Team Vision for System-Level Design PhasePlan:
- Obtain quantifiable data of input force required for constant rotation and impact force needed to drill effectively
- Perform a functional decomposition on the rock drill
- Perform a feasibility analysis on capable human power generation
- Create a morphological chart with concepts for each function
- Create a Pugh chart to compare concept selections to a chosen datum
- Revise the risk management table based on selected concept
- Test an electric hammer drill on a rock specimen
- Test an electric rotary hammer drill on a rock specimen and compare it to the hammer drill
- Select the best option based on morphological table, Pugh chart, and concept selection chart
- Get an idea of prices for each component in all possible concepts
- Create a future plan
- Our team achieved all of our goals for the systems design phase
BenchmarkingOne electric rotary hammer drill and two electric drills were tested experimentally on a rock.
The electric drills without the hammer motion were very slow and ineffective at drilling a hole in the rock. A 0.5" drill bit was tested and after 2 minutes of drilling the bit would not go deeper than 0.25".
The rotary hammer drill was much faster and easier to use. Using a 0.5" bit, we were able to drill about 1" deep in 1 minute. Using a 1 1/8" bit, we were able to drill about 1/8" deep in 30 seconds.
Feasibility: Prototyping, Analysis, Simulation
Morphological Chart, Concept Development and Concept Selection
[Document owned by Jillian Mammino]
Concept SelectionThe team completed two different pugh charts:
Pugh Chart 1:
Pugh Chart 2:
It can be noted that in both charts, there is a design which ranks 0 (equal) to the datum chosen.
Designs and Flowcharts
Design Review Materials
Research compiled during this stage of the project can be found here
A screencap of the pre-read email send prior to the systems design review can be found here
Plans for next phase
- As a team, where do you want to be at your next review? What questions will you answer during the next phase?
Wyatt Schie here