Abstract: 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.

Key words: 飞机货舱, 模拟烟雾, 烟雾发生器, 自回归历遍（ARX）辨识, 比例积分微分（PID）控制