TY - JOUR
T1 - Development of feedback control systems for an oscillating plasma jet
AU - Nishiyama, Hideya
AU - Sato, Takehiko
AU - Shiozaki, Yuichi
N1 - Funding Information:
The present study was partly supported by a grant-in-aid for Scientific Research (B) (2002, 2003) from the Japan Society for Promotion of Science. The authors would like to thank senior technician Mr. Kazunari Katagiri, student Mr. Tomohiko Sawada with Institute of Fluid Science, Tohoku University and Mr. Hirotake Watashima with Quattro Systems & Co. for their eager helps in experiments.
Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2004/4/19
Y1 - 2004/4/19
N2 - The dependencies of fluctuating characteristics of a plasma jet such as gas temperature, radiation intensity, electron temperature, electron density, jet length and jet width on the applied magnetic flux density and oscillation frequency are experimentally clarified, when the oscillating flow is injected into a non-equilibrium plasma jet as a disturbance. It is found that the radiation intensity is selected as an adjustable controlled variable, and the magnetic flux density as a manipulated variable, respectively, for feedback control system. Because all the fluctuating characteristics are suppressed effectively by applying magnetic field and the radiation intensity especially has a rapid response to the applied magnetic field. Finally, feedback control system is successfully constructed for an oscillating plasma jet to increase process efficiency in a stable plasma spraying for example. Constant value control of radiation intensity fluctuation and jet width fluctuation are achieved by using PID control method to stabilize an oscillating plasma jet.
AB - The dependencies of fluctuating characteristics of a plasma jet such as gas temperature, radiation intensity, electron temperature, electron density, jet length and jet width on the applied magnetic flux density and oscillation frequency are experimentally clarified, when the oscillating flow is injected into a non-equilibrium plasma jet as a disturbance. It is found that the radiation intensity is selected as an adjustable controlled variable, and the magnetic flux density as a manipulated variable, respectively, for feedback control system. Because all the fluctuating characteristics are suppressed effectively by applying magnetic field and the radiation intensity especially has a rapid response to the applied magnetic field. Finally, feedback control system is successfully constructed for an oscillating plasma jet to increase process efficiency in a stable plasma spraying for example. Constant value control of radiation intensity fluctuation and jet width fluctuation are achieved by using PID control method to stabilize an oscillating plasma jet.
KW - Feedback control
KW - Flow oscillation
KW - Magnetic field
KW - Plasma jet
KW - Radiation intensity
KW - Thermal spraying
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U2 - 10.1016/j.vacuum.2003.12.091
DO - 10.1016/j.vacuum.2003.12.091
M3 - Conference article
AN - SCOPUS:1842425308
VL - 73
SP - 691
EP - 697
JO - Vacuum
JF - Vacuum
SN - 0042-207X
IS - 3-4
T2 - The 4th International Symposium on Applied Plasma Science
Y2 - 1 September 2003 through 5 September 2003
ER -