TY - GEN
T1 - Enhanced Active Magnetic Shielding Based on High-order Extended State Observer
AU - Shi, Ziyang
AU - Zheng, Shiqiang
AU - Zhang, Haifeng
AU - Li, Yuxuan
AU - Tang, Zheng
AU - Lian, Yunyang
N1 - Publisher Copyright:
© 2025 IEEE.
PY - 2025
Y1 - 2025
N2 - Active magnetic shielding (AMS) plays a pivotal role in enabling ultra-weak magnetic field measurements. However, existing techniques often fall short when confronted with complex and time-varying magnetic disturbances. In this work, we propose an enhanced AMS approach based on a high-order extended state observer (HESO), designed to address these limitations. First, a precise dynamic model of the AMS system is established. Next, both the conventional linear extended state observer (LESO) and the proposed HESO are developed. To optimize the performance of HESO, two tuning strategies are investigated: a bandwidth-based method and a Chebyshev filter-based method that improves frequency selectivity and noise suppression. Finally, extensive simulation and experimental results confirm that the proposed HESO-based AMS framework significantly improves disturbance rejection in the presence of time-varying magnetic interference, offering a more robust solution for high-precision magnetically shielded environments.
AB - Active magnetic shielding (AMS) plays a pivotal role in enabling ultra-weak magnetic field measurements. However, existing techniques often fall short when confronted with complex and time-varying magnetic disturbances. In this work, we propose an enhanced AMS approach based on a high-order extended state observer (HESO), designed to address these limitations. First, a precise dynamic model of the AMS system is established. Next, both the conventional linear extended state observer (LESO) and the proposed HESO are developed. To optimize the performance of HESO, two tuning strategies are investigated: a bandwidth-based method and a Chebyshev filter-based method that improves frequency selectivity and noise suppression. Finally, extensive simulation and experimental results confirm that the proposed HESO-based AMS framework significantly improves disturbance rejection in the presence of time-varying magnetic interference, offering a more robust solution for high-precision magnetically shielded environments.
KW - Active magnetic shielding
KW - chebyshev filter
KW - disturbance rejection
KW - extended state observer
KW - noise suppression
UR - https://www.scopus.com/pages/publications/105024658518
U2 - 10.1109/IECON58223.2025.11221271
DO - 10.1109/IECON58223.2025.11221271
M3 - 会议稿件
AN - SCOPUS:105024658518
T3 - IECON Proceedings (Industrial Electronics Conference)
BT - IECON 2025 - 51st Annual Conference of the IEEE Industrial Electronics Society
PB - IEEE Computer Society
T2 - 51st Annual Conference of the IEEE Industrial Electronics Society, IECON 2025
Y2 - 14 October 2025 through 17 October 2025
ER -