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前缘缝翼机构为单自由度冗余驱动系统。工作中如果内外侧运动不协调就可能产生过大的阻力导致机构卡滞,进而影响飞机性能。为此,基于多个软件平台,建立了典型缝翼机构参数化的刚柔耦合虚拟样机,得到了缝翼机构在典型工况下受多因素耦合影响时的动态响应特性;分析了齿轮转速及几何尺寸不协调对缝翼收放的影响,得到了齿轮分度圆半径及齿轮转速的允许范围;最后以运动卡滞为典型失效模式,以齿轮转速和齿轮齿条分度圆半径为随机变量,采用蒙特卡罗法对其进行了可靠性及可靠性灵敏度分析,得到缝翼机构的运动卡滞可靠度和各设计变量对可靠度的归一化灵敏度。为缝翼的性能评估和进一步优化设计提供了参考。
The front slat mechanism is a single degree of freedom redundant drive system. If the work inside and outside the movement of uncoordinated may produce excessive resistance to cause the body stuck, thus affecting the aircraft performance. Therefore, based on multiple software platforms, a parametric rigid-flexible coupled virtual prototype of a typical slat-wing mechanism is established. The dynamic response characteristics of slat-wing mechanism under multi-factor coupling under typical working conditions are obtained. The influence of geometric inconsistency on the stowage of the slat, the radius of gear rounding and the allowable range of gear rotation speed are obtained. Finally, taking the motion jamming as the typical failure mode, the gear rotation speed and the gear rack pitch circle radius as the random variables , The reliability and reliability sensitivity of the slat mechanism were analyzed by Monte Carlo method. The reliability of the slack mechanism was obtained and the normalized sensitivity of each design variable to the reliability was obtained. It provides a reference for the performance evaluation and further optimization of the slat.