系统辨识中，递推最小二乘估计（RLS）是辨识模型阶次的一个重要的算法。该程序通过实现该算法，得到模型阶次的估计值以及相关参数值。-system identification, recursive least squares estimation (RLS) identification model is of the order of an important algorithm. The program through the realization of the algorithm, to be model order and the estimated value of the relevant parameters.