某型飞机着水识别方案研究

某型飞机具备在水上正常起降的功能,飞机的电传飞控系统在不同的飞行状态下对应不同的飞行控制律,控制律包括地面模式、起飞模式、空中模式、拉平模式、着陆/着水模式,不同的控制律模式飞机的操纵特性不同,因此工作模式之间切换时需要非常精准的时机,否则会造成事故或机毁人亡。飞机在着陆时可以通过起落架轮载开关作为判断着陆成功的信号,将控制律切换到着陆模式;飞机在着水时起落架始终为收起状态,再无其它可用的信号识别飞机是否成功着水。提出使用压力传感器、浮子式开关、水浸传感器等信号作为着水识别的方案,对不同的方案进行了权衡研究,得出成熟度最高的方案,并分析其可能存在的问题及相应的解决措施,最后得出结论。

Landing on the Water of Identification Solution Research forOne Type of Aircraft

An aircraft has the function of taking off and landing normally on the water. The fly by wire flight control system of the aircraft corresponds to different flight control laws in different flight states. The control laws include ground mode, take-off mode ,air mode, leveling mode and landing/landing mode. Different control law modes have different aircraft handling characteristics. Therefore,a very accurate time is required for switching between working modes ,otherwise accidents or aircraft damage and human death will be caused. When landing, the aircraft can switch the control law to the landing mode by using the landing gear wheel load switch as the signal to judge the successful land-ing;The landing gear is always retracted when the aircraft is landing,and there is no other available signal to identify whether the aircraft is landing successfully. Proposes to use the signals such as pres-sure sensor, float switch and water immersion sensor as the water identificationscheme, makes a trade-off study on different schemes, obtains the scheme with the highest maturity ,analyzes its possi-ble problems and corresponding solutions,and finally draws a conclusion.