某型发动机高原起动过程数学模型建立

Establishment of a Certain Aero-Engine Starting Mathematical Model in Plateau Regions

针对某型发动机高原起动过程具有危险性大和变化规律复杂的特点,提出了一种变记忆长度的小波变换多分辨分析方法。该方法将辨识的数据分解到不同频段,然后针对各不同频段采用不同的记忆长度进行辨识,从而可以建立起该型发动机高原起动过程的数学模型,为高原起动试验提供理论参考。

The starting of a certain aero-engine in plateau regions has been very dangerous and complex. In order to establish its mathematical model, this paper presents an improved variable memory length algorithm based on wavelet transform multi-resolution analysis method. This method decomposes data into different frequency segments, in which different memory lengths are used to identify parameters. The starting model can thus be thus formulated, which provides theoretical reference for starting test in plateau regions.