RAT释放过程多体运动学研究  

Research on the Release Process of Ram Air Turbine Based on Multi-body Kinematics

作　　者：周连骏 林杏子 夏天翔 周明智 杜鑫 ZHOU Lianjun;LIN Xingzi;XIA Tianxiang;ZHOU Mingzhi;DU Xin(Jincheng Nanjing Electromechanical Hydraulic Engineering Research Center,China Aviation Industry Corporation,Nanjing 211106,China)

机构地区：[1]中国航空工业集团公司金城南京机电液压工程研究中心,江苏南京211106

出　　处：《机械制造与自动化》2023年第1期59-64,共6页Machine Building & Automation

摘　　要：冲压空气涡轮(RAT)系统属于飞机应急能源,当飞机失去主、辅动力时,可为飞机提供应急电能和液压能。基于某类冲压空气涡轮运动机构的几何、运动约束关系,建立了RAT的通用运动学模型;使用Matlab程序计算RAT释放过程中关键铰点的轨迹、速度和加速度;对RAT关键设计参数进行敏感性分析,研究了收放作动器和舱门连杆安装位置对RAT执行机构运动特性的影响;运用LMS Virtual.lab Motion平台搭建了该类RAT的多体模型。通过计算对比可以发现:所建运动学模型的计算误差在5%以内。Ram Air Turbine(RAT)system,as the emergency power system of aircraft,can provide aircraft with emergency power and hydraulic energy in failures of both rxaircraft main and auxiliary power systems.A general kinematic model of RAT is built based on the geometric and motion constraints of the RAT movement mechanism.The Matlab program is applied to calculate the trajectory,speed and acceleration of the key hinges in RAT release process.The sensitivity analysis of the key design parameters of RAT is conducted,and the influence caused by the installation positions of the actuator and the cabin door connecting rod on the movement characteristics of RAT actuator is studied.The multi-body dynamics model of one certain kind of RAT is built with LMS Virtual.lab Motion.By comparing the calculation results,it is concluded that the computational error of the model is less than 5 percent.

关 键 词：冲压空气涡轮 释放过程 运动学 MOTION 敏感性分析 

分 类 号：O313.7[理学—一般力学与力学基础]