1. A study on sevo-type velocity and displacement sensor for vibration control;Ida,1996
2. Tokyo-Sokushin. Servo type vibration receiver. Japanese Patent Jikkouhei 6-28698; 1994 [in Japanese].
3. Analysis and improvement of velocity sensor;Akiyama,2003
4. Development of velocity sensor with high frequency band using inverse notch filter;Wakui;Trans Jpn Soc Mech Eng,2004
5. Fijitsu. Magnetic head positioning control method and magnetic disk unit. Open Patent H11-12644; 1999 [in Japanese].