基于多体动力学的大型翼伞系统飞行仿真分析  

Flight simulation of large parafoil-payload systems based on multibody dynamics

作　　者：陈建平[1] 宁雷鸣[1] 张红英[1] 童明波[1] 

机构地区：[1]南京航空航天大学航空宇航学院,江苏南京210016

出　　处：《飞行力学》2015年第6期486-490,共5页Flight Dynamics

基　　金：国家自然科学基金资助(11002070);航空科学基金资助(2012ZC52035)

摘　　要：飞行动力学分析是大型翼伞系统设计及归航方案研究的重要基础。为此,提出了基于多体系统动力学理论的大型翼伞系统飞行动力学仿真分析方法,给出了相应的多体系统模型,建立了系统的运动学约束方程组和飞行动力学变分方程组。通过引入拉格朗日乘子,获得了大型翼伞系统封闭的飞行动力学方程组,对某大型翼伞系统的飞行动力学过程进行了仿真计算。结果表明,与小型翼伞系统相比,大型翼伞系统的稳定滑翔速度大、抗外界干扰能力强、转弯半径大、转弯周期长、操纵响应慢。此外,风速和风向对大型翼伞系统的飞行轨迹和着陆点的位置有明显影响。对于同一具翼伞,回收物重量和初始高度是影响留空时间的主要因素。所提方法可以有效、准确地应用于大型翼伞系统的飞行动力学仿真分析。Flight dynamic analysis is important for design and homing project research of large parafoilpayload systems. In order to do this,a new method based on the theory of multibody dynamics is presented. A multibody system consisting of a fixed-shape parafoil canopy and a payload body is given. The kinematic constraint equations and flight dynamic equations obeyed by a large parafoil-payload system are derived. By introducing Lagrangian multipliers,the closed flight dynamic equations of a large parafoilpayload system are developed in detail with the application of the theory of dynamics of multibody systems. And the obtained equations are used to compute the flight response of a large parafoil-payload system. The computational results show that,compared with small parafoil-payload systems,large parafoilpayload systems have some features such as higher steady glide speed,stronger anti-interference ability,longer turning flight radius,longer turning flight period and slower controlling response. In addition,there are obvious effect of wind speed and wind direction on flight trajectory and landing point of large parafoil-payload systems. For the same parafoil,payload and initial height are the main factors influencing the stay time of the system in the air. The method in this paper can be applied to flight dynamic simulation of large parafoil-payload systems efficiently and accurately.

关 键 词：翼伞系统 飞行动力学 多体系统 动力学建模 数值仿真 

分 类 号：V212.1[航空宇航科学与技术—航空宇航推进理论与工程]