Modeling and analysis of an AMB system with flexible rotor in HTR-10GT - 18550

Conference · Tue Nov 15 04:00:00 EST 2016

OSTI ID:23032686

HE, Ying; SUN, Zhe; SHI, Zhengang; SHI, Lei; Zhou, Yan; Liu, Xingnan; Yan, Xunshi ^[1]

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1. Institute of Nuclear and New Energy Technology of Tsinghua University, Collaborative Innovation Center of Advanced Nuclear Energy Technology, Key laboratory of advanced reactor engineering and safety of Ministry of Education, Tsinghua University, Beijing, 100084, PR China (China)

Active magnetic bearing (AMB) has been widely used in high-temperature gas-cooled reactor (HTR) for its specific properties: free of contact, absence of lubrication, capability of rotating at high speed. AMB system is inherently unstable since positive feedback exists in the open loop system and, thus, requires feedback control. From the control view of point, accurate system model is essential for designing of an effective controller especially when the flexible gyroscopic rotor is involved. In the paper, a flexible rotor and an open-loop AMB system model were established for the purpose of controller design. Dynamic characteristics of the undamped flexible rotor are analyzed including modal vibration analysis and undamped natural frequencies. Additionally, some characteristics of open-loop AMB system are investigated such as relationship between support stiffness and natural frequencies, and the system frequency response. The analysis results in this paper will provide valuable information for AMB system feedback controller design. (authors)

• Research Organization: American Nuclear Society - ANS, 555 North Kensington Avenue, La Grange Park, IL 60526 (United States)
• OSTI ID: 23032686
• Country of Publication: United States
• Language: English

Related Subjects

21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
42 ENGINEERING
COMPUTERIZED SIMULATION
DESIGN
FLEXIBILITY
HTGR TYPE REACTORS
LUBRICATION
MAGNETIC BEARINGS
ROTORS
VELOCITY