Which of the following statement is correct or any closed loop system?
||Which of the following statements is correct for any closed loop system ?
||All the co-efficients are always non-zero
||Only one of the static error co-efficients has a finite non-zero value
||None of the above
|Answer» c. Only one of the static error co-efficients has a finite non-zero value
Which of the following is a closed loop control system?
Detailed Solution. Auto pilot for an aircraft is closed loop system and remaining all are open loop systems.
What is closed loop system?
A closed loop control system is a mechanical or electronic device that automatically regulates a system to maintain a desired state or set point without human interaction.
Which of the following is an example of an closed loop control system?
The thermostat heater is an example of closed loop control system. The thermostat senses the temperature of the system and maintains the temperature.
Which of the following are the not characteristics of the closed loop systems *?
||Which of the following are the not characteristics of the closed loop systems?
||it does not involve output measurements
||it does not has the ability to control the system transient response
|Answer» d. it does not has the ability to control the system transient response
Which of the following statements is correct for a system with gain margin?
Right Answer is: Gain margin (GM): The gain margin of the system defines by how much the system gain can be increased so that the system moves on the edge of stability. A large gain margin or a large phase margin indicates a very stable feedback system but usually a very sluggish response.
Which of the following is the example of closed loop system Mcq?
Closed-loop control system: These are the systems in which the control action depends on the output. These systems have a tendency to oscillate. Ex: Temperature controllers, speed control of the motor, systems having sensors, Human eye, etc.
What are the features of closed loop system?
Then we can define the main characteristics of Closed-loop Control as being: To reduce errors by automatically adjusting the systems input. To improve stability of an unstable system. To increase or reduce the systems sensitivity.
Which of the following is an example of closed loop?
Solution : An ice water filled airtight metallic bottle is an example of a closed system.
Which of the following are the disadvantages of a closed loop control system Mcq?
Disadvantages of closed loop control systems:
- The closed loop systems are complex and costly.
- The feedback in closed loop systems may lead to oscillatory response.
- The feedback reduces the overall gain of the system.
Which statement is not correct for open loop control system?
The non-feedback system doesn’t facilitate the process of automation. Open-loop systems are inaccurate in nature and also unreliable. If their output is affected by some external disturbances, there is no way to correct them automatically as these are non-feedback systems.
Which among the following represents an illustration of a closed loop system?
Explanation: Closed loop control system is the system with the positive or negative feedback and this is made so as to avoid the disadvantages of open loop control system and in the above options automatic washing machine represents closed loop system.
Which of the following statements is correct for a system with gain margin close to unit or a phase margin close to zero?
Detailed Solution If the gain margin is close to unity or the phase margin is close to zero, then the system is oscillatory.
Which of the following statements is correct for a system with gain margin close to unity or a?
||Which of the following statements is correct for a system with gain margin close to unity or a phase margin close to zero ?
||the system is highly stable
||the system is highly oscillatory
||none of the above
|Answer» c. the system is highly oscillatory
Which of the statements are the advantages of closed loop systems over the open loop system?
Correct Answer : The transient response in closed loop system decays more quickly than in open loop system.