Abstract: For the requirement of establishing specific system dynamic model in the fields of adaptive control and failure monitor of advance aero engine, the algorithm with given state variable was proposed and derived, which was based on numerical algorithm for subspace state space system identification(N4SID). At last, this method was applied to identify aero thermal model of a certain double spool turbojet aero engine and the result shows that it is feasible.

Key words: Aircraft engine;Subspace state space method;Dynamic model;System identification

摘要： 针对现代航空发动机的自适应控制和故障监控领域建立物理意义明确的系统动态模型的需要 ,基于数字子空间状态空间系统辨识 (N4SID)方法 ,提出并推导了指定状态变量的子空间辨识方法 ,并在某型双转子涡喷发动机气动热力学模型上进行了仿真实验 ,说明通过指定状态变量的子空间辨识方法可以得到较好的辨识结果

关键词: 航空发动机;子空间状态空间法;动态模型;系统识别