Nyquist Diagram Real Ax 图5-26积分因子极坐标图 Nyquist Diagram Real Axis 图5-27微分因子极坐标图128 Nyquist Diagram Real Axis Imaginary Axis -3 -2 -1 0 1 2 3 -5 -4.5 -4 -3.5 -3 -2.5 -2 -1.5 -1 -0.5 0 图 5-26 积分因子极坐标图 Nyquist Diagram Real Axis Imaginary Axis -3 -2 -1 0 1 2 3 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 图 5-27 微分因子极坐标图