把待辨识的过程看作“黑箱”，它只考虑过程的输入输出特性，而不强调过程的内部机理，用递推最小二乘估计算法对系统参数进行辨识-Process to be identified as a " black box" , it considers only the input and output characteristics of the process, rather than emphasis on the internal mechanism of the process, to identify the system parameters using recursive least squares estimation algorithm