{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,28]],"date-time":"2026-02-28T23:26:33Z","timestamp":1772321193762,"version":"3.50.1"},"reference-count":34,"publisher":"MDPI AG","issue":"7","license":[{"start":{"date-parts":[[2018,7,7]],"date-time":"2018-07-07T00:00:00Z","timestamp":1530921600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["51775157"],"award-info":[{"award-number":["51775157"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>This paper presents a novel impact rotary motor based on a piezoelectric tube actuator with helical interdigitated electrodes which has a compact structure and high resolution. The assembled prototype motor has a maximum diameter of 15 mm and a length of 65 mm and works under a saw-shaped driving voltage. The LuGre friction model is adopted to analyze the rotary motion process of the motor in the dynamic simulations. From the experimental tests, the first torsional resonant frequency of the piezoelectric tube is 59.289 kHz with a free boundary condition. A series of experiments about the stepping characteristics of different driving voltages, duty cycles, and working frequencies are carried out by a laser Doppler vibrometer based on a fabricated prototype motor. The experimental results show that the prototype rotary motor can produce a maximum torsional angle of about 0.03\u00b0 using a driving voltage of 480 Vp-p (peak-to-peak driving voltage) with a duty ratio of 0% under a small friction force of about 0.1 N. The motor can produce a maximum average angle of about 2.55 rad\/s and a stall torque of 0.4 mN\u2219m at 8 kHz using a driving voltage of 640 Vp-p with a duty ratio of 0% under a large friction force of about 3.6 N. The prototype can be driven in forward and backward motion and is working in stick-slip mode at low frequencies and slip-slip mode at high frequencies.<\/jats:p>","DOI":"10.3390\/s18072195","type":"journal-article","created":{"date-parts":[[2018,7,9]],"date-time":"2018-07-09T11:18:53Z","timestamp":1531135133000},"page":"2195","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":14,"title":["A Compact Impact Rotary Motor Based on a Piezoelectric Tube Actuator with Helical Interdigitated Electrodes"],"prefix":"10.3390","volume":"18","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-5393-593X","authenticated-orcid":false,"given":"Liling","family":"Han","sequence":"first","affiliation":[{"name":"School of Instrument Science and Opto-electronics Engineering, Hefei University of Technology, Hefei 230009, China"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1305-4003","authenticated-orcid":false,"given":"Huining","family":"Zhao","sequence":"additional","affiliation":[{"name":"School of Instrument Science and Opto-electronics Engineering, Hefei University of Technology, Hefei 230009, China"}]},{"given":"Haojie","family":"Xia","sequence":"additional","affiliation":[{"name":"School of Instrument Science and Opto-electronics Engineering, Hefei University of Technology, Hefei 230009, China"}]},{"given":"Chengliang","family":"Pan","sequence":"additional","affiliation":[{"name":"School of Instrument Science and Opto-electronics Engineering, Hefei University of Technology, Hefei 230009, China"}]},{"given":"Yizhou","family":"Jiang","sequence":"additional","affiliation":[{"name":"School of Instrument Science and Opto-electronics Engineering, Hefei University of Technology, Hefei 230009, China"}]},{"given":"Weishi","family":"Li","sequence":"additional","affiliation":[{"name":"School of Instrument Science and Opto-electronics Engineering, Hefei University of Technology, Hefei 230009, China"}]},{"given":"Liandong","family":"Yu","sequence":"additional","affiliation":[{"name":"School of Instrument Science and Opto-electronics Engineering, Hefei University of Technology, Hefei 230009, China"}]}],"member":"1968","published-online":{"date-parts":[[2018,7,7]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Li, J., Hu, G., Zhou, Y., Zou, C., Peng, W., and Alam, J.S. 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