- 1. Open-loop systems
- are simple and inexpensive
- are more accurate and less sensitive to noise, disturbances
- can compensate for disturbances
- all of the above are true
- Select the False statement.
- Any control system that operates on a time basis is open loop.
- The output power rating partially determines the cost, weight, and size of a control system.
- The number of components used in a closed-loop control system is less than that for a corresponding open-loop control system.
- Relatively inaccurate and inexpensive components can be used to obtain the accurate control of a given plant using closed loop configuration.
- True statement?
- Any control system that operates on an event basis is closed loop.
- A time driven task involves open loop while an event driven task involves closed loop.
- The self-correcting aspect of closed-loop control makes it preferable over open-loop control.
- All are true.
- Application(s) for feedback control systems is (are)
- Guided missiles
- Automatic gain control in radio receivers
- Satellite tracking antenna
- All of the above
- Early application(s) of feedback control include(s) which of the following?
- Watt's flyball governor
- Water clock of Ktesibios
- Drebbel's temperature regulator
- All of the above
- Important modern application(s) of control system include(s) which of the following?
- Fuel-efficient and safe automobiles
- Autonomous robots
- Automated manufacturing
- All of the above
- Sometimes feedback systems are not used because:
- They are not accurate
- They are more complex and more expensive
- They cannot compensate for disturbances
- They are sensitive to noise, disturbances
- Closed-loop systems
- are more complex and more expensive
- are more accurate and less sensitive to noise, disturbances
- can compensate for disturbances
- all of the above are true
- A good closed-loop control system has which of the following properties:
- Good regulation against disturbances and high stability
- Desirable and accurate responses to inputs
- Low sensitivity to variations in the plant parameters
- All of the above
- Which is TRUE for Closed-loop systems?
- They have large bandwidth
- They have reduced effect of non-linearities and distortions
- Stability is the major consideration from design point of view
- All of the above are true
