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通讯、导航、识别综合系统在时分多址通讯的基础上可实现无源测距,配备适宜的软件便可完成相对导航功能。许多研究表明,采用广义卡尔曼滤波器可以较好地估计出成员的相对位置。 实际运用时,成员在水平面上(xoy)分布很广(半径500km),而在高度方向上则分布于狭小的区域内(20km左右)。这样的分布使得卡尔曼滤波器高度估计误差较大(几百米)。引入高度测量数据可减小高度估计误差,高度数据由机载膜盒式气压高度表提供。
The integrated system of communication, navigation and identification can realize passive ranging based on the time division multiple access communication and can be equipped with suitable software to complete the relative navigation function. Many studies have shown that the use of generalized Kalman filter can better estimate the relative position of members. In actual use, members are widely distributed in the horizontal plane (500km in radius), while in the height direction they are distributed in a narrow area (about 20km). This distribution makes the Kalman filter height estimation error greater (a few hundred meters). The introduction of height measurement data to reduce the height estimation error, altitude data provided by the airborne capsule pressure altimeter.