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A four-legged linear ultrasonic motor: Design and experiments
Ruikun Niu1, Hua Zhu1, Chunsheng Zhao1
1State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China.
The Review of Scientific Instruments
|August 6, 2020
Summary
A novel four-legged linear ultrasonic motor utilizes combined vibration modes for efficient linear motion. This innovative design achieves high speed and thrust, promising applications in precision systems.
Area of Science:
- Mechanical Engineering
- Materials Science
- Robotics
Background:
- Traditional linear motors face limitations in precision and efficiency.
- Ultrasonic motors offer advantages in miniaturization and high-resolution positioning.
Purpose of the Study:
- To design and develop a novel four-legged linear ultrasonic motor.
- To investigate the performance characteristics of the new motor design.
Main Methods:
- The motor design integrates in-plane longitudinal and out-of-plane anti-symmetric vibration modes.
- A stator composed of piezoelectric ceramic sheets is excited by a two-phase high voltage signal.
- The superposition of vibrations generates elliptical motion at the driving feet for linear translation.
Main Results:
- An experimental prototype (600 × 160 mm) was fabricated and tested.
- At a 200 V driving voltage, a maximum translational speed of 135 mm/s was achieved.
- A maximum thrust of 3.6 N was recorded, demonstrating significant output capability.
Conclusions:
- The four-legged linear ultrasonic motor exhibits a simple structure and high output efficiency.
- The motor's performance indicates strong potential for precision systems and industrial automation.
- Further research can explore optimization for enhanced performance and broader applications.
