The Response Speed Performance of Lower Limb Rehabilitation Robots based on Different PID Algorithms

Abstract

Nowadays, the aging of the population is common in the world, and the increase in age makes the incidence of stroke rise sharply. The Stroke can directly affect human movement ability, once suffering from it, it will seriously affect people's quality of life. As an important new type of medical equipment, the traditional PID control algorithm of the lower limb rehabilitation robot has limitations in response field, such as response speed and overshoot. However, there are gaps in the research on the response speed of different new PID algorithms. The purpose of this paper is to introduce the traditional PID algorithm and some new PID algorithms through literature retrieval, and evaluate the performance of the algorithm by comparing the response curves of different algorithms. It is found that the fuzzy PID algorithm and the improved GWO-PID algorithm perform better than the traditional algorithm in terms of response speed. This paper compares the response performance of different PID algorithms, which can not only help researchers understand the principle of the corresponding algorithm, but also help researchers compare the response performance between different algorithms.