空投系统航向测量方法研究

摘要

Heading information is a very important parameter during the precision airdrop system. Magnetic attitude system uses geomagnetic field to measure the attitude information of the vehicle. It has some merits such as small size, high precision and stable performance. However, it also has the inherent characteristic of sensitive to the external interferences, while the rate gyroscope of inertial device does not have such shortcoming. Thus the two types of these sensors can be combined to measures the heading information. Simulation results prove that the heading error can be improved greatly as the introduction of external attitude information, which meets the precision airdrop system.%航向信息是空投系统运行中一个非常重要的参数,磁航姿系统能够利用地磁场来测量载体的姿态信息,体积小、精度高,但却易受外界磁场的干扰；而惯性器件恰好具有不受环境磁场影响的特性.将两种传感器组合起来,共同测量载体的航向信息.经过仿真验证,外部姿态信息的引入极大地改善了系统的航向误差,满足空投系统应用需求.