An Optimal PID Controller for Artificial Knee Exoskeleton Devices

One may experience knee problems due to several issues, such as arthritic conditions being overweight, strokes, post-polio conditions, ligament damage, or mishaps. To assist in mobility, artificial knee devices are frequently used. In this study, an optimal proportional integral derivative (PID) is proposed with the aim of achieving precise control over the angular movements of these devices. Furthermore, the proposed controller for knee exoskeleton systems is effectively tuned using a well-known metaheuristic algorithm named particle swarm optimizer (PSO). The simulation results demonstrate that PSO-PID controller significantly outperformed traditional algorithms in the area of control performance when employed with the knee exoskeleton systems.