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 lab has moved to the joint BME dept. at NCSU/UNC. Site will be updated soon

Recent Publications

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.