Automated pH Control of Nutrient Solution in Hydroponic System using Modified Fuzzy Logic Control
Article Sidebar
Main Article Content
Abstract
A hydroponic system can control many factors significantly, such as the amount of water and fertilizer. However, the system is a high investment and requires some skills to operate. The unsuitable quantity of pH can cause root damage from acidity and inadequate nutrient uptake. This paper presents the pH control in a nutrient solution using modified fuzzy logic control. The fuzzy logic control is a design based on experienced personal adjustment data. However, the defuzzification technique is modified to suit the controlled system using the area under an appropriately designed graph. From the results obtained from the prototype systems, it was found that the proposed system can control pH value in nutrient solution and reject disturbance better than the conventional P control system. Since the system can decide the proper quantity of acid and base automatically, the system can reduce human workload and reduce complicated procedures for the farmer.
Downloads
Article Details
Article Accepting Policy
The editorial board of Thai-Nichi Institute of Technology is pleased to receive articles from lecturers and experts in the fields of business administration, languages, engineering and technology written in Thai or English. The academic work submitted for publication must not be published in any other publication before and must not be under consideration of other journal submissions. Therefore, those interested in participating in the dissemination of work and knowledge can submit their article to the editorial board for further submission to the screening committee to consider publishing in the journal. The articles that can be published include solely research articles. Interested persons can prepare their articles by reviewing recommendations for article authors.
Copyright infringement is solely the responsibility of the author(s) of the article. Articles that have been published must be screened and reviewed for quality from qualified experts approved by the editorial board.
The text that appears within each article published in this research journal is a personal opinion of each author, nothing related to Thai-Nichi Institute of Technology, and other faculty members in the institution in any way. Responsibilities and accuracy for the content of each article are owned by each author. If there is any mistake, each author will be responsible for his/her own article(s).
The editorial board reserves the right not to bring any content, views or comments of articles in the Journal of Thai-Nichi Institute of Technology to publish before receiving permission from the authorized author(s) in writing. The published work is the copyright of the Journal of Thai-Nichi Institute of Technology.
References
T. Wada, “Theory and technology to control the nutrient solution of hydroponics,” in Plant Factory using Artificial Light, Japan: Elsevier, 2019, ch.1, sec.1.1, pp. 5-13.
T. Kaewwiset and T. Yooyativong, “Electrical conductivity and pH adjusting system for hydroponics by using linear regression,” in 14th ECTI-CON, Phuket, Thailand, Jun. 2017, pp. 761-764.
M. Fuangthong and P. Pramokchon, “Automatic control of electrical conductivity and pH using fuzzy logic for hydroponics system,” in 3rd ICDAMT, Chiangrai, Thailand, Feb. 2018, pp. 65-70.
R. C. Dorf and R. H. Bishop, “PID controllers,” in Modern Control System, 13th ed. Malaysia: Pearson Education, 2017, ch.7, sec.7.6, p. 479.
K. Ogata, “Tuning rules for PID controller,” in System Dynamic, 4th ed. Upper Saddle River, NJ, USA: Pearson Education, 2004, ch.10, sec.10, p. 566.
K. M. Passino and S. Yurkovich, “Fuzzy control: The basics,” in Fuzzy Control. Menlo Park, CA, USA: Addison Wesley Longman, 1998, ch.1, sec.1.3, p. 23.