涡扇发动机防喘控制系统的动态数学模型和数字仿真

本文以某涡扇发动机防喘控制系统为对象,建立了该系统的动态数学模型,并通过数字计算机进行仿真。判明了系统中主要结构参数和两个典型非线性对动态性能的影响。提出了改善系统品质的途径。

A DYNAMICAL MATHEMATICAL MODEL AND DIGITAL SIMULATION FOR ANTI-SURGE CONTROL SYSTEM OF A TURBOFAN ENGINE

An anti-surge control system of a certain turbofan engine is taken as an object,the dynamical mathematical model of this system has been developed and the simulation has been done on a digital computer. In the first step of the simulation the linear system is studied and the dynamical performances are calculated under four conditions,thereby the main influencing parameters of the dynamical performances are obtained. In the second step,the effects of nonlinearities of the dead-region and the backlash on the dynamical performances are studied. The digital simulation results indicate that the effects of two nonlinearities on the performances are opposite. The former enhances the relative stability of the system, but the latter reduces that. Both effects appear not to be in agreement with the superposition principle. Finally, the ways of improving the quality of the system are presented based on the results of the calculations.