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缓冲性能是气垫式起落系统的一个重要功能,基于以某型地效飞行器为背景的气垫式起落系统方案设计,建立了气垫式起落系统落震仿真模型.利用有限元理论和LS-DYNA仿真平台对气垫式起落系统缓冲性能进行仿真分析.结果表明气垫式起落系统在落震过程中未出现反弹,气囊最大压缩位移为1.015 m,小于允许最大压缩位移1.502 m;整个落震过程出现的最大过载为2.87 g,小于允许最大过载3 g.验证了气垫式起落系统在落震过程中缓冲行程及缓冲性能满足要求. 相似文献
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介绍了Y12Ⅳ型飞机短距起飞、着陆性能飞行试验的参数测试和数据处理方法。对测试参数在数据处理中的作用和对测试结果的影响进行了分析。从保证数据处理结果满足适航相关性要求的角度,对重要参数的测试精度和采样率提出要求,并对测试方法提出了改进措施。 相似文献
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GA-Based Model Predictive Control of Semi-Active Landing Gear 总被引:1,自引:1,他引:0
WU Dong-su GU Hong-bin LIU Hui 《中国航空学报》2007,20(1):47-54
Semi-active landing gear can provide good performance of both landing impact and taxi situation, and has the ability for adapting to various ground conditions and operational conditions. A kind of Nonlinear Model Predictive Control algorithm (NMPC) for semi-active landing gears is developed in this paper. The NMPC algorithm uses Genetic Algorithm (GA) as the optimization technique and chooses damping performance of landing gear at touch down to be the optimization object. The valve's rate and magnitude limitations are also considered in the controller's design. A simulation model is built for the semi-active landing gear's damping process at touchdown. Drop tests are carried out on an experimental passive landing gear systerm to validate the parameters of the simulation model. The result of numerical simulation shows that the isolation of impact load at touchdown can be significantly improved compared to other control algorithms. The strongly nonlinear dynamics of semi-active landing gear coupled with control valve's rate and magnitude limitations are handled well with the proposed controller. 相似文献
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在飞机附件维修从单一送修向按小时付费包修模式(TCS)转变的背景下,提出以平均故障间隔时间(MTBF)作为衡量飞机维修可靠性的关键指标,从实际维修角度出发采取有效措施可以降低起落装置的故障率,提升起落装置的可靠性。 相似文献