Design of a novel ultrasonic motor achieving both single-mode and multi-mode coupling using parallel symmetrical...

Area of Science:

• Mechanical Engineering
• Materials Science
• Robotics

Background:

• Traditional ultrasonic motors often have limitations in operational flexibility and output characteristics.
• Developing motors with adaptable operating modes is crucial for advanced precision drive applications.

Purpose of the Study:

• To propose and validate a novel ultrasonic motor design capable of both single-mode and multi-mode coupled operation.
• To investigate the performance and feasibility of a dual-vibrator stator structure for enhanced motor capabilities.

Main Methods:

• Design and theoretical analysis of a symmetrical dual-vibrator stator using piezoelectric ceramics in d33 mode.
• Finite element analysis (FEA) for modal, frequency, and transient analysis of the stator.
• Fabrication of a prototype and experimental testing to evaluate output performance.

Main Results:

• The prototype demonstrated a maximum speed of 612 mm/s and a maximum load of 1 kg in multi-mode operation.
• Single-mode operation achieved a maximum speed of 434 mm/s and a maximum load of 0.8 kg.
• The motor achieved a high resolution of 8.1 nm with a compact structure and simple drive mechanism.

Conclusions:

• The proposed dual-vibrator ultrasonic motor design offers flexible switching between single-mode and multi-mode operation.
• The motor exhibits favorable output characteristics and high resolution, making it suitable for precision applications in optics, medical equipment, and aerospace.
• The symmetrical stator design enhances efficiency and ensures consistent bidirectional output.