Dynamics and Control for Tethered Satellite Systems in a Halo Orbit
2015年04月06日 16:45 点击：
Tethered Satellite Systems(TSS) have been proven to be the new technique of space exploration, to have the fabulous potentiality for future space application, and to present continuously new research. We shall develop the complex dynamics model of TSS comprised of n point masses and interconnected arbitrarily by m idealized tethers in a Halo orbit about the libration points to study really flexible tether dynamics characteristics including the tether vibration, in particular, the coupling motion of tethered satellites and tether vibration. The non-linear feed-back method, such as the feedback linearization technique(FLT), that are more suitable for controlling highly nonlinear, non-autonomous, coupled systems during deployment and retrieval processes, is used to combine and compare with the other control laws for regulating the attitude motion of TSS. The robust method such as the linear quadratic Gaussin/loop transfer recovery(LQG/LTR) in combination with the prise integration method is first chosen to control the tether vibration using the variable tether attachment point or offset motion for deeply understanding the characteritics of the tether vibration. Next, the coupling effect of the attitude motion and tether vibration is study. In addition, a fast, prise,real-time and easy-implementation controller is developed by combining and comparing with each other in order to realize the synchronous control of the coupled motion. The reliably theoretic and practical foundation is provided for our nation��s space exploration and safety.
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