Abstract
In the community health system, non-pharmacological treatments are at the forefront of countries’ treatment. One of these treatments is rehabilitation. Rehabilitation is considered a very broad scientific field in the set of health and medical services and helps people recover after suffering from problems such as stroke, spinal cord injuries, orthopedic surgery, concussions, burns, hearing loss, central auditory processing disorder, balance problems, overcome their problem as much as possible and regain their previous functional independence. This process is expensive and requires a lot of time and patience. There are many exercise machines for rehabilitation purposes. These types of machines are not flexible during operation, and this lack of flexibility destroys their ability to face unwanted conditions during physiotherapy. Therefore, the necessity of using mechatronic technologies in the field of rehabilitation is clearly evident. In this chapter, we will first give an overview of a number of research projects carried out in the field of rehabilitation robots (mainly lower body) and, since our main focus is more on the optimal control of the intelligent system (mechatronics), in the continuation of the strategies we describe different controls applied to rehabilitation robots and examine their strengths and weaknesses.