Cognitive communications for NASA space systems [International Communications Satellite Systems Conference]

2019 ◽  
Author(s):  
D. Chelmins ◽  
J. Briones ◽  
J. Downey ◽  
G. Clark ◽  
A. Gannon
Keyword(s):  
Space Systems ◽  
Satellite Systems ◽  
Cognitive Communications

Contact Dynamics of Reconfigurable Space Systems With Numerical Verification Method

2001 ◽  
Author(s):  
Takashi Takahashi ◽  
Saburo Matunaga
Keyword(s):  
Numerical Computation ◽  
Contact Dynamics ◽  
Numerical Verification ◽  
Space Systems ◽  
Guaranteed Accuracy ◽  
Experiment System ◽  
Verification Method ◽  
Satellite Systems ◽  
Cluster Satellite ◽  
The Difference

Abstract In order to analyze dynamics of space systems, such as cluster satellite systems and the capturing process of damaged satellites, it is necessary to consider such space systems as reconfigurable multibody systems. In this paper, we discuss the numerical computation of the dynamics of the ground experiment system to simulate the capturing and berthing process of a satellite by a dual-manipulator on the flat floor as an example. We have previously discussed the efficient dynamics algorithm for reconfigurable multibody system with topological changes. However, the contact dynamics, which is one of the most difficult issues in our study, remains to be discussed. We introduce two types of the linear complementarity problem (LCP) concerned with contact dynamics. The difference between the two types of LCP is whether impacts can be considered. Dynamic systems with impacts and friction are non-conservation systems; moreover the LCP is not always solvable. Therefore we must check if the solutions of the numerical computation are correct, or how accurate they are. In this paper, we derive the method of numerical computation with guaranteed accuracy of the LCP for contact dynamics.

scholarly journals Federated Space Systems Tradespace Exploration for Strategic Robustness

2021 ◽  
Author(s):  
Jordan L Stern ◽  
Paul T. Grogan
Keyword(s):  
Net Present Value ◽  
Space Systems ◽  
Present Value ◽  
Satellite Systems ◽  
Commercial Space ◽  
Design Variables ◽  
Game Theoretic ◽  
Space Economy ◽  
Tradespace Exploration ◽  
System Designs

Motivated by the growth of the commercial space economy and renewed focus on the disaggregation of military space systems, this work develops a method for conceptual design of federated satellite systems as a collaborative system-of-systems (SoS). Objectives seek to improve the likelihood of successful SoS formation and pursue constituent system utility robustness. The proposed metaheuristic optimization tradespace exploration method accounts for technical and economic design variables and multi-decision maker strategy dynamics. Constituent system designs are ranked on their simulated net present value. A game-theoretic measure of risk dominance is used in concert with net present value to assess robustness and utility of candidate SoS designs. The method is validated with a notional application case that assesses potential collaboration between Earth observing and telecommunications systems. Results demonstrate a fundamental trade between system efficiency and robustness and highlight the importance of accounting for strategy dynamics when designing systems for collaboration.

Development system of metrological maintenance for radio-navigation fields of satellite systems

2001 ◽  
Vol 7 (4) ◽  
pp. 122-125
Author(s):  
V.N. Roman'ko ◽  
◽  
E.N. Khomyakov ◽  
S.T. Cherepkov ◽  
◽  
...  
Keyword(s):  
Development System ◽  
Satellite Systems ◽  
Radio Navigation

Efficiency evaluation of remote sensing space systems based on hierarchy analysis method

2005 ◽  
Vol 11 (3-4) ◽  
pp. 75-80 ◽  
Author(s):  
O.D. Fedorovskyi ◽  
◽  
V.G. Yakimchuk ◽  
E.N. Bodnar ◽  
Z.V. Kozlov ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Efficiency Evaluation ◽  
Space Systems ◽  
Analysis Method ◽  
Hierarchy Analysis

A combined investigation of the territory of Ukraine on the basis of geophysical parameters with the use of «Sich-1M» and «Microsputnik» space systems

2003 ◽  
Vol 8 (5-6) ◽  
pp. 174-179
Author(s):  
A.V. Agarkov ◽  
◽  
A.L. Makarov ◽  
S.A. Matvienko ◽  
A.V. Meleshko ◽  
...  
Keyword(s):  
Space Systems

Network and Protocol Architectures for Future Satellite Systems

2017 ◽  
Author(s):  
Tomaso de Cola ◽  
Alberto Ginesi ◽  
Giovanni Giambene ◽  
George C. Polyzos ◽  
Vasilios A. Siris ◽  
...  
Keyword(s):  
Satellite Systems
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