自适应干扰抑制策略改善心磁仪信息采集环境

IF 6.4 2区 计算机科学 Q1 AUTOMATION & CONTROL SYSTEMS
Pengtao Tian;Haifeng Zhang;Zhihui Hong;Shiqiang Zheng
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引用次数: 0

摘要

环境中的多频率高幅值磁干扰会对心脏磁心动图设备内心脏磁场信号的检测产生不利影响。自适应多共振控制(AMR)适用于抑制这种干扰,但传感器的时延会影响有源磁场补偿系统(AMC)的稳定性。针对这一问题,本文提出了一种结合比例微分(PD)和线性扩展状态观测器(LESO)的改进型自适应多共振控制器(IAMR)的干扰抑制方法。实验结果表明,PD-LESO-IAMR能在保证系统稳定性的前提下有效抑制多频磁干扰。与传统的PD-LESO相比,MSC的平均磁场干扰从3.73 pT降低到1.80 pT,最大抗干扰能力提高了50.25%。从业人员注意:本文的动机是控制线圈产生的磁场,以减少环境磁场波动对弱磁场信号测量的影响。现有的磁场补偿方法主要集中在线圈的设计上,很少考虑控制方法的优化和改进。因此,环境中特定频率的磁场干扰抑制效果不足。本文提出了一种不受系统时延影响的自适应干扰抑制策略,可以有效抑制高幅值磁干扰。通过应用所提出的控制策略,将磁场波动控制在较小的范围内,提高了磁场测量的精度。未来的工作是将所提出的方法扩展到需要极弱磁场环境的更多应用场景。所提出的控制策略对于解决磁悬浮转子系统的高频不平衡磁拉力,改善永磁同步电机的高频电流抑制,提高原子磁强计对周期性磁场信号的测量精度也具有重要的应用价值。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Improving Information Collection Environment of Magnetocardiography Device Through Adaptive Interference Suppression Strategy
Multiple frequencies high-amplitude magnetic interference in the environment can adversely affect the detection of cardiac magnetic field signals inside magnetocardiography device. Adaptive multi-resonance control (AMR) is suitable for suppressing such interference, but the stability of active magnetic field compensation system (AMC) will be destroyed by the influence of the time delay of the sensor. To address this problem, this paper proposes a interference suppression method that combines an improved adaptive multi-resonance controller (IAMR) with proportional differential (PD) and linear extended state observer (LESO). Experimental results show that PD-LESO-IAMR can effectively suppress multiple frequencies magnetic interference under the premise of ensuring system stability. Compared with conventional PD-LESO, the average magnetic field interference in the MSC can be reduced from 3.73 pT to 1.80 pT, and the maximum anti-interference ability was increased by 50.25%. Note to Practitioners—The motivation of this paper is to control the magnetic field generated by the coil to reduce the influence of environment magnetic field fluctuations on the measurement of weak magnetic field signals. Existing magnetic field compensation methods mainly focus on the design of coils, and rarely consider optimization and improvements in control methods. Therefore, the suppression effect of magnetic field interference at specific frequencies in the environment is insufficient. This paper proposes an adaptive interference suppression strategy that can effectively suppress high-amplitude magnetic interference without being affected by system time delays. By applying the proposed control strategy, the magnetic field fluctuations are kept within a smaller range, improving the accuracy of magnetic field measurement. Future work is to extend the proposed method to more application scenarios that require extremely weak magnetic field environments. The proposed control strategy is also valuable in solving the high-frequency unbalanced magnetic pull of the magnetic levitation rotor system, improving the high-frequency current suppression of the permanent magnet synchronous motor, and improving the measurement accuracy of the atomic magnetometer for periodic magnetic field signals.
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来源期刊
IEEE Transactions on Automation Science and Engineering
IEEE Transactions on Automation Science and Engineering 工程技术-自动化与控制系统
CiteScore
12.50
自引率
14.30%
发文量
404
审稿时长
3.0 months
期刊介绍: The IEEE Transactions on Automation Science and Engineering (T-ASE) publishes fundamental papers on Automation, emphasizing scientific results that advance efficiency, quality, productivity, and reliability. T-ASE encourages interdisciplinary approaches from computer science, control systems, electrical engineering, mathematics, mechanical engineering, operations research, and other fields. T-ASE welcomes results relevant to industries such as agriculture, biotechnology, healthcare, home automation, maintenance, manufacturing, pharmaceuticals, retail, security, service, supply chains, and transportation. T-ASE addresses a research community willing to integrate knowledge across disciplines and industries. For this purpose, each paper includes a Note to Practitioners that summarizes how its results can be applied or how they might be extended to apply in practice.
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