论文部分内容阅读
提出了涡扇发动机喘振实时模型建立方法,该模型考虑了发动机容腔的容积动力学效应,风扇、压气机的失速区特性,燃烧室的熄火特性,同时建立了发动机进口总温畸变、总压畸变及组合畸变模型;提出了一种基于压力相关度测量的发动机主动稳定性控制技术,通过测量压气机转子叶片尖端区域的压力相关度,得到相关度值穿越阈值的次数,根据穿越阈值次数与喘振裕度值固有的特性关系,得到压气机的喘振裕度,进而通过鲁棒控制方法设计了主动稳定性控制律,并进行了仿真研究,结果表明:相比于常规控制,基于压力相关度测量主动稳定性控制可以实现发动机过渡态过程中压缩系统不进喘,明显提高了发动机过渡态的动态性能.
A real-time surge model establishment method for turbofan engine is proposed. The model takes into account the volumetric kinetic effect of the engine volume, the characteristics of the fan, the stall area of the compressor and the flameout characteristics of the combustion chamber. At the same time, Pressure distortion and combination distortion model. A new active stability control technology based on pressure correlation measurement is proposed. By measuring the pressure dependence of the tip region of the compressor rotor blade, the number of times the correlation value crosses the threshold is obtained. And the inherent characteristic of the surge margin value, the surge margin of the compressor is obtained, then the active stability control law is designed by the robust control method, and the simulation study is carried out. The results show that compared with the conventional control, Pressure-dependent measurement of active stability control can be achieved during the transient state of the engine compression system does not enter the gas, significantly improve the dynamic performance of the engine transition state.