机载预警雷达试飞检验方法的系统性研究
发布时间：2018-10-13 07:27
【摘要】：试飞检验是机载预警雷达在正式投入使用之前或维修之后必不可少的关键环节。现行的机载预警雷达试飞检验的方法主要是参考地基雷达的相关规范,不能全面的反应机载预警雷达的真实性能。同时,试飞检验也是一项耗时长、耗资巨大的过程。对新型雷达的试飞检验往往会持续数年以上,这就会耗费大量的人力、物力和财力。因此,系统性的研究机载预警雷达试飞检验的方法就变得尤为重要。本文的主要内容和工作如下:1.分析了机载预警雷达的探测性能。在具体安排某款机载预警雷达的试飞试验前,需要先知道该雷达整体的探测能力。为此,研究了杂波回波功率模型,其中详细介绍了划分地面网格、后向散射模型、空间坐标系转换和天线方向图等模块。之后,建立了目标回波和噪声的功率模型,并给出了仿真结果。进而绘制了距离-速度盲区图,该图能够全面的反映雷达的探测性能。2.编排了试飞测试方案。根据杂波回波功率图,分析了试飞中所关心的检飞地区的选择问题。针对现行试飞试验时只安排载机和目标机迎头飞行的缺陷,提出分方位向的安排斜向飞行的航线设计原则。接着,依照距离-速度盲区图按该原则以机载预警雷达在某些探测能力较弱的方位向上为例设计了试飞的航线。为了能够在一次试飞中能够尽可能多的找出雷达探测能力的薄弱区域,减少试飞所需的总时间,本文还设计了一条目标机对载机不可视的航线。3.研究了试飞实测数据的处理方法。本文建立了试飞实测数据处理的一系列流程,如先经过时间配准、坐标转换和野值剔除对数据进行预处理,接着按一定的距离采样间隔对数据进行分割,进而评估探测威力和测量精度这两项机载预警雷达的重要指标。在做数据分割时,根据用户所关心的结果,将采样点数的计算从发现概率统计可信度转换到探测距离统计可信度,依此求出合理的距离采样间隔。针对利用实测数据做精度分析时发现的载机拐弯时测量精度偏差较大这个问题,分析了偏差产生的原因并提出了解决方案。通过目标航迹修正后与修正前的对比证明了解决方案的可行性。4.制作了一款试飞仿真的小软件。重点介绍了该软件的组成框图和具体的实现方法,并演示了载机和目标机的试飞仿真结果。该软件具有友好的人机界面和良好的动态可视化效果。
[Abstract]:Flight test is an essential key link of airborne early warning radar before it is put into use or after maintenance. The current flight test methods of airborne early warning radar mainly refer to the relevant specifications of ground-based radar and can not fully reflect the real performance of airborne early warning radar. At the same time, flight testing is also a time-consuming and costly process. The flight test of the new radar will last more than a few years, which will cost a lot of manpower, material and financial resources. Therefore, the systematic study of airborne early warning radar flight test method becomes particularly important. The main contents and work of this paper are as follows: 1. The detection performance of airborne early warning radar is analyzed. Before arranging the flight test of an airborne early warning radar, we need to know the overall detection capability of the radar. In this paper, the clutter echo power model is studied, including ground grid division, backscattering model, spatial coordinate system transformation and antenna pattern. Then, the power model of target echo and noise is established, and the simulation results are given. Furthermore, the range-velocity blind area map is drawn, which can fully reflect the radar detection performance. 2. The flight test program was designed. According to the power diagram of clutter echo, the selection of detection area concerned in flight test is analyzed. Aiming at the defect that only onboard aircraft and target aircraft are arranged head-on in the current flight test, the principle of route design for inclined flight in azimuth direction is put forward. Then, according to the principle of range-velocity blind area map, the flight route of airborne early warning radar is designed as an example in some azimuth with weak detection ability. In order to find out as many weak areas as possible in a test flight and reduce the total time required for flight test, this paper also designs an invisible route of target aircraft to the carrier. The processing method of flight test data is studied. In this paper, a series of processes of flight test data processing are established, such as time registration, coordinate transformation and outliers elimination, data preprocessing, and then data segmentation according to a certain distance sampling interval. Then the detection power and measurement accuracy are evaluated as two important indexes of airborne early warning radar. In the process of data segmentation, according to the results concerned by the user, the calculation of the sampling points is transformed from the discovery probability statistical credibility to the detection distance statistical credibility, and the reasonable distance sampling interval is obtained. In order to solve the problem that the deviation of measurement precision is large when the load machine turns around, the cause of the deviation is analyzed and the solution is put forward. The feasibility of the solution is proved by the comparison between the target track correction and the correction. 4. A flight test simulation software is made. The composition block diagram and realization method of the software are introduced emphatically, and the flight test simulation results of the carrier and target aircraft are demonstrated. The software has friendly man-machine interface and good dynamic visualization effect.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN959.73
本文编号：2267781
[Abstract]:Flight test is an essential key link of airborne early warning radar before it is put into use or after maintenance. The current flight test methods of airborne early warning radar mainly refer to the relevant specifications of ground-based radar and can not fully reflect the real performance of airborne early warning radar. At the same time, flight testing is also a time-consuming and costly process. The flight test of the new radar will last more than a few years, which will cost a lot of manpower, material and financial resources. Therefore, the systematic study of airborne early warning radar flight test method becomes particularly important. The main contents and work of this paper are as follows: 1. The detection performance of airborne early warning radar is analyzed. Before arranging the flight test of an airborne early warning radar, we need to know the overall detection capability of the radar. In this paper, the clutter echo power model is studied, including ground grid division, backscattering model, spatial coordinate system transformation and antenna pattern. Then, the power model of target echo and noise is established, and the simulation results are given. Furthermore, the range-velocity blind area map is drawn, which can fully reflect the radar detection performance. 2. The flight test program was designed. According to the power diagram of clutter echo, the selection of detection area concerned in flight test is analyzed. Aiming at the defect that only onboard aircraft and target aircraft are arranged head-on in the current flight test, the principle of route design for inclined flight in azimuth direction is put forward. Then, according to the principle of range-velocity blind area map, the flight route of airborne early warning radar is designed as an example in some azimuth with weak detection ability. In order to find out as many weak areas as possible in a test flight and reduce the total time required for flight test, this paper also designs an invisible route of target aircraft to the carrier. The processing method of flight test data is studied. In this paper, a series of processes of flight test data processing are established, such as time registration, coordinate transformation and outliers elimination, data preprocessing, and then data segmentation according to a certain distance sampling interval. Then the detection power and measurement accuracy are evaluated as two important indexes of airborne early warning radar. In the process of data segmentation, according to the results concerned by the user, the calculation of the sampling points is transformed from the discovery probability statistical credibility to the detection distance statistical credibility, and the reasonable distance sampling interval is obtained. In order to solve the problem that the deviation of measurement precision is large when the load machine turns around, the cause of the deviation is analyzed and the solution is put forward. The feasibility of the solution is proved by the comparison between the target track correction and the correction. 4. A flight test simulation software is made. The composition block diagram and realization method of the software are introduced emphatically, and the flight test simulation results of the carrier and target aircraft are demonstrated. The software has friendly man-machine interface and good dynamic visualization effect.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN959.73
【参考文献】
相关期刊论文 前1条
1 任迎舟，张玉洪;机载相控阵雷达时空二维杂波的仿真[J];现代雷达;1994年02期
，本文编号：2267781
本文链接：https://www.wllwen.com/kejilunwen/wltx/2267781.html
