P18043: Tremor Mitigation DAQ
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Customer Handoff & Final Project Documentation

Table of Contents

Team Vision for Final Demo and Handoff

For this phase we wanted to complete the following actions:

Test Results Summary

In this phase, we were able test on both a person with ET and a person without ET. The data for the person with ET can be downloaded here, and the data for the person without ET can be downloaded here. Each patient was required to do three movements. These are the movements that were required to be tested by our customer requirements. These movements are a baseline (arm held out), wrist flexion and extension, radial and ulnar deviation, and wrist supination and pronation. Each of the movements was performed three times and a baseline was again taken after all of tests were performed. The following plots are just a small sample of the data taken, and show the general results of our testing. The plots below show data for when both patients were required to wrist supination and pronation movements.

Frequency

The plots directly below are scalograms that from the Continous Wavelet Transform of the Angular Acceleration show the frequency of the tremor the patient was experiencing, if they were experiencing one at all. To read the plot the x-axis is the time during the test, y-axis is the frequency, and the color of the area depends on the magnitude of the vibration. Frequencies where tremors were present will be areas that are not blue, and the most severe tremors will be at locations that are yellow to red.
ET Patient Scalogram

ET Patient Scalogram

Non-ET Patient Scalogram

Non-ET Patient Scalogram

By comparing the plots it is clear with ET patient the majority of the frequency content is centered around 8 Hz. This caused by Essential Tremor, and it is in the expected 3-12 Hz frequency range. The frequency content for the person without ET is caused by the motion performed during the test. Plots that looked like this were common for each test performed. These plots were formed by linear acceleration and angular acceleration values.

Acceleration

In the following plots, angular acceleration for the tremor seen in the scalogram are examined. The first two plots are the separated plots, and the third plot is the two plots combined with each other to give a better idea of the motion of an ET compared to a person without ET.
ET Patient Angular Acceleration about the X-Axis

ET Patient Angular Acceleration about the X-Axis

Non-ET Patient Angular Acceleration about the X-Axis

Non-ET Patient Angular Acceleration about the X-Axis

Combined Patient Angular Acceleration about the X-Axis

Combined Patient Angular Acceleration about the X-Axis

EMG

Lastly, EMG signals were also taken for the tests conducted. The following are plots showing the EMG signals corresponding to the motion seen in the plots above.
ET Patient EMG Data

ET Patient EMG Data

Non-ET Patient EMG Data

Non-ET Patient EMG Data

Summary

A link to our engineering requirements with a performance vs requirements analysis is here.

Risk and Problem Tracking

The following two links go to our Risk Management and Problem Tracking documents. The majority of our risks have been driven to 0. The few exceptions have to do with risks that are ongoing. One of these risks is that we had no way to benchmark our device against a know movement source, and the others have to do with minor risks associated with the construction of the device. Future teams, should work to minimize these ongoing risks.

Final Project Documentation

The following links go to our team's final documents. These documents are our technical paper, our poster, design documents, CAD schematics, BOM, Manual, software, and recommendations for future teams.

Functional Demo Materials

The following are links to our Functional Demo and Customer Hand-Off materials.

Plans for Wrap-up

The following are the only remaining items for project completion

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