Design, Development and Characterization of a Wrap Spring Clutch/Brake Mechanism As a Knee Joint for an Assistive Exoskeleton

2021 ◽  
Author(s):  
Vishnu Aishwaryan Subra Mani ◽  
Nathaniel Goldfarb ◽  
Gregory Fischer
Keyword(s):  
Knee Joint ◽  
Design Development ◽  
Spring Clutch

Design, Development and Characterization of a Wrap Spring Clutch/Brake Mechanism As a Knee Joint for an Assistive Exoskeleton

2020 ◽  
Author(s):  
Vishnu Aishwaryan Subra Mani ◽  
Nathaniel Goldfarb ◽  
Gregory S. Fischer
Keyword(s):  
Knee Joint ◽  
Ground Level ◽  
Design Approach ◽  
Stress Tests ◽  
Design Development ◽  
Research Activities ◽  
Wide Range ◽  
And Performance ◽  
Spring Clutch ◽  
The Right

Abstract Over the past decade, wearable robotics and exoskeletons have been gaining recognition in the field of medical, assistive and augmentative robotics and have led to numerous new innovative mechanisms and designs. Due to fast-paced research activities, the critical importance and performance of established mechanisms such as wrap spring clutch/brake, Wafer Disc Brakes have been overlooked or used ineffectively. This paper describes a practical design approach that will enable the designer to choose a mechanism based on the application of the device, which will promote overall growth in current technology. The Legged Anthropomorphic Robotic Rehabilitation Exoskeleton (LARRE) project used this approach to design, manufacture, and test the knee joint for ground-level walking. This paper provides the reasoning behind the selection of wrap spring clutch, its evaluation, and testing standards as the knee joint. A thorough literature review was conducted to understand the current state of the art. This project collected a rich set of biomechanical data to ensure that the mechanism will produce the right moments and range of motions during walking. To ensure that our mechanism meets the requirements, the mechanism was put through a wide range of stress tests. The paper establishes a methodology to choose a mechanism for an exoskeleton’s joint based on the desired requirements. The outcome of this paper is an analytical based design approach that can be used by other researchers to impart additional traits and weights, which will aid in the development of exoskeleton design.

scholarly journals Desarrollo de una plataforma de evaluación de estudiantes de nuevo ingreso en educación superior

2019 ◽  
pp. 6-12
Author(s):  
Fernando José Martínez-López ◽  
Luis Germán Gutierrez-Torres
Keyword(s):  
Higher Education ◽  
Information Technologies ◽  
Private Higher Education ◽  
Host Institution ◽  
Design Development ◽  
Proper Training ◽  
New Students ◽  
Engineering Practices ◽  
Analysis Platform

This article shows the process of design, development, and implementation of a platform created to form an environment for identification and timely characterization of knowledge, skills, and profiles of new students, through the treatment of data and information technologies, during the process of institutional admission exams in higher education. For its construction, work has been done through a methodology based on best software engineering practices, developing various modules that integrated achieve the functionality required to function as information management and analysis platform. The antecedents found allowed to determine that before the approach of this platform, there was only generalized software, adaptable with some difficulties, destined to the application of exams, distant from the raised vision of a platform for data exploration. This work aims to provide the host institution and all public and / or private higher education institutions with a tool that allows them to have bases for timely decision making and the taking of relevant actions that contribute to the proper training of professionals from its initial stages, through an early identification of skills and profiles of its applicants.

scholarly journals Characterization of morphology in healthy, traumatized and aged knee meniscus of different species: A pilot study

2019 ◽  
Vol 28 (1) ◽  
pp. 96-110
Author(s):  
Marija Podļesnaja ◽  
Mara Pilmane ◽  
Modris Ciems
Keyword(s):  
Cell Death ◽  
Pilot Study ◽  
Knee Joint ◽  
Comparative Morphology ◽  
Anatomical Structure ◽  
Collagen I ◽  
Knee Meniscus ◽  
Moderate Number ◽  
Number Of Cells

Meniscus is a fibrocartilaginous anatomical structure that realizes complicated biomechanical functions in the knee joint. However, no comparative morphology studies have been done on different species and conditions regarding the meniscus. Thus, the aim of our pilot study was to compare the morphology of traumatized and aged human and healthy deer meniscus to reveal the tissue ground, growth, degeneration, cell death and inflammation factors. The study included surgery materials from one deer and two humans. Biotin-streptavidin immunohistochemistry was performed for detection of tissue TGFβ1, MMP2, MMP9, collagen I, caspase, Il-1, Il-6, Il-10. The results were evaluated semiquantitatively. An abundant number of Collagen I positive cells were detected in the disordered human meniscus but not in the deer one. TGFβ1 was seen in numerous to abundant number of cells in all the three cases. MMPs and caspase were distributed with numerous to abundant cells in both human and deer meniscus. Numerous to abundant cells of traumatized and aged human menisci showed IL-1 and IL-6, while the deer meniscus demonstrated cytokine expression in a moderate number of cells only in limited zones. The traumatized human meniscus possessed an abundant number of IL-10 positive cells, while the deer and the aged human meniscus showed mainly a moderate number of IL-10 cells with some elevation of cytokine in superficial and deepest layers of the meniscus.

scholarly journals Tissue and movement biomechanical characterization of osteoarthritis progression in mouse knee joint

2017 ◽  
Vol 20 (sup1) ◽  
pp. S153-S154
Author(s):  
L. Olive ◽  
S. Gad ◽  
M. Fining ◽  
L. Thomas ◽  
J. P. Berteau
Keyword(s):  
Knee Joint ◽  
Osteoarthritis Progression

Effect of BMI on Knee Joint Torques in Ergometer Rowing

2013 ◽  
Vol 29 (6) ◽  
pp. 763-768 ◽  
Author(s):  
Karen Roemer ◽  
Tibor Hortobagyi ◽  
Chris Richter ◽  
Yolanda Munoz-Maldonado ◽  
Stephanie Hamilton
Keyword(s):  
Knee Joint ◽  
Weight Bearing ◽  
Normal Weight ◽  
Obese Adults ◽  
Joint Kinetics ◽  
Joint Torques ◽  
Ergometer Rowing ◽  
Lower Extremity Biomechanics ◽  
High Bmi

Although an authoritative panel recommended the use of ergometer rowing as a non-weight-bearing form of exercise for obese adults, the biomechanical characterization of ergometer rowing is strikingly absent. We examined the interaction between body mass index (BMI) relative to the lower extremity biomechanics during rowing in 10 normal weight (BMI 18–25), 10 overweight (BMI 25–30 kg·m−2), and 10 obese (BMI > 30 kg·m−2) participants. The results showed that BMI affects joint kinematics and primarily knee joint kinetics. The data revealed that high BMI leads to unfavorable knee joint torques, implying increased loads of the medial compartment in the knee joint that could be avoided by allowing more variable foot positioning on future designs of rowing ergometers.

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