Aspen Dynamics模拟中，closed-loop 与open-loop有何区别啊？

大大木易

在进行中继反馈测试时候，开路循环与闭路循环测试有何区别呢？
谢谢~

独上阳台

新人，来学习下。。                                    

sinopecgyf

我也是新人 学习一下

背包小客

同是新人，正在学{:1106_362:}

罗修绝

我去，这个绝对超越了我学习的领域，完全没听说过啊，坐等学习

花林似霰

本来以为进帖子能学点新东西的，结果回复的都是顶人气的，哎。。。。。

tdl522

What is the difference between a open loop control system and a closed loop control system?

An open loop is not self adjusting, it is controlled by it's input only, any internal feedback loops are fixed (primarily mathematically controlled, in analogue may be gain control or limit filtering).

A closed loop's primary operation is not controlled by it's input, but it can dynamically adjust itself depending on the input.

Though it has to be said that the two systems have areas where the differences are slight, where it is difficult to decide if the loop is a clasic cloed or open system.

For example, a multi-input circuit may have a primary input then a secondary input that determines how the control acts on the main input-output path. This ought really be called a open loop, because the control circuit itself is not providing the self monitoring adjustments of a closed loop system.

In general digital circuits tend to have a very clear open/closed loop. analogue tends to be gray in some areas. Afterall, you could really say that even automatic gain control makes a circuit closed.


看看吧，自己理解下！

tdl522

Open & Closed Loop Control System - Advantages & Disadvantages


Open & Closed Loop System - Advantages & Disadvantages [Control System].

In control systems engineering, a system is actually a group of objects or elements capable of performing individual tasks. They are connected in a specific sequence to perform a specific function.



A system is of 2 types:

• Open loop system which is also called as Manual control system.
• Closed loop system which is also named as automatic control system.
  

In this post, we will be discussing various advantages and disadvantages of the 2 types of control systems.

Open Loop System:
Advantages:

• Simplicity and stability: they are simpler in their layout and hence are economical and stable too due to their simplicity.
• Construction: Since these are having a simple layout so are easier to construct.
  

Disadvantages:

• Accuracy and Reliability: since these systems do not have a feedback mechanism, so they are very inaccurate in terms of result output and hence they are unreliable too.
• Due to the absence of a feedback mechanism, they are unable to remove the disturbances occurring from external sources.
  

Closed Loop System:
Advantages:

• Accuracy: They are more accurate than open loop system due to their complex construction. They are equally accurate and are not disturbed in the presence of non-linearities.
• Noise reduction ability: Since they are composed of a feedback mechanism, so they clear out the errors between input and output signals, and hence remain unaffected to the external noise sources.
  

Disadvantages:

• Construction: They are relatively more complex in construction and hence it adds up to the cost making it costlier than open loop system.
• Since it consists of feedback loop, it may create oscillatory response of the system and it also reduces the overall gain of the system.
• Stability: It is less stable than open loop system but this disadvantage can be striked off since we can make the sensitivity of the system very small so as to make the system as stable as possible.
  

还有这些内容！

xingning

应该是控制系统有没有闭环（投运）的区别。