Results 1 to 10 of about 29,522 (319)

Hybrid Guidance Optimization for Multipulse Glideslope Approach with Bearing-Only Navigation [PDF]

Aerospace, 2022
This paper proposes a modified glideslope guidance method that optimizes a hybrid multiobjective of bearing-only navigation error and fuel consumption. The traditional glideslope guidance fixes uniform maneuver intervals and the initial approach velocity
Hao Yuan, Dongxu Li, Jie Wang
doaj   +3 more sources

Sample-Based Output-Feedback Navigation with Bearing Measurements [PDF]

arXiv, 2022
We consider the problem of sample-based feedback-based motion planning from bearing (direction-only) measurements. We build on our previous work that defines a cell decomposition of the environment using RRT*, and finds an output feedback controller to navigate through each cell toward a goal location using duality, Control Lyapunov and Barrier ...
Mahroo Bahreinian, Marc Mitjans, Roy Xing, Roberto Tron   +3 more
arxiv   +5 more sources

Mobile bearing shows larger rollback motion than fixed bearing in total knee arthroplasty using a medial stabilising technique with a navigation system

Journal of Experimental Orthopaedics
Purpose This study aimed to investigate the intraoperative knee kinematics of cruciate‐retaining total knee arthroplasty with a medial stabilising technique (MST‐TKA) and compare the kinematics between mobile‐ and fixed‐bearing MST‐TKAs.
Takahiro Tsushima, Eiji Sasaki, Shizuka Sasaki, Kazuki Oishi, Yukiko Sakamoto, Yuka Kimura, Hironori Otsuka, Yuji Yamamoto, Eiichi Tsuda, Yasuyuki Ishibashi   +9 more
doaj   +4 more sources

Bearing-Only Navigation with Field of View Constraints [PDF]

IEEE Control Systems Letters, 2021
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.
Arman Karimian, Roberto Tron
  +8 more sources

Autonomous Underwater Vehicle Navigation via Sensors Maximum-Ratio Combining in Absence of Bearing Angle Data [PDF]

Journal of Marine Science and Engineering, 2023
This paper proposes a maximum-ratio combining sensor fusion scheme for using an extended Kalman filter in the underwater vehicle positioning task by means of communication devices (buoys) providing location information using a slant-range mechanism ...
Vadim Kramar, Aleksey Kabanov, Kirill Dementiev   +2 more
doaj   +2 more sources

Optimal Trajectories for Homing Navigation with Bearing Measurements

IFAC Proceedings Volumes, 2008
In this paper we examine the geometry of a number of navigation schemes for guiding a pursuer from a fixed initial position to a final target position. We explicitly characterize the optimal pursuer trajectories for the given problems in terms of minimizing the error in an unbiased estimate of the target position from successive bearing measurements ...
Adrian N. Bishop, Pubudu N. Pathirana
openalex   +3 more sources

Cooperative Navigation Based on Bearing and Range Measurements to Different Vehicles

IFAC-PapersOnLine, 2020
Abstract This paper presents a navigation solution for a vehicle operating in cooperation with two other. The vehicle is assumed to measure bearing to one of the aiding vehicles and range to the other. An observer with globally exponentially stable error dynamics is designed by obtaining an equivalent observable linear time-varying system using an ...
David Santos, Pedro Batista
openalex   +3 more sources

Allocentric and egocentric spatial representations coexist in rodent medial entorhinal cortex [PDF]

Nature Communications
Successful navigation relies on reciprocal transformations between spatial representations in world-centered (allocentric) and self-centered (egocentric) frames of reference.
Xiaoyang Long, Daniel Bush, Bin Deng, Neil Burgess, Sheng-Jia Zhang   +4 more
doaj   +2 more sources

Comparison of Mobile-Bearing and Fixed-Bearing Designs in High Flexion Total Knee Arthroplasty: Using a Navigation System

Knee Surgery & Related Research, 2012
We compared and analyzed the short term results of high flexion total knee arthroplasty (TKA) with mobile-bearing and fixed bearing designs.We studied 32 patients that had undergone TKA with LPS-Flex Mobile and 34 patients with LPS-Flex Fixed using an electromagnetic navigation system between January 2010 and June 2010, and were followed up for at ...
Tae Wan Kim, Shi Hwan Park, Jeung Tak Suh   +2 more
openalex   +5 more sources

Underwater vehicle navigation using bearing measurements from a mobile beacon

IFAC-PapersOnLine
Autonomous underwater vehicles enable efficient underwater operations such as mapping, surveillance, and inspection. However, due to the lack of global navigation satellite systems (GNSS) signals, drift in pose estimates will occur over time. Common solutions to this issue are using either stationary or mobile beacons to provide range and possibly ...
S. Hoff, Henrik M. Schmidt-Didlaukies, Erlend A. Basso, Damiano Varagnolo, Kristin Y. Pettersen   +4 more
openalex   +4 more sources