Abstract
The present article discusses a modeling and control of high–Tc superconducting levitation system. The paper first clarifies analytical expressions for obtaining nonlinear levitation force given by the present author, then presents a vibration control method in which feedback currents involving frequency weights. In the method, an addition of a square of the displacement and currents in a frequency domain is taken as a cost function. Optimal coefficients of the transfer function of the controller are obtained by minimizing the cost function. Hence, the spillover instability due to the nonlinear vibration will be reduced. Numerical calculations have been carried out for some typical problems. To validate the present method, experimental tests also have been carried out.
| Original language | English |
|---|---|
| Pages (from-to) | 2520-2527 |
| Number of pages | 8 |
| Journal | Nihon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C |
| Volume | 64 |
| Issue number | 623 |
| DOIs | |
| Publication status | Published - 1998 |
| Externally published | Yes |
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Keywords
- High Tc superconductor
- Levitation
- Modeling
- Nonlinear Spring
- Optimal Control Nonlinear Vibration
- Vibration Control
ASJC Scopus subject areas
- Mechanics of Materials
- Mechanical Engineering
- Industrial and Manufacturing Engineering
Cite this
Nonlinear Vibration Control for a High-Tc Superconducting Levitation System. / Nagaya, Kosuke; Tsukagoshi, Masato; Kosugi, Yasuhiro; Murakami, Masato.
In: Nihon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C, Vol. 64, No. 623, 1998, p. 2520-2527.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Nonlinear Vibration Control for a High-Tc Superconducting Levitation System
AU - Nagaya, Kosuke
AU - Tsukagoshi, Masato
AU - Kosugi, Yasuhiro
AU - Murakami, Masato
PY - 1998
Y1 - 1998
N2 - The present article discusses a modeling and control of high–Tc superconducting levitation system. The paper first clarifies analytical expressions for obtaining nonlinear levitation force given by the present author, then presents a vibration control method in which feedback currents involving frequency weights. In the method, an addition of a square of the displacement and currents in a frequency domain is taken as a cost function. Optimal coefficients of the transfer function of the controller are obtained by minimizing the cost function. Hence, the spillover instability due to the nonlinear vibration will be reduced. Numerical calculations have been carried out for some typical problems. To validate the present method, experimental tests also have been carried out.
AB - The present article discusses a modeling and control of high–Tc superconducting levitation system. The paper first clarifies analytical expressions for obtaining nonlinear levitation force given by the present author, then presents a vibration control method in which feedback currents involving frequency weights. In the method, an addition of a square of the displacement and currents in a frequency domain is taken as a cost function. Optimal coefficients of the transfer function of the controller are obtained by minimizing the cost function. Hence, the spillover instability due to the nonlinear vibration will be reduced. Numerical calculations have been carried out for some typical problems. To validate the present method, experimental tests also have been carried out.
KW - High Tc superconductor
KW - Levitation
KW - Modeling
KW - Nonlinear Spring
KW - Optimal Control Nonlinear Vibration
KW - Vibration Control
UR - http://www.scopus.com/inward/record.url?scp=85024453515&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85024453515&partnerID=8YFLogxK
U2 - 10.1299/kikaic.64.2520
DO - 10.1299/kikaic.64.2520
M3 - Article
AN - SCOPUS:85024453515
VL - 64
SP - 2520
EP - 2527
JO - Nihon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C
JF - Nihon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C
SN - 0387-5024
IS - 623
ER -