Stability Analysis of an Ultrasonic Motor for a New Wave Amplitude Control

Giraud, Frédéric; Lemaire‐Semail, Betty; Aragones, J.; Robineau, Jacques; Audren, J.-T.

doi:10.1109/tia.2009.2023395

Cited by 6 publications

(1 citation statement)

References 12 publications

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“…However, adjusting the driving frequency could cause TWUSMs to operate far away from fp in most conditions. Actually, the output characteristics of TWUSMs are directly related to the stator vibration amplitude (SVA) [16,17,18]. Therefore, some researchers use the feedback electrode to detect the SVA and adjust the driving frequency to control the SVA to roughly achieve the target velocity of TWUSMs under constant load conditions [9].…”

Section: Introductionmentioning

confidence: 99%

Velocity Control of Traveling-Wave Ultrasonic Motors Based on Stator Vibration Amplitude

Fang

Yang

Zhu

et al. 2019

Sensors

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Nonlinearity and resonance frequency shift make it difficult to control the operation of the traveling-wave ultrasonic motors (TWUSMs) in a wide velocity and load range. In this paper, a velocity control scheme based on the stator vibration amplitude and the parallel resonance frequency (VCBVF) of TWUSMs is proposed. Then, the stator vibration amplitude (SVA) and parallel resonance frequency (fp) are detected by a transformer ratio-arm bridge. Based on the linear relationship between the velocity and the SVA of TWUSMs, the proposed scheme achieves the control of the mechanical loop and the electrical loop. The linear relationship between the velocity and the SVA makes the mechanical loop achieve the target velocity efficiently, according to the SVA, and the electrical loop could provide the target SVA quickly. Experimental results show that the response time of velocity is 3–4 ms under different load torques and the overshoot is less than 22%. In addition, the proposed scheme improves the efficiency of TWUSMs due to fp tracking. Due to directing the SVA control, the proposed scheme can heighten the velocity response and the load adaptability of TWUSMs, and promote the application of TWUSMs under various conditions.

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