摘要
旅客机高空巡航时,座舱内相对湿度很低。为研究飞行过程中旅客机座舱湿度的动态特性,通过合理的分析与简化,应用集总参数法建立了座舱湿度的动态特性模型,给出了加湿系统调节阀的数学模型,并根据模型对整个飞行过程中座舱湿度的动态特性和加湿系统的控制策略进行了仿真研究。仿真结果表明:巡航过程中,旅客机座舱相对湿度低于美国采暖、制冷与工程师协会所规定的最低舒适标准20%～30%,需对座舱进行加湿;采用模糊控制策略的加湿系统具有稳定、超调小的特点,优于传统的PID控制策略,能很好地满足旅客机座舱加湿的要求。
During cruise flight, airliner cabin relative humidity is very low. In order to investigate dynamic characteristics of airliner cabin humidity in flight, a dynamic model was established, by means of Lumped Parameter Method with physical analysis and logical simplification. And the flow characteristics equation of humidifying system ＇s regulator valve was derived. According to the model, the control strategy of cabin humidifying system was simulated and analyzed. The results indicate that the value of the cabin relative humidity is lower than the minimal comfort humidity standard value of the American Society of Heating Refrigerating and Airconditioning Engineers that is 20%-30%, it is required to enhance humidity value. The humidifying system with fuzzy controller could satisfy the system design demands. And it is demonstrated that the,fuzzy control strategy is more stable and less overshoot than the conventional proportional-integral-differential control strategy.
出处
《系统仿真学报》
EI
CAS
CSCD
北大核心
2006年第4期989-991,共3页
Journal of System Simulation
关键词
旅客机座舱
相对湿度
控制策略
集总参数
仿真
Airliner cabin
Relative humidity
Control strategy
Lumped Parameter
Simulation
