Hamiltonian Structure-Based Formation Flight Control Along Low-Energy Transfer Trajectory

2020 ◽  
pp. 1-15
Author(s):  
Yu Cheng ◽  
Christian Circi ◽  
Yijun Lian
Keyword(s):  
Energy Transfer ◽  
Flight Control ◽  
Hamiltonian Structure ◽  
Formation Flight ◽  
Low Energy ◽  
Transfer Trajectory ◽  
Low Energy Transfer

scholarly journals Enhanced Hybrid Differential Evolution for Earth-Moon Low-Energy Transfer Trajectory Optimization

2018 ◽  
Vol 2018 ◽  
pp. 1-17
Author(s):  
Yanyun Zhang ◽  
Lei Peng ◽  
Guangming Dai ◽  
Maocai Wang
Keyword(s):  
Energy Transfer ◽  
Differential Evolution ◽  
Trajectory Optimization ◽  
Transfer Problem ◽  
Low Energy ◽  
Initial Condition ◽  
Transfer Trajectory ◽  
De Algorithm ◽  
The Earth ◽  
Low Energy Transfer

It is known that the optimization of the Earth-Moon low-energy transfer trajectory is extremely sensitive with the initial condition chosen to search. In order to find the proper initial parameter values of Earth-Moon low-energy transfer trajectory faster and obtain more accurate solutions with high stability, in this paper, an efficient hybridized differential evolution (DE) algorithm with a mix reinitialization strategy (DEMR) is presented. The mix reinitialization strategy is implemented based on a set of archived superior solutions to ensure both the search efficiency and the reliability for the optimization problem. And by using DE as the global optimizer, DEMR can optimize the Earth-Moon low-energy transfer trajectory without knowing an exact initial condition. To further validate the performance of DEMR, experiments on benchmark functions have also been done. Compared with peer algorithms on both the Earth-Moon low-energy transfer problem and benchmark functions, DEMR can obtain relatively better results in terms of the quality of the final solutions, robustness, and convergence speed.

Design and optimization of low-energy transfer orbit to Mars with multi-body environment

2015 ◽  
Vol 58 (10) ◽  
pp. 1660-1671 ◽  
Author(s):  
Yi Lu ◽  
HengNian Li ◽  
JiSheng Li ◽  
Zheng Che ◽  
YiKang Yang ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Low Energy ◽  
Design And Optimization ◽  
Transfer Orbit ◽  
Low Energy Transfer ◽  
Multi Body

R-matrix parametrizations of low-energy transfer reactions

1998 ◽  
Vol 639 (3-4) ◽  
pp. 733-747 ◽  
Author(s):  
C. Angulo ◽  
P. Descouvemont
Keyword(s):  
Energy Transfer ◽  
Low Energy ◽  
Transfer Reactions ◽  
R Matrix ◽  
Low Energy Transfer

Pathophysiology of ballistic trauma

2016 ◽  
Author(s):  
Michael C. Reade ◽  
Peter D. Thomas
Keyword(s):  
Energy Transfer ◽  
Kinetic Energy ◽  
Pressure Wave ◽  
Mass Movement ◽  
High Energy ◽  
Low Energy ◽  
Wound Contamination ◽  
Blast Fragmentation ◽  
Low Energy Transfer ◽  
Ballistic Trauma

Bullets and other projectiles cause ballistic trauma. Explosions wound by the effect of a blast pressure wave, penetrating fragments propelled by the explosion, the mass movement of gas interacting with the casualty or the environment, and miscellaneous effects. Most blast casualties surviving to hospital care will not have significant pressure wave injury, but some will. Blast fragmentation most commonly resembles other types of low energy transfer ballistic trauma.. The effect of bullets depends on the kinetic energy transferred and the nature of the tissues struck, with energy transfer partly determined by bullet design. Low energy transfer bullets wound by crushing and laceration, limited to the tissues struck. High energy bullets may impart kinetic energy to surrounding tissues, causing a temporary cavity which sucks in debris and damages tissues sometimes well beyond the bullet track. Predicting the extent of devitalization can be difficult at the time of initial inspection. Wound contamination, particularly with soil, may modify the usual conservative approach to initial debridement.

Design of low-energy transfer from lunar orbit to asteroid in the Sun-Earth-Moon system

2014 ◽  
Vol 30 (6) ◽  
pp. 966-972 ◽  
Author(s):  
Ya-Min Wang ◽  
Dong Qiao ◽  
Ping-Yuan Cui
Keyword(s):  
Energy Transfer ◽  
Low Energy ◽  
Lunar Orbit ◽  
The Sun ◽  
Moon System ◽  
Low Energy Transfer
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