Parametric Study of Ground-Track Based Performance Measure Requirements for the Optimization of Near Earth Twin-Spacecrafts Trajectory

2012 ◽  
Vol 225 ◽  
pp. 429-436
Author(s):  
Harijono Djojodihardjo ◽  
A. Aq'Grabin A. Gunter ◽  
Renuganth Varatharajoo
Keyword(s):  
Relative Motion ◽  
Parametric Optimization ◽  
Performance Measure ◽  
Environment Monitoring ◽  
Satellite Formation ◽  
Ground Track ◽  
Performance Metric ◽  
Optimization Study ◽  
Overlap Area ◽  
Relative Motion Dynamics

Parametric optimization study is carried out on performance measure for assessing the benefits of relevant ground-track parameters and Instantaneous Overlap Area (IOA) in near earth and near-equatorial twin-satellite formation flying to explore its potential as space platform oriented towards Tropical Resources and Environment Monitoring mission. The present study also emphasizes two aspects: the dynamics of relative motion of multiple spacecrafts and the desirable ground tracks such missions. Relative motion dynamics incorporating Clohessy-Wiltshire Equation for circular orbits is used as a reference. The performance metric is synthesized as a tradeoff between exact definition and intuitive judgment.

Aerobrake Parametric Optimization Study

1993 ◽  
Vol 13 (1) ◽  
pp. 51-65 ◽  
Author(s):  
Resit Unal ◽  
Lance B. Bush ◽  
James M. Ball ◽  
Kristen R. Lindegren
Keyword(s):  
Parametric Optimization ◽  
Optimization Study

scholarly journals Comprehensive Survey and Assessment of Spacecraft Relative Motion Dynamics Models

2017 ◽  
Vol 40 (8) ◽  
pp. 1837-1859 ◽  
Author(s):  
Joshua Sullivan ◽  
Sebastian Grimberg ◽  
Simone D’Amico
Keyword(s):  
Relative Motion ◽  
Comprehensive Survey ◽  
Dynamics Models ◽  
Relative Motion Dynamics ◽  
Motion Dynamics

Parametric optimization study of a multi-burner flameless combustion furnace

2011 ◽  
Vol 31 (14-15) ◽  
pp. 3000-3008 ◽  
Author(s):  
B. Danon ◽  
E.-S. Cho ◽  
W. de Jong ◽  
D.J.E.M. Roekaerts
Keyword(s):  
Parametric Optimization ◽  
Flameless Combustion ◽  
Optimization Study

scholarly journals Relative Motion Dynamics Modeling and Control of DFP Vibration Isolation Spacecraft

2019 ◽  
Vol 37 (4) ◽  
pp. 673-681
Author(s):  
Yongxing Tang ◽  
Zhanxia Zhu
Keyword(s):  
Relative Motion ◽  
Vibration Isolation ◽  
Dynamics Modeling ◽  
Modeling And Control ◽  
Task Requirements ◽  
System Vibration ◽  
And Control ◽  
Couple Effect ◽  
Relative Motion Dynamics ◽  
Motion Dynamics

In order to better meet the future high precision task requirements, the DFP(Disturbance-Free Payload) spacecraft composed of non-contact PM(Payload Module)and SM(Support Module)is taken as the object to study the relative motion dynamics modeling and control between the two modules and verify the system vibration isolation performance. Firstly, the force and torque expressions of the two modules are derived by simplifying the configuration and analyzing the stress. In view of that couple effect, the relative motion dynamics equations between two modules of DFP spacecraft with high model accuracy, and simple and uniform format are established with the dual quaternions. Based on this, the PD control law is designed, and the relative motion of PM and SM could meet DFP spacecraft working requirements when the measurability of control quantity and the measurement error of sensors were taken into account. Simulation results verify the advantage of vibration isolation and attitude maneuverability of DFP spacecraft.

scholarly journals A Simulation Study Of Economic Production Quantity Lot Size To Kanban For A Single Line Production System Under Various Setup Times With Completion Time As Performance Metric

2011 ◽  
Vol 7 (10) ◽  
Author(s):  
Terrence J. Moran ◽  
Marvin Troutt
Keyword(s):  
Completion Time ◽  
Setup Time ◽  
Performance Measure ◽  
Total Completion Time ◽  
Lot Size ◽  
Line Production ◽  
Economic Production Quantity ◽  
Performance Metric ◽  
Economic Production ◽  
Production Quantity

<h1 style="page-break-after: auto; text-align: justify; line-height: normal; margin: 0in 0.5in 0pt; mso-pagination: none;"><span style="color: black; font-size: 10pt; font-weight: normal;"><span style="font-family: Times New Roman;">The Setup time variable was evaluated for the two systems (Kanban and EPQ) against the performance measure of total completion time.<span style="mso-spacerun: yes;">&nbsp; </span>EPQ outperforms Kanban on total completion time.<span style="mso-spacerun: yes;">&nbsp; </span>The research helped clarify for practitioners whether EPQ might be more suitable than Kanban for their given situations.<span style="mso-spacerun: yes;">&nbsp; </span></span></span></h1>

Toward a Unified Performance Metric for Benchmarking Steganography Systems

2019 ◽  
Vol 29 (03) ◽  
pp. 2050042 ◽  
Author(s):  
Tamer Rabie ◽  
Mohammed Baziyad ◽  
Talal Bonny ◽  
Raouf Fareh
Keyword(s):  
Performance Measure ◽  
Multimedia Data ◽  
Performance Metric ◽  
Recent Advances ◽  
Comparative Results ◽  
Measurement Metric ◽  
Quality Robustness

Recent advances in network speeds for exchanging multimedia data over insecure networks has resulted in an increased interest in steganography techniques. These techniques are usually evaluated based on their performance in three attributes; namely, capacity, imperceptibility, and robustness. Each of these attributes has its own measurement metric. Hence, comparing two different steganography schemes based on these individual metric tools becomes inconsistent. In this paper, a novel measurement metric tool is introduced for benchmarking steganography schemes. This new tool, named the “Combined Capacity-Quality-Robustness Effectiveness” (CCQRE) metric, combines the three opposing attributes of a steganography system into one conglomerate performance measure. Comparative results demonstrate the effectiveness of the proposed CCQRE metric for benchmarking various steganography schemes based on the researcher’s interest in capacity, imperceptibility, or robustness.

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