Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
권호 표지
DOI QR코드

DOI QR Code

Improvement in Control Performance of a Servo System Compensating Bandwidth Variations at Low Speed

  • Ji, Young-Eun (Dept. of Automation & Control Research, Hyundai Heavy Industries) ;
  • Park, Je-Wook (School of Electrical Eng., Pusan National University) ;
  • Hwang, Seon-Hwan (School of Electrical Eng., Pusan National University) ;
  • Baek, Kwang-Ryul (School of Electrical Eng., Pusan National University) ;
  • Kim, Jang-Mok (School of Electrical Eng., Pusan National University)
  • Received : 2009.12.24
  • Published : 2010.07.20
Download PDF
⟨ Previous Next ⟩

Abstract

This paper presents a novel design method for determining the PID gains of a speed controller for a servo system compensating variations in bandwidth at a low speed. The variations in bandwidth of a speed controller are measured at a low speed and the relationship between the bandwidth and the damping ratio are verified by determining the location of the closed loop pole. The proposed algorithm uses the z-transform of a plant and speed controller and applies the time-varying sampling method for determining the PID gains of the speed controller at low speed. The magnitude and the phase condition are considered for finding a suitable control gain. The usefulness and effectiveness of the proposed method is demonstrated through experimental results such as low speed control and robust disturbance responses.

Keywords

References

  1. Gaolin Wang, "Low speed control of permanent magnet synchronous motor based on instantaneous speed estimation," Proceedings of the 6th world congress on intelligent control and automation, Vol.2, pp.8033- 9036, 2006.
  2. Kung, Ying-Shieh, Huang, "High performance position controller for PMSM drives based on TMS320F2812 DSP," Proceedings of the IEEE International Conference on Control Applications, Vol. 1, pp. 290-295, 15-18 Aug., 2004.
  3. Kyo-Beum Lee, "Disturbance observer that uses radial basis function networks for the low speed control of a servo motor," IEE Proc.-Control Theory Appl., Vol.152, No.2, pp. 268-273, Mar. 2005.
  4. Heui-Wook Kim, Seung-Ki Sul, "A new motor speed estimator using kalman filter in low speed range," IEEE Trans. on Industrial Applications, Vol.43, No.4, pp.498-504, 1996.
  5. Yucheng Bai, Xiaogi Tang, Jihong Chen, Fangyu Peng, "Research on Ultra-low speed control of PMSM in servo system," Proceedings of the IEEE Intelligent Control and Automation, pp.2381-2386, 2008.
  6. Kichul Hong, "A Disturbance Torque Compensation Scheme Considering the Speed Measurement Delay," Proceedings of the IEEE Industry Applications Conference, Vol.1, pp.403-409, 1996.