Graduation Year

2020

Document Type

Thesis

Degree

M.S.M.E.

Degree Name

MS in Mechanical Engineering (M.S.M.E.)

Degree Granting Department

Mechanical Engineering

Major Professor

Redwan Alqasemi, Ph.D.

Co-Major Professor

Rajiv Dubey, Ph.D.

Committee Member

Sudeep Sarkar, Ph.D.

Keywords

Eye Fixation, Jacobian, Prosthesis, Resolved Rate, Singularity Robust

Abstract

There are more than 350000 amputees in the US who suffer loss of functionality in their daily living activities, and roughly 100000 of them are upper arm amputees. Many of these amputees use prostheses to compensate part of their lost arm function, including power prostheses. Research on 6-7 degree of freedom powered prostheses is still relatively new, and most commercially available powered prostheses are typically limited to 1 to 3 degrees of freedom. Due to the myriad of possible options for various powered protheses from different manufacturers, each configuration is governed by a distinct control scheme typically specific to the manufacturer. The user will then have to be accustomed to its custom control scheme to be able to use such protheses for ADL tasks. Control of available powered prosthesis options utilize different strategies such as individual joint control, partial endpoint control, or switching between different modes that is mentally demanding for the user leading to possible abandonment of such devices in favor of more passive systems. To overcome such issues, a novel resolved rate algorithm using Cartesian control was developed for universal use by having the user specify where the end effector must go through visual targeting. This is achieved by utilizing an augmented reality device “Magic Leap” to provide the spatial targeting information to the controller, which will then autonomously move the end effector to the targeted location. This controller system is simulated on a virtual humanoid arm model and tested on a Human Arm Robotic Unit, which is the hardware version of the arm model.

Download

Share

COinS