P16080: Heart Pump
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Systems Design

Table of Contents

The System Design Phase

The systems design phase is where our team developed our initial concepts for design & evaluated their respective functionality, feasibility, risks, and more. The items below highlight our work throughout this 3 week cycle.

To see every document associated with our Systems Design Phase, please see our Systems Level Design Documents directory.

Functional Decomposition

Second draft of our functional decomposition

Second draft of our functional decomposition

See a link to our word document of our functional decomposition here

Benchmarking

As planned and mentioned during the problem definition phase, additional existing models of heart pumps were researched and observed.

Below are photos of some models observed (special thanks to Dr. Mix of University of Rochester, and Dr. Steven Day or RIT):

Dr. Mix Heart Model
Full view of the heart model

Full view of the heart model

Close up of valve

Close up of valve

Dr. Day Heart Model
Pressure control device

Pressure control device

Schematic of Dr. Day's Device

Schematic of Dr. Day's Device

Viewing these various models provided great insight to our team. Seeing how current models work allowed us to think of several concepts and brainstorm new ideas based off of what we now know is physically possible to create.

To view all photos from our existing model visits, see our Photo Gallery

Based off of our research, we created a pugh graph of existing models to help create a datum for use during our own concept selection.

 Pugh Graph of existing models

Pugh Graph of existing models

See our link to both .xlsx Pugh Charts

Concept Development & Morphological Chart

Purpose: Generate new concept options or combinations that can potentially exceed the benchmark concepts

Draft Morph Chart: Tabulated list of concepts based off of our Functional Decomposition

Draft Morph Chart: Tabulated list of concepts based off of our Functional Decomposition

See a link to the spreadsheet documenting our concept development for each function

Concept Selection

To pick one final, complete concept, our team had to decide on a list of selection criteria. We then looked at that generated list of criteria compared to our various concepts we generated.

Selection Criteria Generated Concepts
 Criteria for selection

Criteria for selection

 Concepts

Concepts


Finally, a Pugh chart was created based off of these two aspects, allowing us to rate each functions solution compared to the benchmark datum, Dr. Day's model. Ultimately, it was determined that concept 2 was the best choice, as outlined in the final Pugh chart below:

Pugh chart of plus & minus's, used as a visual in final concept selection

Pugh chart of plus & minus's, used as a visual in final concept selection

See our link to our .xlsx Pugh Charts

 Final Design selected by team, known as

Final Design selected by team, known as "Concept 2"

See photos of all 4 concepts in our Systems Level Design Documents repository.

Systems Architecture

 Second revision of System Architecture. This visual aid indicates where structure, material, energy, and information all flow through our design to satisfy the needs of this project.

Second revision of System Architecture. This visual aid indicates where structure, material, energy, and information all flow through our design to satisfy the needs of this project.

Feasibility: Prototyping, Analysis, Simulation

Feasibility Analysis was conducted on various valve options that will be explored. This is an important step in the development of design as valves play an important role in all our concepts

Feasibility Analysis was conducted on various valve options that will be explored. This is an important step in the development of design as valves play an important role in all our concepts

 Preliminary engineering analysis of our the heart's cardiac output. This is essentially what the final design will imitate

Preliminary engineering analysis of our the heart's cardiac output. This is essentially what the final design will imitate

Risk Assessment

At the end of the Systems Level Design Phase, many more risks became apparent and were updated accordingly. Our initial draft of risk management was updated from the Problem Definition Phase, and you can see this in the snapshot of our risk management below:

 Second draft of risk analysis, highlighting severity and likelihood. This allowed a numerical ranking to be assigned to each risk that is expected to be encountered at some point in MSD I & II.

Second draft of risk analysis, highlighting severity and likelihood. This allowed a numerical ranking to be assigned to each risk that is expected to be encountered at some point in MSD I & II.

See our live document here.

Design Review Materials

See our SLDR Presentation Powerepoint here

Plans for next phase

The plan for the next phase is outlined in the Gantt Chart below:


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