Abstract
火炮自动装填系统的主要功能是将弹丸和发射药高效、精确、可靠地输送入炮膛，其中火炮协调器是自动装填系统中典型的转运执行机构，需要较高的定位精度来确保弹药以给定的射角准确入膛，准确高效的评估协调器定位精度可靠性具有重要意义。本文旨在发展一种可有效的评估火炮协调器定位精度可靠性的实用分析方法，首先建立含间隙的火炮协调器刚柔耦合动力学模型，并基于前馈神经网络构建其响应的近似模型；在此基础上，利用协调器到位极限状态函数的最大可能失效点处的二阶信息，构造极限状态函数的二次逼近函数；最后，运用二阶鞍点逼近方法评估了火炮协调器定位精度可靠性。工程算例表明，本文提出的方法能够很好的平衡协调器可靠性分析中的精度和效率。同时，协调器定位精度可靠性分析结果表明，间隙以及结构柔性因素对于火炮协调器定位精度具有重要影响，需要在协调器设计时加以考虑和优化.
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