Analysis of a Real-World High-Speed Rollover Crash from a Video Record and Physical Evidence

We consider the problem of generating a time-optimal quadrotor trajectory for highly maneuverable vehicles, such as quadrotor aircraft. The problem is challenging because the optimal trajectory is located on the boundary of the set of dynamically feasible trajectories. This boundary is hard to model as it involves limitations of the entire system, including complex aerodynamic and electromechanical phenomena, in agile high-speed flight. In this work, we propose a multi-fidelity Bayesian optimization framework that models the feasibility constraints based on analytical approximation, numerical simulation, and real-world flight experiments. By combining evaluations at different fidelities, trajectory time is optimized while the number of costly flight experiments is kept to a minimum. The algorithm is thoroughly evaluated for the trajectory generation problem in two different scenarios: (1) connecting predetermined waypoints; (2) planning in obstacle-rich environments. For each scenario, we conduct both simulation and real-world flight experiments at speeds up to 11 m/s. Resulting trajectories were found to be significantly faster than those obtained through minimum-snap trajectory planning.

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Droplet microfluidics: from proof-of-concept to real-world utility?

Chemical Communications ◽

10.1039/c9cc04750f ◽

2019 ◽

Vol 55 (67) ◽

pp. 9895-9903 ◽

Cited By ~ 21

Author(s):

Akkapol Suea-Ngam ◽

Philip D. Howes ◽

Monpichar Srisa-Art ◽

Andrew J. deMello

Keyword(s):

Real World ◽

High Speed ◽

Droplet Microfluidics ◽

Proof Of Concept ◽

Conventional Instrumentation ◽

Practical Tool ◽

Tool Set

Droplet microfluidics constitutes a diverse and practical tool set that enables chemical and biological experiments to be performed at high speed and with enhanced efficiency when compared to conventional instrumentation.

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Development of Semi-Interface Motorcycle Simulator (SiMS)

International Journal of Engineering & Technology ◽

10.14419/ijet.v7i4.27.22504 ◽

2018 ◽

Vol 7 (4.27) ◽

pp. 148

Author(s):

Wan Muhammad Syahmi Wan Fauzi ◽

Abdul Rahman Omar ◽

Helmi Rashid

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Real World ◽

Computer Aided Design ◽

High Speed ◽

Controlled Environment ◽

Element Analysis ◽

Computer Aided ◽

Niche Area ◽

Aided Design

Recently, studies concerning motorcycle have been an overwhelming area of research interest. As an alternative to the real world assessment, researchers have utilized motorcycle simulator as a workstation to conduct studies in the motorcycle niche area. This paper deal with the development of a new motorcycle simulator named Semi-Interface Motorcycle Simulator (SiMS). Combination of Computer Aided Design (CAD) and Finite Element Analysis (FEA) software made it possible to design and simulates the motorcycle simulator’s conceptual design before being fabricated. The SiMS setup not only provides a near-to-real and immerse motorcycle riding experience on a super sport motorcycle model, but it also allows safer high speed motorcycle simulations to be conducted in a controlled environment that is portable and ergonomically easier to transport to various venues.

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Anthropometric dependence of the response of a Thorax FE model under high speed loading: Validation and real world accident replication

Computer Methods and Programs in Biomedicine ◽

10.1016/j.cmpb.2012.11.004 ◽

2013 ◽

Vol 110 (2) ◽

pp. 160-170 ◽

Cited By ~ 25

Author(s):

Sébastien Roth ◽

Fabien Torres ◽

Philippe Feuerstein ◽

Karine Thoral-Pierre

Keyword(s):

Real World ◽

High Speed ◽

Fe Model

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Performance Analysis of Ad hoc Networks on Real world Test-bed for High Speed Video Streaming

The Journal of the Institute of Webcasting, Internet and Telecommunication ◽

10.7236/jiibc.2013.13.3.141 ◽

2013 ◽

Vol 13 (3) ◽

pp. 141-150 ◽

Cited By ~ 1

Author(s):

Md Shohel Ahmed ◽

Seokhoon Yoon

Keyword(s):

Performance Analysis ◽

Ad Hoc Networks ◽

Video Streaming ◽

Real World ◽

High Speed ◽

Ad Hoc ◽

Test Bed ◽

High Speed Video ◽

Hoc Networks

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Development of a driver model to study the effects of real-world driver behaviour on the fuel consumption

Proceedings of the Institution of Mechanical Engineers Part D Journal of Automobile Engineering ◽

10.1177/0954407011409116 ◽

2011 ◽

Vol 225 (11) ◽

pp. 1518-1530 ◽

Cited By ~ 12

Author(s):

A McGordon ◽

J E W Poxon ◽

C Cheng ◽

R P Jones ◽

P A Jennings

Keyword(s):

Fuel Economy ◽

Real World ◽

High Speed ◽

Driver Model ◽

Good Representation ◽

Vehicle Speed ◽

Data Logging ◽

Real World Data ◽

Driver Behaviour ◽

The Individual

The real-world fuel economy of vehicles is becoming increasingly important to manufacturers and customers. One of the major influences in this is driver behaviour, but it is difficult to study in a controlled and repeatable manner. An assessment of driver models for studying real-world driver behaviour has been carried out. It has been found that none of the currently existing driver models has sufficient fidelity for studying the effects of real-world driver behaviour on the fuel economy of the individual vehicle. A decision-making process has been proposed which allows a driver model with a range of driving tasks to be developed. This paper reports the initial results of a driver model as applied to the conceptually straightforward scenario of high-speed cruising. Data for the driver model have been obtained through real-world data logging. It has been shown that the simulation driver model can provide a good representation of real-world driving behaviour in terms of the vehicle speed, and this is compared with a number of logged driver speed traces. A comparison of the modelled fuel economy for logged and driver model real-world drivers shows good agreement.

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Microsaccades in applied environments: Real-world applications of fixational eye movement measurements

Journal of Eye Movement Research ◽

10.16910/jemr.12.6.15 ◽

2020 ◽

Vol 12 (6) ◽

Author(s):

Robert G Alexander ◽

Stephen L Macknik ◽

Susana Martinez-Conde

Keyword(s):

Eye Movements ◽

Eye Movement ◽

Athletic Training ◽

Real World ◽

High Speed ◽

Sensory Deprivation ◽

Assessment Tools ◽

Current Evidence ◽

Fixational Eye Movements ◽

Real World Applications

Across a wide variety of research environments, the recording of microsaccades and other fixational eye movements has provided insight and solutions into practical problems. Here we review the literature on fixational eye movements—especially microsaccades—in applied and ecologically-valid scenarios. Recent technical advances allow noninvasive fixational eye movement recordings in real-world contexts, while observers perform a variety of tasks. Thus, fixational eye movement measures have been obtained in a host of real-world scenarios, such as in connection with driver fatigue, vestibular sensory deprivation in astronauts, and elite athletic training, among others. Here we present the state of the art in the practical applications of fixational eye movement research, examine its potential future uses, and discuss the benefits of including microsaccade measures in existing eye movement detection technologies. Current evidence supports the inclusion of fixational eye movement measures in real-world contexts, as part of the development of new or improved oculomotor assessment tools. The real-world applications of fixational eye movement measurements will only grow larger and wider as affordable high-speed and high-spatial resolution eye trackers become increasingly prevalent.

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An Improved Dummy Neck Assembly for Dynamic Rollover Testing

ASME 2010 Summer Bioengineering Conference, Parts A and B ◽

10.1115/sbc2010-19656 ◽

2010 ◽

Author(s):

Jacqueline G. Paver ◽

Justin Caplinger ◽

Garrett Mattos ◽

Donald Friedman

Keyword(s):

Real World ◽

Muscle Tension ◽

Human Head ◽

Matched Pair ◽

Neck Injuries ◽

Stiff Neck ◽

Ongoing Research ◽

Compliance Testing ◽

Hybrid Iii ◽

Rollover Crash

In the U.S., more than 27,000 catastrophic and fatal injuries occur annually in rollover crashes. Due to the incidence and severity of injuries in rollover crashes, a strategy for injury mitigation is dynamic compliance testing with dummy-occupied vehicles and occupant protection requirements, similar to that required for frontal and side impacts. Presently, there are dynamic vehicle rollover test devices like the Controlled Rollover Impact System and the Jordan Rollover System that realistically recreate real-world rollover crash scenarios. However, the Hybrid III dummy, which is considered to be the best available human surrogate for dynamic rollover tests, has a very stiff neck with limited biofidelity in rollover crashes; the Hybrid III neck is much stiffer than the human neck. Catastrophic human head or neck injuries resulting from roof interaction and partial ejection in real-world rollover crashes are poorly replicated by dynamic rollover tests with the non-biofidelic Hybrid III dummy neck. Only with a more biofidelic dummy can effective testing result in injury mitigation in rollover crashes. This study is part of an ongoing research project aimed at mitigating catastrophic human neck injuries in real-world rollover crashes. The goal was to develop a biofidelic neck assembly for the Hybrid III dummy in rollover crash environments. The design goals of this prototype neck included decreased stiffness and a mechanism that represents the unknowable human muscle tension in rollover crash environments. This paper and its companion paper in this conference introduce the new neck design, present results of matched-pair tests that compare the responses of the new neck with the production Hybrid III neck, and propose preliminary rollover injury criteria for this neck. The neck demonstrates repeatability, improved biofidelity, which results in more realistic occupant kinematics, dynamics, injury prediction, and evaluation of various countermeasures.

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