Investigating the Effect of Mass Variation for Sliding Mode Control of Functional Electrical Stimulation Aided Sit-to-Stand in Paraplegia

Presented is an evaluation of the sliding mode controller (SMC) for regulation of Functional Electrical Stimulation (FES) induced sit-to-stand (STS) movement considering a global human mass variation. It is aimed at the elimination of the retuning issue associated with control systems for different subjects. Results show that despite the changes in mass the control system maintained the tracking error close to zero; that is close to the desired, and without any disturbance scenario, it was also achieved within the suitable specifications. Thus, it shows that the SMC system can be employed to solve the issue of universality; therefore relieving the necessity of altering the control parameters always.