Feedforward compensation control of rotor imbalance for high-speed magnetically suspended centrifugal compressors using a novel adaptive notch filter

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• 作者：Shiqiang Zheng ^{zhengshiqiang@buaa.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Rui Feng ; ^{fengruifighting@gmail.com" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Vibration control ; Magnetically suspended centrifugal compressor ; Notch filter ; Feedforward control
• 刊名：Journal of Sound and Vibration
• 出版年：2016
• 出版时间：31 March 2016
• 年：2016
• 卷：366
• 期：Complete
• 页码：1-14
• 全文大小：1057 K

文摘

This paper introduces a feedforward control strategy combined with a novel adaptive notch filter to solve the problem of rotor imbalance in high-speed Magnetically Suspended Centrifugal Compressors (MSCCs). Unbalance vibration force of rotor in MSCC is mainly composed of current stiffness force and displacement stiffness force. In this paper, the mathematical model of the unbalance vibration with the proportional–integral–derivative (PID) control laws is presented. In order to reduce the unbalance vibration, a novel adaptive notch filter is proposed to identify the synchronous frequency displacement of the rotor as a compensation signal to eliminate the current stiffness force. In addition, a feedforward channel from position component to control output is introduced to compensate displacement stiffness force to achieve a better performance. A simplified inverse model of power amplifier is included in the feedforward channel to reject the degrade performance caused by its low-pass characteristic. Simulation and experimental results on a MSCC demonstrate a significant effect on the synchronous vibration suppression of the magnetically suspended rotor at a high speed.