在各种降阶法中,基于求误差极小的方法(所谓最优化法),能够获得较好的动态拟合,一般能保证系统的稳定性。又便于实现计算机辅助设计(CAD)。近年来,经过数位学者的进一步发展,已日趋完善。笔者在综合了现有算法的基础上,编制了一个实用性软件包。适用于单变量系统和多变量系统,可作为理论研究和工程设计的一种工具。 In various reduction methods, based on the method of minimizing the error (the so-called optimization method), a better dynamic fit can be obtained, which generally ensures the stability of the system. And easy to implement computer-aided design (CAD). In recent years, after the further development of several scholars, it has been perfected day by day. On the basis of synthesizing the existing algorithms, the author has compiled a practical software package. Suitable for univariate and multivariable systems as a tool for theoretical research and engineering design.