RAT系统作动筒阻尼孔的设计与仿真技术  

Design and Simulation of Damping Holes in RAT Actuators

作　　者：李海亮 蔡景[1] LI Hailiang;CAI Jing(College of Civil Aviation,Nanjing University of Aeronautics&Astronautics,Nanjing,211106,China)

机构地区：[1]南京航空航天大学民航学院,南京211106

出　　处：《南京航空航天大学学报》2020年第6期923-929,共7页Journal of Nanjing University of Aeronautics & Astronautics

基　　金：中央高校基本科研业务费专项资金(NP2019408)资助项目。

摘　　要：冲压空气涡轮(Ramjet air turbine,RAT)在紧急情况下释放能够为飞机提供所需的电能和液压动力,从而保证飞机安全。RAT系统能否在规定时间内顺利释放是保证飞机安全的关键,其释放速度主要靠作动筒的阻尼孔来控制,但是目前国内在RAT作动筒阻尼孔的设计方面缺乏研究。为此,利用仿真技术,开展了RAT系统作动筒阻尼孔的设计研究。首先根据RAT作动筒的结构和工作原理,使用AMESim建立了RAT作动筒模型,并验证了模型的正确性。AMESim是一种基于物理模型的建模仿真平台,其中包含液压元件设计库、动力传动库等,在液压系统的建模仿真方面应用十分广泛。然后通过仿真试验,研究了阻尼孔的设计对RAT释放时间的影响规律及程度。最后,针对支线飞机和小型飞机的RAT释放时间要求(0.6~0.8 s),对阻尼孔进行了最优设计,从而为RAT系统作动筒阻尼孔的设计工作提供支持。Ramjet air turbine(RAT)can provide the electrical and hydraulic power needed in an emergency to keep the aircraft safe. The key to ensure the safety of aircraft is whether the RAT system can release energy smoothly within the specified time. The releasing speed is mainly controlled by the damping hole of the actuator cylinder,but there is a lack of research on the design of the damping hole of RAT actuator cylinder in China. Therefore,the design of damping hole of actuator cylinder in RAT system is studied by using simulation technology. First,according to the structure and working principle of the RAT actuator,the RAT actuator model is established by using AMESim,and its correctness is verified. AMESim is a model and a simulation platform based on physical model,which includes hydraulic component design library,power transmission library,etc. It is widely used in modeling and simulating of hydraulic systems. Then,through the simulation experiment,the effect of damping hole design on RAT releasing time is studied.Finally,for the RAT releasing time requirements(0.6-0.8 s) of regional aircraft and small aircraft,the optimal design of damping holes is carried out,which provides support for the design of damping holes of RAT actuators.

关 键 词：载运工具运用工程 冲压空气涡轮 作动筒 阻尼孔 AMESIM 

分 类 号：TH137[机械工程—机械制造及自动化]