Sensorless Unbalance Diagnosis of Affiliated Rotating Chamber Based on Driving Current of Permanent Magnet Synchronous Motor
Sensorless Unbalance Diagnosis of Affiliated Rotating Chamber Based on Driving Current of Permanent Magnet Synchronous Motor
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DOI：
10.1109/tmech.2020.3048378
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发表时间：
2021-12
期刊：
影响因子：
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通讯作者：
Xin Huo;Bo Wang;Shuo Chen;Weishan Chen
中科院分区：
文献类型：
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作者：
Xin Huo;Bo Wang;Shuo Chen;Weishan Chen
不平衡量广泛存在于旋转机电系统中，会引起振动、不稳定等诸多负面影响。提出了一种二自由度精密离心机附属旋转室不平衡诊断的新方法。与目前广泛应用的基于传感器的不平衡诊断方法不同，本文提出的方法研究了控制回路中信号之间的内在联系，包括永磁同步电机的驱动电流、控制回路的扰动信号以及旋转室的不平衡信号。通过不平衡运动学分析，建立了2自由度精密离心机匀速运动和匀加速运动时的运动-机械-电气驱动电流模型。在此基础上，将不平衡量的有效信息包含在驱动电流中。此外，信号分析程序，其中包括域转换和合奏经验模式分解，提出了计算不平衡质量和相位的不平衡。最后通过实验和仿真验证了方法的有效性。
Unbalance exists widely in rotating electromechanical systems, resulting in vibrations, instability, and many other negative influences. In this article, a novel method for unbalance diagnosis of the affiliated rotating chamber in 2-DOF precision centrifuge is proposed. Unlike the widely applied sensor-based unbalance diagnosis methods, the proposed one in this article investigates the internal relationships between signals in the control loop, involving the driving current of the permanent magnet synchronous motor, the disturbance signal of the control loop as well as the unbalance signal of the rotating chamber. By using the unbalance kinematic analysis, two kinematic-mechanical-electric driving current models are established, which are based on the 2-DOF precision centrifuge with uniform motion and uniform acceleration, respectively. Based on the models, the valid information of the unbalance is included in the driving current. Furthermore, a signal analysis procedure, which includes domain conversion and ensemble empirical mode decomposition, is presented to calculate the unbalance mass and the phase of the unbalance. Finally, the effectiveness of methods is validated by experiments and simulations.