【单选题】【消耗次数:1】
已知开环幅频特性如下图所示,则图中不稳定的系统是()。
系统①
系统②
系统③
都不稳定
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相关题目
【判断题】 系统开环不稳定,则系统闭环也不稳定。()
①  正确
②  错误
【单选题】 已知开环幅频特性如下图所示,则图中不稳定的系统是()。<imgwidth="555"height="175"src="http://wljy.whut.edu.cn//uploadfiles/word/zdkzll002.files/image013.png">
①  系统①
②  系统②
③  系统③
④  都不稳定
【多选题】 开环稳定的系统,其闭环(),开环不稳定的系统,其闭环()
①  不一定稳定
②  不一定不稳定
③  一定稳定
④  一定不稳定
【单选题】 下列系统中属于不稳定的系统是()。
①  闭环极点为的系统
②  闭环特征方程为的系统
③  阶跃响应为的系统
④  脉冲响应为的系统
【单选题】 下列系统中属于不稳定的系统是()。
①  闭环极点为<imgwidth="87"height="26"src="../uploadfiles/word/zdkzll002.files/image031.png">的系统
②  闭环特征方程为<imgwidth="91"height="22"src="../uploadfiles/word/zdkzll002.files/image032.png">的系统
③  阶跃响应为<imgwidth="120"height="24"src="../uploadfiles/word/zdkzll002.files/image033.png">的系统
④  脉冲响应为<imgwidth="76"height="24"src="../uploadfiles/word/zdkzll002.files/image034.png">的系统
【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。()
①  正确
②  错误
【判断题】 如果一个系统受到扰动偏离里了平衡状态,则称系统是不稳定的。
①  正确
②  错误
【判断题】 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,则系统闭环稳定性较差,甚至不稳定。()
①  正确
②  错误
【判断题】 虽然一阶和二阶系统总是稳定的,但若存在延时环节,系统可能变为不稳定。
①  正确
②  错误
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①  肝细胞
②  心肌细胞
③  表皮细胞
④  中枢神经细胞
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