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1.前言在惯导系统中,加速度计作为检测载体加速度的传感器,与陀螺共同构成惯性导航控制系统。加速度计大致可分为摆式与非摆式两种。目前,惯导系统中多采用摆式加速度计。摆式加速度计的摆组件的支承方式有尖轴式,宝石轴承式,挠性支承式以及磁轴承式。实践证明,尖轴式,宝石轴承式和无接触型的磁轴承式都存在一定的固有缺陷。例如尖轴式宝石轴承式,尽管加工精度很高,但仍然不可避免的存在配合间隙。因而产生了输出轴不稳定的摩擦力矩。磁轴承虽然能够有效的减少摩擦,但这种轴承是由机械和电气两部分构成,其结构较复杂,
1. Introduction In inertial navigation system, the accelerometer as a sensor to detect the acceleration of the carrier, together with the gyroscope constitute inertial navigation control system. Accelerometer can be divided into two kinds of pendulum and non-pendulum. At present, the inertial navigation system more use of pendulum accelerometer. Pendulum accelerometer pendulum components are supported by sharp-axis, gem bearing type, flexible bearing and magnetic bearing type. Practice has proved that sharp-axis, gem bearing and non-contact type of magnetic bearing type there are some inherent shortcomings. For example, the sharp-axis gem bearing type, despite the high precision machining, but still inevitably exist with the gap. As a result, the output shaft is unstable in terms of friction torque. Although the magnetic bearing can effectively reduce friction, but this bearing is composed of mechanical and electrical two parts, the structure is more complicated,