电磁屏蔽
护盾
噪音(视频)
补偿(心理学)
职位(财务)
磁场
壳体(结构)
声学
控制器(灌溉)
材料科学
物理
核磁共振
控制理论(社会学)
计算机科学
控制(管理)
复合材料
岩石学
心理学
图像(数学)
财务
量子力学
人工智能
精神分析
农学
经济
生物
地质学
作者
Abdelmomen Mahgoub,I. Sasada
标识
DOI:10.1109/tmag.2013.2291892
摘要
A new strategy using two independent controllers to cancel both static and time varying magnetic fields is introduced. Two sets of coils are utilized for active compensation in the y-direction. The system shielding efficiency improved to 800 at 30 Hz from 20 in the case of passive shield only. The performance of the shield is further investigated by optimally selecting the relative position between the feedback and measuring sensors. Also, the distribution of y-component of magnetic field inside the shell along x-direction under different shell separation is investigated. The results show that the new controller was able to reduce the noise at 1 Hz to 20 pT/√ Hz, and the noise at 60 Hz is reduced more than 100×, with a noise floor of 3 pT/√ Hz.
科研通智能强力驱动
Strongly Powered by AbleSci AI