控制系统的BODE图校正，未校正的Bode图与频域性能指标，超前校正（方法一）的Bode图与频域性能指标，超前校正（方法二）的Bode图与频域性能指标-BODE diagram of control system calibration, uncorrected Bode plot and frequency domain performance, ahead of the correction (a) Bode plot and frequency domain performance spe