3.1.6 Open and Closed Loops

1. We built the support system and track.

 2. We added the motor and gearbox. 

3. This is the program we made for the system.  

 4. N/A 

5. This is an open loop because there is nothing to provide feedback to the system.

 6. The gearbox would come to rest far to the right than it started. 

7. The process does have an inefficiency because it travels more one way than the other everytime the process is repeated. Also, if something slows the motor down one way, the motor will not adjust to keep the constant speed. 

8. Here is the flowchart.

9. This is a closed loop because it responds to feedback. 

10. This would be very precise because it would never get passed the mini-switches so it will alway have the same range of motion.

 11. Here is the flow chart for the third program.

CONCLUSION:

 1. A cell phone is an open loop system. The program starts when it recieves an incoming call and it ends when the "END" button is pressed. The system could benefit from feedback because hitting the end button ends the process and the end button is a feedback. 

2. An air conditioner is a closed loop system. The feedback it gets comes from a thermometer. If the temperature is higher than the set temperature, it will cool the house down until the set temperature is reached. If the temperature is lower than the set temperature, it will warm the house up until the set temperature is reached