按阶次递推用F检验法判断模型阶次的算法 用模型计算出仿真数据，再按模型阶次递推算法的辨识方法，辨识模型的阶次和参数 -By order recursive F-test used to determine model order of the algorithm with the simulation data model, and then the recursive algorithm for model order identification method, identifica