Suppression of current quantization effects for precise current control of SPMSM using dithering techniques and Kalman filter

Hongzhong Zhu, Hiroshi Fujimoto

研究成果: ジャーナルへの寄稿学術誌査読

25 被引用数 (Scopus)

抄録

High-precision current control is demanded for many mechatronic systems to improve the static and dynamic performances. However, current measurement error inherent in the measurement system degrade the control accuracy, since the motor currents are not guaranteed to follow the desired references. In this paper, quantization error caused by analog-to-digital converters is studied. The dithering techniques combined with Kalman filter are proposed to suppress the quantization effects. First, two dithered systems, including the subtractively dithered and nonsubtractively dithered systems, are designed to whiten the quantization error. In the design of nonsubtractively dithered system, the probability characteristic of the metering noise is utilized to minimize the measurement noise level. Then, Kalman filter is designed to estimate the real current signals from the dithered current measurements. Since the variance of the total measurement error is theoretically calculable according to the proposed dithering techniques, Kalman gain can be determined analytically. Finally, simulations and experiments are performed to verify the effectiveness of the proposed approaches using a high-precision positioning system.

本文言語英語
論文番号6750092
ページ(範囲)1361-1371
ページ数11
ジャーナルIEEE Transactions on Industrial Informatics
10
2
DOI
出版ステータス出版済み - 5月 2014
外部発表はい

!!!All Science Journal Classification (ASJC) codes

  • 制御およびシステム工学
  • 情報システム
  • コンピュータ サイエンスの応用
  • 電子工学および電気工学

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