武汉理工大20秋控制工程基础-作业二
控制工程基础-作业二1.[判断题] 最小相位系统是指系统的开环传递函数的极点位于S平面的左半平面。( )
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A.正确
B.错误
答:——B——
2.[判断题] 在自动控制系统中,用来描述系统内在规律的数学模型有许多不同的形式,在以单输入、单输出系统为研究目标的经典控制理论中,常用的模型有微分方程传递函数、动态结构图、频率特性等。( )
A.正确
B.错误
答:——A——
3.[判断题] 线性化是相对某一额定工作点进行的。工作点不同,得到线性化微分方程的系数也不同。( )
A.正确
B.错误
答:——A——
4.[判断题] <p class="MsoNormal" style="text-align:left; "><span style="mso-spacerun:'yes'; font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; ">最大超调量只决定于阻尼比</span><span style="font-family:Microsoft Yahei; font-style:italic; font-size:12.0000pt; mso-font-kerning:1.0000pt; "><img width="14" height="22" src="http://wljy.whut.edu.cn//uploadfiles/word/kzgcbk06.files/kzgcbk063295.png"></span>,<span style="font-family:Microsoft Yahei; font-style:italic; font-size:12.0000pt; mso-font-kerning:1.0000pt; "><img width="13" height="21" src="http://wljy.whut.edu.cn//uploadfiles/word/kzgcbk06.files/kzgcbk063319.png"></span>越小,最大超调量越大。<span style="mso-spacerun:'yes'; font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; ">( )</span><span style="font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; "><o:p></o:p></span></p>
A.正确
B.错误
答:————
5.[判断题] 惯性环节的时间常数越大,则系统的快速性越好。( )
A.正确
B.错误
答:————
6.[判断题] PI校正能改善控制系统的稳态特性,但对系统的动态特性无影响。( )
A.正确
B.错误
答:————
7.[判断题] 在随动(伺服)控制系统中,系统的输入、输出已知,而系统的结构未知。( )
A.正确
B.错误
答:————
8.[判断题] <p class="MsoNormal" style="text-align:left; "><span style="mso-spacerun:'yes'; font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; ">在对数坐标图中,若幅频对数特性图的折线在中频段的斜率小于</span><span style="font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; "><img width="84" height="19" src="http://wljy.whut.edu.cn//uploadfiles/word/kzgcbk05.files/kzgcbk05953.png"></span>,则系统闭环稳定性较差,甚至不稳定。<span style="mso-spacerun:'yes'; font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; ">( )</span><span style="font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; "><o:p></o:p></span></p>
A.正确
B.错误
答:————
9.[判断题] <p class="MsoNormal"><span style="mso-spacerun:'yes'; font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; ">在控制系统的时域性能指标中,最大超调量</span><span style="font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; "><img width="27" height="25" src="http://wljy.whut.edu.cn//uploadfiles/word/kzgcbk05.files/kzgcbk05458.png"></span>衡量的是系统的稳定性指标。<span style="mso-spacerun:'yes'; font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; ">( )</span><span style="font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; "><o:p></o:p></span></p>
A.正确
B.错误
答:————
10.[判断题] 用劳斯表判断连续系统的稳定性,当它的第一列系数全部为正数,系统是稳定的。( )
A.正确
B.错误
答:————
11.[判断题] 系统的稳态误差是控制系统准确性的一种度量。( )
A.正确
B.错误
答:————
12.[判断题] 控制系统的构成不同,故其数学模型也不同。( )
A.正确
B.错误
答:————
13.[判断题] 闭环传递函数中积分环节的个数决定了系统的类型。( )
A.正确
B.错误
答:————
14.[判断题] 一阶系统的单位阶跃响应曲线会有超调。( )
A.正确
B.错误
答:————
15.[判断题] Ⅰ型系统在阶跃信号输入下,其稳态误差为0。( )
A.正确
B.错误
答:————
16.[判断题] 若系统开环极坐标图(Nyquist图)包围了(-1,j0)点,系统闭环不稳定。( )
A.正确
B.错误
答:————
17.[判断题] 某二阶系统的特征根为两个具有负实部的共轭复根,则该系统的单位阶跃响应曲线表现为等幅振荡( )
A.正确
B.错误
答:————
18.[判断题] 传递函数只与系统结构参数有关,与输出量、输入量无关。( )
A.正确
B.错误
答:————
19.[判断题] 传递函数是复变量s的有理真分式,分母多项式的次数n高于分子多项式的次数m,而且其所有系数均为实数( )
A.正确
B.错误
答:————
20.[判断题] <p class="MsoNormal" style="text-align:left; "><span style="mso-spacerun:'yes'; font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; ">二阶系统当阻尼比</span><span style="font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; "><img width="35" height="21" src="http://wljy.whut.edu.cn//uploadfiles/word/kzgcbk05.files/kzgcbk052344.png"></span>时,被称之为无<span style="mso-spacerun:'yes'; font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; ">阻尼系统。</span><span style="mso-spacerun:'yes'; font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; ">( )</span><span style="font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; "><o:p></o:p></span></p>
A.正确
B.错误
答:————
21.[单选题] PD控制规律指的是( )
A.比例、微分控制
B.比例、积分控制
C.积分、微分控制
D.比例、微分、积分控制
答:————
22.[单选题] <p class="MsoNormal" style="text-align:left; "><span style="mso-spacerun:'yes'; font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; ">单位阶跃函数</span><span style="font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; "><img width="21" height="18" src="http://wljy.whut.edu.cn//uploadfiles/word/kzgcbk02.files/kzgcbk021449.png"></span>的拉斯变换为<span style="mso-spacerun:'yes'; font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; ">( )</span><span style="font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; "><o:p></o:p></span></p>
A.1
B.0 福师答案Q761296021更多答案请进 www.ap5u.com
C.1/s
D.s
答:————
23.[单选题] <p class="MsoNormal" style="text-align:left; "><span style="mso-spacerun:'yes'; font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; ">某系统的传递函数为</span><span style="font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; "><img width="28" height="34" src="http://wljy.whut.edu.cn//uploadfiles/word/kzgcbk01.files/kzgcbk014075.png"></span>,则该系统的单位脉冲响应为<span style="mso-spacerun:'yes'; font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; ">( )</span><span style="font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; "><o:p></o:p></span></p>
A.<p class="MsoNormal" style="display:inline;"><span style="font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; "><img width="44" height="21" src="http://wljy.whut.edu.cn//uploadfiles/word/kzgcbk01.files/kzgcbk014119.png"></span> <o:p></o:p></p>
B.<p class="MsoNormal" style="display:inline;"><span style="font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; "><img width="39" height="21" src="http://wljy.whut.edu.cn//uploadfiles/word/kzgcbk01.files/kzgcbk014144.png"></span> <o:p></o:p></p>
C.<p class="MsoNormal" style="display:inline;"><span style="font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; "><img width="27" height="18" src="http://wljy.whut.edu.cn//uploadfiles/word/kzgcbk01.files/kzgcbk014169.png"></span> <o:p></o:p></p>
D.<p class="MsoNormal" style="display:inline;"><span style="font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; "><img width="19" height="18" src="http://wljy.whut.edu.cn//uploadfiles/word/kzgcbk01.files/kzgcbk014194.png"></span> <o:p></o:p></p>
答:————
24.[单选题] PI控制规律指的是( )
A.比例、微分控制
B.比例、积分控制
C.积分、微分控制
D.比例、微分、积分控制
答:————
25.[单选题] <p class="MsoNormal" style="text-align:left; "><span style="mso-spacerun:'yes'; font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; ">某系统的传递函数为</span><span style="font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; "><img width="41" height="37" src="http://wljy.whut.edu.cn//uploadfiles/word/kzgcbk02.files/kzgcbk024006.png"></span>,则该系统的单位脉冲响应为<span style="mso-spacerun:'yes'; font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; ">( )</span><span style="font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; "><o:p></o:p></span></p>
A.<p class="MsoNormal" style="display:inline;"><span style="font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; "><img width="30" height="21" src="http://wljy.whut.edu.cn//uploadfiles/word/kzgcbk02.files/kzgcbk024050.png"></span> <o:p></o:p></p>
B.<p class="MsoNormal" style="display:inline;"><span style="font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; "><img width="34" height="21" src="http://wljy.whut.edu.cn//uploadfiles/word/kzgcbk02.files/kzgcbk024075.png"></span> <o:p></o:p></p>
C.<p class="MsoNormal" style="display:inline;"><span style="font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; "><img width="36" height="18" src="http://wljy.whut.edu.cn//uploadfiles/word/kzgcbk02.files/kzgcbk024100.png"></span> <o:p></o:p></p>
D.<p class="MsoNormal" style="display:inline;"><span style="font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; "><img width="37" height="21" src="http://wljy.whut.edu.cn//uploadfiles/word/kzgcbk02.files/kzgcbk024125.png"></span> <o:p></o:p></p>
答:————
26.[单选题] 频率响应是指线性系统对正弦输入信号的( )
A.瞬态响应
B.动态反映
C.稳态响应
D.时间函数
答:————
27.[单选题] 对于开环频率特性曲线与闭环系统性能之间的关系,以下叙述中正确的是( )
A.开环频率特性的中频段表征了闭环系统的稳态特性
B.开环频率特性的中频段表征了闭环系统的动态特性
C.开环频率特性的中频段表征了闭环系统的抗干扰能力
D.开环频率特性的中频段表征了闭环系统的增益大小
答:————
28.[单选题] 下列哪个传递函数的极坐标图为单位圆( )
A.<p class="MsoNormal" style="display:inline;"><span style="font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; "><img width="33" height="34" src="http://wljy.whut.edu.cn//uploadfiles/word/kzgcbk01.files/kzgcbk011931.png"></span> <o:p></o:p></p>
B.<p class="MsoNormal" style="display:inline;"><span style="font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; "><img width="13" height="20" src="http://wljy.whut.edu.cn//uploadfiles/word/kzgcbk01.files/kzgcbk011956.png"></span> <o:p></o:p></p>
C.<p class="MsoNormal" style="display:inline;"><span style="font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; "><img width="47" height="23" src="http://wljy.whut.edu.cn//uploadfiles/word/kzgcbk01.files/kzgcbk011981.png"></span> <o:p></o:p></p>
D.<p class="MsoNormal" style="display:inline;"><span style="font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; "><img width="11" height="34" src="http://wljy.whut.edu.cn//uploadfiles/word/kzgcbk01.files/kzgcbk012006.png"></span> <o:p></o:p></p>
答:————
29.[单选题] 开环系统与闭环系统最本质的区别是( )
A.开环系统的输出对系统无控制作用,闭环系统的输出对系统有控制作用
B.开环系统的输入对系统无控制作用,闭环系统的输入对系统有控制作用
C.开环系统构成简单,闭环系统构成复杂
D.开环系统构成复杂,闭环系统构成简单
答:————
30.[单选题] <p class="MsoNormal"><span style="mso-spacerun:'yes'; font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; ">二阶系统的动态指标中,调整时间</span><span style="font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; "><img width="20" height="20" src="http://wljy.whut.edu.cn//uploadfiles/word/kzgcbk01.files/kzgcbk01917.png"></span><span style="mso-spacerun:'yes'; font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; ">反映了系统的</span><span style="mso-spacerun:'yes'; font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; ">( )。</span><span style="font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; "><o:p></o:p></span></p>
A.稳定性
B.准确性
C.平稳性
D.快速性
答:————
31.[单选题] 取出输出量并送回到输入端,使输出量与输入量相比较产生偏差的过程被称之为( )
A.信号检测
B.输入
C.输出
D.反馈
答:————
32.[单选题] <p class="MsoNormal"><span style="mso-spacerun:'yes'; font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; ">某系统的传递函数</span><span style="font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; "><img width="62" height="33" src="http://wljy.whut.edu.cn//uploadfiles/word/kzgcbk02.files/kzgcbk022956.png"></span>,当输入<span style="font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; "><img width="76" height="20" src="http://wljy.whut.edu.cn//uploadfiles/word/kzgcbk02.files/kzgcbk022983.png"></span> 时,则其稳态输出的幅值为<span style="mso-spacerun:'yes'; font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; ">( )</span><span style="font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; "><o:p></o:p></span></p>
A.<p class="MsoNormal" style="display:inline;"><span style="font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; "><img width="19" height="19" src="http://wljy.whut.edu.cn//uploadfiles/word/kzgcbk02.files/kzgcbk023027.png"></span> <o:p></o:p></p>
B.<p class="MsoNormal" style="display:inline;"><span style="font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; "><img width="32" height="19" src="http://wljy.whut.edu.cn//uploadfiles/word/kzgcbk02.files/kzgcbk023052.png"></span> <o:p></o:p></p>
C.2
D.4
答:————
33.[单选题] 传递函数反映了系统的动态性能,它与下列哪些因素有关( )
A.输入信号
B.初始条件
C.系统的结构参数
D.输入信号和初始条件
答:————
34.[单选题] 闭环控制系统是指系统中有( )。
A.反馈回路
B.惯性环节
C.积分环节
D.PID调节器
答:————
35.[单选题] 最小相位系统是指系统的开环传递函数的所有( )均在s左半平面。
A.零点
B.零点和极点
C.拐点
D.极点
答:————
36.[单选题] <p class="MsoNormal" style="text-align:left; "><span style="mso-spacerun:'yes'; font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; ">二阶系统的动态指标中,最大超调量</span><span style="font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; "><img width="26" height="24" src="http://wljy.whut.edu.cn//uploadfiles/word/kzgcbk02.files/kzgcbk02955.png"></span>反映了系统的<span style="mso-spacerun:'yes'; font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; ">( )</span><span style="font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; "><o:p></o:p></span></p>
A.稳定性
B.准确性
C.平稳性
D.快速性
答:————
37.[单选题] <p class="MsoNormal"><span style="mso-spacerun:'yes'; font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; ">在频域分析中是以</span><span style="font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; "><img width="17" height="20" src="http://wljy.whut.edu.cn//uploadfiles/word/kzgcbk01.files/kzgcbk011391.png"></span><span style="mso-spacerun:'yes'; font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; ">作为独立变量的,以下哪种信号作为基本输入信号来分析系统的性能</span><span style="mso-spacerun:'yes'; font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; ">( )。</span><span style="font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; "><o:p></o:p></span></p>
A.正切信号
B.余弦信号
C.正弦信号
D.随机信号
答:————
38.[单选题] 极坐标图(Nyquist图)上以原点为圆心的单位圆对应于对数坐标图(Bode图)上的( )
A.0dB线
B.+20dB线
C.-20dB线
D.<p class="MsoNormal" style="display:inline;"><span style="font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; "><img width="16" height="19" src="http://wljy.whut.edu.cn//uploadfiles/word/kzgcbk02.files/kzgcbk022003.png"></span>线<span style="font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; "><o:p></o:p></span></p>
答:————
39.[单选题] 系统稳定的充分必要条件是:系统传递函数的所有( )均有负实部。
A.零点
B.零点和极点
C.拐点
D.极点
答:————
40.[单选题] <p class="MsoNormal" style="text-align:left; "><span style="mso-spacerun:'yes'; font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; ">一阶微分环节</span><span style="font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; "><img width="73" height="19" src="http://wljy.whut.edu.cn//uploadfiles/word/kzgcbk01.files/kzgcbk012953.png"></span>,当<span style="font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; "><img width="51" height="19" src="http://wljy.whut.edu.cn//uploadfiles/word/kzgcbk01.files/kzgcbk012978.png"></span> 时,则相频特性<span style="font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; "><img width="47" height="18" src="http://wljy.whut.edu.cn//uploadfiles/word/kzgcbk01.files/kzgcbk013009.png"></span>为<span style="mso-spacerun:'yes'; font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; ">( )</span><span style="font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; "><o:p></o:p></span></p>
A.<p class="MsoNormal" style="text-align:left; " style="display:inline;"><span style="font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; "><img width="28" height="18" src="http://wljy.whut.edu.cn//uploadfiles/word/kzgcbk01.files/kzgcbk013041.png"></span> <o:p></o:p></p>
B.<p class="MsoNormal" style="display:inline;"><span style="font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; "><img width="28" height="18" src="http://wljy.whut.edu.cn//uploadfiles/word/kzgcbk01.files/kzgcbk013066.png"></span> <o:p></o:p></p>
C.<p class="MsoNormal" style="display:inline;"><span style="font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; "><img width="20" height="18" src="http://wljy.whut.edu.cn//uploadfiles/word/kzgcbk01.files/kzgcbk013091.png"></span> <o:p></o:p></p>
D.<p class="MsoNormal" style="display:inline;"><span style="font-family:Microsoft Yahei; font-size:12.0000pt; mso-font-kerning:1.0000pt; "><img width="19" height="18" src="http://wljy.whut.edu.cn//uploadfiles/word/kzgcbk01.files/kzgcbk013116.png"></span> <o:p></o:p></p>
答:————
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