Results 21 to 30 of about 29,522 (319)
Optimization of a New High Rotary Missile-Borne Stabilization Platform
Sensors, 2019 The passive semi-strapdown roll stabilized platform is an inertial platform, which can isolate the rolling of a projectile body by a special mechanical device.
Xiaokai Wei +6 more
doaj +1 more source
Bat target tracking strategies for prey interception
Communicative & Integrative Biology, 2021 Insectivorous bats capture their prey in flight with impressive success. They rely on the echoes of their own ultrasonic vocalization that yield acoustic snapshots, which enable target tracking on a rapid time scale.
Angeles Salles +2 more
doaj +1 more source
Characterizing an Air-Bearing Testbed for Simulating Spacecraft Dynamics and Control
Aerospace, 2022 Ground-based testbeds play a critical role in developing and testing different methods of spacecraft dynamics and control. To find the dynamic behavior in such an air-bearing testbed, a detailed characterization of the testbed must be provided via ...
Zheng Huang +4 more
doaj +1 more source
A novel Technique for Improving the Angular Accuracy of Doppler VOR Receivers [PDF]
Advances in Radio Science, 2021 Doppler VOR (D-VOR) transmitters are used as navigation aids in aviation. They transmit an omnidirectional phase reference in an amplitude-modulated (AM) sideband and directional phase information on a frequency-modulated (FM) subcarrier.
K. Schubert, J. Werner, J. Wellhausen
doaj +1 more source
Precision of navigated and conventional open-wedge high tibial osteotomy in a cadaver study
European Journal of Medical Research, 2010 High tibial osteotomy (HTO) is an established treatment option for isolated medial osteoarthritis in young and active patients. One important factor for success of this procedure is the degree of correction of the weight-bearing line.
Lützner J +3 more
doaj +1 more source
Modern Solar Navigation Techniques
Groundings, 2023 Navigation by sea has proven difficult due to the absence of distinct markers for guidance. One solution for longer journeys was to track the position of celestial bodies as a navigational method, which has become more reliable as mathematical models ...
Alberto Bodas Gallego
doaj +1 more source
Observability-enhanced proportional navigation guidance with bearings-only measurements [PDF]
The Journal of the Australian Mathematical Society. Series B. Applied Mathematics, 1999 AbstractWe analyse the performance of the additive observable proportional navigation guidance system, which is well-suited for low-cost homing missiles with bearings-only measurements. Closed-form solutions are derived for both manoeuvring and non-manoeuvring targets.
Li, M. Y., Lim, C. C.
openaire +2 more sources
Navigation Method for Autonomous Robots in a Dynamic Indoor Environment
International Journal of Automation and Smart Technology, 2013 The present paper considers issues related to navigation by autonomous mobile robots in overcrowded dynamic indoor environments (e.g., shopping malls, exhibition halls or convention centers). For robots moving among potentially unaware bystanders, safety
Stanislav Věchet +2 more
doaj +1 more source
An assay to investigate factors influencing initial orientation in nocturnally fledging seabirds
Journal of Avian Biology, 2021 The first solitary migration of juvenile birds is difficult to study because of a low juvenile survival rates and sometimes long delays in return to the breeding grounds.
Martyna Syposz +5 more
doaj +1 more source
Bearing-Only Navigation with Field of View Constraints [PDF]
, 2020 This paper addresses the problem of navigation using only relative direction measurements (i.e., relative distances are unknown) under field of view constraints. We present a novel navigation vector field for the bearing-based visual homing problem with respect to static visual landmarks in 2-D and 3-D environments.
arxiv +1 more source