High-performance load-adaptive speed control for ultrasonic motors
| Autor: | Patrice Minotti, Antoine Ferreira |
|---|---|
| Rok vydání: | 1998 |
| Předmět: |
Electronic speed control
Engineering Adaptive control business.industry Applied Mathematics Automatic frequency control Motor control Control engineering Computer Science Applications Control and Systems Engineering Control theory Ultrasonic motor Point (geometry) Electrical and Electronic Engineering Actuator business Pulse-width modulation |
| Zdroj: | Control Engineering Practice. 6:1-13 |
| ISSN: | 0967-0661 |
| DOI: | 10.1016/s0967-0661(97)10057-0 |
| Popis: | High-performance servo-control schemes using ultrasonic motors (USMs) as new actuators have not yet been applied in practice in modern industry and office-automation systems, because the dynamic and steady-state modelling of USMs is extremely difficult from the theoretical point of view. In the first part of this paper, the rotational speed-control characteristics of a circular travelling wave motor are theoretically analysed and experimentally explored by using an experimental measuring system. In the second part, a newly-developed servo-control system using two feedback control loops based on a sensorless technique is described. This technique, using strategies for both instantaneous control and average value control, is based upon control of both the load-adaptive resonant frequency and a constant velocity. These control schemes are considered theoretically, and experimental results are demonstrated and evaluated in practice. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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