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JSIR Vol.65(02) [February 2006] >

Title: Implementation of fuzzy temperature control using microprocessor
Authors: Hanamane, M D
Mudholkar, R R
Jadhav, B T
Sawant, S R
Keywords: Duty cycle
Fuzzy logic
Temperature control
Issue Date: Feb-2006
Publisher: CSIR
IPC CodeG06N7/02; G05D23/00
Abstract: Fuzzy Logic has been employed to control temperature by varying ON-time of heater through PPI 8255. Thermister is used as a temperature sensor forming the resistive component of RC-Timer of IC 555 operated in novel Astable mode. The actual temperature is read as a function of frequency and compared with corresponding count of set-point temperature. The error-count is used to trigger the Fuzzy Inference process. This develops an overall duty for heater control that maintains the temperature of furnace to the set value. The hardware implementation followed by flow chart depicting the software approach has been given. The results are satisfactory when the duty cycle is around 50%.
Page(s): 142-147
ISSN: 0975-1084 (Online); 0022-4456 (Print)
Source:JSIR Vol.65(02) [February 2006]

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