| 摘要: |
| 利用一种机内测试（BIT）设计提高了二次雷达系统的任务可靠性，将二次雷达集成系统中原本独立的雷达敌我识别（IFF）和航管（ATC）二次雷达通道变为互备份通道，在一路通道正常的情况下就能成功执行两种二次雷达任务，无需人工干预，切换时间为微秒级，大大提高了任务实时、可靠的完成能力。同时，系统BIT设计中采用了集中-分布式相结合的BIT设计方式，融合两者的优势，完成通道状态的准确判断，能够将故障定位到现场可更换单元（LRU）。这种BIT设计方法的优点在于提高故障检测率的同时有效降低了系统的虚警概率，提高了系统的测试性和维修性；在不增加硬件资源的情况下，提供了一种简单灵活的热备份方法，大大提高了系统的任务可靠性。这种设计方法已成功应用于实际工程，提高了系统的综合性能。 |
| 关键词: 二次雷达 机内测试 环绕测试 任务可靠性 |
| DOI： |
|
| 基金项目: |
|
| A new design method for improving mission reliability of a secondary surveillance radar system based on built-in test |
| CUI Xu-hui |
| () |
| Abstract: |
| Built-in test(BIT) is used to improve mission reliability of a secondary surveillance radar(SSR) system. The independent Identification Friend or Foe(IFF) channels and the SSR for air traffic control（ATC） channels become mutual backup channels，as long as there is one normal channel，the system can successfully execute the two tasks of SSR without human intervention.Thereby the ability to complete the task quickly and reliably is greatly improved. At the same time，the approach uses centralized BIT design and distributed BIT design，combines the advantage，and judges the state of channels accurately，and fault location in the line replaceable unit (LRU) is realized.The advantage of this design method is to improve the fault detection rate and reduce the false alarm rate in the system，increase testability and maintainability of the system. This design method provides a simple and flexible method of hot backup without increasing the amount of hardware，thus improving mission reliability of the system. This design method has been applied in an engineering project and the overall performance of the system has been improved. |
| Key words: secondary surveillance radar built-in test（BIT） wrap-around test mission reliability |
《电讯技术》编辑部 