Results 1 to 10 of about 9,856 (180)

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

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
openaire   +4 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

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

, 2022
This work is submitted to the IROS 2022 ...
Bahreinian, Mahroo, Mitjans, Marc, Xing, Roy, Tron, Roberto   +3 more
openaire   +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
openaire   +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 ...
Kim, Tae Wan, Park, Shi Hwan, Suh, Jeung Tak   +2 more
openaire   +4 more sources

Simple yet stable bearing‐only navigation [PDF]

Journal of Field Robotics, 2010
AbstractThis article describes a simple monocular navigation system for a mobile robot based on the map‐and‐replay technique. The presented method is robust and easy to implement and does not require sensor calibration or structured environment, and its computational complexity is independent of the environment size.
Tomas Krajnik, Jan Faigl, Vojtech Vonasek, Karel Kosnar, Miroslav Kulich, Libor Preucil   +5 more
openaire   +2 more sources

3D-printed navigation-guided FNS-CCS fixation reduces complications in young adults with comminuted femoral neck fractures: a retrospective cohort study [PDF]

BMC Musculoskeletal Disorders
Background Young adults with comminuted femoral neck fractures face elevated risks of postoperative shortening and osteonecrosis of the femoral head (ONFH) This study evaluates a novel surgical protocol integrating the Femoral Neck System (FNS) and 3D ...
Ting Fu, Kailong Geng, Li Li, Donglin Fu, Zongsheng Yin   +4 more
doaj   +2 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   +2 more sources

Aiding Navigation for Groups of Aircraft with Bearing and Distance Measurements

, 2018
This thesis extends previous work on navigational aidingof groups of aircraft, primarily intended for the fighter SAAB JAS 39 Gripen,as long as an aircraft gets GPS signals, it is easy to estimate position, but theGPS is relatively easy to jam, rendering alternative methods of positioning necessary.To use internal sensors measuring accelerations and ...
Mattias Olsson
openaire   +2 more sources