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Presentation.pptx
- 1. Introduction An electricalcontrol system is a physical interconnection of devices that influences the behavior of other devices or systems. A simple electronic system is made up of an input, a process, and an output. Both input and output variables to the system are signals. Examples of such systems include circulation pumps, compressors, manufacturing systems, refrigeration plant and motor control panels
- 2. Open loop controlsystem An open loop control system is one in which the output does not feedback to the input to correct variations. Instead, the output is varied by varying the input. This means that external conditions will not impact on the system output. An example is a timer controlled central heating boiler which is switched on between certain preset times regardless of the thermal comfort level of the building.
- 3. The benefitsof open loop systems are that they are simple, easy to construct and generally remain stable. However, they can be inaccurate and unreliable due to the output not being corrected automatically
- 4. A closedloop control system is one in which the output has an effect upon the input to maintain a desired output value. It achieves this by providing a feedback loop. For example, a boiler may have a temperature thermostat which monitors the thermal comfort level of a building and sends a feedback signal
- 5. Conclusion In summary,we have discussed open-loop and closed-loop control system. We have created open and closed loop systems by using MATLAB scripts and SIMULINK and we observed output of created systems. We have learned creating open loop and closed loop control systems and determined differences between the systems.