P17007: Motor-Assisted Wheelchair 2.0
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Systems Design

Table of Contents

Team Vision for System-Level Design Phase

Our goals for this phase were to:

During this phase we accomplished:

Functional Decomposition

Functional Decomposition was used to help develop a better understanding of how we are going to accomplish the task. At it's highest level, it answers the question "why?" and at each successive step down the chart, it begins answering the question "how?." This allows the ability to understand how each requirement will be met to eventually reach the end goal; a working wheelchair assistive device.
P17007 Functional Decomposition Flowchart

P17007 Functional Decomposition Flowchart

Benchmarking

The following benchmarking process was performed to help develop an understanding of the various features of the existing prototype and how they compare to other products already existing on the market.
P17007 Benchmarking

P17007 Benchmarking

Concept Development

The following concepts were individually brainstormed and the key features of each concept are discussed below. These are preliminary designs meant to suggest improvements from the previous design prototype as well as add important features that will increase the functionality of the device. When beginning the detailed design stage, we plan to utilize the positive features decided upon in these concepts.
P17007 Concept 1

P17007 Concept 1

P17007 Concept 2

P17007 Concept 2

P17007 Concept 3

P17007 Concept 3

Feasibility: Preliminary Test Plans

Before the completion of the design and prototype, it is crucial to have an understanding of the metrics that will be tested. The following table discusses various tests and how the tests will be performed.
P17007 Preliminary Test Plans

P17007 Preliminary Test Plans

Morphological Chart and Concept Selection

The morphological chart below was used at the beginning of our concept selection to ensure that all possibilities were considered. When considering designs, each section of this chart was used to help select a feature that will be included in the final design.
P17007 Morphological Chart

P17007 Morphological Chart

Concept Selection Criteria

Selection Criteria:

Pugh Analysis

Pugh analysis was used to compare our concept selection criteria with each of the preliminary design concepts in a quantitative manner.

It is important to note then when using the previous prototype as the datum, several of our concepts appear to be superior. This is to be expected, as the goal of the prototype being developed is to improve upon the design created by P16007.

P17007 Pugh Analysis 1

P17007 Pugh Analysis 1

P17007 Pugh Analysis 2

P17007 Pugh Analysis 2

P17007 Pugh Analysis 3

P17007 Pugh Analysis 3

P17007 Pugh Analysis 4

P17007 Pugh Analysis 4

Systems Architecture

P17007 Control System Architecture

P17007 Control System Architecture

P17007 Basic Electrical Schematic

P17007 Basic Electrical Schematic

Designs and Flowcharts

P17007 Systems Flowchart

P17007 Systems Flowchart

Risk Assessment

P17007 Risk Assessment

P17007 Risk Assessment

Design Review Materials

System Design Review Notes

Customer Interview Notes

Full List of Customer Interview Notes

Plans for next phase

Team Vision for Next Phase:

Individual Plans for Next Phase: Individual Plans for Next Phase


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