基于虚拟样机技术的典型民用飞机起落架多体动力学联合仿真

摘要

起落架系统是飞机重要承力并兼有操纵特性的机构,其包括动力学、控制、液压等系统.在严重影响飞机安全的起降着陆过程中,担负着十分重要的使命.以典型民用飞机起落架收放系统为研究对象,分析其动力学行为,采用LMS Virtual.Lab Motion和LMS Imagine.Lab AMESim软件进行起落架收放动力学仿真,研究负载对起落架收放的影响以及机构间摩擦力对收放性能的影响.结果表明:模型能在规定时间内收起,负载对收放有明显影响.%The landing gear system (LGS) is an important component of aircraft which supports the aircraft and has a characteristic of control,including the aerodynamics,control,hydraulic and others.It has a very important mission,which seriously influences the safety of an aircraft,especially during the process of landing and taking off.LGS extension/retraction system of a typical civil aircraft is taken as a research object.Its dynamic behavior was analyzed by using LMS Virtual,Lab Motion and LMS Imagine.LGS extension/retraction system was dynamically simulated by Lab AMESim software.The influence of equivalent force was studied on LGS extension/retraction system,as well as for the characteristic of LGS`s dynamic movement and friction.The result shows that the LGS model can complete the action of extension and retraction on time under the condition of equivalent force,which has an obvious influence on the speed of LGS`s retraction and extension.