成考院校在线答案
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2022-09-12
[单选] <p class="MsoNormal" style="margin-top:15.6pt;mso-para-margin-top:1.0gd">35、<span style="mso-bidi-font-size:10.5pt;font-family:黑体">开环系统与闭环系统<span class="GramE">最</span>本质的区别是 （ <span lang="EN-US"><span style="mso-spacerun:yes"> </span></span>）。<span lang="EN-US"> <o:p></o:p></span></span></p>
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2022-09-12
[单选] <p class="MsoNormal" style="margin-top:15.6pt;mso-para-margin-top:1.0gd">36、<span style="mso-bidi-font-size:10.5pt;font-family:黑体">单位反馈控制系统的开环传递函数<span lang="EN-US"><sub> <!--[if gte vml 1]><v:shape id="_x0000_i1053" type="#_x0000_t75" style='width:62.25pt;height:29.25pt' o:ole=""> <v:imagedata src="JXGCKZJC%202.files/image053.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="83" height="39" v:shapes="_x0000_i1053" src="http://wljy.whut.edu.cn:80/uploadfiles/word/JXGCKZJC%202.files/image054.gif"> <!--[endif]--></sub> <!--[if gte mso 9]><xml _tmplitem="6" > <o:OLEObject Type="Embed" ProgID="Equation.3" ShapeID="_x0000_i1053" DrawAspect="Content" ObjectID="_1672753033"> </o:OLEObject> </xml><![endif]--></span>，则其闭环传递函数为（ <span lang="EN-US"><span style="mso-spacerun:yes"> </span></span>）。 <span lang="EN-US"> <o:p></o:p></span></span></p>
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2022-09-12
[单选] <p class="MsoNormal">23、<span style="mso-bidi-font-size:10.5pt;font-family:黑体">某<span class="GramE">象</span>函数<span lang="EN-US"><sub> <!--[if gte vml 1]><v:shape id="_x0000_i1033" type="#_x0000_t75" style='width:41.25pt;height:27pt' o:ole=""> <v:imagedata src="JXGCKZJC%204.files/image017.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="55" height="36" v:shapes="_x0000_i1033" src="http://wljy.whut.edu.cn:80/uploadfiles/word/JXGCKZJC%204.files/image018.gif"> <!--[endif]--></sub> <!--[if gte mso 9]><xml _tmplitem="6" > <o:OLEObject Type="Embed" ProgID="Equation.3" ShapeID="_x0000_i1033" DrawAspect="Content" ObjectID="_1672753568"> </o:OLEObject> </xml><![endif]--></span>，其原函数<span lang="EN-US"><sub> <!--[if gte vml 1]><v:shape id="_x0000_i1034" type="#_x0000_t75" style='width:27pt;height:13.5pt' o:ole=""> <v:imagedata src="JXGCKZJC%204.files/image019.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="36" height="18" v:shapes="_x0000_i1034" src="http://wljy.whut.edu.cn:80/uploadfiles/word/JXGCKZJC%204.files/image020.gif"> <!--[endif]--></sub> <!--[if gte mso 9]><xml _tmplitem="6" > <o:OLEObject Type="Embed" ProgID="Equation.3" ShapeID="_x0000_i1034" DrawAspect="Content" ObjectID="_1672753569"> </o:OLEObject> </xml><![endif]--> </span>（ <span lang="EN-US"><span style="mso-spacerun:yes"> </span></span>）。<span lang="EN-US"> <o:p></o:p></span></span></p>
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2022-09-12
[单选] <p class="MsoNormal" align="left" style="text-align:left">38、<span style="mso-bidi-font-size: 10.5pt;font-family:黑体">下列校正方式中，哪种方式是相位滞后校正？（ <span lang="EN-US"><span style="mso-spacerun:yes"> </span></span>）<span lang="EN-US"> <o:p></o:p></span></span></p>
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2022-09-12
[单选] <p class="MsoNormal">39、<span style="mso-bidi-font-size:10.5pt;font-family:黑体">频域分析法研究自动控制系统时，最常用的典型输入信号是（ <span lang="EN-US"><span style="mso-spacerun:yes"> </span></span>）。<span lang="EN-US"> <o:p></o:p></span></span></p>
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2022-09-12
[单选] <p class="MsoNormal">38、<span style="mso-bidi-font-size:10.5pt;font-family:黑体">某系统的传递函数为<span lang="EN-US"><sub> <!--[if gte vml 1]><v:shape id="_x0000_i1040" type="#_x0000_t75" style='width:53.25pt;height:26.25pt' o:ole=""> <v:imagedata src="JXGCKZJC%206.files/image030.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="71" height="35" v:shapes="_x0000_i1040" src="http://wljy.whut.edu.cn:80/uploadfiles/word/JXGCKZJC%206.files/image031.gif"> <!--[endif]--></sub> <!--[if gte mso 9]><xml _tmplitem="6" > <o:OLEObject Type="Embed" ProgID="Equation.3" ShapeID="_x0000_i1040" DrawAspect="Content" ObjectID="_1672754227"> </o:OLEObject> </xml><![endif]--></span>，则其频率特性的幅频特性为（ <span lang="EN-US"><span style="mso-spacerun:yes"> </span></span>）。<span lang="EN-US"><span style="mso-spacerun:yes"> </span> <o:p></o:p></span></span></p>
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2022-09-12
[多选] <p class="MsoNormal">1、<span style="mso-bidi-font-size:10.5pt;font-family:黑体">在<span lang="EN-US">Nyquist</span>图（极坐标图）和<span lang="EN-US">Bode</span>图（对数坐标图）的对应关系中，以下说法正确的是（<span lang="EN-US"><span style="mso-spacerun:yes"> </span></span>）。<span lang="EN-US"> <o:p></o:p></span></span></p>
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2022-09-12
[多选] <p class="MsoNormal">2、<span style="font-size:12.0pt;font-family:黑体">在极坐标图（<span lang="EN-US">Nyquist</span>图）上，曲线与正虚轴的交点处的坐标为（<i style="mso-bidi-font-style: normal"><span lang="EN-US">a</span></i>，<span lang="EN-US">j<i style="mso-bidi-font-style: normal">b</i></span>），此时（<span lang="EN-US"><span style="mso-spacerun:yes"> </span></span>）。<span lang="EN-US"> <o:p></o:p></span></span></p>
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2022-09-12
[多选] <p class="MsoNormal">6、<span style="mso-bidi-font-size:10.5pt;font-family:黑体">增大欠阻尼二阶系统的无阻尼自由振荡频率<span lang="EN-US" style="mso-bidi-font-weight:bold"><sub> <!--[if gte vml 1]><v:shape id="_x0000_i1054" type="#_x0000_t75" style='width:15pt;height:17.25pt' o:ole=""> <v:imagedata src="JXGCKZJC%201.files/image059.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="20" height="23" v:shapes="_x0000_i1054" src="http://wljy.whut.edu.cn:80/uploadfiles/word/JXGCKZJC%201.files/image060.gif"> <!--[endif]--></sub> <!--[if gte mso 9]><xml _tmplitem="4" > <o:OLEObject Type="Embed" ProgID="Equation.3" ShapeID="_x0000_i1054" DrawAspect="Content" ObjectID="_1672752757"> </o:OLEObject> </xml><![endif]--></span><span style="mso-bidi-font-weight:bold">，能够（ <span lang="EN-US"><span style="mso-spacerun:yes"> </span></span>）。</span><span lang="EN-US"> <o:p></o:p></span></span></p>
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2022-09-12
[多选] <p class="MsoNormal">8、<span style="mso-bidi-font-size:10.5pt;font-family:黑体">图<span lang="EN-US">1</span></span> <!--[if gte vml 1]><v:group id="_x0000_s1542" style='position:absolute;left:0;text-align:left;margin-left:197.6pt; margin-top:5.45pt;width:209.35pt;height:60.9pt;z-index:251656192; mso-position-horizontal-relative:text;mso-position-vertical-relative:text' coordorigin="2658,10004" coordsize="4187,1218"> <v:rect id="_x0000_s1518" style='position:absolute;left:2766;top:10683; width:88;height:271' filled="f" stroked="f"> <v:textbox style='mso-next-textbox:#_x0000_s1518' inset="0,0,0,0"> <![if !mso]> <table _tmplitem="4" cellpadding=0 cellspacing=0 width="100%"> <tr _tmplitem="4" > <td _tmplitem="4" ><![endif]> <div _tmplitem="4" > <p _tmplitem="4" class=MsoNormal><span _tmplitem="4" lang=EN-US style='font-size:9.0pt;color:black'>0</span><span _tmplitem="4" lang=EN-US style='font-size:9.0pt'><o:p></o:p></span></p> </div> <![if !mso]></td> </tr> </table> <![endif]></v:textbox> </v:rect><v:rect id="_x0000_s1519" style='position:absolute;left:2658;top:10104; width:242;height:212' filled="f" stroked="f"> <v:textbox style='mso-next-textbox:#_x0000_s1519' inset="0,0,0,0"> <![if !mso]> <table _tmplitem="4" cellpadding=0 cellspacing=0 width="100%"> <tr _tmplitem="4" > <td _tmplitem="4" ><![endif]> <div _tmplitem="4" > <p _tmplitem="4" class=MsoNormal><span _tmplitem="4" lang=EN-US style='font-size:9.0pt;color:black'>20</span><span _tmplitem="4" lang=EN-US style='font-size:9.0pt'><o:p></o:p></span></p> </div> <![if !mso]></td> </tr> </table> <![endif]></v:textbox> </v:rect><v:line id="_x0000_s1520" style='position:absolute' from="4064,10245" to="4064,10858" strokeweight=".25pt"> <v:stroke dashstyle="longDash"></v:stroke> </v:line><v:line id="_x0000_s1521" style='position:absolute' from="2890,10819" to="6688,10819" strokeweight=".5pt"> <v:stroke startarrowwidth="narrow" startarrowlength="long" endarrow="classic" endarrowwidth="narrow" endarrowlength="long" endcap="round"></v:stroke> </v:line><v:shape id="_x0000_s1522" type="#_x0000_t75" style='position:absolute; left:6688;top:10720;width:157;height:150'> <v:imagedata src="JXGCKZJC%203.files/image027.wmz" o:title=""></v:imagedata> </v:shape><v:shape id="_x0000_s1523" type="#_x0000_t75" style='position:absolute; left:2914;top:10004;width:539;height:183'> <v:imagedata src="JXGCKZJC%203.files/image028.wmz" o:title=""></v:imagedata> </v:shape><v:line id="_x0000_s1524" style='position:absolute;rotation:-90' from="2474,10429" to="3324,10429" strokeweight=".5pt"> <v:stroke startarrowwidth="narrow" startarrowlength="long" endarrow="classic" endarrowwidth="narrow" endarrowlength="long" endcap="round"></v:stroke> </v:line><v:line id="_x0000_s1525" style='position:absolute' from="4032,10246" to="5169,10462" strokeweight="1pt"></v:line> <v:line id="_x0000_s1526" style='position:absolute' from="5159,10457" to="6565,10996" strokeweight="1pt"></v:line> <v:line id="_x0000_s1528" style='position:absolute' from="6349,10819" to="6349,11088" strokeweight=".25pt"> <v:stroke dashstyle="longDash"></v:stroke> </v:line><v:shape id="_x0000_s1529" type="#_x0000_t75" style='position:absolute; left:4025;top:10847;width:94;height:181'> <v:imagedata src="JXGCKZJC%203.files/image029.wmz" o:title=""></v:imagedata> </v:shape><v:shape id="_x0000_s1530" type="#_x0000_t75" style='position:absolute; left:6225;top:10636;width:234;height:169'> <v:imagedata src="JXGCKZJC%203.files/image030.wmz" o:title=""></v:imagedata> </v:shape><v:shape id="_x0000_s1531" type="#_x0000_t75" style='position:absolute; left:4439;top:10119;width:350;height:201'> <v:imagedata src="JXGCKZJC%203.files/image031.wmz" o:title=""></v:imagedata> </v:shape><v:shape id="_x0000_s1534" type="#_x0000_t75" style='position:absolute; left:5079;top:10845;width:180;height:186'> <v:imagedata src="JXGCKZJC%203.files/image032.wmz" o:title=""></v:imagedata> </v:shape><v:line id="_x0000_s1535" style='position:absolute' from="5185,10720" to="5185,10833" strokeweight=".25pt"> <v:stroke dashstyle="longDash"></v:stroke> </v:line><v:shapetype id="_x0000_t202" coordsize="21600,21600" o:spt="202" path="m,l,21600r21600,l21600,xe"> <v:stroke joinstyle="miter"></v:stroke> <v:path gradientshapeok="t" o:connecttype="rect"></v:path> </v:shapetype><v:shape id="_x0000_s1536" type="#_x0000_t202" style='position:absolute; left:4560;top:10992;width:350;height:230' filled="f" stroked="f" strokecolor="white"> <v:textbox style='mso-next-textbox:#_x0000_s1536' inset="0,0,0,0"> <![if !mso]> <table _tmplitem="4" cellpadding=0 cellspacing=0 width="100%"> <tr _tmplitem="4" > <td _tmplitem="4" ><![endif]> <div _tmplitem="4" > <p _tmplitem="4" class=MsoNormal style='mso-layout-grid-align:none;text-autospace: none'><span _tmplitem="4" style='font-size:9.0pt;font-family:Microsoft Yahei;mso-ascii-font-family: "Times New Roman";mso-hansi-font-family:"Times New Roman";mso-bidi-font-family: 宋体;color:black;mso-ansi-language:ZH-CN;mso-bidi-font-style:italic'>图</span><span _tmplitem="4" style='font-size:9.0pt;mso-bidi-font-family:Microsoft Yahei;color:black;mso-ansi-language: ZH-CN;mso-bidi-font-style:italic'>1</span><span _tmplitem="4" lang=EN-US style='font-size:9.0pt;font-family:"Arial",sans-serif;mso-bidi-font-family: 宋体;color:black'><o:p></o:p></span></p> </div> <![if !mso]></td> </tr> </table> <![endif]></v:textbox> </v:shape><v:line id="_x0000_s1537" style='position:absolute' from="2906,10250" to="4022,10250" strokeweight="1pt"></v:line> <v:shape id="_x0000_s1538" type="#_x0000_t75" style='position:absolute; left:5689;top:10435;width:350;height:201'> <v:imagedata src="JXGCKZJC%203.files/image033.wmz" o:title=""></v:imagedata> </v:shape><v:line id="_x0000_s1541" style='position:absolute' from="5179,10432" to="5179,10829" strokeweight=".25pt"> <v:stroke dashstyle="longDash"></v:stroke> </v:line><w:wrap type="square"></w:wrap> </v:group><![if gte mso 9]><o:OLEObject Type="Embed" ProgID="Equation.3" ShapeID="_x0000_s1522" DrawAspect="Content" ObjectID="_1672753336"> </o:OLEObject> <![endif]><![if gte mso 9]><o:OLEObject Type="Embed" ProgID="Equation.3" ShapeID="_x0000_s1523" DrawAspect="Content" ObjectID="_1672753337"> </o:OLEObject> <![endif]><![if gte mso 9]><o:OLEObject Type="Embed" ProgID="Equation.3" ShapeID="_x0000_s1529" DrawAspect="Content" ObjectID="_1672753338"> </o:OLEObject> <![endif]><![if gte mso 9]><o:OLEObject Type="Embed" ProgID="Equation.3" ShapeID="_x0000_s1530" DrawAspect="Content" ObjectID="_1672753339"> </o:OLEObject> <![endif]><![if gte mso 9]><o:OLEObject Type="Embed" ProgID="Equation.3" ShapeID="_x0000_s1531" DrawAspect="Content" ObjectID="_1672753340"> </o:OLEObject> <![endif]><![if gte mso 9]><o:OLEObject Type="Embed" ProgID="Equation.3" ShapeID="_x0000_s1534" DrawAspect="Content" ObjectID="_1672753341"> </o:OLEObject> <![endif]><![if gte mso 9]><o:OLEObject Type="Embed" ProgID="Equation.3" ShapeID="_x0000_s1538" DrawAspect="Content" ObjectID="_1672753342"> </o:OLEObject> <![endif]><![endif]--> <!--[if !vml]--><img width="281" height="85" align="left" v:shapes="_x0000_s1542 _x0000_s1518 _x0000_s1519 _x0000_s1520 _x0000_s1521 _x0000_s1522 _x0000_s1523 _x0000_s1524 _x0000_s1525 _x0000_s1526 _x0000_s1528 _x0000_s1529 _x0000_s1530 _x0000_s1531 _x0000_s1534 _x0000_s1535 _x0000_s1536 _x0000_s1537 _x0000_s1538 _x0000_s1541" src="http://wljy.whut.edu.cn:80/uploadfiles/word/JXGCKZJC%203.files/image034.gif"> <!--[endif]--><span style="mso-bidi-font-size:10.5pt;font-family:黑体">为某系统的开环对数幅频特性折线图。根据图<span lang="EN-US">1</span>，描述正确的是（<span lang="EN-US"><span style="mso-spacerun:yes"> </span></span>）<span lang="EN-US" style="mso-bidi-font-weight:bold"> <o:p></o:p></span></span></p> <p class="MsoNormal"><span lang="EN-US" style="mso-bidi-font-size:10.5pt; font-family:黑体;mso-bidi-font-weight:bold"> <o:p> </o:p></span></p> <p class="MsoNormal"><span lang="EN-US" style="mso-bidi-font-size:10.5pt; font-family:黑体"> <o:p> </o:p></span></p>
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