Circular To Expand Antenna Deployment Dynamics Analysis And Intelligent Control

The large Hoop Truss Deployable Antenna (HTDA) in the space, with large aperture, light mass, big flexible character and so on, is type flexible multi-contact system. The deployable character can not be described by the ordinary antenna model, which all parts are looked as ligidity, but it is accurate for model in type flexible multi-contact system theory. The flexible-distorted dimension of parts is crucial factor whether HTDA can stably outspread and work in normal. Because there is uncertain non-linear and multi-variable character varied from time during outspread process of HTDA, so the online and real-time control system must be designed, which would keep flexible-distorted dimension of all parts in allowable bound.In this paper, based on researchful demand for one type satellite antenna, go deep into studying on deployable dynamics and flexible-distorted control, which would give well technical base to libration and stable expandedness during the outspread process of HTDA. The work and innovation is follow.1. First objecting in circular-symmetrical character about axis of HTDA, select a parallelogram truss element as the simplest physical model of system and study on it, based on equivalent-transpositional theory for machine, set up rigid body dynamic equation of system and go dynamic respond analysis.2. Based on rigid body dynamic response analysis, unite finite element technology and Lagrange equation to fetching elastic dynamic equation in flexible multi-contact dynamic method. At the same time, work out dynamic result on MATALAB and go deep into analyzing results.3. Objecting on complexity for outspread process of HTDA, apply three-floor BP net to identifying system and set up identifiable dynamic model.4. Based on identifiable dynamic model, design intelligent online and real-time control system with forecast and optimization in time for system state, and compile control program on MATALAB.The dynamic simulation results show that it is successful to dividing flexible multi-contact dynamics into rigid body dynamics and elastic dynamics and applying to studying on HTDA, which along avoid fussy program design for idiomatic vector method in flexible multi-contact dynamics and the model is same precision. At the same time, the control simulation results show that the system performs very well in control accuracy, stability, adaptability and robustness and appeases control request.