Attitude cooperative tracking control method for distributed spacecraft
A tracking control and spacecraft technology, which is applied in the field of multi-spacecraft formation flight, can solve the problems of unknown change degree of spacecraft rotational inertia, spacecraft attitude control system control input saturation, etc.
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[0082] Example
[0083] Using a formation system consisting of 4 following spacecraft and 1 leader as the research object, figure 2 A directional communication topology is given, including 4 follower spacecraft (marked as nodes 1, 2, 3, 4) and 1 navigator (marked as node 0). It can be seen that there is only the first spacecraft The device can obtain the information of the leader.
[0084] Leader trajectory: ω 0 =[0.1sin(0.2t),0.1cos(0.2t),0.1cos(0.5t)] T , with It can be obtained by kinematic equation (1).
[0085] The specific parameters of the four following spacecraft are as follows:
[0086] Table 1. Spacecraft inertia matrix and initial attitude
[0087]
[0088] Input saturation value τ 1max =[3,1,2] T Nm,τ 2max =[4,2,2] T Nm,τ 3max =[2,3,2] T Nm,τ 4max =[4,2,2] T Nm. External interference i =(0.5+||ω i || 2 )[0.02sin(t),0.05cos(t),0.03cos(t)] T , I=1,2,3,4. The initial value of the observer state and adaptive parameter is σ i (0)=[0,0,0] T , Ρ i (0)=[0,0,0] T , The ...
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