基于数据的发动机模型匹配方法研究

针对在使用环境条件下发动机部件特性未知的问题,为获得在实际装机条件下的发动机部件特性,采用1种基于参考数据的发动机部件级模型匹配方法,在对测量数据和模型特征分析的基础上,选取适当调整参数,以模型在非设计点的仿真输出与参考数据的匹配精度为目标,通过迭代方法求解部件特性。仿真数据表明:采用基于数据的发动机匹配技术得到的发动机模型,其仿真输出与参考数据的偏差均在允许范围内。利用该方法可以得到在使用条件下的发动机部件特性,为装机状态发动机的仿真预测提供技术支撑。

Research on Matching Method of Engine Model based on Test Data

In view of the problem of unknown components at service condition, an adapting method based on the rig data was proposedto obtain the characteristics of the engine components under the actual condition. Adjustment parameters were selected based on theanalysis of model characteristics and test data. The error of model simulation and test data was selected as objective function and used initerative algorithm for component characteristics. The simulation results show that the error between the model simulation which derivedfrom the method and test data is within the maximum error. The components characteristics was obtained by using the engine matchingtechnology based on the test data, which provide support for engine simulation and prediction under the actual condition.