Simulated Smoke Closed-Loop Flow Control Method in Aircraft Cargo Hold

The airworthiness certification of aircraft smoke detection system includes ground test and flight test; Because the use of real fire source in flight test will increase the risk of the test, therefore, for safety and economic considerations, the simulated smoke generated by the smoke generator is usually used in flight test to replace the real fire smoke, so as to check the alarm function of the cargo hold smoke detector. The simulated smoke generator is an important experimental equipment to replace the real fire source for verification. The existing smoke simulation devices based on open loop control are not effective in simulating the unstable field of fire smoke concentration. In this paper, the smoke mode control device of the smoke generator is designed, and the closed-loop control system is formed with the simulated aircraft cargo hold and smoke generator, and the target tracking control experiment is carried out. The experimental results show that better control effect can be achieved at both near and far points, and its control performance is related to the distance from the measuring point to the smoke outlet. It provides technical guidance for the follow-up development of smoke flow control..