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A new bearing-only navigation law
2017 17th International Conference on Control, Automation and Systems (ICCAS), 2017This paper proposes a new bearing-only control law which can be used for autonomous navigation task. We firstly compare the proposed control law with a commonly used control law in the literature when the agent navigates with only one beacon. Second, we prove that if there are two or more beacons, the agent can almost globally asymptotically reaches ...
Minh Hoang Trinh +4 more
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Biologically inspired bearing-only navigation and tracking
2007 46th IEEE Conference on Decision and Control, 2007In this paper we develop controllers that are used for the control of individual or groups of vehicles based only on sensors that provide bearing information. Our inspiration is derived from the observation that many ant species use landmark retinal positions to navigate without having any range information.
Kumar, Vijay R., Loizou, Savvas
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Joint Line Changes After Navigation-Assisted Mobile-Bearing TKA
Orthopedics, 2009The purpose of this study was to analyze the clinical results of patients who underwent navigation-assisted cruciate ligament retention-type mobile-bearing total knee arthroplasty (TKA) according to joint line changes. From September 2004 to January 2006, cruciate ligament retention-type mobile-bearing TKAs were performed using a navigation system ...
Jae-Hyuk, Yang +3 more
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Navigated lower limb axis measurements: Influence of mechanical weight‐bearing simulation
Journal of Orthopaedic Research, 2007AbstractSuccessful outcomes following high tibial osteotomy (HTO) require precise realignment of the mechanical axis of the lower extremity. The inability to accurately assess the weight‐bearing axis intraoperatively may account for inappropriate degrees of correction with the osteotomy.
Daniel, Kendoff +7 more
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Trajectory characterizations for a discrete-time bearing-only navigation strategy
2008 16th Mediterranean Conference on Control and Automation, 2008In this paper we explore the geometry of a particular navigation scheme which guides a pursuer from a fixed initial position to a given fixed final position using a one-step look ahead strategy and using only bearing measurements. We explicitly characterize the optimal trajectories for the problem in terms of the Cramer-Rao bound such that the derived ...
Adrian N. Bishop, Pubudu N. Pathirana
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Nonlinear pseudo-measurement filtering for in-orbit bearings-only navigation
IEEE Transactions on Aerospace and Electronic Systems, 2015In-orbit rendezvous is a key enabling technology for many space missions that already enjoys significant heritage. However, complex hardware is generally required in order to measure the relative range. Achieving rendezvous employing only bearing/angle measurements would simplify the relative navigation hardware currently required, increasing ...
Jonathan Grzymisch, Walter Fichter
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One-step rendezvous guidance for improving observability in bearings-only navigation
Advances in Space Research, 2020Abstract In spacecraft rendezvous, bearings-only navigation generally suffers from a lack of observability in range direction. Therefore, dedicated orbital maneuvers are essential to improve the observability and meet the navigation requirement. This paper proposes a simple one-step guidance method for improving observability.
Sung-Hoon Mok +2 more
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Track initiation of bearings-only tracking based on ant navigation concept
Communications in Nonlinear Science and Numerical Simulation, 2010Abstract A novel heuristic track initiation method is developed for the bearing-only multi-sensor–multi-target tracking system, in which each target is assumed to move with a straight line. The key idea of the proposed method is derived from the ant navigation concept in its foraging life, which differs from the traditional ant colony optimization ...
Jihong Zhu, Benlian Xu, Zhiquan Wang
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Computer Navigation: Improving Outcomes with Hard on Hard Bearings
2007The design and manufacture of ceramic implants has improved significantly over the last decade. Consequently the use of ceramic-on-ceramic bearings in total hip replacement has become increasingly popular with over 150,000 components having been implanted in Europe [1].
Robert G. Middleton +2 more
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Observability Criteria and Unobservable Maneuvers for In-Orbit Bearings-Only Navigation
Journal of Guidance, Control, and Dynamics, 2014This paper provides an analytical derivation of the observability conditions for in-orbit bearings-only navigation that can also be used to solve for the conditions under which unobservable maneuvers occur. The derivation is performed in a rigorous yet relatively simple manner by attempting to solve for the initial conditions in a discrete formulation ...
Jonathan Grzymisch, Walter Fichter
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