对航空相机故障的诊断只能判断到系统级, 而不能诊断出具体出现故障环节, 文中在研究航空相机调焦系统工作原理的基础上, 针对航空相机调焦系统测控流程分析其故障原理, 详细对可能出现故障的具体环节:行程开关、高精度位置传感器、驱动器及电机、RS422通信, 通信请求进行研究, 建立故障诊断系统, 完成对CCD航空相机调焦系统具体环节的故障诊断。

The fault diagnosis of the aerocamera can only judge to system level and the detailed fault elements cannot be diagnosed. To resolve the problem, based on the research of the operation principle of aerocamera auto-focusing system, the fault principle is analyzed according to the measurement and control flow-sheet of aerocamera auto-focusing system. The detailed elements possible producing fault such as stroke switch, high accuracy position sensor, driver, electric motor, RS422 communication and communication request are studied in detail. And the fault diagnosis system is built to complete the detailed elements diagnosis for CCD aerocamera auto-focusing system.