The problem of discrete-time model identification of industrial processes with time delay was investigated.An iterative and separable method is proposed to solve this problem,that is,the rational transfer function mod...The problem of discrete-time model identification of industrial processes with time delay was investigated.An iterative and separable method is proposed to solve this problem,that is,the rational transfer function model parameters and time delay are alternately fixed to estimate each other.The instrumental variable technique is applied to guarantee consistent estimation against measurement noise.A noteworthy merit of the proposed method is that it can handle fractional time delay estimation,compared to existing methods commonly assuming that the time delay is an integer multiple of the sampling interval.The identifiability analysis for time delay is addressed and correspondingly,some guidelines are provided for practical implementation of the proposed method.Numerical and experimental examples are presented to illustrate the effectiveness of the proposed method.展开更多
借助于偏差补偿原理和预滤波思想,推导了有色噪声干扰输出误差系统参数估计的偏差补偿递推最小二乘(Bias compensation recursive least squares,BCRLS)辨识方法.该方法降低了辨识对输入信号平稳性的要求,实现了偏差补偿方法参数估计的...借助于偏差补偿原理和预滤波思想,推导了有色噪声干扰输出误差系统参数估计的偏差补偿递推最小二乘(Bias compensation recursive least squares,BCRLS)辨识方法.该方法降低了辨识对输入信号平稳性的要求,实现了偏差补偿方法参数估计的递推计算,可以用于在线辨识.提出的递推BCRLS辨识方法优于非递推偏差补偿最小二乘算法,提高了参数估计精度.仿真试验证实了算法的有效性.展开更多
文摘The problem of discrete-time model identification of industrial processes with time delay was investigated.An iterative and separable method is proposed to solve this problem,that is,the rational transfer function model parameters and time delay are alternately fixed to estimate each other.The instrumental variable technique is applied to guarantee consistent estimation against measurement noise.A noteworthy merit of the proposed method is that it can handle fractional time delay estimation,compared to existing methods commonly assuming that the time delay is an integer multiple of the sampling interval.The identifiability analysis for time delay is addressed and correspondingly,some guidelines are provided for practical implementation of the proposed method.Numerical and experimental examples are presented to illustrate the effectiveness of the proposed method.
文摘借助于偏差补偿原理和预滤波思想,推导了有色噪声干扰输出误差系统参数估计的偏差补偿递推最小二乘(Bias compensation recursive least squares,BCRLS)辨识方法.该方法降低了辨识对输入信号平稳性的要求,实现了偏差补偿方法参数估计的递推计算,可以用于在线辨识.提出的递推BCRLS辨识方法优于非递推偏差补偿最小二乘算法,提高了参数估计精度.仿真试验证实了算法的有效性.
