TY - GEN
T1 - Resonance suppression strategy for blade rotor/AMB unit of composite TMP
AU - Tsai, Nan Chyuan
AU - Chiu, Hsin Lin
PY - 2017/8/21
Y1 - 2017/8/21
N2 - A novel design of Composite Turbo-Molecular Pump (CTMP) is proposed. The major configuration of CTMP is composed by a coarse pump, a Turbo-Molecular Pump (TMP) and a Magnetic Gear Unit (MGU) capable of speed amplification. The corresponding modal analysis and the study on rotor/bearing dynamics are undertaken at first to estimate the resonance frequencies of the TMP blade rotor itself solely and the interactive dynamics of Blade Rotor/Radial Active Magnetic Bearing (BR/RAMB) subsystem. Secondly, an appropriate interval of stiffness provided and tuned by the RAMB is presented to make the TMP blade rotor able to actively retain speed margin at least 10% away from the resonance frequencies of the closed-loop control system. Thirdly, an economical and efficient method by adjusting the angular acceleration speed of BR, namely Resonance-Driven Prevention Strategy (RDPS), is proposed to avoid the undesired excitation at resonance frequencies of BR/RAMB system and potential instability. Finally, by intensive computer simulations, the proposed RDPS indeed manifests its outstanding performance to efficiently skip or bypass the natural frequencies of the closed-loop system within a very short time period and guarantee, to a certain extent, the system stability.
AB - A novel design of Composite Turbo-Molecular Pump (CTMP) is proposed. The major configuration of CTMP is composed by a coarse pump, a Turbo-Molecular Pump (TMP) and a Magnetic Gear Unit (MGU) capable of speed amplification. The corresponding modal analysis and the study on rotor/bearing dynamics are undertaken at first to estimate the resonance frequencies of the TMP blade rotor itself solely and the interactive dynamics of Blade Rotor/Radial Active Magnetic Bearing (BR/RAMB) subsystem. Secondly, an appropriate interval of stiffness provided and tuned by the RAMB is presented to make the TMP blade rotor able to actively retain speed margin at least 10% away from the resonance frequencies of the closed-loop control system. Thirdly, an economical and efficient method by adjusting the angular acceleration speed of BR, namely Resonance-Driven Prevention Strategy (RDPS), is proposed to avoid the undesired excitation at resonance frequencies of BR/RAMB system and potential instability. Finally, by intensive computer simulations, the proposed RDPS indeed manifests its outstanding performance to efficiently skip or bypass the natural frequencies of the closed-loop system within a very short time period and guarantee, to a certain extent, the system stability.
UR - http://www.scopus.com/inward/record.url?scp=85028768254&partnerID=8YFLogxK
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U2 - 10.1109/AIM.2017.8014261
DO - 10.1109/AIM.2017.8014261
M3 - Conference contribution
AN - SCOPUS:85028768254
T3 - IEEE/ASME International Conference on Advanced Intelligent Mechatronics, AIM
SP - 1688
EP - 1693
BT - 2017 IEEE International Conference on Advanced Intelligent Mechatronics, AIM 2017
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2017 IEEE International Conference on Advanced Intelligent Mechatronics, AIM 2017
Y2 - 3 July 2017 through 7 July 2017
ER -