动态光散射检测电机转速的互信息函数分析

Analysis on the mutual information function for testing the electrical machinery's rotational speed by dynamic light scattering method

通过计算互信息函数,对动态光散射得到的电机转速的时间序列进行了分析。研究表明,互信息函数法能准确地测出电机转速。同时,由于互信息函数自身的优点———能实际地反映出数据之间的相互关联,因此,与自相关函数法比较,互信息函数法可反映出更多的动力学信息。对实验数据的时间序列作了二维的相空间重构,从重构图形发现系统有2周期行为,并呈现有一些新现象。

The mutual information function was adapted to develop the experiment of testing the rotational speed of the electrical machinery by the photon correlation technique and picked up the rotational speed＇ s information of the electrical machinery. It indicated that the mutual information function is applicable to the experiment of testing the electrical machinery by the photon correlation technique as same as the autocorrelation function. At the same time, because of the advantage of the mutual infomation function, it could actually reflect the mutual correlation of the data and paid more attention to the details. So it could reflect a lot of dynamics＇ subtle information. Phase spatial reconstruction of the time series to the data of the experiment was adapted and about the significance was discussed.