Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Speed Sensorless Control of Ultrasonic Motors Using Neural Network

  • Yoshida Tomohiro (Dept. of Electrical and Electronics Eng., The University of the Ryukyus) ;
  • Senjyu Tomonobu (Dept. of Electrical and Electronics Eng., The University of the Ryukyus) ;
  • Nakamura Mitsuru (Dept. of Electrical and Electronics Eng., The University of the Ryukyus) ;
  • Urasaki Naomitsu (Dept. of Electrical and Electronics Eng., The University of the Ryukyus) ;
  • Funabashi Toshihisa (Power System Engineering Division, Meidensha Corporation) ;
  • Sekine Hideomi (Dept. of Electrical and Electronics Eng., The University of the Ryukyus)
  • Published : 2006.01.01
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Abstract

In this paper, a speed sensorless control for an ultrasonic motor (USM) using a neural network (NN) is presented. In the proposed method, rotor speed is estimated by a three-layer NN which adapts nonlinearities associated with load torque and motor temperature into control. The intrinsic properties of a USM, such as high torque for low speeds, high static torque, compact size, etc., offer great advantages for industrial applications. However, the speed property of a USM has strong nonlinear properties associated with motor temperature and load torque, which make accurate speed control difficult. These properties are considered in designing a control method through the application of mathematical models. In these strategies, a detailed speed model of the USM is required which makes actual applications impractical. In the proposed method, a three-layer NN estimates the speed of the USM from the drive frequency, the root mean square value of input voltage and the surface temperature of the USM, where no mechanical speed sensor is needed. The NN speed based estimator enables inclusion of variations in driving conditions due to input signals of the NN involved during the driving state of the USM. The disuse of sensors offers many advantages on both the cost and maintenance front. Moreover, the model free sensorless control method offers practical controller construction within a small number of parameters. To validate the proposed speed sensorless control method for a USM, experiments have been executed under several conditions.

Keywords

References

  1. Takashi Kenjyo and Toshio Sashida, 'An Introduction of Ultrasonic Motor', Oxford Science Publications, 1993
  2. E Cerruto, A Consoli, A Raciti, and A Testa, 'Modeling of a piezoelectric rotary ultrasonic motor', IEEE Trans. Ultrason., Freq. Contr., Vol. 42, No. 2, pp. 210-224, 1995 https://doi.org/10.1109/58.365235
  3. Y. Ming and O. Peiwen, 'Performances estimation of a rotary traveling wave ultrasonic motor based on two-dimension analytical model', Ultrasonics 39, pp. 115-120, 2001 https://doi.org/10.1016/S0041-624X(00)00053-6
  4. MS Tsai, CH Lee, and SH Hwang, 'Dynamic modeling and analysis of a bimodal ultrasonic motor', IEEE Trans. Ultrason., Freq. Contr., Vol. 50, No. 3, pp. 245-256, 2003 https://doi.org/10.1109/TUFFC.2003.1193618
  5. D. Sun, J. Liu and X. Ai, 'Modeling and performance evaluation of travelling-wave piezoelectric ultrasonic motors with analytical method', Sens. Actuators A 100, pp. 84-93, 2002 https://doi.org/10.1016/S0924-4247(02)00151-6
  6. T. Senjyu, T. Kashiwagi, and K. Uezato, 'Position control of ultrasonic motors using MRAC and dead-zone compensation with fuzzy inference', IEEE Trans. Power Electron., Vol. 17, No. 2, pp. 265-272, 2002 https://doi.org/10.1109/63.988945
  7. FJ Lin, 'Fuzzy daaptive model-following position control for ultrasonic motor', IEEE Trans. Power Electron., Vol. 12, No. 2, pp. 261-268, 1997 https://doi.org/10.1109/TIA.1976.349420
  8. T. Senjyu, S. Yokoda, H. Miyazato, and K. Uezato, 'Speed control of ultrasonic motors by adaptive control with a simplified mathematical model', IEE Procces-Electric Power Appl., Vol. 145, No. 3, pp. 180-184, 1998 https://doi.org/10.1049/ip-epa:19981376
  9. Seong-Hwan Kim, Tae-Sik Park, Ji-Yoon Yoo, and Gwi-Tae Park, 'Speed-Sensorless Vector Control of an Induction Motor Using Neural Network Speed Estimation', IEEE Trans. Indust. Electron., Vol. 48, No. 3, pp. 609-614, 2001 https://doi.org/10.1109/41.925588
  10. T. Senjyu, H. Miyazato, S. Yokoda and K. Uezato, 'Position Control of Ultrasonic Motors Using Neural Network', IEEE International Symposium on Industrial Electron (ISIE'96), pp. 254-259, June 17-20 1996
  11. Y. Izuno, T. Izumi, H. Yasutsune, E. Hiraki, and M. Nakao 'Speed Tracking Servo Control System Incorporating Traveling-Wave-Type Ultrasonic Motor and Feasible Evaluations', IEEE Trans. Industry Appl. , Vol. 34, o. 1, pp. 126-132, 1998 https://doi.org/10.1109/28.658734
  12. T. Izumi, H. Yasutsune, Y. Ju Kim, and M. Nakaoka, 'New Inverter-Fed Power Ultrasonic Motor for Speed Tracking Servo Application and Its Feasible Evaluations', Proceedings of International Conference on Power Electronics and Drive Systems, Vol. 2, pp. 766-773, 1995