2024知到答案 自动控制原理-2020春夏学期校内课 最新知到智慧树满分章节测试答案

第一章 单元测试

1、 问题:

Control is an action which can measure value of controlled variable. It means that control measures the value of the controlled variable of the system.

选项：
A:对
B:错
答案: 【对】

2、 问题:

A system is a combination of components and machinethat used in the system.

选项：
A:对
B:错
答案: 【错】

3、 问题:

Many industrial control systems in 1900s and 1950s used PID controllers to control pressure, temperature, etc.

选项：
A:错
B:对
答案: 【错】

4、 问题:

Modern control theory made the design of control systems simpler because the theory is based on a model of an actual control system. However, the system’s stability is sensitive to the error between the actual system and its model.

选项：
A:错
B:对
答案: 【对】

5、 问题:

The open-loop control system has also some disadvantages such as it has lower sensitive to disturbances and inability to correct the disturbances.

选项：
A:错
B:对
答案: 【错】

6、 问题:

A special dc generator, used to measure velocity without differentiation process. The output of a tachometer is proportional to linear velocity of motor.

选项：
A:错
B:对
答案: 【错】

7、 问题:The gap or difference between steady-state and input command is called steady-state error.
选项：
A:对
B:错
答案: 【对】

8、 问题:

The sinusoid signal can beused for transient response modeling, and steady-state error analysis.

选项：
A:对
B:错
答案: 【对】

9、 问题:

The impulse signal can be used for transient response modeling and steady-state error analysis.

选项：
A:对
B:错
答案: 【错】

10、 问题:

It is necessary for us to learn about the components of closed-loop control system. The typical closed-loop control system consists of Signal generator, Measurement elements or sensors, Comparison elements, Amplifier elements, Actuator, Controller or compensator, and Controlled plant.

选项：
A:对
B:错
答案: 【对】

第二章 单元测试

1、 问题:

The transfer function has I/O relationships of system components or systems; the transfer function can be described by linear, time-invariant, and differential equations with initial conditions zero such that y(t)=y(0-)=1.

选项：
A:错
B:对
答案: 【错】

2、 问题:

If the transfer function of a system is known, the output or response can be studied for various forms of inputs to understand the nature of the system.

选项：
A:对
B:错
答案: 【对】

3、 问题:

An actuator is a type of AC motor that is responsible for moving or controlling a mechanism or system.

选项：
A:对
B:错
答案: 【错】

4、 问题:

Sensor can be used to compare the output to the reference input signal.

选项：
A:对
B:错
答案: 【对】

5、 问题:Any linear control system may be represented by a block diagram consisting of blocks, summing points, and branch points;Remember here, the feedback connection has no block, so the feed transfer function value is unity here.
选项：
A:对
B:错
答案: 【对】

6、 问题:Summing point is a junction or symbol in a block diagram of a system; Signal can be added or subtracted or both added and subtracted in the summing point or junction; Quantities of the signal being added or subtracted have the same dimension and the same units.
选项：
A:对
B:错
答案: 【对】

7、 问题:

The Impulse–Response Function (IRF) which can be denoted by g(t), and this g(t) is the response of a linear system to unit-impulse input when the initial conditions are zero.

选项：
A:错
B:对
答案: 【对】

8、 问题:

The Laplace Transform of impulse-response function gives transfer functionsuch that, Laplace of g(t) will give us the transfer function, G(s); whereas, the inverse Laplace of transfer function G(s) provides Impulse–Response Function (IRF), g(t).

选项：
A:对
B:错
答案: 【对】

9、 问题:Automatic Control Systems can be represented by block/blocks or a set of block diagrams which is contained the input, output and transfer function, etc. However, A block diagram of a system is a pictorial representation of the functions performed by each component and of the flow of signals.
选项：
A:错
B:对
答案: 【对】

10、 问题:Electric, a hydraulic, or a pneumatic motor or valve are not examples of actuator.
选项：
A:对
B:错
答案: 【错】

第三章 单元测试

1、 问题:

Transmittance may be real gain or complex gain which can be expressed in transfer function between two nodes.

选项：
A:错
B:对
答案: 【对】