无源定位技术有着广阔的应用前景,本文在现有单站无源定位方法的基础上,介绍了相位差变化率定位法.该方法利用观测平台上两个相互正交的相位干涉仪接收目标辐射电磁波的相位差及对应的变化率信息实现对目标的实时高精度定位.在空中观测平台的飞行姿态发生变化的情况下,可以通过姿态变化条件下的测量数据确定出目标在姿态变化后所对应的新载机坐标系中的位置,利用该坐标系与原平飞姿态下的参考载机坐标系之间的旋转矩阵即可得出目标在原平飞姿态下的参考载机坐标系中的位置,从而可得出目标在指定地面固定坐标系中的位置.文中给出了观测平台飞行姿态角变化情况下的定位表达式.仿真结果表明,该方法是一种发展前途较好的单站无源定位方法.

Technology of passive location has broad prospects in applications.In this paper,the method using phase difference rate of change for single observer-passive location is introduced based on existing methods.We can obtain the direction of the target with phase difference information of two orthogonal interferometers on the observer and the radial distance with corresponding phase difference rate of change.Then the target can be located with high speed and precision.When flying posture of the observer is changed,the target can be located in the new coordinate system according to measurement data.And its position in the original coordinate system can be obtained through the rotating matrix between two coordinate systems.Related locating expressions are given.Simulations show that this method is effective.