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http://dx.doi.org/10.3795/KSME-A.2012.36.7.797

Auto Tuning of Position Controller for Proportional Flow Control Solenoid Valve  

Jung, Gyu-Hong (Dept. of Computer Aided Mechanical Design Engineering, Daejin Univ.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.36, no.7, 2012 , pp. 797-803 More about this Journal
Abstract
Proportional solenoid valves are a modulating type that can control the displacement of valves continuously by means of electromagnetic forces proportional to the solenoid coil current. Because the solenoid-type modulating valves have the advantages of fast response and compact design over air-operated or motor-operated valves, they have been gaining acceptance in chemical and power plants to control the flow of fluids such as water, steam, and gas. This paper deals with the auto tuning of the position controller that can provide the proportional and integral gain automatically based on the dynamic system identification. The process characteristics of the solenoid valve are estimated with critical gain and critical period at a stability limit based on implemented relay feedback, and the controller parameters are determined by the classical Ziegler-Nichols design method. The auto-tuning algorithm was verified with experiments, and the effects of the operating point at which the relay control is activated as well as the relay amplitude were investigated.
Keywords
Proportional Flow Control Solenoid Valve; Positioner; Auto Tuning; PI Controller;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
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