Evaluating the Effect of an Amputee’s Physical Parameters of Pressure on a Lower-Limb Prosthetic Socket Using a Fuzzy-Logic-Based Model

There are more than 30 million people worldwide having amputations and most of them involve the lower limb at the transtibial level. With the help of prosthesis, amputees can improve the quality of life. The prosthetic socket act as a critical interface between amputation and residual limb, which is designed and developed in an iterative process by the prosthetist. Soft computing techniques have ability to describe non-trivial complex problems where input and output relations are non-linear. Soft computing techniques such as Fuzzy logic, ANN, evolutionary, and nature-inspired algorithms provide an adequate solution to the variety of complex problems, while acknowledging uncertainty involved in the problem. The sensor is of small thickness, flexible printed circuit, lightweight custom shape, and size. It can measure force between any two contacting surfaces and is durable enough to stand up in most environments with a force range. The defuzzification process was performed to obtain fuzzy output and transform fuzzy set data into numerical data value.