Assignment 4

Problem Statement

To design an automatic dog door security cover that can be used to open and close doors mechanically with an electronic motor. This device will be able to be set on a timer so that anyone can schedule when the security door raises and lowers. The device will be able to accommodate any sized dog door from small to large. The device will be powered either by a gear used on the side or top that turns and opens the door via teeth on the security shield or a pully sytem powered by a winch and motor. It will be easy to install for the customer and will include all necessary components.

Assumptions

This device should work for any size animal except for in some extreme cases of animal sizes under the condition that the homeowner has the space by their dog door to accommodate for the space needed to house the shield when it is open. There is also the assumption that the owner will know how to set operate the timer or use a potential app to control the shield

Assumptions regarding the calculations are the assumpion that the security door will be made of polyeurethane which si the material used for the density as well as the coefficient of friction. Another assumption is that all motors will turn at 60 rpm

Pugh Decision Matrix

Pugh Decision Matrix

Through completing the Pugh Decision Matrix I was able to determine that the best strategy was the "Vertical Gear" option with the gear and motor moving the security door up and down. The "Pulley System" option came in second place but lacked in its feasibility of having enough space to install an entire pully system on top of the room already needed to install. The "Horizontal Gear" option was another close one however similar to the pulley sytem it needing twice as much room to the isde is something that may not be practical for everyone. Models of all of the systems with some calculations are provided below.

Models

Calculations 1

Calculations 2

This model does not include the wire that would connect the pully to the door, I honestly wasn't too sure how to do that in Creo so any feeedback from anyone would be helpful with that.

Calculations 3

Gantt Chart

Gantt Chart

FRDPARRC Tables

FRDPARRC

Lessons Learned

1. I learned that I defintiely need to brush up on my CAD skills because I heavily struggled with modeling these.

2. Learned more about Coding in HTML.

3. I finally learned the connections between the different design stages and how they realte to each other

Activites Date and Time

Met with Dr Fagan and learned more about the differences between design stages - 11/10/2020 - 11:00am - 11:15am

Completed Calculations for different modules - 11/10/2020 - 6:00pm - 7:30 pm

Created Creo Models and assemblys - 11/11/2020 - 4:00pm - 8:00pm

Created FRDPARRC table - 11/11/2020 9:00pm - 9:30pm

Created Decision matrix - 11/11/2020 9:30pm - 10:00pm

Transferred everything to website - 11/11/2020 10:30pm - 11:30pm

Checked advisee's webpages and made comments - 10/22/2020 - 12:15am - 12:45am

Comments for Advisees

Anna Devereaux

As of 12:20am your link for assignment 4 did not work

Ethan Fredheim

As of 12:30am there was no link for your assignment 4

Assignment 4A

Assignment 4a