Development and Trial of an Item Set for Testing Traffic Perception and Hazard Avoidance

2016 ◽  
pp. 1003-1013
Author(s):  
Annika Dreßler ◽  
Bianca Bredow ◽  
Lars Rößger ◽  
Mathias Rüdel ◽  
Dietmar Sturzbecher
Keyword(s):  
Hazard Avoidance

High-speed hazard avoidance for mobile robots in rough terrain

2004 ◽  
Author(s):  
Matthew J. Spenko ◽  
Karl D. Iagnemma ◽  
Steven Dubowsky
Keyword(s):  
Mobile Robots ◽  
High Speed ◽  
Rough Terrain ◽  
Hazard Avoidance

scholarly journals Bioinspired Engineering of Exploration Systems for NASA and DoD

2002 ◽  
Vol 8 (4) ◽  
pp. 357-369 ◽  
Author(s):  
Sarita Thakoor ◽  
Javaan Chahl ◽  
M. V. Srinivasan ◽  
L. Young ◽  
Frank Werblin ◽  
...  
Keyword(s):  
Flight Control ◽  
Image Understanding ◽  
Three Dimensions ◽  
Search Pattern ◽  
Multiple Features ◽  
Nonlinear Network ◽  
Hazard Avoidance ◽  
Biological Studies ◽  
Terrain Following ◽  
Parallel Features

A new approach called bioinspired engineering of exploration systems (BEES) and its value for solving pressing NASA and DoD needs are described. Insects (for example honeybees and dragonflies) cope remarkably well with their world, despite possessing a brain containing less than 0.01% as many neurons as the human brain. Although most insects have immobile eyes with fixed focus optics and lack stereo vision, they use a number of ingenious, computationally simple strategies for perceiving their world in three dimensions and navigating successfully within it. We are distilling selected insect-inspired strategies to obtain novel solutions for navigation, hazard avoidance, altitude hold, stable flight, terrain following, and gentle deployment of payload. Such functionality provides potential solutions for future autonomous robotic space and planetary explorers. A BEES approach to developing lightweight low-power autonomous flight systems should be useful for flight control of such biomorphic flyers for both NASA and DoD needs. Recent biological studies of mammalian retinas confirm that representations of multiple features of the visual world are systematically parsed and processed in parallel. Features are mapped to a stack of cellular strata within the retina. Each of these representations can be efficiently modeled in semiconductor cellular nonlinear network (CNN) chips. We describe recent breakthroughs in exploring the feasibility of the unique blending of insect strategies of navigation with mammalian visual search, pattern recognition, and image understanding into hybrid biomorphic flyers for future planetary and terrestrial applications. We describe a few future mission scenarios for Mars exploration, uniquely enabled by these newly developed biomorphic flyers.

GN&C, and Precision Landing and Hazard Avoidance Technology Demonstration

2007 ◽  
Author(s):  
Robert Frampton ◽  
James Ball ◽  
Karl Oittinen ◽  
Sunil Tandon ◽  
Daniel Schwab ◽  
...  
Keyword(s):  
Hazard Avoidance ◽  
Technology Demonstration ◽  
Precision Landing

Design and Performance Assessment of Hazard Avoidance Techniques For Vision Based Landing

2006 ◽  
Author(s):  
Paola Rogata ◽  
Emanuele Di Sotto ◽  
Francisco Câmara ◽  
Augusto Caramagno ◽  
J.M. Rebordão ◽  
...  
Keyword(s):  
Performance Assessment ◽  
Hazard Avoidance ◽  
And Performance

Management of Ground Movement Hazards: An Overview of a JIP

2020 ◽  
Author(s):  
Yong-Yi Wang ◽  
Don West ◽  
Doug Dewar ◽  
Alex Mckenzie-Johnson ◽  
Steve Rapp
Keyword(s):  
Best Practice ◽  
Major Elements ◽  
Ground Movement ◽  
Management Approach ◽  
Hazard Management ◽  
Ground Movements ◽  
Strain Design ◽  
Hazard Avoidance ◽  
Actual Field ◽  
Girth Welds

Abstract Ground movements such as landslides, subsidence, and settlement can pose serious threats to the integrity of pipelines. The consequences of a ground movement event can vary greatly. Certain types of ground movements are slow-moving and can be monitored and mitigated before a catastrophic failure. Other forms of ground movements can be difficult to predict. The most effective approach could be hazard avoidance, proactive means to reduce strain demand on pipelines, and/or building sufficiently robust pipeline segments that have a high tolerance to the strain demand. This paper provides an overview of a Joint Industry Project (JIP) aimed at developing a best-practice document on managing ground movement hazards. The hazards being focused on are landslides and ground settlement, including mine subsidence. This document attempts to address nearly all major elements necessary for the management of such hazards. The most unique feature of the JIP is that the scope included the hazard management approach often practiced by geotechnical engineers and the fitness-for-service assessment of pipelines often performed by pipeline integrity engineers. The document developed in the JIP provides a technical background of various existing and emerging technologies. The recommendations were developed based on a solid fundamental understanding of these technologies and a wide array of actual field experiences. In addition to the various elements involved in the management of ground movement hazards, the JIP addresses some common misconceptions about the adequacy of codes and standards, including: • The adequacy of design requirements in ASME B31.4 and B31.8 with respect to ground movement hazards, • The adequacy of linepipe standards such as API 5L and welding standards such as API 1104 for producing strain-resistant pipelines, • The proper interpretation of the longitudinal strain design limit of 2% strain in ASME B31.4 and B31.8, and • The effectiveness of hydrostatic testing in “weeding out” low strain tolerance girth welds.

Sign in / Sign up

Export Citation Format

Share Document