反推力装置“地面/空中”判定条件研究  

Research on the “ground/air” definition of thrust reverser for ground operation only

作　　者：孟军红 化东胜 MENG Junhong;HUA Dongsheng(China AVIC The First Aircraft institute,Xi’an 710089,China;AVIC XAC Commercial Aircraft Co.Ltd,Xi’an 710089,China)

机构地区：[1]航空工业第一飞机设计研究院,西安710089 [2]中航西飞民用飞机有限责任公司,西安710089

出　　处：《民用飞机设计与研究》2022年第2期102-110,共9页Civil Aircraft Design & Research

摘　　要：只在地面使用的反推力装置,一方面根据CCAR 25.933的要求在空中要防止意外打开;另一方面在地面使用时要求迅速可靠地打开,因此判断飞机在“地面”或“空中”成为反推控制系统的一个重要设计内容,若该条件判定飞机在地面的约束过于严格,则飞机着陆时反推不能尽早打开,影响反推在飞机高速时高效发挥作用;反之,若判定飞机在地面的约束过于宽松,则会增加反推在空中意外打开的概率,影响安全。分析了几种现役民航飞机的反推“地面/空中”判定条件,认为飞机后轮刚刚触地(但不一定触发轮载信号)是一个较好的“地面/空中”判定条件,设计时应注意判定条件须保持一定的独立性:不能因某一判定信号故障,导致反推、减速板或刹车中任何两个同时不能工作;不能因减速板或刹车的工作状态导致反推力装置不能打开,同时注意判定条件会影响适航的验证方法。On the one hand, the thrust reverser that operate on ground only will prevent accidental opening in air in order to comply with the CCAR 25.933;on the other hand, it is required to deploy reliably and rapidly when landing on the ground.Therefore, judging whether the aircraft is on the “ground or in the air” has become very important for the control design of thrust reverser.If the “ground/air” definition that judge the aircraft is on ground is too rigid, the thrust reverser can not be opened as soon as possible when landing, affecting the efficient role of the thrust reverser at high speed on the contrary, if the definition is too loose, it will increase the probability of accidental opening of the thrust reverser in the air.This paper analyzes the “ground/air” definition of thrust reverser for several civil aircraft in service, and considers that the main land wheels just touch the ground(but does not necessarily trigger the wheel load signal) is a good time to deploy.In the design, it should be noted that the definition to deploy should be independence:any two of the thrust reverser, wheel braking or spoiler speed braking can not work at the same time due to the failure of a judgment signal.The thrust reverser cannot be opened due to the working state of the wheel braking or spoiler speed braking.At the same time, it shall be noted that the definition have influence on the means compliance with CCAR requirements.

关 键 词：反推力装置 地面/空中 条件 后轮 触地 

分 类 号：V212[航空宇航科学与技术—航空宇航推进理论与工程]