TY - JOUR
T1 - Collision prevention of eccentric proof mass applied for micro-gyroscope
AU - Tsai, Nan-Chyuan
AU - Liou, Jiun Sheng
AU - Lin, Chih Che
AU - Li, Tuan
PY - 2011/1/1
Y1 - 2011/1/1
N2 - An innovative 3-phase AC (Alternative Current) drive circuit for the seismic disc in micro-gyroscopes is designed and verified by computer simulations and experiments. The in-plane dynamic model of the seismic disc with mass eccentricity and air gap against the centre bearing and the mathematic expression of two sinusoidal magnetic fields are developed respectively. In order to prevent the seismic disc from collision with the centre bearing and the EM (Electromagnetic) poles, an anti-collision controller is established by employing two Look-up tables which define the intensity of the applied current to the EM poles. Self-sensing technique is included to measure the real-time offset and angular position deviation (i.e., precession) of the disc by two orthogonal pairs of EM poles, without any additional sensors. The drive circuit under SPWM (Sinusoidal Pulse Width Modulation) operation and the anti-collision strategy are verified by intensive computer simulations via commercial software, OrCAD 9, and experiments.
AB - An innovative 3-phase AC (Alternative Current) drive circuit for the seismic disc in micro-gyroscopes is designed and verified by computer simulations and experiments. The in-plane dynamic model of the seismic disc with mass eccentricity and air gap against the centre bearing and the mathematic expression of two sinusoidal magnetic fields are developed respectively. In order to prevent the seismic disc from collision with the centre bearing and the EM (Electromagnetic) poles, an anti-collision controller is established by employing two Look-up tables which define the intensity of the applied current to the EM poles. Self-sensing technique is included to measure the real-time offset and angular position deviation (i.e., precession) of the disc by two orthogonal pairs of EM poles, without any additional sensors. The drive circuit under SPWM (Sinusoidal Pulse Width Modulation) operation and the anti-collision strategy are verified by intensive computer simulations via commercial software, OrCAD 9, and experiments.
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U2 - 10.1016/j.precisioneng.2010.09.003
DO - 10.1016/j.precisioneng.2010.09.003
M3 - Article
AN - SCOPUS:78049245287
SN - 0141-6359
VL - 35
SP - 133
EP - 142
JO - Precision Engineering
JF - Precision Engineering
IS - 1
ER -