寻北仪系统的挠性陀螺伺服电路设计

Design of Flexible Gyroscope Servo Circuit For North-seeking System

分析了挠性陀螺及其寻北原理,针对使用挠性陀螺作为敏感器件的寻北仪系统,提出了一种结构简单的陀螺伺服电路;对应给出的伺服电路原理图,分析了各个组成模块的功能;同时根据系统精度的要求及测试中发现的实际问题,通过采用补偿系统零位、选择合适采样电阻、增加延时电路等方法,可以实现减少放大器零偏对测量信号的干扰、较好地解决寻北精度与陀螺进动角速度之间的矛盾、提高系统的可靠性和稳定性等目的;实验证明在样机上改善效果显著。

The principle of a flexible gyroscope and its north--seeking theory are introduced. And then this paper proposes a simple-- structured servo circuit for north--seeking system which uses flexible gyroscope as its sensing device and analyses the function of the components. The servo circuit principle picture is shown. This servo circuit adopts appropriate sampling resistance and compensating system neutral position to improve the north--seeking precision and increase the gyroscope precession angular velocity as well as to reduce the signal disturb, which are all required in practice. Experiments prove that it makes marked progress on preproduction model.