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Localized fault detection of gear with servo motor built-in encoder
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Jiawei FAN, Yu GUO, Xingchao YIN, Xiang ZOU, Hongwei WANG
Journal of Vibration Engineering | 2025, 38(4) : 869 - 876
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Journal of Vibration Engineering | 2025, 38(4): 869-876
Localized fault detection of gear with servo motor built-in encoder
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Jiawei FAN, Yu GUO, Xingchao YIN, Xiang ZOU, Hongwei WANG
Affiliations
  • Faculty of Mechanical and Electrical Engineering，Kunming University of Science and Technology，Kunming 650550，China
Published: 2025-04-10 doi: 10.16385/j.cnki.issn.1004-4523.2025.04.022
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Currently，gear fault detection based on vibration，acoustic emission，and other signals requires the installation of additional sensors. This approach faces limitations in terms of sensor placement，high sensor cost，and difficulties in analyzing signals due to modulation effects in gear systems with variable transmission paths，such as planetary gearboxes. A method for diagnosing local gear faults using the built-in encoder of the servo motor is proposed in this paper. Using the output signal of the built-in encoder to extract the feature related to local gear faults. The encoder signal acquisition wiring is drawn from the built-in encoder of the servo motor，and a high-speed counter is used to record the time interval between the rising edges of the angular position pulses of the rotary encoder. The instantaneous angular speed（IAS）signal is calculated，and the IAS signal is analyzed and feature extracted in the angular and order domains to achieve local gear fault detection. Taking the planetary gearbox gear localized fault detection as an example，the proposed method is validated through experiments. Results show that using the built-in encoder of the servo motor can effectively achieve the detection of gear partial faults under low and variable speed conditions. This provides a new approach to fault detection of transmission units such as gearboxes in applications driven by servo motors.

fault detection  /  gear  /  servo motor built-in encoder  /  variable speed condition  /  instantaneous angular speed
Jiawei FAN, Yu GUO, Xingchao YIN, Xiang ZOU, Hongwei WANG. Localized fault detection of gear with servo motor built-in encoder[J]. Journal of Vibration Engineering, 2025 , 38 (4) : 869 -876 . DOI: 10.16385/j.cnki.issn.1004-4523.2025.04.022
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Year 2025 volume 38 Issue 4
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doi: 10.16385/j.cnki.issn.1004-4523.2025.04.022
  • Receive Date：2023-06-15
  • Online Date：2026-02-12
  • Published：2025-04-10
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  • Received：2023-06-15
  • Revised：2023-10-17
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    Faculty of Mechanical and Electrical Engineering，Kunming University of Science and Technology，Kunming 650550，China
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多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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