Control Engineering: Load Variation & Effects on Open/Closed Loop Systems

[steven1988]

hi everyone I've jst started a control unit at college and i hope some one can help me out with this question?

Explain the effect of load variation on open and closed loop control systems. State the purpose of each stage and clearly show the direction of information flow. Explain the effects of the operating time of a closed loop and state the purpose of a set point??

thanks in advance...

 

[stewartcs]

hi everyone I've jst started a control unit at college and i hope some one can help me out with this question?

Explain the effect of load variation on open and closed loop control systems. State the purpose of each stage and clearly show the direction of information flow. Explain the effects of the operating time of a closed loop and state the purpose of a set point??

thanks in advance...

Welcome to PF steven1988,

You'll need to post your thoughts first so we'll know where you need help.

CS

 

[Mene]

Control engineering is a field of study that deals with the design, analysis, and implementation of control systems for various applications. In this context, a control system refers to a system that is designed to maintain a desired output or behavior by adjusting its inputs. Load variation is a common phenomenon in many control systems, and it refers to changes in the external conditions or disturbances that affect the system's performance. In this response, we will discuss the effects of load variation on open and closed loop control systems and their respective purposes.

Open loop control systems are designed to operate without any feedback from the output. In other words, the input is determined solely based on the desired output. In open loop systems, load variation can have a significant impact on the system's performance as it can cause the output to deviate from the desired value. This is because the input is not adjusted in response to the changes in the external conditions. Therefore, the purpose of the open loop stage is to provide a predetermined input to the system based on the desired output. The information flow in an open loop system is unidirectional, from the input to the output.

On the other hand, closed loop control systems use feedback from the output to adjust the input and maintain the desired output. In this case, load variation can still affect the system's performance, but to a lesser extent. The feedback loop in a closed loop system allows for adjustments to be made in response to changes in the external conditions, thereby reducing the impact of load variation. The purpose of the closed loop stage is to continuously monitor the output and make adjustments to the input to maintain the desired output. The information flow in a closed loop system is bidirectional, as the output is fed back to the input for adjustment.

The operating time of a closed loop system refers to the amount of time it takes for the system to reach and maintain the desired output after a load variation occurs. The longer the operating time, the longer the system takes to stabilize and maintain the desired output. This can be problematic in time-sensitive applications. The purpose of the set point in a closed loop system is to specify the desired output that the system should maintain. The set point serves as a reference for the system to make adjustments and maintain the desired output.

In conclusion, load variation can have a significant impact on the performance of both open and closed loop control systems. Open loop systems are more susceptible to load variation, while closed loop systems can mitigate its effects to a certain extent. The purpose