最小割集法在极限改善因子故障诊断中的应用

Application of minimum cut sets method in analysis and diagnosis for limit improvement factor

新一代天气雷达极限改善因子是否达标直接影响雷达回波信号的谱估计和滤波能力,为了更好地解决极限改善因子中不同频率的毛刺干扰问题,介绍了极限改善因子参数的测试原理,详细阐述了最小割集法的原理,并结合信号的功率、脉冲包络参数指标,对影响极限改善因子的发射和接收链路逐一进行分析,并以相关故障诊断实例说明最小割集法的实现过程。通过分析极限改善因子异常的原因,不仅可以为雷达技术人员更好的完成雷达现场测试和维修维护提供指导和帮助,而且能够提高测试效率,保障雷达正常稳定运行。

The limit improvement factor of CINRAD/SA transmitter,which is the abbreviation of SA model of China New Generation Radar,is including two parts of transmitter input and output limit improvement factors.It can affect the spectrum estimation of radar echo signal and the filtering capabilities.In order to analyze and diagnose for abnormal limit improvement factor of CINRAD/SA transmitter,we introduce its principle firstly in this paper,elaborate mathematical model of minimum cut sets method,combining with the signal power and pulse envelope,then analyze the transmitter and receiver circuits which can impact the limit improvement factor,and last classify the disturbance causes of different frequency.We can find the causes for interring and provide relevant solutions in this way,give better advice and assist for radar technologists to complete test on site and the work of maintenance and service,ensure CINRAD/SA running smoothly.