基于粗糙基的高超声速进气道起动／不起动分类方法研究

进气道起动／不起动状态检测是高超声速进气道研究的重要内容，它是进气道保护控制的基础和前提。针对这一问题，对高超声速进气道进行了不同边界条件下的二维稳态流场数值模拟。提出了利用粗糙集方法对进气道的测点进行约简处理，得到了进气道起动／不起动的分类准则，对分类准则进行了内在的物理机制分析，并利用其它工况数据对判断准则进行了验证。验证结果表明了分类准则的正确性。

Classification Methods of Hypersonic Inlet Start/Unstart Based on Rough Set

Inlet start/unstart detection is one of the most important issues of hypersonic inlet and is also the foundation of inlet protection control. To solve this problem, the 2-D inner steady flow of hypersonic inlet at different flow conditions and back pressures was numerically simulated. The sensor location reduction to the inlet by using rough set algorithm was presented. The judgment criterion of hypersonic inlet start/unstart was given and the inner physical mechanism was analyzed. The judgment criterion was validated by the else simulation data, the result proves the validity.