Fuzzy Logic Theory-Based PI Controller Tuning for Improved Control of Liquid Level System

2020 ◽  
pp. 133-143
Author(s):  
K. Sandeep Rao ◽  
V. Bharath Kumar ◽  
V. N. Siva Praneeth ◽  
Y. V. Pavan Kumar
Keyword(s):  
Fuzzy Logic ◽  
Pi Controller ◽  
Liquid Level ◽  
Level System ◽  
Controller Tuning ◽  
Fuzzy Logic Theory

scholarly journals Design of PI controller for Liquid Level System using Siemens Distributed Control System

2019 ◽  
Vol 8 (3) ◽  
pp. 2783-2789
Keyword(s):  
Time Delay ◽  
Stability Region ◽  
Dead Time ◽  
Pi Controller ◽  
Liquid Level ◽  
Order System ◽  
System Response ◽  
Level System ◽  
Geometric Center ◽  
The Stability

The PI controller design for a liquid level system using the weighted geometric center method is discussed. Every real-time process have dead time. This dead time leads to the generation of oscillation in the system response. The oscillation generated due to dead time introduces instability in system performance. This paper presents a tuning method based on calculating a geometric center in the stability region for a higher order system. In this, the stability region calculated by plotting (Kp , Ki )-plane based on boundary locus stability technique. Further centre point computed in the stability locus by a geometric center method. This center point will provide Kp , Ki value for tuning the PI controller. The First Order Plus Dead Time (FOPDT) process considered to elaborate the method for computing the tuning parameters. A nonlinear time-delay system and a plant having time-delay response are controlled in simulation. The performance of the newly obtained PI controller based on weighted geometric center method is compared with the existing results to show the usefulness of the control scheme. Moreover, disturbance rejection ability of the newly obtained PI controller based on weighted geometric center method is demonstrated by applying disturbances. In addition, the designed controller implemented using Siemens DCS PCS7 V8.1 platform.

Fuzzy logic controller: Application to liquid-level system

1988 ◽  
Vol 5 (4) ◽  
pp. 186-192
Author(s):  
I. Shah ◽  
K. Rajamani
Keyword(s):  
Fuzzy Logic ◽  
Fuzzy Logic Controller ◽  
Liquid Level ◽  
Level System

Disturbance observer-based feedback linearization control for a quadruple-tank liquid level system

2021 ◽  
Author(s):  
Xiangxiang Meng ◽  
Haisheng Yu ◽  
Jie Zhang ◽  
Tao Xu ◽  
Herong Wu ◽  
...  
Keyword(s):  
Feedback Linearization ◽  
Disturbance Observer ◽  
Liquid Level ◽  
Level System ◽  
Feedback Linearization Control
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