Assistive Technology

Tremor online characterization + voluntary motion filtering

Demo of proposed real-time algorithm to characterize pathological tremor, while filtering voluntary motion components. The main application of this algorithm is on active tremor compensation systems.

Using FES to control joint dynamics: system identification

In this demo we show an experiment to estimate both passive and active parameters of the wrist joint controlled by surface electrical stimulation.

Tremor compensation using FES: co-contraction to increase joint stability

Demo of a tremor compensation system using electrical stimulation. Based on information from portable sensors, the controller applies higher currents for stronger tremors. Tremor is induced with an auxiliary stimulator.

Webcam as input for virtual keyboard

This video by Carlos Gonçalves demonstrates the operation of a virtual keyboard using a regular webcam and readings of the user's head movement. The idea is to design an input system for people with impairments that cannot use conventional mouse or keyboard. Following developments include more robust techniques to detect command gestures.