摘要
综合地形跟随/地形回避(TF/TA)是新一代低空突防技术,其中的轨迹规划技术是飞行器低空突防飞行控制律设计的重要依据。针对飞行器实时飞行过程中存在各种误差因素影响规划轨迹性能的情况,设计卡尔曼滤波器在实时轨迹规划中对所获取的飞行器高度值进行修正,可以获得比较精确的离地高度信息提供给飞行器,从而增加飞行器的安全系数。建立系统的状态与观测数学模型,在给定初始值和噪声方差阵的情况下进行了仿真。仿真结果显示所设计的卡尔曼滤波器可行,大大减小了组合导航系统误差模型的作用效果。
The integration of terrain following/terrain avoidance is a new technique of low altitude penetration. And the trajectory programming technology is the important base of the design of control laws. In the course of flight exist various error factors which will affect the performance of the trajectory. A Kalman filter is designed to modify the acquired ahitude of aircraft in real - time, thus comparatively accurate ahitude information could be provided so as to increase the safety coefficient of aircrafts. The status model and observation model of the system are built and simulation is finished with the given initial values and variance matrix of the noises. The simulation resuhs indicate that the Kalman fiher is feasible. It greatly reduces the effects of combined navigation system error models.
出处
《计算机仿真》
CSCD
2005年第10期74-77,共4页
Computer Simulation
关键词
轨迹规划
卡尔曼滤波
误差因素
安全系数
Trajectory programming
Kalman filter
Error factors
Safety coefficient
