Improving the seat design of an assistive device for individuals with disabilities

The increasing demand for advanced mobility devices underscores the urgent need for solutions that effectively support individuals with limb impairments in their daily activities. In response to this, the IM3 electric wheelchair was developed as an innovative product designed to enable users to move independently while allowing smooth and flexible transitions between sitting and standing positions. Unlike conventional wheelchairs, the IM3 focuses on improving both functional versatility and ergonomic comfort to better meet the diverse needs of users. This study aims to further enhance the IM3’s performance by introducing design improvements that not only increase user comfort and operational safety but also reduce production costs and expand the chair’s usability in both indoor and outdoor environments. Central to the development process is the analysis of the seat frame structure, a crucial component for ensuring stability and safety during use. The research employs a combination of detailed 3D modeling, numerical simulations, and software-based evaluations to assess the mechanical performance of the structure under realistic loading conditions. Stress distribution, deformation, and displacement along the Z-axis were analyzed using computational simulations to identify potential weaknesses and optimize structural integrity. Different frame geometries—circular, oval, and square—were compared to determine the most efficient design for supporting user weight while minimizing material use. Autodesk Fusion 360 and RecurDyn software were utilized to accurately simulate load-bearing behavior and motion dynamics. The results offer valuable insights into improving both the mechanical and ergonomic aspects of the IM3 wheelchair. Ultimately, this research contributes to the creation of safer, more efficient, and user-friendly mobility technology, marking an important step toward the development of patient-centered assistive devices that enhance independence and quality of life.