成考院校在线答案
- 2022-09-12 [判断] <p class="MsoNormal" style="margin-top:15.6pt;mso-para-margin-top:1.0gd">15、<span lang="EN-US" style="font-family:黑体">PID</span><span style="font-family:黑体">校正能改善系统的稳态性能，对系统的快速性无影响。</span><span style="font-size:12.0pt;font-family:黑体">（<span lang="EN-US"><span style="mso-spacerun:yes"> </span></span>）</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;font-family:黑体"> <o:p></o:p></span></p>
- 2022-09-12 [判断] <p class="MsoNormal" style="margin-top:15.6pt;mso-para-margin-top:1.0gd">16、<span class="GramE"><span style="mso-bidi-font-size:10.5pt;font-family:黑体">由实频特性</span></span><span style="mso-bidi-font-size:10.5pt;font-family:黑体">、<span class="GramE">虚频特性</span>就能求得幅频特性、相频特性。</span><span style="font-size:12.0pt;font-family:黑体">（<span lang="EN-US"><span style="mso-spacerun:yes"> </span></span>）</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;font-family:黑体"> <o:p></o:p></span></p>
- 2022-09-12 [判断] <p class="MsoNormal" style="margin-top:15.6pt;mso-para-margin-top:1.0gd">17、<span style="mso-bidi-font-size:10.5pt;font-family:黑体;mso-bidi-font-weight:bold">脉冲响应函数就是系统的传递函数，这是因为脉冲函数的拉氏变换为<span lang="EN-US">1</span>。</span><span style="font-size:12.0pt;font-family:黑体">（<span lang="EN-US"><span style="mso-spacerun:yes"> </span></span>）</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;font-family:黑体"> <o:p></o:p></span></p>
- 2022-09-12 [判断] <p class="MsoNormal" style="margin-top:15.6pt;mso-para-margin-top:1.0gd">11、<span lang="EN-US" style="mso-bidi-font-size:10.5pt;font-family:黑体">PID</span><span style="mso-bidi-font-size:10.5pt;font-family:黑体">是工程中常采用的一种串联校正方式，但它只适用于连续控制系统。</span><span style="font-size:12.0pt;font-family:黑体">（<span lang="EN-US"><span style="mso-spacerun:yes"> </span></span>）</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;font-family:黑体"> <o:p></o:p></span></p>
- 2022-09-12 [判断] <p class="MsoNormal" style="margin-top:15.6pt;mso-para-margin-top:1.0gd">12、<span style="mso-bidi-font-size:10.5pt;font-family:黑体;mso-bidi-font-weight:bold">频率响应是指稳定的线性系统在正弦信号作用下的动态响应。</span><span style="font-size:12.0pt;font-family:黑体">（<span lang="EN-US"><span style="mso-spacerun:yes"> </span></span>）</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;font-family:黑体"> <o:p></o:p></span></p>
- 2022-09-12 [判断] <p class="MsoNormal" style="margin-top:15.6pt;mso-para-margin-top:1.0gd">19、<span style="mso-bidi-font-size:10.5pt;font-family:黑体;mso-bidi-font-weight:bold">在对数坐标图（<span lang="EN-US">Bode</span>图）中，若对数幅频特性图的折线在中频段的斜率小于<span lang="EN-US"><sub> <!--[if gte vml 1]><v:shape id="_x0000_i1533" type="#_x0000_t75" style='width:63pt;height:14.25pt' o:ole=""> <v:imagedata src="JXGCKZJC%2011.files/image013.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="84" height="19" v:shapes="_x0000_i1533" src="http://wljy.whut.edu.cn:80/uploadfiles/word/JXGCKZJC%2011.files/image014.gif"> <!--[endif]--></sub> <!--[if gte mso 9]><xml _tmplitem="5" > <o:OLEObject Type="Embed" ProgID="Equation.3" ShapeID="_x0000_i1533" DrawAspect="Content" ObjectID="_1672752807"> </o:OLEObject> </xml><![endif]--></span>，则系统闭环稳定性较差，甚至不稳定。</span><span style="font-size: 12.0pt;font-family:黑体">（<span lang="EN-US"><span style="mso-spacerun:yes"> </span></span>）</span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;font-family:黑体"> <o:p></o:p></span></p>
- 2022-09-12 [单选] <p class="MsoNormal" style="tab-stops:275.25pt">36、<span style="mso-bidi-font-size: 10.5pt;font-family:黑体">在对系统进行频域分析时，以<span lang="EN-US">Bode</span>图为基础，若要提高系统的抗干扰能力，应采取（<span lang="EN-US"><span style="mso-spacerun:yes"> </span></span>）的措施。<span lang="EN-US"> <o:p></o:p></span></span></p>
- 2022-09-12 [单选] <p class="MsoNormal" style="margin-top:7.8pt;mso-para-margin-top:.5gd">22、<span style="mso-bidi-font-size:10.5pt;font-family:黑体">某单位反馈系统为一型系统，在单位速度信号作用下，其稳态误差为（ <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" style="margin-top:15.6pt;mso-para-margin-top:1.0gd">23、<span style="mso-bidi-font-size:10.5pt;font-family:黑体">关于反馈的说法，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>
- 2022-09-12 [单选] <p class="MsoNormal">29、<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_i1034" type="#_x0000_t75" style='width:35.25pt;height:15pt' o:ole=""> <v:imagedata src="JXGCKZJC%205.files/image019.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="47" height="20" v:shapes="_x0000_i1034" src="http://wljy.whut.edu.cn:80/uploadfiles/word/JXGCKZJC%205.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="_1672754005"> </o:OLEObject> </xml><![endif]--></span>，其<span class="GramE">象</span>函数<span lang="EN-US"><sub> <!--[if gte vml 1]><v:shape id="_x0000_i1035" type="#_x0000_t75" style='width:28.5pt;height:13.5pt' o:ole=""> <v:imagedata src="JXGCKZJC%205.files/image021.wmz" o:title=""></v:imagedata> </v:shape><![endif]--> <!--[if !vml]--><img width="38" height="18" v:shapes="_x0000_i1035" src="http://wljy.whut.edu.cn:80/uploadfiles/word/JXGCKZJC%205.files/image022.gif"> <!--[endif]--></sub> <!--[if gte mso 9]><xml _tmplitem="6" > <o:OLEObject Type="Embed" ProgID="Equation.3" ShapeID="_x0000_i1035" DrawAspect="Content" ObjectID="_1672754006"> </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>