The long term goal of our laboratory is to restore walking and standing functions in persons with the sensory and motor deficits by using an active orthosis and a functional electrical stimulation (FES) device. Primarily, our focus is to design robust and optimal control methods that sustain walking and standing function for longer time duration. Currently, longer walking duration is not feasible due to the muscle fatigue associated with FES. Other than the invasive methods which recruit limb muscles more selectively and naturally, the walking duration can also be increased by: 1) using an active orthosis working in conjunction with a non-invasive FES device and 2) using an optimized control algorithm which is metabolically efficient and minimizes muscle fatigue associated with FES.

Research Highlights


Our paper on US Imaging and NMES is a featured article in IEEE TMBE.

Dr. Sharma receives 2019 IEEE CSS Control Systems Technology Award for his work on FES Control

Z. Sheng was Vodovnik Student paper Award Finalist at IFESS 2019

Q. Zhang was Best Student Paper Finalist at ICORR 2019

Recent Publications

Q. Zhang, K. Kim, and N. Sharma “Prediction of Ankle Dorsiflexion Moment by Combined Ultrasound Sonography and Electromyography,” IEEE Transactions on Neural Systems and Rehabilitation Engineering,” accepted.

Z. Sheng, N. Sharma, and K. Kim, “Quantitative Assessment of Changes in Muscle Contractility Due to Fatigue During NMES: An Ultrasound Imaging Approach,” IEEE Transactions on Biomedical Engineering,” accepted.