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A Method for Evaluating Timeliness and Accuracy of Volitional Motor Responses to Vibrotactile Stimuli
Published on: August 2, 2016
A vibrators alternation stepping ultrasonic motor
1Research Center of Ultrasonic Motors, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China. jjm345@sohu.com <jjm345@sohu.com>
Ultrasonics
|August 4, 2006
Summary
A novel ultrasonic motor utilizes vibrator alternation stepping for precise, bidirectional movement without cumulative error. This innovative design achieves a 1.44-degree step angle and notable speed and torque performance.
Area of Science:
- Mechanical Engineering
- Materials Science
- Robotics
Background:
- Ultrasonic motors offer high precision and compact designs.
- Traditional designs can suffer from cumulative errors and limited directional control.
- Langevin resonators are effective piezoelectric transducers.
Purpose of the Study:
- To introduce a new vibrator alternation stepping ultrasonic motor concept.
- To achieve bidirectional step displacements without cumulative error.
- To characterize the motor's performance in terms of step angle, speed, and torque.
Main Methods:
- Utilizing longitudinal vibrations of rectangular Langevin resonators.
- Employing a single-phase power source without feedback control.
- Integrating 150 grooves on the rotor for positioning.
Main Results:
- The motor demonstrated bidirectional step displacements with no cumulative error.
- Achieved a precise step angle of 1.44 degrees.
- Exhibited an average no-load rotation speed of 16.49-14.65 rad/s and braking torque of 0.071-0.088 Nm at 30 kHz and 200 V.
Conclusions:
- The proposed vibrator alternation stepping ultrasonic motor is a viable solution for high-precision positioning.
- The design eliminates cumulative displacement errors, enhancing reliability.
- The motor shows promising performance characteristics for various applications.
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