• 2022-06-06
    设开环系统传递函数为 ,则其频率特性的奈氏图与负实轴交点的频率值 ω= ( )
    A: 10 rad / s
    B: 0.5 rad / s
    C: 1 rad / s
    D: 0.1 rad / s
  • C

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    • 0

      开环传递函数为[img=188x50]180348eb8ec3326.png[/img],其近似直线的频率特性与0dB线交点处的频率为( )。 A: [img=23x25]180348eb985d9f7.png[/img]rad/s B: [img=14x25]180348eba2391c5.png[/img]rad/s C: [img=14x25]180348eba97a3b3.png[/img]rad/s D: [img=23x25]180348ebb13c9c9.png[/img]rad/s

    • 1

      设开环系统的传递函数为 G(s)= <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202105/82a60fbd103542c3b727561f5d5ba601.jpg" />,则其频率特性极坐标图与实轴交点的幅值 | G ( jω )|为 ( ) A: 1.0 B: 0.16 C: 0.8 D: 2.0

    • 2

      已知RLC并联电路中R=10 kΩ, L=1 mH, C=0.1μF。则谐振频率ω0为( ) A: 105 rad/s B: 102 rad/s C: 103 rad/s D: 10 rad/s

    • 3

      设开环系统频率特性为<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202108/d21a2327c99e49bd91ca22b052cbc0f6.png" />,则其频率特性的奈奎斯特图与负实轴交点的频率值<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202108/546cb297f51b4696b551151788da00a3.png" />为( )。 A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202108/2007ab8a0021434b957556551bd9732d.png" /> B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202108/2bbfd664c7ac40ad8014f612a59d6089.png" /> C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202108/d30f9a3762d343d482c800ed0ef47e7c.png" /> D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202108/5d17685250a34b2d8bd65e8b02b4325a.png" />

    • 4

      设<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202105/54986715cd654d919e5c826596feeaea.png" />为系统开环传递函数,取复平面上的任一点s,当( )情况下,s为系统180度根轨迹上的点。 A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202105/07552f7e441941c7b44f88ba5d438968.png" /> B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202105/5c329e39955e4876ad35b10e470b2aca.png" /> C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202105/dbe82017a7294e8095ea34098760c789.png" /> D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202105/ac8c0cbd33364bdbb9ae8309512dd429.png" />