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Related Experiment Video

Updated: Aug 22, 2025

Experiments on Ultrasonic Lubrication Using a Piezoelectrically-assisted Tribometer and Optical Profilometer
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A Linear Ultrasonic Motor Based on Coupling Vibration Mode.

Danhong Lu1, Hong Liu1, Jianqiao Xu2

  • 1School of Electric Power Engineering, Nanjing Institute of Technology, Nanjing 211167, China.

Micromachines
|November 11, 2022
PubMed
Summary
This summary is machine-generated.

A novel eccentric constraint linear ultrasonic motor (LUSM) was developed, enabling simultaneous dual-slider motion through coupled vibration modes. This design achieved a no-load speed of 45.9 mm/s and a maximum output power of 3.24 mW.

Keywords:
coupling vibration modeeccentric constraintlinear ultrasonic motoroutput characteristics

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Area of Science:

  • Mechatronics
  • Materials Science
  • Robotics

Background:

  • Linear ultrasonic motors (LUSMs) offer precise motion control.
  • Existing LUSM designs often face limitations in simultaneous dual-slider actuation.
  • Eccentric constraints present a potential avenue for novel LUSM functionalities.

Purpose of the Study:

  • To propose and analyze a coupled linear ultrasonic motor (LUSM) utilizing an eccentric constraint.
  • To investigate the generation of coupled vibration modes for simultaneous slider movement.
  • To optimize stator parameters for enhanced driving foot amplitude.

Main Methods:

  • Design of a LUSM with oblique piezoelectric ceramics at elastomer ends.
  • Utilizing piezoelectric ceramic tilting for eccentric restraint and coupled mode generation.
  • Employing ANSYS for stator parameter optimization to maximize X and Z direction amplitudes.
  • Fabrication of a prototype for experimental validation.

Main Results:

  • The proposed LUSM successfully generated coupled vibration modes.
  • Driving feet exhibited oblique straight-line motion trajectories in opposite directions.
  • Optimization resulted in larger amplitudes for driving feet in X and Z directions.
  • Experimental tests yielded a no-load speed of 45.9 mm/s and maximum output power of 3.24 mW.

Conclusions:

  • The eccentric constraint effectively enables coupled modes in LUSMs.
  • The developed LUSM can drive upper and lower sliders simultaneously.
  • The design shows promise for applications requiring precise, coupled linear motion.