飞机货舱模拟烟雾的闭环控制研究

Research on closed-loop control of simulated smoke in aircraft cargo compartment

考虑到试验过程的安全性,飞机货舱烟雾探测系统适航验证试验一般不会使用真实火灾烟雾,而是通过烟雾发生器产生模拟烟雾进行试验。但是烟雾发生器产生的模拟烟雾与真实火灾烟雾有一定的差异,要想在验证过程中使两种烟雾达到近似的效果,就需要对模拟烟雾进行闭环控制,从而能更加准确地进行烟雾探测系统的验证。首先,在火灾动力学模拟器(FDS,fire dynamics simulator)中建立烟雾模拟数值模型,设定烟雾发生器发烟的边界条件,计算得出目标位置处的烟雾数据,然后辨识出模拟烟雾的代理模型,最后设计闭环控制律。研究结果表明,建立的烟雾模拟模型符合要求,设计的控制律能达到对模拟烟雾的控制效果。通过对模拟烟雾的闭环控制研究,可以为飞机货舱烟雾探测的验证工作提供可行的方法和支持。

Considering the safety of the test process,the real fire smoke will not be used generally in the airworthiness verification test of the smoke detection system of aircraft cargo compartment,while the simulated smoke generated by the smoke generator will be used for the test.However,there are certain differences between the simulated smoke generated by the smoke generator and the real fire smoke.In order to achieve similar effects between the two kinds of smoke during the verification process,closed-loop control of the simulated smoke is required to more accurately verify the smoke detection system.Firstly,the numerical model of smoke simulation is established in the fire dynamics simulator(FDS),the boundary conditions of smoke generation of the smoke generator are set,the smoke data at the target location is calculated.Then the proxy model of simulated smoke is identified,and finally the closed-loop control law is designed.The research results show that the established smoke simulation model can meet the requirements,and the designed control law can achieve the control effect of the simulated smoke.Through the research on closed-loop control of simulated smoke,feasible methods and support can be provided for the verification of smoke detection in aircraft cargo compartment.