客舱数字压力控制系统的仿真分析

Simulation Analysis of Digital Control System for Cabin Pressure

客舱压力的控制是商用飞机主制造商必须攻克的关键核心技术之一;基于参数固定的经典PID压力控制器难以适应复杂多变的客舱内外环境,严重影响了乘客乘坐的舒适性,也对飞行安全构成了严重威胁;推导并简化客舱和排气阀门的数学模型,设计数字模糊自适应PID控制器;仿真结果表明,当飞行参数、供气参数等发生变化时,客舱压力采用模糊自适应PID控制要比采用经典的PID控制稳定得多;这不仅增加乘客乘坐舒适性,提升乘坐体验,而且避免压力交替对飞机结构造成疲劳损伤,提高飞行安全,增强飞机的市场竞争力。

Cabin pressure control is one of the key technologies that commercial aircraft manufacturers must focus on.The traditional PID pressure controller based on fixed parameters is difficult to adapt to the complex and changeable environment inside and outside of the cabin,which seriously affects the passenger comfort and gives a serious threat to the flight safety.The mathematical model of cabin and exhaust valve are established and simplified.A fuzzy adaptive PID controller is designed.The simulation results show that the fuzzy adaptive PID controller is much more stable than the traditional PID controller when the flight parameters,air supply parameters and so on change.It will not only increase passenger comfort and ride experience,but also avoid fatigue damage to aircraft structure caused by pressure alternating actions.This will help to improve flight safety and enhance the market competitiveness of aircraft.