Results 21 to 30 of about 476,472 (303)

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

International 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, Lu Chen, Bin Zhang, Zhongjie Meng, Zhengxiong Liu   +4 more
doaj   +1 more source

Reconstruction of Bennu Particle Events From Sparse Data

Earth 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, Erik J. Lessac‐Chenen, Coralie D. Adam, Jason M. Leonard, Derek S. Nelson, Leilah McCarthy, Eric M. Sahr, Andrew Liounis, Michael Moreau, Brent J. Bos, Carl W. Hergenrother, Dante S. Lauretta   +11 more
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Efficient adaptive constrained control with time-varying predefined performance for a hypersonic flight vehicle

International Journal of Advanced Robotic Systems, 2017
A novel low-complexity adaptive control method, capable of guaranteeing the transient and steady-state tracking performance in the presence of unknown nonlinearities and actuator saturation, is investigated for the longitudinal dynamics of a generic ...
Caisheng Wei, Jianjun Luo, Honghua Dai, Jianping Yuan, Jianfeng Xie   +4 more
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Development and Implementation of a Mission Data-Handling Algorithm for an Automatic Flight Guidance System

Aerospace
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, Moritz Speckmaier, Daniel Gierszewski, Florian Schwaiger, Zoe Mbikayi, Florian Holzapfel   +5 more
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Multitask-Based Trajectory Planning for Redundant Space Robotics Using Improved Genetic Algorithm

Applied 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

High-Order Disturbance Observer-Based Neural Adaptive Control for Space Unmanned Systems With Stochastic and High-Dynamic Uncertainties

IEEE Access, 2021
In this paper, a high order disturbance observer based stochastic adaptive anti-disturbance control algorithm has been designed for the space unmanned systems (SUSs) with high dynamic disturbances and stochastic uncertainties.
Yao Zhang, Xin Ning, Zheng Wang, Dengxiu Yu   +3 more
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Recursive Differential Evolution Algorithm for Inertia Parameter Identification of Space Manipulator

International 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

Modeling of Stochastic Wind Based on Operational Flight Data Using Karhunen–Loève Expansion Method

Sensors, 2020
Wind has a significant influence on the operational flight safety. To quantify the influence of the wind characteristics, a wind series generator is required in simulations.
Xiaolong Wang, Lukas Beller, Claudia Czado, Florian Holzapfel   +3 more
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An Innovative Priority-Aware Mission Planning Framework for an Agile Earth Observation Satellite

Aerospace
Earth observation satellites, particularly agile Earth observation satellites (AEOSs) with enhanced attitude maneuverability, have become increasingly crucial in emergency response and disaster monitoring operations.
Guangtong Zhu, Zixuan Zheng, Chenhao Ouyang, Yufei Guo, Pengyu Sun   +4 more
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Optimal Trajectory Planning and Coordinated Tracking Control Method of Tethered Space Robot Based on Velocity Impulse

International Journal of Advanced Robotic Systems, 2014
The tethered space robot (TSR) is a new concept of space robot which consists of a robot platform, space tether and operation robot. This paper presents a multi-objective optimal trajectory planning and a coordinated tracking control scheme for TSR based
Panfeng Huang, Xiudong Xu, Zhongjie Meng
doaj   +1 more source