The Performance of Helmet-based Kinematic Measurement Systems PDF Download
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Author: Mari A. Allison
Publisher:
ISBN:
Category :
Languages : en
Pages : 498
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Book Description
It is estimated that millions of mild traumatic brain injuries (mTBIs) occur each year, and studies show that these injuries can have more long-term neurological consequences than previously thought. High impact sports provide a unique real-world opportunity to study the biomechanical inputs that lead to mTBI and helmet-based instrumentation can be used to estimate the kinematics of head impacts in sports. In Chapter 1, we evaluate two helmet-based measurement systems that use different approaches to estimate kinematics by impacting a helmeted anthropometric test device (ATD) in a laboratory setting. The relationships between the helmet sensor system and reference ATD measures are evaluated. In Chapter 3, we explore the effect of real-world impact and usage variations on the relationships between helmet system and ATD-measured head impact kinematics. The factors varied include the interface between the head and the helmet, repeatability of sensor/helmet systems, helmet geometry/construction, effective mass of the torso, and impacting surface. In Chapter 4 we assess the effect of helmet-based sensor performance on brain injury metrics calculated using finite element analysis. This is done by using helmet system and ATD data from the laboratory impacts as inputs into a finite element head model and comparing outcomes. Chapter 5 discusses the implications of the findings on the implementation of helmet-based systems in real-world scenarios.
Author: Mari A. Allison
Publisher:
ISBN:
Category :
Languages : en
Pages : 498
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Book Description
It is estimated that millions of mild traumatic brain injuries (mTBIs) occur each year, and studies show that these injuries can have more long-term neurological consequences than previously thought. High impact sports provide a unique real-world opportunity to study the biomechanical inputs that lead to mTBI and helmet-based instrumentation can be used to estimate the kinematics of head impacts in sports. In Chapter 1, we evaluate two helmet-based measurement systems that use different approaches to estimate kinematics by impacting a helmeted anthropometric test device (ATD) in a laboratory setting. The relationships between the helmet sensor system and reference ATD measures are evaluated. In Chapter 3, we explore the effect of real-world impact and usage variations on the relationships between helmet system and ATD-measured head impact kinematics. The factors varied include the interface between the head and the helmet, repeatability of sensor/helmet systems, helmet geometry/construction, effective mass of the torso, and impacting surface. In Chapter 4 we assess the effect of helmet-based sensor performance on brain injury metrics calculated using finite element analysis. This is done by using helmet system and ATD data from the laboratory impacts as inputs into a finite element head model and comparing outcomes. Chapter 5 discusses the implications of the findings on the implementation of helmet-based systems in real-world scenarios.
Author: Carl Arthur Fischer
Publisher:
ISBN:
Category :
Languages : en
Pages : 264
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Book Description
Author: Roger Bostelman
Publisher:
ISBN:
Category : Measurement uncertainty (Statistics)
Languages : en
Pages : 0
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Book Description
Proper exoskeleton fit to user impacts the safety of the human robot interaction. Exoskeletons are now being marketed by several manufacturers and yet there are currently no defined methods to measure the exoskeleton fit to the user. This research aims to develop a quantifiable test and measurement framework for evaluating exoskeleton performance, beginning with the tracking of knee kinematics. Key challenges in knee kinematic measurements include the complexity of human biomechanics, the variability of human anthropometry as well as the uncertainty of marker position, relative to underlying skeletal features, as computed by an optical tracking system (OTS). A measurement methodology to assess exoskeleton-to-leg fit based on comparison of knee kinematics between the human and the exoskeleton is proposed. The methodology is based on the use of rigid artifacts to minimize marker motion, and therefore measurement error. Separate artifacts for the exoskeleton and the human limbs enable independent tracking of exoskeleton and knee joint kinematics in order to assess exoskeleton fit to user. A prosthetic test apparatus and a 3D printed human knee model apparatus were also designed and developed to simulate the biomechanics of the human knee. The experimental data from the prosthetic leg test apparatus showed agreement with both the simulated analytical model and the ground truth skeletal structure relative to the artifacts placed on the simulated leg. The reconfigurable artifact was also tested by the researchers to demonstrate how the novel design can be used to track knee kinematics between the human leg and the exoskeleton leg.
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 500
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Book Description
Author: Silvia Budday
Publisher: Frontiers Media SA
ISBN: 2889742792
Category : Science
Languages : en
Pages : 185
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Book Description
Author: National Research Council
Publisher: National Academies Press
ISBN: 0309288037
Category : Medical
Languages : en
Pages : 215
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Book Description
In the past decade, few subjects at the intersection of medicine and sports have generated as much public interest as sports-related concussions - especially among youth. Despite growing awareness of sports-related concussions and campaigns to educate athletes, coaches, physicians, and parents of young athletes about concussion recognition and management, confusion and controversy persist in many areas. Currently, diagnosis is based primarily on the symptoms reported by the individual rather than on objective diagnostic markers, and there is little empirical evidence for the optimal degree and duration of physical rest needed to promote recovery or the best timing and approach for returning to full physical activity. Sports-Related Concussions in Youth: Improving the Science, Changing the Culture reviews the science of sports-related concussions in youth from elementary school through young adulthood, as well as in military personnel and their dependents. This report recommends actions that can be taken by a range of audiences - including research funding agencies, legislatures, state and school superintendents and athletic directors, military organizations, and equipment manufacturers, as well as youth who participate in sports and their parents - to improve what is known about concussions and to reduce their occurrence. Sports-Related Concussions in Youth finds that while some studies provide useful information, much remains unknown about the extent of concussions in youth; how to diagnose, manage, and prevent concussions; and the short- and long-term consequences of concussions as well as repetitive head impacts that do not result in concussion symptoms. The culture of sports negatively influences athletes' self-reporting of concussion symptoms and their adherence to return-to-play guidance. Athletes, their teammates, and, in some cases, coaches and parents may not fully appreciate the health threats posed by concussions. Similarly, military recruits are immersed in a culture that includes devotion to duty and service before self, and the critical nature of concussions may often go unheeded. According to Sports-Related Concussions in Youth, if the youth sports community can adopt the belief that concussions are serious injuries and emphasize care for players with concussions until they are fully recovered, then the culture in which these athletes perform and compete will become much safer. Improving understanding of the extent, causes, effects, and prevention of sports-related concussions is vitally important for the health and well-being of youth athletes. The findings and recommendations in this report set a direction for research to reach this goal.
Author:
Publisher:
ISBN:
Category : Mechanics, Applied
Languages : en
Pages : 1166
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Book Description
Author: Society of Automotive Engineers
Publisher: SAE International
ISBN:
Category : Science
Languages : en
Pages : 158
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Book Description
Thirteen papers from the biomechanics technical sessions of the 2002 SAE congress use laboratory experiments, computer models, and field data to evaluate the human body's kinematics, kinetics, and injury potential in response to impact loads caused by automobile accidents. Topics include finite elem
Author: Daniel A. James
Publisher: Springer
ISBN: 9811009929
Category : Technology & Engineering
Languages : en
Pages : 54
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Book Description
This book explores emerging trends in wearable sensors for sport and highlights the developments taking place. Drawing on the literature both the approaches and principals for the use of sensors in sport are outlined, and together with references to key works the reader finds this useful in considering such endeavours. The development of wearable technologies is fast paced and accompanying that is an exponential growth in the use and development of computing resources, thus while the review is comprehensive on content not all works can be included and given publication times will inevitably be somewhat dated. The illumination through trends, examples and principles are an aid for anyone considering the use of sensors and wearables in sports.
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 654
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Book Description
