Development of feedback control systems for an oscillating plasma jet

被引：3
|
作者：
Nishiyama, H
Sato, T
Shiozaki, Y
机构：
[1] Tohoku Univ, Inst Fluid Sci, Electromagnet Intelligent Fluids Lab, Intelligent Fluid Syst Div,Aoba Ku, Sendai, Miyagi 9808577, Japan
[2] Toshiba Co Ltd, Fucha, Tokyo 1838511, Japan
来源：
VACUUM | 2004年 / 73卷 / 3-4期
关键词：
plasma jet; flow oscillation; radiation intensity; magnetic field; feedback control; thermal spraying;
D O I：
10.1016/j.vacuum.2003.12.091
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
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. (C) 2004 Elsevier Ltd. All rights reserved.
引用
收藏
页码：691 / 697
页数：7
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