Parametric Mass Estimating Relationships for Earth Imaging Monolithic and Fractionated Spacecraft

2018 ◽  
Vol 55 (5) ◽  
pp. 1083-1097 ◽  
Author(s):  
M. Gregory O’Neill
Keyword(s):  
Fractionated Spacecraft

Cooperative Tracking Control for Formation Keeping of Fractionated Spacecraft Based on Error Exchanging

2014 ◽  
Vol 1016 ◽  
pp. 649-654
Author(s):  
Ya Feng Niu ◽  
Yong Ming Gao
Keyword(s):  
Tracking Control ◽  
Cooperative Control ◽  
Sliding Mode ◽  
Control Law ◽  
Velocity Information ◽  
The Stability ◽  
Cooperative Tracking ◽  
Fractionated Spacecraft ◽  
High Degree ◽  
Formation Keeping

This paper discusses the cooperative control for formation keeping of fractionated spacecraft, which is a new concept in recent years. For system of second-order differential equations of formation flying dynamics, knowledge of graph and consensus theory is introduced in study. By means of the idea of sliding mode control, we design a tracking control law for time-varying desired signal. Via exchanging error information among modules, the control law can make errors synchronized up to zero to achieve tracking. Relative velocity information between modules is not needed in this control law, which will efficiently reduce the requirements for relative navigation between modules. Then we prove the stability of the control system. Finally numerical simulation results show the effectiveness of the control law. By configuring the control parameters reasonably, we can achieve high degree of control accuracy.

Hybrid Approach to Optimize the Cluster Flying Orbit for Fractionated Spacecraft Based on PSO-SQP Algorithm

2013 ◽  
Vol 341-342 ◽  
pp. 1144-1149 ◽  
Author(s):  
Sheng Hui Wan ◽  
Jun Ling Song ◽  
Jian Chen ◽  
Min Hu
Keyword(s):  
Optimization Problem ◽  
Particle Swarm Optimization Algorithm ◽  
Hybrid Approach ◽  
Orbital Elements ◽  
Constrained Optimization Problem ◽  
Sqp Algorithm ◽  
Hybrid Particle Swarm Optimization ◽  
Design Requirements ◽  
Fractionated Spacecraft ◽  
Optimal Cluster

This template This paper investigates the optimal cluster flight orbit design issue for the fractionated spacecraft according to three main goals: keeping the cluster as stable as possible, preventing the collisions within the cluster, maintaining the inter-satellite distance within the maximum region. Firstly, the relative orbital elements are adopted to describe the relative motion. Then, the formation design requirements are formulated in terms of the relative orbital elements, the constrained optimization problem is solved using the hybrid particle swarm optimization algorithm integrated with sequential quadratic programming local search. The simulation results show that the hybrid PSO-SQP algorithm is effective.

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