A control approach to regulate formaldehyde concentrations indoors a gross anatomy laboratory via a switched fuzzy logic system

E. J. Herrera-López, N. Pitalúa-Díaz*, J. E. Pliego-Sandoval, R. Femat, L. Velazquez, N. Munguia, A. González-Angeles

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

In this paper, a switching fuzzy logic controller (SFLC) was proposed to reduce formaldehyde (FA) concentrations in a gross anatomy laboratory. At large vapor levels a hasty fuzzy logic controller (HFLC) first is activated to decrease the hazardous concentration. A switching criterion enables a second precise fuzzy logic controller (PFLC) that smoothly takes the systems output near the desired set-point. An adaptive algorithm allowed the SFLC to select the proper number of extraction systems from 3, 6, or 9 devices. The simulated performance of the fuzzy controller was satisfactorily decreasing and stabilizing the FA concentration even in the presence of parametric disturbances at set-point values of 0.37 mg/m3 and 0.29 mg/m3. However, the performance of the SFLC deteriorated as the number of dissection tables >35. The results showed that SFLC can be considered as a promising strategy to ensure indoor air quality in gross anatomy laboratories.

Original languageEnglish
Article number107492
JournalBuilding and Environment
Volume188
DOIs
StatePublished - 15 Jan 2021

Bibliographical note

Funding Information:
The authors thank the Universidad of Sonora and the Centro de Investigaci?n y Asistencia en Tecnolog?a y Dise?o del Estado de Jalisco A.C. for supporting this research.

Funding Information:
The authors thank the Universidad of Sonora and the Centro de Investigación y Asistencia en Tecnología y Diseño del Estado de Jalisco A.C. for supporting this research.

Publisher Copyright:
© 2020 Elsevier Ltd

Keywords

  • Formaldehyde
  • Fuzzy system
  • Gross anatomy laboratory
  • Switched controller
  • VOCs
  • Well mixed room model

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