PhD Defense by Jacob P. Misch

Event Details
  • Date/Time:
    • Thursday November 12, 2020
      2:00 pm - 4:00 pm
  • Location: Remote: Blue Jeans
  • Phone:
  • URL: Bluejeans
  • Email:
  • Fee(s):
  • Extras:
No contact information submitted.

Summary Sentence: Mechanical Performance Characterization of Manual Wheelchairs Using Robotic Wheelchair Operator with Intermittent Torque-Based Propulsion

Full Summary: No summary paragraph submitted.

Jacob P. Misch

BioE Ph.D. Dissertation Defense

Thursday, November 12, 2020, 2:00 p.m.

(College of Computing, Room 027)


Committee:       Dr. Stephen Sprigle, Advisor (ME, ID, Georgia Institute of Technology)
Dr. Aldo Ferri (ME, Georgia Institute of Technology)
Dr. Frank Hammond (BME, Georgia Institute of Technology)
Ramakant Rambhatla, MBA (Invacare Corp.)
Dr. Sharon Sonenblum (ME, Georgia Institute of Technology)


Mechanical Performance Characterization of Manual Wheelchairs Using Robotic Wheelchair Operator with Intermittent Torque-Based Propulsion


The current manual wheelchair design process lacks consistent and objective connection to performance-based metrics. The goal of this research was to empirically assess over-ground manual wheelchair performances and identify important design trade-offs through the use of a robotic apparatus with a novel cyclic propulsion control method. This research had four specific aims: 1) to design, implement, and validate torque-based propulsion to emulate the intermittent human propulsion cycle with an existing robotic wheelchair tester, 2) to investigate the influence of incremental mass additions to the wheelchair frame on over-ground propulsion characteristics, 3) to demonstrably improve the performance of a representative high-strength lightweight wheelchair by leveraging existing component-level test results, and 4) to characterize the mechanical performances of representative folding and rigid ultra-lightweight wheelchair frames. The outcomes of this research include an objective, repeatable, and validated test method to assess over-ground performances of manual wheelchairs in realistic contexts of use, as well as insight on the mechanics of the system that were previously under-studied or confounded by variabilities within human subject testing. Controlled propulsion tests are used to identify differences between wheelchair configurations. The outcome variable of propulsion cost represents the energetic requirements of propelling each chair a given distance and has direct relevance to manufacturers, clinicians, and wheelchair users alike. Ultimately, these outcomes will inform clinicians and manufacturers about how configuration choices influence propulsive efforts, which can be used in turn to improve their classification techniques and existing design processes. This knowledge will additionally empower wheelchair users to make informed choices during the wheelchair selection process based on objective mechanical performance metrics.

Additional Information

In Campus Calendar

Graduate Studies

Invited Audience
Faculty/Staff, Public, Graduate students, Undergraduate students
Phd Defense
  • Created By: Tatianna Richardson
  • Workflow Status: Published
  • Created On: Oct 29, 2020 - 1:09pm
  • Last Updated: Oct 29, 2020 - 1:09pm