原子干涉磁力仪信号鉴频优化算法设计  

Frequency Discrimination Optimization Algorithm Design for Atomic Interference Magnetometer

作　　者：张笑楠[1,2] 孙晓洁[2] 寇军[2] 魏宗康[2] 任章[1] 

机构地区：[1]北京航空航天大学自动化科学与电气工程学院,北京100191 [2]北京航天控制仪器研究所,北京100039

出　　处：《湖南师范大学自然科学学报》2017年第1期71-76,共6页Journal of Natural Science of Hunan Normal University

基　　金：国家自然科学基金资助项目(11204011)

摘　　要：原子干涉磁力仪是通过确定CPT鉴频信号曲线峰值所对应的频率值来计算磁场强度值的.信号峰值定位锁定算法的搜索速度、准确度和稳定性直接影响磁力仪的分辨率和响应速度.常见的斜率算法只适用于小步长的搜索,定位速度慢,锁定状态的稳定性差.针对此问题,通过建立磁力仪鉴频信号曲线数学模型,设计了PI跟踪控制算法和快速锁定算法两种优化算法,并经仿真实验对比了性能.研究结果表明:3种算法中快速锁定算法不仅受初始搜索步长的影响小,而且峰值定位速度最快,稳定性好,对于原子干涉磁力仪系统的性能提高有很大的应用价值.Atomic interference magnetometer is able to calculate the value of the magnetic field strength by collecting the CPT frequency discrimination signal curve peak which corresponding to the frequency value though the light quantum sensor. The resolution and response speed of magnetometer are directly affected by the search speed,accuracy and stability of signal peak positioning and locking algorithm. Slope algorithm is widely used in magnetometer system and only suitable for small step length search with slow location speed and low stability of the locked state. In order to improve the algorithm,two kinds of optimization algorithms are designed based on the mathematical model of magnetometer signal,which are PI tracking control algorithm and fast locking algorithm.Simulation experiments are also conducted to compare the performance of the three algorithms. The results show that the fast locking algorithm is nearly not affected by the initial search step size,which also has the fastest peak position speed,and good locking stability. It is of great application potential for the performance improvement of atomic interference magnetometer system.

关 键 词：原子干涉磁力仪 CPT鉴频信号曲线 峰值定位锁定 优化算法 

分 类 号：U652[交通运输工程—港口、海岸及近海工程]