Challenges with sit to stand (STS) are one of the chief complaints amongst the nearly 309 million elderly people in the United States. STS is defined as the process of rising from a seated position to a stable standing position. This Major Qualifying Project designed a device to augment the forces required for STS. The objectives were to create a safe, reliable, and ergonomic device which reduces energy expenditure at a reasonable cost. The design utilized a moment about the knee providing 25% assistance based on an average moment of 1Nm/kg. Extension springs produced forces as the user sits. The design requires the user to wear one brace on each knee. Clinical tests addressed issues of comfort, impact on gait, and assistance with STS. This data were used to determine device effectiveness.
Worcester Polytechnic Institute
Major Qualifying Project
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