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针对液压模型动态仿真过程复杂、计算量大的问题,研究了航空发动机主燃油执行机构的实时建模技术。利用活性能量指数分析对航空发动机主燃油执行机构数学模型进行了化简,保留了系统的主要动态环节;以模型常微分方程组的刚性分析结果为依据调整了模型参数,使其特征值满足定步长计算的收敛要求;结合实时仿真平台完成了模型的性能仿真验证。仿真结果表明,所建立的数学模型提高了计算效率,能够满足航空发动机控制系统的实时性与精度性要求。
Aimed at the complex and computationally intensive dynamic simulation process of hydraulic model, the real-time modeling technology of the main fuel actuator of aeroengine was studied. Using the active energy index analysis, the mathematical model of the main fuel engine of aeroengine is simplified and the main dynamic aspects of the system are preserved. The model parameters are adjusted based on the rigid analysis results of the ordinary differential equations of the model to make the eigenvalues satisfy Step calculation of the convergence requirements; combined with real-time simulation platform to complete the model performance simulation. Simulation results show that the established mathematical model can improve computational efficiency and meet the requirements of real-time and accuracy of aero-engine control system.