LiTi3_2_3

代码说明：

  一个离散定常系统，参数结构已知，给定期望传递函数分母多项式，用极点配置方法设计系统，使系统输出无稳态误差(A discrete time-invariant systems, the parameter structure is known, given expectations of the transfer function denominator polynomial method of pole placement design system, the system output steady-state error)