Abstract
Quadruple tank liquid level systems are popular in testing multivariable control systems for multivariable processes with positive or negative zeros. The liquid level system is nonlinear and it will help to illustrate the robustness of control systems. However, due to nonlinearity, it can be cumbersome to obtain process parameters for testing linear control systems. Perturbation sizes are limited for valid linearized process models, requiring level sensors with high precision. A simple method where the outlet orifice is replaced to a long tube is proposed here. The effluent flow rate becomes proportional to the liquid level due to the friction loss of long tube and the liquid level system shows near linear dynamics. It is applied to the quadruple tank system for easier experiments.
| Original language | English |
|---|---|
| Pages (from-to) | 767-770 |
| Number of pages | 4 |
| Journal | Korean Chemical Engineering Research |
| Volume | 55 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - 2017 Dec |
Bibliographical note
Funding Information:This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (2016R1D1A1B03934408) and partially by the Kyungpook National University Research Fund.
Publisher Copyright:
© 2017 Korean Institute of Chemical Engineers. All rights reserved.
Keywords
- Hagen-Poiseuille equation
- Linear experimental system
- Liquid level system
- Quadruple tank system
ASJC Scopus subject areas
- General Chemical Engineering