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[单选题]
随时间推移，系统对干扰信号的响应不断扩大,控制系统- -定是
A.稳定的
B.不稳定的
C.有时稳定
D.无法判断
A
B
C
D
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参考答案
试题答案：
B
答案解释：
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开环传递函数为（）的闭环系统是稳定的。
系统从一种稳定状态达到另-种稳定状态所需的时间称为_
在单输人一单输出系统的瞬态响应分析或频率响应分析中,采用的数学模型是___ ，在现代控制理论中,数学模型则采用____。
一阶系统时间常数的大小主要影响系统的什么性能_____。
本书中传递函数的定义适用于所有系统。
系统传递函数只与___________有 关，与___________无 关。
当输入已知，且输出也是给定时，确定系统应使得输出尽可能符合给定的最佳要求，称为最优控制。
对控制系统提出的基本要求是_________。
开环增益K增加，系统的稳定性（）
若f(t)（t<0时，f(t)=0）的拉氏变换为F(s)，则f(t-τ)的拉氏变换为（）
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