Abstract

To realize low harmonic distortion of the vibration waveform output from electromagnetic vibrators, we propose a vibration harmonic suppression technology based on an improved sensorless feedback control method. Without changing the original driving circuit, the alternating current (AC) equivalent resistance of the driving coil is used to obtain high-precision vibration velocity information, and then a simple and reliable velocity feedback control system is established. Through the study of the effect of different values of key parameters on the system, we have achieved an effective expansion of the velocity characteristic frequency band of low-frequency vibration, resulting in an enhanced harmonic suppression capability of velocity feedback control. We present extensive experiments to prove the effectiveness of the proposed method and make comparisons with conventional control methods. In the frequency range of 0.01–1.00 Hz, without using any sensors, the method proposed in this study can reduce the harmonic distortion of the vibration waveform by about 40% compared to open-loop control and by about 20% compared to a conventional sensorless feedback control method.

中文翻译：

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基于改进无传感器反馈控制方法的电磁振动器振动谐波抑制技术

摘要

为了实现电磁振动器输出的振动波形的低谐波失真，我们提出了一种基于改进的无传感器反馈控制方法的振动谐波抑制技术。在不改变原有驱动电路的情况下，利用驱动线圈的交流等效电阻来获取高精度的振动速度信息，进而建立简单可靠的速度反馈控制系统。通过研究不同关键参数取值对系统的影响，实现了低频振动速度特征频带的有效扩展，从而增强了速度反馈控制的谐波抑制能力。我们进行了大量的实验来证明该方法的有效性，并与传统的控制方法进行比较。在0.01~1.00 Hz的频率范围内，在不使用任何传感器的情况下，本研究提出的方法与开环控制相比可以减少振动波形的谐波失真约40%，与传统无传感器相比可以减少约20%反馈控制方法。