仿真实验:采样周期与采样效果 60 s2+2s+40 Step Scope Transfer Fcn Clock To workspace Zero-Order Scope1 Hold 零阶保持器取采样周期为T=0.1,04,0.8 1010 仿真实验：采样周期与采样效果 零阶保持器取采样周期为 T= 0.1，0.4，0.8