • Journal Title :Journal of Korea TAPPI
  • Journal Title(Ko) :펄프종이기술
  • Volume : 52
  • No :5
  • Pages :15-30
  • Received Date : 2020-07-21
  • Revised Date : 2020-09-23
  • Accepted Date : 2020-09-25
  • DOI :https://doi.org/10.7584/JKTAPPI.2020.10.52.5.15
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