3.已知某闭环系统的开环传递函数为<img src="https://up.zaixiankaoshi.com/1334052/question/d2cdc62db5531f24d2665c11d636e4af.png" alt="d2cdc62db5531f24d2665c11d636e4af.png">,则当<img src="https://up.zaixiankaoshi.com/1334052/question/62ff47235d65de911767434f7d8abe69.png" alt="62ff47235d65de911767434f7d8abe69.png">时,该系统的Nyquist曲线的相位角 ( )
A、
B、
C、
D、
发布时间:2025-07-12 14:06:51