Directed Graph-Based Adaptive Attitude Cooperative Control for Fractionated Spacecraft

Author(s):  
Zhaoming Li ◽  
Jiejuan Wang
2014 ◽  
Vol 1016 ◽  
pp. 649-654
Author(s):  
Ya Feng Niu ◽  
Yong Ming Gao

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.


2013 ◽  
Vol 328 ◽  
pp. 67-71
Author(s):  
Zhao Ming Li ◽  
Yong Ming Gao ◽  
Ya Feng Niu

In consideration of the disturbance influence, the system always has nonlinear terms. This paper proposes an adaptive autonomous cooperative control method for a class of nonlinear system based on the directed graph. The directed graph is used to describe the topology relationship among individuals in the system. The difference between desired and actual value of the system state is defined as error, by exchanging error information among individuals, and online-updating the nonlinear terms, all individual states are synchronized up to the desired value. The differential of the actual state is not needed, which reduces the requirements for relative measurment between individuals efficiently. Finally, the numerical simulation results show the correctness of the control law, and by configuring the control parameters reasonably, we can achieve high degree of control accuracy.


2013 ◽  
Vol 710 ◽  
pp. 558-562
Author(s):  
Zhao Ming Li ◽  
Ya Feng Niu ◽  
Yong Ming Gao

This paper proposes an autonomous cooperative control method for a class of linear system based on the directed graph, and the proof is given. The directed graph is used to describe the topology relationship among individuals in the system. The difference between desired and actual value of the system state is defined as error, and by exchanging error information among individuals, all individual states are synchronized up to the desired value. The control algorithm proposed in this paper has high robustness. Finally, the numerical simulation results show the correctness of the control law, and by configuring the control parameters reasonably, we can achieve high degree of control accuracy.


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