航空发动机VSV作动系统多物理场耦合建模与故障影响分析
Multiple Physical Field Coupling Modeling and Failure Effect Analysis of Aero-Engine VSV Actuating System

为了准确分析航空发动机高压压气机可调静子(Variable Stator Vane, VSV)液压调节机构故障对作动系统测量参数的影响，基于Matlab及Modelica语言建立了VSV液压作动系统的机–电–液多物理场耦合的联合仿真系统模型，在此基础上，开发了液压作动系统故障注入与分析工具，研究了电液伺服阀、作动筒、传感器等故障模式对作动系统的影响，影响分析表明，不同故障类型及故障等级对作动系统的测量参数影响具有明显的特征变化规律，为进一步建立航空发动机机载模型及基于模型与数据的故障诊断研究奠定了基础。
In order to accurately analyze the fault impact of the hydraulic actuating system of variable stator vane (VSV) aero engine high-pressure compressor, the multiple physical field coupling of mechanical-electro-hydraulic for VSV actuating system based on Matlab and Modelica is constructed. The fault injection and analysis tool are developed based on the coupling model in this paper. The different fault modes of electro-hydraulic servo valve, actuator cylinder and sensors are injected to the VSV actuating system and the fault impact is researched. The result shows that the system has the distinct fault impact characteristics law and this can provide a foundation for the on-board modeling of aero engine and fault diagnosis based on model and data methods.