Evaluation of Cooperative UAV-UGV Navigation Strategies with Maneuvering UAVs

2021 ◽  
Author(s):  
Jacob Pryor ◽  
Scott Martin ◽  
David Bevly
Keyword(s):  
Navigation Strategies

scholarly journals Hydrodynamics can determine the optimal route for microswimmer navigation

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Abdallah Daddi-Moussa-Ider ◽  
Hartmut Löwen ◽  
Benno Liebchen
Keyword(s):  
Flow Field ◽  
Hydrodynamic Interactions ◽  
Optimal Trajectories ◽  
Optimal Route ◽  
Active Particles ◽  
Navigation Strategy ◽  
Navigation Strategies

AbstractAs compared to the well explored problem of how to steer a macroscopic agent, like an airplane or a moon lander, to optimally reach a target, optimal navigation strategies for microswimmers experiencing hydrodynamic interactions with walls and obstacles are far-less understood. Here, we systematically explore this problem and show that the characteristic microswimmer-flow-field crucially influences the navigation strategy required to reach a target in the fastest way. The resulting optimal trajectories can have remarkable and non-intuitive shapes, which qualitatively differ from those of dry active particles or motile macroagents. Our results provide insights into the role of hydrodynamics and fluctuations on optimal navigation at the microscale, and suggest that microorganisms might have survival advantages when strategically controlling their distance to remote walls.

Use and interaction of navigation strategies in regionalized environments

2004 ◽  
Vol 24 (4) ◽  
pp. 475-493 ◽  
Author(s):  
Jan M. Wiener ◽  
Alexander Schnee ◽  
Hanspeter A. Mallot
Keyword(s):  
Navigation Strategies

Robot navigation: implications from search strategies in exploring crayfish

Robotica ◽  
2009 ◽  
Vol 28 (3) ◽  
pp. 465-475 ◽  
Author(s):  
Edith Heußlein ◽  
Blair W. Patullo ◽  
David L. Macmillan
Keyword(s):  
Mobile Robots ◽  
Computer Model ◽  
Sensory Input ◽  
Robot Navigation ◽  
Search Strategies ◽  
Search And Rescue ◽  
Autonomous Mobile Robots ◽  
Biological Knowledge ◽  
Baseline Algorithm ◽  
Navigation Strategies

SUMMARYBiomimetic applications play an important role in informing the field of robotics. One aspect is navigation – a skill automobile robots require to perform useful tasks. A sub-area of this is search strategies, e.g. for search and rescue, demining, exploring surfaces of other planets or as a default strategy when other navigation mechanisms fail. Despite that, only a few approaches have been made to transfer biological knowledge of search mechanisms on surfaces along the ground into biomimetic applications. To provide insight for robot navigation strategies, this study describes the paths a crayfish used to explore terrain. We tracked movement when different sets of sensory input were available. We then tested this algorithm with a computer model crayfish and concluded that the movement of C. destructor has a specialised walking strategy that could provide a suitable baseline algorithm for autonomous mobile robots during navigation.

Women of Color in Computing Graduate Education: Structural Supports and Navigation Strategies for a Hostile Culture

2021 ◽  
Author(s):  
Nuria Jaumot-Pascual ◽  
Christina B. Silva ◽  
Audrey Martinez-Gudaoakkam ◽  
Maria Ong
Keyword(s):  
Graduate Education ◽  
Women Of Color ◽  
Navigation Strategies

A method for robot navigation toward a moving goal with unknown maneuvers

Robotica ◽  
2005 ◽  
Vol 23 (6) ◽  
pp. 709-720 ◽  
Author(s):  
F. Belkhouche ◽  
B. Belkhouche
Keyword(s):  
Obstacle Avoidance ◽  
Robot Navigation ◽  
A Priori ◽  
Line Of Sight ◽  
Polar Diagram ◽  
Guidance Law ◽  
Global Aspect ◽  
Combining Information ◽  
Mode A ◽  
Navigation Strategies

This paper deals with a method for robot navigation towards a moving goal. The goal maneuvers are not a priori known to the robot. Our method is based on the use of the kinematics equations of the robot and the goal combined with geometrical rules. First a kinematics model for the tracking problem is derived and two strategies are suggested for robot navigation, namely the velocity pursuit guidance law and the deviated pursuit guidance law. It turns out that in both cases, the robot's angular velocity is equal to the line of sight angle rate. Important properties of the navigation strategies are discussed and proven. In the presence of obstacles, two navigation modes are used: the tracking mode, which has a global aspect and the obstacle avoidance mode, which has a local aspect. In the obstacle avoidance mode, a polar diagram combining information about obstacles and directions corresponding to the pursuit is constructed. An extensive simulation study is carried out, where the efficiency of both strategies is illustrated for different scenarios.

scholarly journals 2018: A Streaming Video Odyssey

2020 ◽  
Vol 4 (1) ◽  
Author(s):  
Anali Perry ◽  
Karen Grondin
Keyword(s):  
Best Practices ◽  
Lessons Learned ◽  
Streaming Video ◽  
Library Services ◽  
Implementation Plan ◽  
Future Directions ◽  
Environmental Scan ◽  
Training Materials ◽  
Navigation Strategies

In this case study, we reflect on our journey through a major revision of our streaming video reserve guidelines, informed by an environmental scan of comparable library services and current copyright best practices. Once the guidelines were revised, we developed an implementation plan for communicating changes and developing training materials to both instructors and internal library staff. We share our navigation strategies, obstacles faced, lessons learned, and ongoing challenges. Finally, we map out some of our future directions for improving and streamlining our services.  

scholarly journals Age-related changes in spatial navigation are evident by midlife and differ by sex

2020 ◽  
Author(s):  
Shuying Yu ◽  
Alexander Paul Boone ◽  
Carol He ◽  
Rie Davis ◽  
Mary Hegarty ◽  
...  
Keyword(s):  
Path Integration ◽  
Middle Age ◽  
Spatial Navigation ◽  
Spatial Knowledge ◽  
Early Age ◽  
Age Related ◽  
Navigation Path ◽  
Spatial Knowledge Acquisition ◽  
Age Related Changes ◽  
Navigation Strategies

Accumulating evidence suggests that distinct aspects of successful navigation—path integration, acquiring spatial knowledge, and navigation strategies—change with advanced age. Yet, few studies have established whether navigation deficits emerge early in the aging process (prior to age 65) or whether early age-related deficits vary by sex. Here, we probed healthy young (ages 18-28) and midlife (ages 43-61) adults on three essential aspects of navigation. First, path integration ability shows negligible effects of sex or age. Second, robust sex differences in spatial knowledge acquisition are observed in young adulthood and persist, but are diminished, with age. Third, by midlife, men and women show decreased ability to acquire spatial knowledge and increased reliance on taking habitual paths. Together, our findings indicate that age-related changes in navigation ability and strategy are evident as early as midlife and that path integration ability is relatively spared in the transition from youth to middle age.

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