P16007: Motor-Assisted Wheelchair
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Integrated System Build & Test with Customer Demo

Table of Contents

Team Vision for System Level Demo with Customer

During this phase we sought to

During this phase we managed to

Mechanical Strength Analysis

Part (made of 1/8 steel plate) Strength Analysis

Normal Load Analysis

public/MSD II - Integrated System Build %26 Test with Customer Demo Documents/One Eighth Stress Analysis.jpg

Failure Analysis

public/MSD II - Integrated System Build %26 Test with Customer Demo Documents/One Eighth Stress Failure Analysis.jpg

Strength Analysis

Normal Load Analysis

public/MSD II - Integrated System Build %26 Test with Customer Demo Documents/Box Analysis.jpg

In COMSOL Multiphysics

Failure Analysis

public/MSD II - Integrated System Build %26 Test with Customer Demo Documents/Box Failure Analysis.jpg

The idea is to increment the loaded force until the total stress falls within 52 MPA (PVC ultimate stress)

Storing Scenario Analysis

public/MSD II - Integrated System Build %26 Test with Customer Demo Documents/Free Body Diagram.jpg

public/MSD II - Integrated System Build %26 Test with Customer Demo Documents/Box Scenario Analysis.jpg

Failure Analysis of Scenario

public/MSD II - Integrated System Build %26 Test with Customer Demo Documents/Box Scenario Failure Analysis.jpg

The idea is to increment the loaded force until the total stress falls within 52 MPA (PVC ultimate stress)

Mechanical Subsystem Assembly

Made the parts, grind, drilled holes, ready to weld.

Battery Box Layout

We velcroed the batteries and the box so the batteries would stay in the box and not move around easily. The small circuit was also velcroed on the box but was not used for demonstration this phase. As one can see in the picture the small velcro will be where the circuit will go.

public/MSD II - Integrated System Build %26 Test with Customer Demo Documents/Battery_Velcro.jpgpublic/MSD II - Integrated System Build %26 Test with Customer Demo Documents/Small_Circuit.jpg

public/MSD II - Integrated System Build %26 Test with Customer Demo Documents/Battery_Box_Layout.jpg

Plugs

There was two main plugs designed so the user could remove the controls or remove the motor, batteries and battery box when the user wanted. The first picture shows the controls plug that has the PWM and the Rocker Switch. It will also connect to the E-Stop however was not connected this phase because of demonstration purposes.

public/MSD II - Integrated System Build %26 Test with Customer Demo Documents/Controls_Plug.jpg

The second picture shows the other plug that will connect to the controls plug, and has the motor power plug, motor controller plug, the battery plug, fuse, and the feedback wire. The feedback wire doesn't have anything connected this phase because of demonstration purposes.

public/MSD II - Integrated System Build %26 Test with Customer Demo Documents/Motor_Plug.jpg

Fully Integrated System

The picture below shows the whole system integrated together. The things missing that we left out because it wasn't needed for demonstration purposes are the E-stop, battery monitor, buzzer, and circuit. We have tested all of them together and it does work when we have another switch which we are looking into either purchasing or finding.

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Risk and Problem Tracking

Plans for next phase

Team Vision

Individual Plan


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