论文部分内容阅读
为了提高机载跟踪雷达的跟踪精度,应用最佳估值理论,根据概率控制模型对角度跟踪系统和距离跟踪系统的状态进行估值,而跟踪回路采用由这种估值得出的天线角速度指令值。本文对这种跟踪回路进行研究。为了以文献〔2〕、〔4〕的跟踪系统模型为基础,模拟实际跟踪雷达的特性和跟踪雷达的运行情况,本文研究了角度误差接收部分的方位角和仰角通道的相互干扰,并研究了采用2轴万向支架的天线空间稳定回路的两个通道间的相互干扰,以及由目标和歼击机的相对距离比较近时对跟踪精度产生重要影响的角度起伏和距离起伏引起的观测误差等。本文得出了与跟踪雷达的运用状况更接近的模型,由测量差(Measurement Difference)法推导出用于状态估值的最佳滤波器,并通过相对3维运动的模拟,研究了这些干扰和起伏对跟踪精度带来的影响。
In order to improve the tracking accuracy of the airborne tracking radar, the optimal estimation theory is applied to estimate the state of the angle tracking system and the distance tracking system according to the probability control model. The tracking loop uses the antenna angular velocity command value. This paper studies the tracking loop. In order to simulate the characteristics of the actual tracking radar and track the operation of the radar based on the tracking system model of [2] and [4], this paper studies the mutual interference between the azimuth and elevation channels of the receiving part of angle error The mutual interference between the two channels of the antenna space stabilizing circuit with 2-axis gimbal and the observational errors caused by the undulating and distance fluctuation that have an important influence on the tracking accuracy when the relative distance between the target and the fighter are relatively close, and so on. In this paper, a model that is closer to the state of tracking radar is derived. The optimal filter for state estimation is derived from the Measurement Difference method. The relative 3-D motion is simulated to study these interferences and Fluctuations on the tracking accuracy of the impact.