摘要
某型民用运输类飞机采用了尾吊发动机和高平尾的气动布局,使得飞机存在深失速的可能性。为了使飞机的失速特性能够满足适航标准的规定,研制了以推杆器为核心的失速保护系统。在推杆器的研制试飞过程中,发现飞机在巡航构型下,推杆器被激发工作后,飞机改出失速的过程中出现了负过载,这是适航条例所不能接受的。分析了飞机在失速试飞过程中负过载出现的原因,通过调整推杆器工作逻辑和设计飞行试验,找出飞机在巡航构型下的最佳推杆器工作行程,既满足飞机失速改出过程中不出现负过载的适航要求,又使得推杆器有足够能力帮助飞机改出失速状态。对更改后的推杆器工作逻辑进行飞行试验验证,试验结果表明,失速改出过程中的负过载问题得到了完善的解决。
A type of civil transport aircraft uses tail mounted engines and high horizontal tail.This aerodynamic layout gives the aircraft the possibility of a deep stall. In order to meet the requirements of airworthiness standards,a stall protection system with a pusher is developed. In the development process of the test rod pusher,it is found that in cruise configuration,when push rod device is excited,there has been negative overload in the aircraft in the process of stall recovery,and it is not acceptable to the airworthiness regulations. The causes of the occurrence of negative overload in the course of stall flight test are analyzed in the paper. By adjusting the working logic of the pusher and the design of flight test,the optimal stroke of the pusher of aircraft in cruising configuration is found out. This setting satisfies the airworthiness requirements of the aircraft without any negative overload during the stall recovery process,and also enables the pusher to have sufficient capability to help the aircraft during stall. The flight test is carried out to verify the working logic of the modified push rod device. The test results show that the problem of negative overload in the process of stall has been well solved.
作者
屈飞舟
张文星
Qu Feizhou;Zhang Wenxing(Chinese Hight Test Establishment,Airplane Institute of Technical center,Xi＇an 710089,Shaanxi,China)
出处
《工程与试验》
2018年第2期57-60,共4页
Engineering and Test
关键词
失速保护系统
推杆器
负过载
stall protection system
pusher
negative overload
