中文摘要：

针对输入非线性系统存在两个未知参数集乘积项,导致模型参数不可辨识的情况,采用规范化系统参数方法来分离关键变量,提出了最小二乘迭代参数估计算法,来辨识输入非线性受控自回归系统的参数.仿真结果验证了其有效性.

英文摘要：

There exists the product of two unknown parameter sets in input nonlinear systems.Thus,the model parameters are unidentifiable.By normalizing the system parameters and using key variable separation,a least squares-based iterative algorithm is proposed to identify input nonlinear controlled autoregressive systems.The proposed algorithm is verified by simulation examples.