航空发动机环形燃烧室噪声总声级的GMDH方法研究

GMDH method study on annular combustor noise total sound level of aircraft engine

采用数据处理的组合方法(GMDH),研究航空发动机环形燃烧室测试数据。通过简单的二元二次回归原理来构造出下一代较为复杂的次级回归方程,并且利用"优选原理"淘汰掉次级回归方程中的那些不理想的项,得到燃烧室噪声总声级的高阶方程,获得较客观的描写复杂非线性系统的非线性模式。

We studied the total sound pressure level test data in an annular combustion chamber of aircraft engine by Grop Method of Data Handing（GMDH）.Secondary regression equations of the latter generation and quite complex are constructed through simple binary quadratic regression principle and the total noise sound level equation in annular combuster of an aircraft engine is obtained giving a quite objective description of nonlinear modulating of complex nonlinear system using optimum seeking principle to clean L those non - ideal terms in secondary regression equations, out.