摘要
先前的相位差变化率定位方法中不仅需要相位差变化率参数,还需要获取方位和俯仰信息,而这通常需要利用二维相位干涉仪来实现,在一定程度上增加了平台的载荷负担。针对航空平台ESM设备普遍采用一维相位干涉仪的实际情况,提出了一维干涉仪体制下的运动单平台无源定位算法,该算法通过采用圆锥向角代替方位和俯仰角并与相位差变化率及目标高程先验组合即可实现对目标的瞬时定位,利用Monte-Carlo仿真实验计算和分析了算法的定位误差,得到了干涉仪安装方式和平台姿态模式的优化原则,分析了目标先验高程误差对定位精度的影响。针对测量精度较低的情况,引入中心差分滤波算法对累积测量进行处理以提高定位跟踪精度。研究表明,这些有益结论可以为系统的设计和工程应用提供理论指导。
Due to the calculating requirement of azimuth angle and elevation angle, the foregoing passive localization system need 2-dimensional interferometer installation. In order to alleviate the load of platform, for 1-dimensional interferometer system only the conical bearing was obtained, a localization methodology was proposed here using conical bearing and rate of phase difference changes, the localization error was computed and simulated by Monte-Carlo experiment, the principle of interferometer heading and attitudes vibration was showed clearly. When measurements error was big, a sequentially process should be applied to improve location precision and a new algorithm CDKF （Central Difference Kalman Filter） was introduced. The investigation results show the conclusions would be useful for the design and operation of the system.
出处
《系统仿真学报》
CAS
CSCD
北大核心
2009年第22期7205-7210,共6页
Journal of System Simulation
基金
863项目(2006AA701303)
国家自然科学基金(60702010)
航空科学基金(20070888005)
关键词
无源定位
干涉仪
相位差变化率
圆锥向角
中心差分滤波
passive localization
interferometer
rate of phase difference changes
conical beating
CDKF
