“In the field of electromagnetic vibration, researchers have proposed a vibration harmonic suppression technology based on an improved sensorless feedback control method. By using the AC equivalent resistance of the driving coil to obtain high-precision vibration velocity information, a simple and reliable velocity feedback control system is established. Extensive experiments have proven the effectiveness of the proposed method, which 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.”