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A Two Degrees-of-Freedom Floor-Based Robot for Transfer and Rehabilitation Applications

Published: November 27, 2025 | arXiv ID: 2511.22705v1

By: Ian Lalonde , Jeff Denis , Mathieu Lamy and more

Potential Business Impact:

Helps people stand up easier, safely.

Business Areas:
Assistive Technology Health Care

The ability to accomplish a sit-to-stand (STS) motion is key to increase functional mobility and reduce rehospitalization risks. While raising aid (transfer) devices and partial bodyweight support (rehabilitation) devices exist, both are unable to adjust the STS training to different mobility levels. Therefore, We have developed an STS training device that allows various configurations of impedance and vertical/forward forces to adapt to many training needs while maintaining commercial raising aid transfer capabilities. Experiments with healthy adults (both men and women) of various heights and weights show that the device 1) has a low impact on the natural STS kinematics, 2) can provide precise weight unloading at the patient's center of mass and 3) can add a forward virtual spring to assist the transfer of the bodyweight to the feet for seat-off, at the start of the STS motion.

Page Count
13 pages

Category
Computer Science:
Robotics