摘要
采用自激励门限自回归分析方法,利用航空发动机环形燃烧室测试数据,得到燃烧室噪声声压时间信号自激励门限自回归仿真模型SETAR(2;1;15,14),并与控后非门限的自回归滑动平均模型ARMA(6,5)进行了比较,仿真结果表明,误差方差明显降低。
The self-excited threshold auto-regressive simulation model SETAR（2;1; 15,14） of the combustor acoustical pressure time signals was obtained by adopting the self-excited threshold auto-regressive analysis method and applying the experiment datum of the aeroengine annular combustor. The comparison of the simulation results between the model SETAR and the non-threshold auto-regressive slip average model ARMA （6,5） indicates that the error variance of the model SETAR is reduced obviously.
出处
《航空发动机》
2009年第1期40-42,共3页
Aeroengine
关键词
航空发动机
燃烧室噪声
时间信号
门限自回归仿真模型
滞后步长
准则
aeroengine
combustor noise
time signal
threshold autoregressive simulation model
hysteresis step
criterion
