线性系统传递函数的阶数辨识

在实际系统的参数辨识中，系统的结构往往并不知道，因此，要想正确辨识系统参数，就必须同时要辨识系统的阶数。该文根据线性系统的频域分析原理，讨论了包含有积分环节的线性连续时间系统的阶数辨识方法，并详细描述了线性系统阶数辨识的实现过程以及用Ｆ检验法来辨识模型结构的步骤与程序设计分析设计方法。实验结果表明，这种方法具有一定的辨识精度和工程应用价值。

The Order Discernment of Transfer Function for Linear System

When a practical system is discerned,its construction is often not known. Therefore,if the system parameters are to discern,the order of the system must be discerned at the same time.In the paper,according to analysis theory of linear system in the frequency domain,the discernment method of linear continuous time system is discussed, including integral link,and the implement procedure of order discernment of linear system,the steps of discerning model construction and the way of designing program with F test method. It has been made clear from the experiment result that the method has a certain discernment precision and engineering application value.