[color=#000000]已知系统开环传递函数[/color][color=#000000][tex=12.5x2.643]OiD/WeuvSQeKQO2HptiEaDdM02RK6jMm3oCRRgkKAF/gSdNbOvhXfVxfrLOLEJb/[/tex][/color][color=#000000][color=#000000]试分别绘制[/color][color=#000000][/color][tex=5.214x1.214]3NyO5fXhXB6aoyp/Kcg3Dw==[/tex][color=#000000][/color][color=#000000]时系统的概略开环幅相曲线。[/color][/color]