3Pan M C, Li P C, Cheng Y R. Remote online machine condition monitoring system [ J ]. Measurement, 2008 (41) :912 -921.
4Tamas Szecsi. A DC motor based cutting tool condition monitoring system [ J ]. Journal of Materials Processing Technology, 1999,92 - 93 ( 8 ) :350 - 354.
5Hajiaghajani M, Toliyat H A, Panahi I M S. Advanced fault diagnosis of a DC motor [ J ]. Energy Conversion, 2004,19(1) :60 -65.