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航空学报  2015 

无伞末敏弹大攻角扫描运动稳定性分析

DOI: 10.7527/S1000-6893.2015.0051, PP. 3411-3417

Keywords: 末敏弹,灵巧弹药,大攻角,运动稳定性,圆运动,稳态扫描

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Abstract:

针对无伞末敏弹稳态扫描时做大攻角圆运动的特点,求取了其在一般形式赤道阻尼力矩作用下攻角方程的近似解析解。在此基础上,运用振幅平面法分析了此种情况下的运动稳定性。结果表明与在二次方赤道阻尼力矩作用下无伞末敏弹不可能形成稳定大攻角圆运动以实现稳态扫描不同,在考虑大攻角时赤道阻尼力矩不仅与攻角大小有关,还与攻角变化率有关,且章动阻尼与进动阻尼特性不同时,弹丸所受赤道阻尼力矩为一般形式的阻尼力矩情况下,无伞末敏弹可以形成稳定大攻角圆运动,并推导出了此种情况下实现稳态圆运动应满足的条件,给出了算例,为无伞末敏弹的结构设计和气动设计提供了理论参考。

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