title: Control loop noise rejection using fuzzy logic.
abstract: This paper describes an application of fuzzy logic to noise rejection in a control loop. This new use of fuzzy logic solves the problem of sluggish control loop response when using a set-point range to stop constant valve chattering due to noise in the output signal being sent to a control valve. Multiple related variables and a general understanding of their inter-relationship must be available for this method to be successfully applied. An overview of the specific fuzzy logic method used for this application is presented along with guidelines for the practical application. In addition, this paper includes results from the successful implementation of fuzzy logic to a control loop on a pilot plant distillation column.
authors.affiliation: Department of Chemical and Petroleum Engineering, University of Calgary, Calgary, Alberta, Canada.
authors.forename: Glen
authors.initials: G
authors.lastname: Hay
authors.forename: William
authors.initials: W
authors.lastname: Svrcek
authors.forename: Timothy
authors.initials: T
authors.lastname: Ross
authors.forename: Brent
authors.initials: B
authors.lastname: Young
mesh_terms: D000465:Algorithms; D016477:Artifacts; D002617:Chemical Industry / Q000379:methods*; D003198:Computer Simulation; D005246:Feedback; D005285:Fermentation / Q000502:physiology; D017143:Fuzzy Logic; D015233:Models, Statistical; D010865:Pilot Projects; D013269:Stochastic Processes; D013598:Systems Theory