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针对航空发动机非线性模型将作为未来机载应用而需要严格实时性的问题,研究了求解模型的迭代方法,综述其历史发展情况,并讨论收敛性问题,同时提出一种改进应用方案,即模型在过渡态仿真时可将上一状态点雅可比矩阵直接应用于下一点计算,能够在典型应用方案基础上直接减少气动热力模型计算次数,从而提高整体模型执行效率.通过实际算例对这些应用方案进行仿真比较与分析,结果表明:①Broy-den秩1法执行效率最高,更适宜用于模型实时计算;②改进应用方案简单、有效,为进一步满足非线性模型的严格实时性要求奠定基础.
Aero-engine nonlinear model will be used as the future real-time on-board applications require real-time issues, research iterative method to solve the model, review its historical development, and discuss the convergence problem, and propose an improved application, that is, the model In the transition state simulation, the Jacobian matrix of the previous state point can be directly applied to the next point calculation, which can directly reduce the calculation times of the aerodynamic model based on the typical application scheme, so as to improve the execution efficiency of the overall model.Through practical examples, The results show that: ①Broy-den rank-1 method has the highest execution efficiency and is more suitable for real-time calculation; ②The improved application scheme is simple and effective, which lays the foundation for further meeting the strict real-time requirements of nonlinear model.