This week we continued to work on the accelerometers, but found out it was a lot more complicated and had more issues than expected. We initially tried to use a door hinge mechanism to test the angle, but it varied as we moved it around. This was likely due to the fact that the acceleration of the accelerometers around by any movement could change the acceleration reading on the accelerometer. Thus there was an addition of error in the angle. After talking with Dr Klaesner about our problems, we realized that accelerometers would be a challenge to work with, as there were additional technical issues such as finding the constants to integrate from acceleration all the way to position, and dealing with complicated matrix math. Dr Klaesner suggested we use a potentiometer, which would be easier according to him. Chris and Galen are beginning to design a rotational potentiometer to test the angle. Galen will begin working on the CAD drawing in order to make the two rods that will attach the potentiometer at two different points. Chris will begin the coding process. On February 21, we talked with Dr. Yin about the change from accelerometer to potentiometer. He was okay with the change, but expressed concerns regarding stability as the potentiometer might move. The stability will likely decrease with the addition of the glove.
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April 2018
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