Electrical Engineering (EE) Exam > Electrical Engineering (EE) Questions > Which of the following is NOT the disadvantag...
Start Learning for Free
Which of the following is NOT the disadvantage of lag compensator in a control system?
- a)In lag compensator, the attenuation offered by it shifts the gain crossover frequency to a lower point, thereby decreasing the bandwidth.
- b)The lag network offers a reduction in bandwidth, and this gives shorter rise time and settling time and so the transient response.
- c)A lag compensator somewhat acts as a proportional plus integral controller, hence adversely affects the stability of the system.
- d)Though the system response is longer due to decreased bandwidth, the response is quite slow
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
Which of the following is NOT the disadvantage of lag compensator in a...
Understanding Lag Compensators
Lag compensators are used in control systems to improve stability and steady-state error. However, they come with certain disadvantages that affect system performance.
Disadvantages of Lag Compensators
- Bandwidth Reduction:
Lag compensators typically reduce the bandwidth of the system. This is because they shift the gain crossover frequency to a lower point, which can lead to slower response times.
- Longer Response Times:
The decrease in bandwidth results in a longer system response, characterized by slower rise times and settling times. This means that while the steady-state error might be improved, the overall responsiveness of the system suffers.
- Stability Concerns:
Lag compensators act similarly to proportional-integral (PI) controllers. While they help with steady-state error, they can also negatively impact the system's stability, especially if not tuned properly.
Why Option B is NOT a Disadvantage
- Transient Response Misconception:
Option B states that the reduction in bandwidth gives shorter rise time and settling time, which is incorrect. In reality, the reduced bandwidth leads to longer rise and settling times. Thus, this statement contradicts the fundamental behavior of lag compensators.
Conclusion
In summary, option B does not accurately represent a disadvantage of lag compensators. Instead, it misrepresents the effects of bandwidth reduction, which actually results in longer response times rather than shorter ones. Understanding these nuances is crucial for effective control system design.
Lag compensators are used in control systems to improve stability and steady-state error. However, they come with certain disadvantages that affect system performance.
Disadvantages of Lag Compensators
- Bandwidth Reduction:
Lag compensators typically reduce the bandwidth of the system. This is because they shift the gain crossover frequency to a lower point, which can lead to slower response times.
- Longer Response Times:
The decrease in bandwidth results in a longer system response, characterized by slower rise times and settling times. This means that while the steady-state error might be improved, the overall responsiveness of the system suffers.
- Stability Concerns:
Lag compensators act similarly to proportional-integral (PI) controllers. While they help with steady-state error, they can also negatively impact the system's stability, especially if not tuned properly.
Why Option B is NOT a Disadvantage
- Transient Response Misconception:
Option B states that the reduction in bandwidth gives shorter rise time and settling time, which is incorrect. In reality, the reduced bandwidth leads to longer rise and settling times. Thus, this statement contradicts the fundamental behavior of lag compensators.
Conclusion
In summary, option B does not accurately represent a disadvantage of lag compensators. Instead, it misrepresents the effects of bandwidth reduction, which actually results in longer response times rather than shorter ones. Understanding these nuances is crucial for effective control system design.
Free Test
FREE
| Start Free Test |
Community Answer
Which of the following is NOT the disadvantage of lag compensator in a...
Advantages of Lag Compensator:
- A phase lag network offers high gain at low frequency. Thus, it performs the function of a low pass filter.
- The introduction of this network increases the steady-state performance of the system.
- The lag network offers a reduction in bandwidth and this provides longer rise time and settling time and so the transient response.
- The angular contribution of the pole is more than that of the compensator zero because the pole dominates the zero in the lag compensator.
Advantages of Lead Compensator:
- It improves the damping of the overall system.
- The enhanced damping of the system supports less overshoot along with less rise time and settling time. Therefore, the transient response gets improved.
- The addition of a lead network improves the phase margin.
- A system with a lead network provides a quick response as it increases bandwidth thereby providing a faster response.
- Lead networks do not disturb the steady-state error of the system.
- It maximizes the velocity constant of the system.
|
Explore Courses for Electrical Engineering (EE) exam
|
|
Similar Electrical Engineering (EE) Doubts
Top Courses for Electrical Engineering (EE)View all
Question Description
Which of the following is NOT the disadvantage of lag compensator in a control system?a)In lag compensator, the attenuation offered by it shifts the gain crossover frequency to a lower point, thereby decreasing the bandwidth.b)The lag network offers a reduction in bandwidth, and this gives shorter rise time and settling time and so the transient response.c)A lag compensator somewhat acts as a proportional plus integral controller, hence adversely affects the stability of the system.d)Though the system response is longer due to decreased bandwidth, the response is quite slowCorrect answer is option 'B'. Can you explain this answer? for Electrical Engineering (EE) 2025 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about Which of the following is NOT the disadvantage of lag compensator in a control system?a)In lag compensator, the attenuation offered by it shifts the gain crossover frequency to a lower point, thereby decreasing the bandwidth.b)The lag network offers a reduction in bandwidth, and this gives shorter rise time and settling time and so the transient response.c)A lag compensator somewhat acts as a proportional plus integral controller, hence adversely affects the stability of the system.d)Though the system response is longer due to decreased bandwidth, the response is quite slowCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following is NOT the disadvantage of lag compensator in a control system?a)In lag compensator, the attenuation offered by it shifts the gain crossover frequency to a lower point, thereby decreasing the bandwidth.b)The lag network offers a reduction in bandwidth, and this gives shorter rise time and settling time and so the transient response.c)A lag compensator somewhat acts as a proportional plus integral controller, hence adversely affects the stability of the system.d)Though the system response is longer due to decreased bandwidth, the response is quite slowCorrect answer is option 'B'. Can you explain this answer?.
Which of the following is NOT the disadvantage of lag compensator in a control system?a)In lag compensator, the attenuation offered by it shifts the gain crossover frequency to a lower point, thereby decreasing the bandwidth.b)The lag network offers a reduction in bandwidth, and this gives shorter rise time and settling time and so the transient response.c)A lag compensator somewhat acts as a proportional plus integral controller, hence adversely affects the stability of the system.d)Though the system response is longer due to decreased bandwidth, the response is quite slowCorrect answer is option 'B'. Can you explain this answer? for Electrical Engineering (EE) 2025 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about Which of the following is NOT the disadvantage of lag compensator in a control system?a)In lag compensator, the attenuation offered by it shifts the gain crossover frequency to a lower point, thereby decreasing the bandwidth.b)The lag network offers a reduction in bandwidth, and this gives shorter rise time and settling time and so the transient response.c)A lag compensator somewhat acts as a proportional plus integral controller, hence adversely affects the stability of the system.d)Though the system response is longer due to decreased bandwidth, the response is quite slowCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following is NOT the disadvantage of lag compensator in a control system?a)In lag compensator, the attenuation offered by it shifts the gain crossover frequency to a lower point, thereby decreasing the bandwidth.b)The lag network offers a reduction in bandwidth, and this gives shorter rise time and settling time and so the transient response.c)A lag compensator somewhat acts as a proportional plus integral controller, hence adversely affects the stability of the system.d)Though the system response is longer due to decreased bandwidth, the response is quite slowCorrect answer is option 'B'. Can you explain this answer?.
Solutions for Which of the following is NOT the disadvantage of lag compensator in a control system?a)In lag compensator, the attenuation offered by it shifts the gain crossover frequency to a lower point, thereby decreasing the bandwidth.b)The lag network offers a reduction in bandwidth, and this gives shorter rise time and settling time and so the transient response.c)A lag compensator somewhat acts as a proportional plus integral controller, hence adversely affects the stability of the system.d)Though the system response is longer due to decreased bandwidth, the response is quite slowCorrect answer is option 'B'. Can you explain this answer? in English & in Hindi are available as part of our courses for Electrical Engineering (EE).
Download more important topics, notes, lectures and mock test series for Electrical Engineering (EE) Exam by signing up for free.
Here you can find the meaning of Which of the following is NOT the disadvantage of lag compensator in a control system?a)In lag compensator, the attenuation offered by it shifts the gain crossover frequency to a lower point, thereby decreasing the bandwidth.b)The lag network offers a reduction in bandwidth, and this gives shorter rise time and settling time and so the transient response.c)A lag compensator somewhat acts as a proportional plus integral controller, hence adversely affects the stability of the system.d)Though the system response is longer due to decreased bandwidth, the response is quite slowCorrect answer is option 'B'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
Which of the following is NOT the disadvantage of lag compensator in a control system?a)In lag compensator, the attenuation offered by it shifts the gain crossover frequency to a lower point, thereby decreasing the bandwidth.b)The lag network offers a reduction in bandwidth, and this gives shorter rise time and settling time and so the transient response.c)A lag compensator somewhat acts as a proportional plus integral controller, hence adversely affects the stability of the system.d)Though the system response is longer due to decreased bandwidth, the response is quite slowCorrect answer is option 'B'. Can you explain this answer?, a detailed solution for Which of the following is NOT the disadvantage of lag compensator in a control system?a)In lag compensator, the attenuation offered by it shifts the gain crossover frequency to a lower point, thereby decreasing the bandwidth.b)The lag network offers a reduction in bandwidth, and this gives shorter rise time and settling time and so the transient response.c)A lag compensator somewhat acts as a proportional plus integral controller, hence adversely affects the stability of the system.d)Though the system response is longer due to decreased bandwidth, the response is quite slowCorrect answer is option 'B'. Can you explain this answer? has been provided alongside types of Which of the following is NOT the disadvantage of lag compensator in a control system?a)In lag compensator, the attenuation offered by it shifts the gain crossover frequency to a lower point, thereby decreasing the bandwidth.b)The lag network offers a reduction in bandwidth, and this gives shorter rise time and settling time and so the transient response.c)A lag compensator somewhat acts as a proportional plus integral controller, hence adversely affects the stability of the system.d)Though the system response is longer due to decreased bandwidth, the response is quite slowCorrect answer is option 'B'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice Which of the following is NOT the disadvantage of lag compensator in a control system?a)In lag compensator, the attenuation offered by it shifts the gain crossover frequency to a lower point, thereby decreasing the bandwidth.b)The lag network offers a reduction in bandwidth, and this gives shorter rise time and settling time and so the transient response.c)A lag compensator somewhat acts as a proportional plus integral controller, hence adversely affects the stability of the system.d)Though the system response is longer due to decreased bandwidth, the response is quite slowCorrect answer is option 'B'. Can you explain this answer? tests, examples and also practice Electrical Engineering (EE) tests.
|
|
Explore Courses for Electrical Engineering (EE) exam
|
|
Signup to solve all Doubts
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
|
Signup on EduRev and stay on top of your study goals
10M+ students crushing their study goals daily