调频毫米波近程雷达半实物仿真综合测试系统研究

Research on integrated measurement system of LFMCW MMW short range radar HWIL simulation

为了满足非大气窗口毫米波近程雷达系统性能测试的需要,通过对三角波线性调频连续波近程雷达测距的分析,以典型弹道某靶机为例,建立了基于LabVIEW8.5的半实物时域、频域和嵌套调用MATLAB7的Margenau-Hill调制域综合试验平台,结果表明混频器差频信号真实地反映了弹目视在距离的变化,与传统测试系统相比,基于虚拟仪器技术的综合测试系统,具有可操作性强、功能强大、可实现高速数据的自动采集和测距以及时频分析的特点,在工程实际中具有广阔的应用前景,同时也分析了引起系统测距误差的原因。

In order to meet the requirement of the system performance test of non-atmospheric window millimeter wave （MMW） short range radar, a hardware-in-the-loop （HWIL） simulation integrated experiment platform was built up, which includes time domain, frequency domain and Margenau-Hill modulation domain nested MATIAB7 and is based on LabVIEW 8.5. The platform concerns a target drone in the typical trajectory and analyzes the triangle linear frequency modulated continuous wave （LFMCW） distance-measuring principle. Test result indicates that the difference-frequency signal of the mixer really reflects the variation of the missile-target distance. Compared with traditional measurement system, the integrated measurement system based on virtual instrument technology features the characteristics of good maneuverability, strong functionality, high speed automatic data acquisition, distance test and time-frequency analysis. The system has wide application future in practice engineering. At the same time the cause of distance measurement error is also analyzed.