System Block Diagrams Introduction Week 5

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 Open Loop vs Closed Loop Systems

For this week I chose system block diagrams because my ECE 103 class and, moreover, my ECE 294 class use system block diagrams, and people, including me, are unfamiliar with them, so I chose to research system block diagrams. Differing block diagrams are open loop and closed loop systems. Both, open loop and closed loop systems, have similarities. Any control system will take and process an input and generate an output. Internally, control systems are divided into two sections: the controller section and process section. The controller section controls the amount of input required to process an input. The process section processes the input to generate the output. Despite similarities, open loop systems have unique characteristics. Regarding open loop systems, the reference point is independent to the output. No feedback signal that indicates how to vary the input to get the desired output exists. For example, a toaster does not know when the bread is toasted to the desired amount; Instead, the user's experience aids in knowing either how long to set the timer for or when to manually turn off the toaster. Benefits of an open loop system include simple construction, cheap, and useful for difficult to measure outputs. Disadvantages include, bad for handling disturbances and not reliable for most situations. Closed loop systems too have unique characteristics. Regarding a closed loop system, the output is measured continuously and goes back to the input. The feedback helps deal with disturbances. For example, an air conditioner knows when to stop by measuring the temperature in the room and turns on and off accordingly. Advantages of a closed loop system include high accuracy and reliability. Disadvantages include complex construction and costs. In conclusion, the distinguishing factor between an open loop system and a closed loop system is the feedback which creates advantages and disadvantages.

UPDATE (Circuit Board Block Diagram)




Here, we made a block diagram; we included what we currently have. The block diagram contained the ports for devices that we would later use to collect data. Additionally, we included the multiplexer that the ports are connected to. The multiplexer receives voltages from the 7.5-volt battery NOT the ports. Furthermore, we included the analog/digital converter, processor (Arduino), and memory which is an example of an open loop system since the multiplexer only outputs the voltage. The multiplexer receives the voltage and sends it to the analog/digital converter. The analog/digital converter sends the voltage to the processor (Arduino) which processes it and produces an output. The output goes to the memory and vice versa. This is an example of a closed loop system. The processor outputs information the memory and the memory gives back feedback that tells the processor the current state of the circuit board (power out or not, data collected per second, etc...). In addition, we included the LED that communicates the payloads current state via flashes per cycle. Lastly, we included a 6-pin modern hook up and USB. The USB connects the circuit board to the laptop via cable which can be unplugged before flight. Additionally, we added the accelerometers to measure the acceleration. Furthermore, we added two temperature sensors which would later be four in ports zero to four. The applied system block diagram proves to work as you can see by the light bulb flashing and the temperature collected from the circuit board using the sensors. Our block diagram included what we currently had.





Comments

  1. EricaOctober 13, 2022 at 5:29 PM

    Nice blog, but keep in mind with blogs like these you need to cite your sources.

    ReplyDelete
    Replies
    1. Genaro RiveraOctober 14, 2022 at 10:22 PM

      I forgot to site the source, and I am struggling to find it. Since this is due by midnight, I decided to do something different with system block diagrams. You can see the post for the updates. I hope the explanation and me actually applying the system block diagram in real life counts as proof enough.

      Delete
    2. EricaOctober 17, 2022 at 6:31 PM

      Yes, you're all good Genaro. Thank you.

      Delete

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