The Deliverable of P16371 MSD TeamIt's expected that this MSD team designs and constructs a device that is capable of meeting the customer requirements as outlined in the problem definition. Specifically, this means that the device must create a stable liquid meniscus, oscillate the meniscus at a frequency of approximately 100 Hz, be capable of utilizing multiple different working fluids, be able to interface with the other subsystems, and it must be reliable. In order to fulfill the customer requirements, it's also expected that the MSD team designs a computer program that allows for adequate control of the device. Therefore, upon completion of MSD II the customer will receive a device that meets his requirements along with a program that is capable of supplying the necessary controls. It's the customer's desire that the device which is being designed and constructed by this MSD team will enable him to conduct his doctoral research.
Team Vision for System Level Design Phase
Anticipated TasksFor the system level design phase, our team expected to accomplish the following tasks:
- Conduct additional benchmarking.
- Study journal articles and other literature published with relation to our project.
- Ensure that the customer requirements and engineering requirements align with one another.
- Divide subsystems among team members.
- Complete a preliminary system design.
- Continue to update EDGE with work.
- Bake a multitude of goodies.
- Participate in a team bonding bicycle ride.
Accomplished TasksThe following items are what our team actually accomplished during the system level design phase:
- Conducted additional benchmarking.
- Studied journal articles related to each subsystem.
- Created a house of quality.
- Updated and expanded the engineering requirements.
- Reviewed feedback from the problem definition presentation.
- Created a functional decomposition.
- Generated a list of concepts.
- Created a morphological chart.
- Created a Pugh chart.
- Identified and divided subsystems to individual team members.
- Conducted feasibility analysis.
- Realized that an ability to use The Force would make design much easier.
A PDF document of the functional decomposition can be accessed by clicking here.
An Excel Worksheet containing the budget shown above can be accessed by clicking here.
Oscillator(1) "Action of low frequency vibration on liquid droplets and particles" by Bennes et al
Brainstorming & Concept Generation
In order to develop a list of concepts that are capable of fulfilling the identified functions, each individual member of our MSD team developed his/her concepts independently. Then, we gathered as team and combined our concepts, and we also brainstormed some additional concepts. The results of our concept brainstorming are provided below.
An Excel Worksheet that contains the concepts displayed above can be accessed by clicking here.
Images of Concept GenerationThe chart provided below is a visual representation of our generated concepts.
An Excel Worksheet that contains the images for the morphological chart can be accessed by clicking here.
From the morphological chart provided above, and through many iterations, it was decided that the five concepts shown below demonstrated viable system level designs.
An Excel Worksheet that contains the final concept selections as determined from the morphological chart can be accessed by clicking here.
Selection Criteria & Pugh ChartIn order to determine the top design concept from the five concepts shown above, a Pugh chart was created that compared the following selection criteria:
- Ability for MSD team to complete in 2 semesters
- Ease of operation
- Ease of maintenance
It was found that the Red Concept was the top design. Thus, our MSD team will pursue the design outlined by the Red Concept.
Furthermore, the Pugh chart shown below compares the top two viable concepts for adjusting the height of the meniscus, i.e., via a crank or a motor, and it also compares the top two viable concepts for inducing oscillations, i.e., a piezo-electric actuator or a cone speaker. It was determined that the hand crank and cone speaker are the top designs for accomplishing their respective tasks.
An Excel Worksheet containing the Pugh chart can be accessed by clicking here.
An Excel Worksheet containing the feasibility analysis can be accessed by clicking here.
An Excel Worksheet containing the risks can be accessed by clicking here.
Design Review Materials
|Item||Link to document|
|Project readiness package||Click here.|
|Initial customer interview||Click here.|
|Team norms||Click here.|
|Systems level design presentation||Click here.|
|Presentation audio||Click here.|
|Presentation feedback||Click here.|
Plans for the Next PhaseIt's expected that the following tasks will be completed by the end of the next phase:
- Identify and solicit support from specific faculty members.
- Refine any requirements and/or functions as necessary.
- Create a functional decomposition for each subsystem.
- Generate more specifics for feasibility analysis.
- Demonstrate feasibility.
- Demonstrate proof of concept for each subsystem.
- Conduct preliminary engineering analyses for each subsystem.
- Bake more goodies and gain a few pounds from aforementioned goodies.