民用飞机应急照明触发电路设计

应急照明系统用于为机上人员的应急撤离提供照明,当飞机电源失效后自动开启。因此,应急照明的触发时机及方式将直接影响机上人员应急撤离的效率。目前,民用飞机一般都用应急照明电源充电线路的掉电来触发应急照明,该触发方式限制了应急照明的开启时间,对适航取证存在风险。提出了一种全新的应急照明触发电路设计方法,并详细介绍了其设计原理和控制逻辑。该应急照明触发电路设计可显著降低适航取证的风险和飞机的研发成本,为民用飞机应急照明系统的设计提供重要的指导意义。

Override Circuit Design of Emergency Lighting for Civil Aircraft

The emergency lighting system provides illumination for the passengers to emergency evacuation and works automatically when the aircraft power fails, so the override time and method of emergency lighting has direct influence to the efficiency of passengers' evacuation. At present, the emergency lighting on civil aircraft was mostly overridden by the failure of emergency power supply charging bus, which limits the opening time of emergency lighting and has risk on airworthiness certification. This article introduces a new override method of emergency lighting and interprets the design theory and control logic in detail. The override circuit design of emergency lighting can improve the airworthiness and reduce the research cost of aircraft, and can provide guidance for the design of emergency lighting on civil aircraft.