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对地球变化磁场进行了混沌动力学特性分析,主要进行了以下两个方面的工作:1)运用多种方法对多个地磁台站同一时段变化磁场分量数据(分为磁扰较小和磁扰较大时段)进行了混沌特性分析,主要是为了以更充分的判据来验证地球变化磁场是否具有混沌特性;2)同一地磁台站不同时段变化磁场分量数据的混沌特性分析,主要是验证地球变化磁场是否具有变参数混沌特性.分析结果表明:1)变化磁场时间序列确实具有混沌特性;2)从混沌时间序列相空间重构的角度可初步认为模拟地球变化磁场动力学系统所必须的独立变量应该为6左右;3)变化磁场时间序列不仅具有混沌特性而且其参数也是在缓慢变化着的,具有变参数混沌系统的特性.
The chaotic dynamic characteristics of the Earth’s changing magnetic field are analyzed, mainly in the following two aspects: 1) The use of a variety of methods for magnetic field component data of multiple geomagnetic stations at the same time period (divided into small magnetic disturbance and magnetic disturbance Large period of time) chaotic characteristics of the analysis, mainly in order to verify a more sufficient criterion of the Earth’s magnetic field changes have chaotic characteristics; 2) at the same geomagnetic station changes in different periods of magnetic field component data chaos characteristics, mainly to verify the Earth The results show that: 1) the changing magnetic field time series does have chaos characteristic; 2) From the view of phase space reconstruction of chaotic time series, it can be preliminarily considered that the necessary independence The variable should be about 6; 3) The changing magnetic field time series not only has the chaotic characteristic but also its parameter changes slowly, which has the characteristics of variable parameter chaotic system.