P18044: Tremor Mitigation Device 2
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Subsystem Build & Test

Table of Contents

Team Vision for Subsystem Level Build & Test Phase

What did your team plan to do during this phase?

Mechanical Subteam:

Electrical/SW Subteam:

What did your team actually accomplish during this phase?

Mechanical Subteam:

Electrical/SW Subteam:

Test Results Summary

Purpose and Plan

Raw data from 9DOF sensor (gyroscope) was collected using drill powered test rig, operating at approximately 6.5 Hz. Two days of data collection were analyzed, each day containing data with brakes on and data with brakes off. Gyroscope data from tremoring axis (X) was converted into displacement using numeric integration and converted from rotational to linear displacement in MATLAB. The height peaks were determined using built in functionality with manual adjustment of threshold values. Our engineering requirements state that in order for the system to behaving within an acceptable level, the displacement with brakes on should be less than or equal to 75 % of the displacement with brakes off (stretch goal, 50% reduction).

Statistical Results

Conclusion

Based on the analysis performed, our brake system and control logic is performing to acceptable standards based on our engineering requirements with the rig tremoring about one axis.

Next Steps

The next steps will be to perform testing and analysis with more than one axis of tremor in play, either on the test rig from 18045, a modified rig, or with data from a live subject.

9-DOF Plots

Pictures of Test Rig

Test Plans and Engineering Requirements

 Updated Engineering Requirements and Test Plans with Adjusted Scope

Updated Engineering Requirements and Test Plans with Adjusted Scope

Engineering Requirements and Test Plan Documents

Updated BOM

 Indented BOM

Indented BOM

Updated Indented BOM Document

Risk and Problem Tracking

 Updated Risk Management

Updated Risk Management

Updated Risk Management Document

 Problem Tracking

Problem Tracking

Updated Problem Tracking Document

Functional Demo Materials

 Brake Housing CAD Drawing

Brake Housing CAD Drawing

3D PDF

 Assembly to Ball Bearing CAD Drawing

Assembly to Ball Bearing CAD Drawing

3D PDF

 Updated Complete CAD Drawing

Updated Complete CAD Drawing

3D PDF

Pictures of Machined Parts

Plans and vision going forward

Updated Vision for Imagine RIT

Our senior design project a wearable assistive medical device intended to mitigate Essential Tremor. Essential Tremor is a neuropathy that causes involuntary rhythmic muscle contraction which afflicts roughly 7 million Americans. A tremor typically manifests in the arm of the patient, and can progress up the arm and to the neck and voice box as the condition progresses. There are drug treatments that require constant monitoring, dosage adjustments, and can cause some unpleasant side effects. Curative deep brain stimulation procedures are also available, but the procedure is very invasive. Our device provides an alternative inexpensive, noninvasive option. The tremor is sensed with a 9 degree of freedom sensor on the hand. Restrictive braking forces are produced by bearing mounted electromagnetic brakes, which is controlled by a microcontroller operating with active feedback logic. Our team worked on the second iteration of this project. This year, we worked to make the design more robust and complete to improve its mitigation functionality. We are working in parallel with a tremor data acquisition device team, and a device test rig team.

Best Case:

Moderate Case:

Worst Case:

Imagine RIT Proposal

Vision for next phase review

For the next phase, the team plans to ...

 Project Plan

Project Plan

Project Plan

Individual Three Week Plans


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