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Journal of Zhejiang University SCIENCE C 1998 Vol.-1 No.-1 P.

http://doi.org/10.1631/FITEE.2300031


Vibration harmonic suppression technology for electromagnetic vibrators based on an improved sensorless feedback control method


Author(s):  Wei Li, Junning Cui, Xingyuan Bian, Limin Zou

Affiliation(s):  Center of Ultra-precision Optoelectronic Instrument Engineering, Harbin Institute of Technology, Harbin 150080, China; more

Corresponding email(s):   cuijunning@hit.edu.cn

Key Words:  Vibration calibration, Electromagnetic vibrators, Harmonic suppression, Sensorless control method, Velocity feedback control


Wei Li, Junning Cui, Xingyuan Bian, Limin Zou. Vibration harmonic suppression technology for electromagnetic vibrators based on an improved sensorless feedback control method[J]. Frontiers of Information Technology & Electronic Engineering, 1998, -1(-1): .

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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 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. In this paper 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 to 1 Hz, without using any sensors, the method proposed in this paper 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.

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