方向角模拟器设计

Design of the Directional Angle Simulator

方向角信息是飞行参数信号中比较重要的记录对象，因此，通过模拟方向角来测试飞行参数的记录仪对于方向角能否被正常记录及记录精度尤为重要。本文介绍了方向角模拟器各模块的组成、结构及原理，并对影响模拟方向角信号误差的因素进行了理论分析，为减小误差提供了理论依据。通过减少系统整流电路的误差和修正A／D转换的非线性误差，从而减少了系统的整体误差，获得了比较高的精度。

Directional angle is an important record information in the flight data, so it is very important to test whether the flight data recorder can record the directional angle normally and precisely through simulating the directional angle. The paper presents the constitution, structure and principle of each module of the directional angle simulator, gives a theoretical analysis of the factors which affect the error of simulating directional angle signal, and offers a theoretical basis for reducing the error. In the system the global error is reduced and higher accuracy is achieved by reducing the error of the system rectification circuit and modifying the non-linear error of the A/D conversion.