轴偏心对磁流体微角振动传感器输出特性的影响分析OA

With the upgrade of the detection distance requirements in the aerospace field at the national strategic level,the influence of micro-angle vibration on the payload pointing accuracy is becoming more and more obvious.The magnetofluid micro-angle vibration sen-sor has the characteristics of low noise,wide frequency band,and impact resistance,and is currently the most suitable method for on-or-bit micro-angle vibration measurement.In fact,when the ferrofluid micro-angle vibration sensor is installed on the carrier to achieve high-precision angular vibration measurement,there is an inevitable deviation between the sensitive axis of the sensor and the rotating axis of the carrier.The influence of shaft eccentricity on the output characteristics of magnetofluid micro-angle vibration sensor is quanti-tatively analyzed through finite element simulation,and the influence of shaft eccentricity on the motion state of the conductive fluid in-side the sensor is explored.The simulation results show that with the increase of the shaft eccentricity distance,the output sine good-ness-of-fit and noise characteristics of the sensor become worse,and the scale factor will gradually decrease with the increase of the ec-centricity distance.