Attitude and orbit coupled control and simulation of spacecraft formation by using intelligent adaptive control based on characteristic model
Regarding to the relative attitude and orbit of spacecraft formation flying, a nonlinear dynamic model of six degree of freedom coupled with attitude and orbits established, with the help of characteristic model, this paper mainly analyzes the factors of the spatial perturbation and multiple disturbance torques, a kind of intelligent adaptive controller is designed based on the combination of RBF neural network and the golden section adaptive control. Later, the simulation platform Jade is used to simulate and analyze the Multi-Agent system of spacecraft formation. The results show that the spacecraft formation can run along in the ideal orbit, the effect of the control system has good robustness, fault tolerance and intelligence.
Modeling the Coupled Translational and Rotational Relative Dynamics for Formation Flying Control
This paper is concerned with the modelling of the relative translational and rotational dynamics between two satellites flying in formation. In particular, the derivation of the governing equations of motion is detailed, and a metrology model of a lateral error sensor is given. The main interest lies in the highprecision measurement phase, i.e. the dynamics are linearized w.r.t. the nominal configuration of the formation. Furthermore, the linear fractional transformation (LFT) is used in order to model varying parameters and parameters flawed with tolerances, e.g. mounting points and orientations of optical instruments.
An introduction to human geography : the cultural landscape
1. Thinking Geographically 2. Population 3. Migration 4. Folk and Popular Culture 5. Language 6. Religion 7. Ethnicity 8. Political Geography 9. Development 10. Agriculture 11. Industry 12. Services 13. Urban Patterns 14. Resource Issues Conclusion