二階系統(tǒng)在單位階躍信號(hào)作用下當(dāng)時(shí)輸出為。()
A.諧振峰值Mr B.相位裕量γ C.增益裕量Kg D.剪切頻率ωc
A.-60(dB/dec) B.-40(dB/dec) C.-20(dB/dec) D.0(dB/dec)