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http://dx.doi.org/10.5916/jkosme.2009.33.7.1003

A Study on High Precision Temperature Control of an Oil Cooler for Machine Tools Using Hot-gas Bypass Method  

Jung, Young-Mi (Pukyong National University, Division of Mechanical Engineering)
Byun, Jong-Yeong (Pukyong National University, Graduate School of Refrigeration & Air-conditioning Engineering)
Yoon, Jung-In (Pukyong National University, Division of Mechanical Engineering)
Jeong, Seok-Kwon (Pukyong National University, Division of Mechanical Engineering)
Publication Information
Journal of Advanced Marine Engineering and Technology / v.33, no.7, 2009 , pp. 1003-1011 More about this Journal
Abstract
This study aims at precise control of oil outlet temperature in the oil cooler system of machine tools for enhancement of working speed and processing accuracy. PID control logic is adopted to obtain desired oil outlet temperature of the oil cooler system with hot-gas bypass method. We showed that the gains of PID controller could be easily determined by using gain tuning methods to get the gain of PID controller without any mathematical model. We also investigated various gain tuning methods to design the gains of PID and compared each control performance for selecting the optimal tuning method on the hot gas bypass method through experiments. Moreover, we confirmed excellent control performance with proposed PI controller gain even though disturbances were abruptly added to the experimental system.
Keywords
Oil Cooler; Hot-gas Bypass Method; PI Control; Electronic Expansion Valve; Gain Tuning;
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