| 摘要 |
PROBLEM TO BE SOLVED: To provide a telemetry data analyzer sensing a motion suspected to be abnormal based on a chaotic dynamical system from telemetry data of a flying object. SOLUTION: A telemetry data analyzer of a flying object with variable structure includes: a data segmenting part segmenting a time-series data group from the telemetry data group of the flying object; a data preprocessing part calculating an embedding dimension of time-series data group; a surrogate data generating part generating RS and Ft surrogate data groups from the time-series data group; a non-linear statistic amount estimating part estimating a non-linear statistic amount from the time-series data group and the RS and FT surrogate data groups; a data detecting part performing significant test for the non-linear statistic amount and determining whether or not the time-series data group is chaotic; an abnormality possibility detecting part, detecting the motion of the flying object suspected to be abnormal from a difference between the non-linear statistic amount of the time-series data group determined to be chaotic, and the non-linear statistic amount of the past time-series data group; and a control part making the data preprocessing part calculate the embedding dimension of the time-series data group every time the structure of the flying object is changed. COPYRIGHT: (C)2011,JPO&INPIT |
