成考院校在线答案
- 2022-09-12 [单选] <p class="MsoNormal" align="left" style="text-align:left">30、<span style="mso-bidi-font-size: 10.5pt;font-family:黑体">惯性环节使系统的输出随输入信号的频率增加而其（ <span lang="EN-US"><span style="mso-spacerun:yes"> </span></span>）。<span lang="EN-US"> <o:p></o:p></span></span></p>
- 2022-09-12 [单选] <p class="MsoNormal">31、<span style="mso-bidi-font-size:10.5pt;font-family:黑体">相位裕量<span lang="EN-US"><sub> <!--[if gte vml 1]><v:shapetype id="_x0000_t75" coordsize="21600,21600" o:spt="75" o:preferrelative="t" path="m@4@5l@4@11@9@11@9@5xe" filled="f" stroked="f"> <v:stroke joinstyle="miter"></v:stroke> <v:formulas> <v:f eqn="if lineDrawn pixelLineWidth 0"></v:f> <v:f eqn="sum @0 1 0"></v:f> <v:f eqn="sum 0 0 @1"></v:f> <v:f eqn="prod @2 1 2"></v:f> <v:f eqn="prod @3 21600 pixelWidth"></v:f> <v:f eqn="prod @3 21600 pixelHeight"></v:f> <v:f eqn="sum @0 0 1"></v:f> <v:f eqn="prod @6 1 2"></v:f> <v:f eqn="prod @7 21600 pixelWidth"></v:f> <v:f eqn="sum @8 21600 0"></v:f> <v:f eqn="prod @7 21600 pixelHeight"></v:f> <v:f eqn="sum @10 21600 0"></v:f> </v:formulas> <v:path o:extrusionok="f" gradientshapeok="t" o:connecttype="rect"></v:path> <o:lock v:ext="edit" aspectratio="t"></o:lock> </v:shapetype><v:shape id="_x0000_i1025" type="#_x0000_t75" style='width:27.75pt; height:16.5pt' o:ole=""> <v:imagedata src="JXGCKZJC%205.files/image001.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="37" height="22" v:shapes="_x0000_i1025" src="http://wljy.whut.edu.cn:80/uploadfiles/word/JXGCKZJC%205.files/image002.gif"> <!--[endif]--></sub> <!--[if gte mso 9]><xml _tmplitem="6" > <o:OLEObject Type="Embed" ProgID="Equation.3" ShapeID="_x0000_i1025" DrawAspect="Content" ObjectID="_1672753995"> </o:OLEObject> </xml><![endif]--></span>是衡量系统相对稳定性的指标。只有（<span lang="EN-US"><span style="mso-spacerun:yes"> </span></span>）时，才能判断系统是稳定的。<span lang="EN-US"> <o:p></o:p></span></span></p>
- 2022-09-12 [单选] <p class="MsoNormal" style="margin-top:15.6pt;mso-para-margin-top:1.0gd">33、<span style="mso-bidi-font-size:10.5pt;font-family:黑体">极坐标图（<span lang="EN-US">Nyquist</span>图）上以原点为圆心的单位圆对应于对数幅频特性图（<span lang="EN-US">Bode</span>图）上的（<span lang="EN-US"><span style="mso-spacerun:yes"> </span></span>）。<span lang="EN-US"> <o:p></o:p></span></span></p>
- 2022-09-12 [单选] <p class="MsoNormal">35、<span style="mso-bidi-font-size:10.5pt;font-family:黑体">单位反馈控制系统为<span lang="EN-US">I</span>型系统，开环增益为<i style="mso-bidi-font-style:normal"><span lang="EN-US">k</span></i>，在<i style="mso-bidi-font-style:normal"><span lang="EN-US"><sub> <!--[if gte vml 1]><v:shape id="_x0000_i1044" type="#_x0000_t75" style='width:42.75pt;height:16.5pt' o:ole=""> <v:imagedata src="JXGCKZJC%202.files/image039.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="57" height="22" v:shapes="_x0000_i1044" src="http://wljy.whut.edu.cn:80/uploadfiles/word/JXGCKZJC%202.files/image040.gif"> <!--[endif]--></sub> <!--[if gte mso 9]><xml _tmplitem="6" > <o:OLEObject Type="Embed" ProgID="Equation.3" ShapeID="_x0000_i1044" DrawAspect="Content" ObjectID="_1672753024"> </o:OLEObject> </xml><![endif]--></span></i>（<i style="mso-bidi-font-style:normal"><span lang="EN-US">R</span></i>为常数）的输入作用下的稳态误差<i style="mso-bidi-font-style:normal"><span lang="EN-US"><sub> <!--[if gte vml 1]><v:shape id="_x0000_i1045" type="#_x0000_t75" style='width:22.5pt;height:16.5pt' o:ole=""> <v:imagedata src="JXGCKZJC%202.files/image041.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="30" height="22" v:shapes="_x0000_i1045" src="http://wljy.whut.edu.cn:80/uploadfiles/word/JXGCKZJC%202.files/image042.gif"> <!--[endif]--></sub> <!--[if gte mso 9]><xml _tmplitem="6" > <o:OLEObject Type="Embed" ProgID="Equation.3" ShapeID="_x0000_i1045" DrawAspect="Content" ObjectID="_1672753025"> </o:OLEObject> </xml><![endif]--></span></i>（<span lang="EN-US"><span style="mso-spacerun:yes"> </span></span>）。<span lang="EN-US"> <o:p></o:p></span></span></p>
- 2022-09-12 [单选] <p class="MsoNormal">39、<span class="GramE"><span style="mso-bidi-font-size:10.5pt; font-family:黑体">在阶跃信号</span></span><span style="mso-bidi-font-size:10.5pt; font-family:黑体">输入作用下，阻尼比（<span lang="EN-US"><span style="mso-spacerun:yes"> </span></span>）的二阶系统，其响应具有幅值逐渐衰减的振荡特性。<span lang="EN-US"><span style="mso-spacerun:yes"> </span> <o:p></o:p></span></span></p>
- 2022-09-12 [单选] <p class="MsoNormal">40、<span style="mso-bidi-font-size:10.5pt;font-family:黑体">某原函数<span lang="EN-US"><sub> <!--[if gte vml 1]><v:shape id="_x0000_i1031" type="#_x0000_t75" style='width:57.75pt;height:16.5pt' o:ole=""> <v:imagedata src="JXGCKZJC%203.files/image013.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="77" height="22" v:shapes="_x0000_i1031" src="http://wljy.whut.edu.cn:80/uploadfiles/word/JXGCKZJC%203.files/image014.gif"> <!--[endif]--></sub> <!--[if gte mso 9]><xml _tmplitem="6" > <o:OLEObject Type="Embed" ProgID="Equation.3" ShapeID="_x0000_i1031" DrawAspect="Content" ObjectID="_1672753329"> </o:OLEObject> </xml><![endif]--></span>，则其<span class="GramE">象</span>函数<span lang="EN-US"><sub> <!--[if gte vml 1]><v:shape id="_x0000_i1032" type="#_x0000_t75" style='width:35.25pt;height:16.5pt' o:ole=""> <v:imagedata src="JXGCKZJC%203.files/image015.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="47" height="22" v:shapes="_x0000_i1032" src="http://wljy.whut.edu.cn:80/uploadfiles/word/JXGCKZJC%203.files/image016.gif"> <!--[endif]--></sub> <!--[if gte mso 9]><xml _tmplitem="6" > <o:OLEObject Type="Embed" ProgID="Equation.3" ShapeID="_x0000_i1032" DrawAspect="Content" ObjectID="_1672753330"> </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>
- 2022-09-12 [判断] <p class="MsoNormal" style="mso-pagination:widow-orphan;">1、<span style="mso-spacerun:'yes';font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:0.0000pt;">A型平键的两侧面为工作面。（ ）</span><span style="font-family:'Times New Roman';font-size:10.5000pt;mso-font-kerning:0.0000pt;"> <o:p></o:p></span></p>
- 2022-09-12 [判断] <p class="MsoNormal" style="mso-pagination:widow-orphan;">2、<span style="mso-spacerun:'yes';font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:0.0000pt;">在相同条件下，普通V带的承载能力比平带大。 （ ）</span><span style="font-family:'Times New Roman';font-size:10.5000pt;mso-font-kerning:0.0000pt;"> <o:p></o:p></span></p>
- 2022-09-12 [判断] <p class="MsoNormal" style="mso-pagination:widow-orphan;">17、<span style="mso-spacerun:'yes';font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:0.0000pt;">一切自由度不为1 的机构都不可能有确定的运动。( )</span><span style="font-family:'Times New Roman';font-size:10.5000pt;mso-font-kerning:0.0000pt;"> <o:p></o:p></span></p>
- 2022-09-12 [判断] <p class="MsoNormal" style="mso-pagination:widow-orphan;">6、<span style="mso-spacerun:'yes';font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:0.0000pt;">机构运动确定的条件是自由度大于等于1。（ ）</span><span style="font-family:'Times New Roman';font-size:10.5000pt;mso-font-kerning:0.0000pt;"> <o:p></o:p></span></p>