【判断题】【消耗次数:1】
系统的稳态误差是控制系统准确性的一种度量。()
正确
错误
参考答案:
复制
纠错
相关题目
【判断题】 控制系统的稳态误差反映了系统的稳态性能。
①  正确
②  错误
【判断题】 控制系统的稳态误差大小取决于系统结构参数和外输入
①  正确
②  错误
【判断题】 控制系统的基本要求可归结为稳定性;准确性和快速性
①  正确
②  错误
【单选题】 关于线性系统稳态误差,正确的说法是:()
①  一型系统在跟踪斜坡输入信号时无误差;
②  稳态误差计算的通用公式是;
③  增大系统开环增益K可以减小稳态误差;
④  增加积分环节可以消除稳态误差,而且不会影响系统稳定性。
【判断题】 稳定性、快速性和准确性是对自动控制系统性能的基本要求。
①  正确
②  错误
【单选题】 关于线性系统稳态误差,正确的说法是:()
①  一型系统在跟踪斜坡输入信号时无误差;
②  稳态误差计算的通用公式是<imgwidth="144"height="47"src="../uploadfiles/word/zdkzll002.files/image035.png">;
③  增大系统开环增益K可以减小稳态误差;
④  增加积分环节可以消除稳态误差,而且不会影响系统稳定性。
【判断题】 控制系统希望的输出量和实际的输出量之差称为误差,其稳态的分量称为稳态误差或称静态误差。
①  正确
②  错误
【判断题】 系统框图也是控制系统的数学模型的一种形式。()
①  正确
②  错误
【判断题】 对一控制系统的要求是稳定、准确、快速。
①  正确
②  错误
【判断题】 对于一个自动控制系统的性能要求可以概括为三个方面:稳定性、快速性和准确性。
①  正确
②  错误
随机题目
【单选题】 Anger is a normal emotion that we all feel from time to time. Some people express anger openly in a calm reasonable way. Some explode with anger, and scream and shout. But other people keep their anger inside. They can not or will not express it. This is called repressing anger. Many doctors think that repressing anger is more dangerous to a person’s health than expressing it. They say that when a person is angry, the brain gives out the same hormones (荷尔蒙) as that are produced during tense and nervous situations. They speed the heart rate and raise blood pressure, so the person feels excited and ready to act. Repressing these feelings will only make the feelings continue, and this can lead to many medical problems. To prevent these problems, these doctors suggest letting the anger out by expressing it freely. But recently some other doctors question this. They say that people who express anger repeatedly and violently become, in fact, more but not less angry. And this could cause medical problems. However, some doctors say that both repressing and expressing anger can be dangerous. They believe that those who express anger strongly may be more likely to develop heart diseases, and that those who keep their anger inside may face a greater danger of high blood pressure. Doctors say the solution is to learn how to deal with anger. The first step is to admit that you are angry and to recognize the real cause of the anger, and then to decide if the cause is serious enough to get angry about. If it is, do not express your anger while angry. Wait until your anger has cooled down, and express yourself calmly and reasonably. Doctors also say that a good way to deal with anger is to find humor in the situation that has made you angry, for laughter is much healthier than anger.What is the main idea of this passage?
①  Anger should be dealt with in a proper way.
②  Different people deal with anger in different ways.
③  Doctors suggest dealing with anger by repressing it.
④  The best way to deal with anger is to laugh when angry.
【单选题】 It is _____________ that today people in some remote areas know about the rest of the world.
①  difficult
②  amazing
③  inferior
④  superior
【单选题】 They dont____________ the importance of this problem.
①  understands
②  understood
③  understanding
④  understand
【单选题】 The people who ____________ cars work very quickly.
①  astonish
②  assemble
③  afford
④  acquire
【单选题】 Tommy: Mommy, when will we have dinner? I’m starving.Mother: __________ We have to wait for Daddy.
①  OK, honey.
②  Quickly, honey.
③  Soon, honey.
④  All right, honey.
【单选题】 He____________ cold and hunger a great deal.
①  escaped from
②  suffered from
③  kept away from
④  came from
【单选题】 Youdonthavetobeinsuchahurry,Iwouldratheryou________onbusinessfirst.
①  wouldgo
②  willgo
③  went
④  havegone
【单选题】 He____________ her out of her money.
①  chatted
②  changed
③  cheated
④  chose
【单选题】 Now it is illegal (非法的) to kill ______________ for their ivories.
①  tigers
②  lions
③  elephants
④  birds
【单选题】 Will you please____________ the experiment youve just made?
①  repeat
②  recover
③  renew
④  reform