Earticle

초록

영어

Maintaining phosphoric slurry within the optimal temperature range is of great significance in improving the quality of the phosphoric acid product. Due to the lack of integral parts and the limited number of expert rules, general fuzzy controllers are commonly incapable of achieving accurate output. This paper proposed a novel fuzzy controller based on variable universes of discourse (VUD) to improve the accuracy of the temperature of phosphoric slurry. By tuning the motorized motor in the vacuum pump, the controller can obtain an appropriate vacuum degree in flash evaporators. With the online operation of contraction-expansion factors, fuzzy rules can be reproduced online, which is equivalent to the densification of fuzzy sets on universes of discourse. Thus, the output accuracy of VUD fuzzy controllers can be enhanced significantly. The experimental results show that VUD fuzzy controllers can tune the temperature of phosphoric slurry to within the optimal range and have a much better effect than general fuzzy controllers.

목차

Abstract
 1. Introduction
 2. The Structure of a VUD Fuzzy Vacuum Cooling System
 3. Design of VUD Fuzzy Controllers
  3.1 Contraction-expansion Factors and Membership Functions
  3.2 VUD Control Algorithm
  3.3 An Example of Numerical Calculation
 4. Experimental Results
 5. Conclusions
 References

키워드

저자

• Zuqiang Long [ Dept. of Physics and Electronics Information Science, Hengyang Normal University, Hengyang 421002, China ] Corresponding author’s
• Yuebing Xu [ College of Electrical and Information Engineering, Hunan University, Changsha 410082, China ]
• Long Li [ Dept. of Mathematics and Computational Science, Hengyang Normal University, Hengyang 421002, China ]

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  International Journal of Control and Automation

• 간기

  월간

• pISSN

  2005-4297

• 수록기간

  2008~2016

• 십진분류

  KDC 505 DDC 605