Consider the following statements regarding the advantages of closed-loop negative feedback control systems over open-loop systems:
Consider the following statements regarding the advantages of closed-loop negative feedback control systems over open-loop systems:
- The overall reliability of the closed-loop systems is more than that of the open-loop systems.
- The transient response in the closed-loop system decays more quickly than in the open-loop system.
- In an open-loop system, closing the loop increases the overall gain of the system.
- In the closed-loop system, the effect of variation of component parameters on its performance is reduced.
Right Answer is:
B and D
SOLUTION
Open Loop Control System:- When the control action of a system is independent of the output, the system is said to be an open-loop control system.
Closed-loop Control System:- If the control action is somehow dependent on the output, the system is called a Closed-loop or Feedback control system.
Difference Between Open-loop and Closed-Loop Control System
| Open Loop Control System | Closed-Loop Control System |
| In this system, the controlled action is free from the output | In this system, the output mainly depends on the controlled act of the system. |
| This control system is also called a Non-feedback control system | This type of control system is also called a feedback control system |
| The components of this system include a controlled process and controller. | The components of this kind of system include an amplifier, controlled process, controller, and feedback |
| The construction of this system is simple | The construction of this system is complex |
| The accuracy of this system mainly depends on the calibration | These are accurate due to feedback |
| The stability of these systems are stable | The stability of these systems are less stable |
| Sensitivity high | Less sensitive |
| The optimization in this system is not possible | The optimization in this system is possible |
| The transient response decay slowly | The transient response decay fast |
| The calibration of this system is difficult | The calibration of this system is easy |
| The disturbance of this system will be affected | The disturbance of this system will not be affected |
| These systems are non-linear | These systems are linear |
| The best examples of this control system are automatic washing machine, traffic light, TV remote, immersion rod, etc. | Examples of this kind of control system are AC, control systems for temperature, pressure and speed, toaster, and refrigerator |