客机座舱压力系统泄漏特性优化控制仿真研究

Simulation of the Optimizing Control of Leakage Characteristics for Civil Aircraft Cabin Pressure Control System

客机座舱压力控制系统泄漏特性优化控制用于提高改善的鲁棒性,改善客机乘坐舒适度。客机正常飞行过程中必然存在一定程度的泄漏,解决飞行状态发生变化或泄漏面积突然增加时,座舱压力与座舱压力变化速率绝对值瞬态大幅增长,超过人体正常承受范围并且需要一定的调节时间才能降到正常水平这一问题,是提升客机舒适性体验的重要环节。传统的PID控制与模糊PID控制方式不能很好的解决这一问题,利用自适应模糊PID控制方式设计的控制系统优化了物理论域到模糊论域的映射,在飞行状态发生变化及泄漏面积突然增加时具有更小的座舱压力误差与座舱压力变化速率波动、更短的调节时间及更少的气体泄漏量,具有更强的控制鲁棒性。

Optimizing control of leakage characteristics for aircraft cabin pressure control system is to improve the robust of the system and the riding comfort of civil aircraft. A certain extent of gas leak in cabin is unavoidable. When the flying mode of aircraft changes, there will be a transient increase in absolute value of the cabin pressure error and rate of cabin pressure change which may exceed the bearable scope of human bodies. It is crucial for the improvement of passengers' riding comfort to solve this problem. Nevertheless, the traditional PID control and fuzzy PID control are not good solutions. By optimizing the mapping from physical domain to logical domain, a controller of self -adaptive fuzzy PID was designed. The controller shows less fluctuation of cabin pressure error and rate of cabin pressure change, less setting time and less gas leak, and better robust when the flying mode changes or area of leakage increases abruptly.