挠性陀螺仪伺服回路中大力矩电流产生器的设计

Design of a High Torque Current Generator for Gyroflex Servo Loop

－本文提出一种用于挠性陀螺仪脉冲调宽再平衡回路的大力矩电流产生器的设计方案并付之实施。该力矩电流产生器由恒流源和Ｈ型电流开关组成。我们用集成稳压器设计了一个大电流恒流源。这一新颖的设计思想使恒流源的精度较容易达到１０￣（－４）数量级，从而满足了捷联式惯性测量系统的总体要求。由于采用了ＭＯＳ功率场效应管作为Ｈ型电流开关电路的开关元件，它具有极小的由栅级驱动电流引起的标度因数和偏置电流误差，所以使本设计具有较高的实际工程应用价值。

In this paper,we designed a high torque current generator which isused in a pulse-width-modulation rebalance circuit for gyroflex. It contqists of a Con-stant-Current Source and a H current switch.The former is constructed by the inte-grated Constant-Voltage circuit,the latter,by the power MOSFET. The accvracy ofthe current source can be 10￣(-4) ,the H current switch has a small seale factor error andbias current error caused by grid driving current.The design obtained here has a highvalue,and easy to be put into practice.