Results 11 to 20 of about 54,590 (219)

A Shape-Based Method for Continuous Low-Thrust Trajectory Design between Circular Coplanar Orbits

open access: yesInternational Journal of Aerospace Engineering, 2017
The shape-based method can provide suitable initial guesses for trajectory optimization, which are useful for quickly converging a more accurate trajectory.
Qun Fang   +3 more
doaj   +1 more source

A TSR Visual Servoing System Based on a Novel Dynamic Template Matching Method

open access: yesSensors, 2015
The so-called Tethered Space Robot (TSR) is a novel active space debris removal system. To solve its problem of non-cooperative target recognition during short-distance rendezvous events, this paper presents a framework for a real-time visual servoing ...
Jia Cai   +3 more
doaj   +1 more source

Analysis and Demonstration of First Cross-Support Interferometry Tracking in China Mars Mission

open access: yesRemote Sensing, 2022
Delta-Differential One-Way Ranging (DeltaDOR) is widely used in deep spacecraft navigation, and cross support could enhance navigation accuracy with more interferometry baselines and longer baseline.
Songtao Han   +7 more
doaj   +1 more source

Flight guidance concept for the launching and landing phase of a flying wing used in an airborne wind energy system [PDF]

open access: yesWind Energy Science
Airborne wind energy (AWE) is an emerging technology that harvests energy by utilizing tethered airborne systems in wind fields. Given their favorable aerodynamic characteristics, employing flying wings as airborne systems holds considerable promise for ...
D. F. Duda   +3 more
doaj   +1 more source

Adaptive Caging Configuration Design Algorithm of Hyper-Redundant Manipulator for Dysfunctional Satellite Pre-Capture

open access: yesIEEE Access, 2020
This paper presents an adaptive caging configuration design algorithm of the hyper-redundant manipulator for dysfunctional satellite pre-capture. Taking advantages of the extreme flexibility and hyper-redundancy, the hyper-redundant manipulator wraps its
Wenya Wan, Chong Sun, Jianping Yuan
doaj   +1 more source

Autonomous Rendezvous and Docking with Nonfull Field of View for Tethered Space Robot

open access: yesInternational Journal of Aerospace Engineering, 2017
In the ultra-close approaching phase of tethered space robot, a highly stable self-attitude control is essential. However, due to the field of view limitation of cameras, typical point features are difficult to extract, where commonly adopted position ...
Panfeng Huang   +4 more
doaj   +1 more source

Reconstruction of Bennu Particle Events From Sparse Data

open access: yesEarth and Space Science, 2020
OSIRIS‐REx began observing particle ejection events shortly after entering orbit around near‐Earth asteroid (101955) Bennu in January 2019. For some of these events, the only observations of the ejected particles come from the first two images taken ...
John Y. Pelgrift   +11 more
doaj   +1 more source

Development and Implementation of a Mission Data-Handling Algorithm for an Automatic Flight Guidance System

open access: yesAerospace
This paper presents a mission data-handling algorithm that provides a data link interface between a flight control computer (FCC) and a ground control station (GCS) using the protocol standard STANAG 4586, AEP-84 Volume II.
Dominik Heimsch   +5 more
doaj   +1 more source

Recursive Differential Evolution Algorithm for Inertia Parameter Identification of Space Manipulator

open access: yesInternational Journal of Advanced Robotic Systems, 2016
This paper proposes a recursive differential evolution (RDE) algorithm to identify the inertial parameters of an unknown target and simultaneously revise the friction parameters of space manipulator joints.
Zhengxiong Liu, Panfeng Huang, Zhenyu Lu
doaj   +1 more source

Multitask-Based Trajectory Planning for Redundant Space Robotics Using Improved Genetic Algorithm

open access: yesApplied Sciences, 2019
This work addresses the multitask-based trajectory-planning problem (MTTP) for space robotics, which is an emerging application of successively executing tasks in assembly of the International Space Station.
Suping Zhao, Zhanxia Zhu, Jianjun Luo
doaj   +1 more source

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