In order to research the vibration control of weak coupling antenna structures in satellite,a dynamics model of this kind of structure is established through the finite element method,by which the dynamic characteristics of the disordered and perfect structures are investigated respectively.Active vibration control of the structure is studied by applying neural networks predictive(NNP) control method and linear quadratic regulator(LQR) control method respectively.Simulation results show that little disorder of the weak coupling antenna structure can induce remarkable mode localization of vibration.The vibration control effects of NNP method are superior to those of LQR method,and NNP method has good performance on the occurrence of model mismatch induced by the structure disorder.The disorder must be considered seriously in active vibration control of weak coupling antenna structures.