基于马氏距离的二次电源状态判析方法

Approach of state determination for secondary electrical power source based on Mahalanobis distance

为了对二次电源的状态进行诊断,提出了一种采用马氏距离(MD)建立健康阈值的方法。该方法通过计算电源输出电压的MD值,建立健康阈值,并利用健康阈值构建控制图。通过统计样本的MD值在控制图中的分布情况,确定电源的健康状态。实验结果表明:利用MD建立健康阈值能够有效地判断二次电源的状态。对实现二次电源的状态监测和故障诊断有重要意义。

In order to diagnose state of secondary electrical power source,a method using the Mahalanobis distance（ MD） to establish healthy threshold is proposed. By calculating MD of power supply output voltage,healthy threshold is established,and control chart is constructed. Through distribution of MD of statistical samples in control chart,to confirm healthy state of power. Experimental results show that using MD to establish healthy threshold can effectively diagnose state of secondary electrical power supply. It has important significance for monitoring condition and fault diagnosing of secondary electrical power supply.