The Model Predictive Control To Wind-Induced Vibration On Long-Span Spatial Lattice Structures

The long-span spatial reticulated structures (LSRS) are significantly of the contemporary new structure shapes. By virtue of alternatively meeting the Architect's figurational and functional requirements, it has been tremendously developed during previous decades. Nevertheless, the existing structural design codes of LSRS are merely treating those dynamic loadings of earthquake and wind as the equivalent constant loadings. There are researches demonstrating that the LSRS's sensibility and severity to wind-induced vibration are no less than skyscrapers and bridges. Consequently, how to reduce the damage of such structures under wind dynamical loads has been becoming a hot-spot of corresponding research.Because of the difficulty of predicting the dynamic loadings, those classical control strategies have not yet been able to generate the system model exactly in spatial structures, or even make worse control effects. On the other hand, the LSRS has a complicated input/output system with high-dimensions, which also strengthens the inaccessibility of control modeling.This dissertation pays attention to a model predictive control (MPC) theory, and established a wind-induced vibration control model of LSRS. By means of using different feedback (Single/Multi-DOF feedback and Single/Multi-Nodes) schemes and improving reference trajectories (considering decaying functions), some numerical analysis had been done. Besides, the robustness and reliability of MPC strategy had also been discussed by varying the model configurations, e.g. the mass and stiffness matrices. Furthermore, another predictive algorithm named Newmark-beta semi-active control method based on structural dynamics was also illustrated here. Its robustness was discussed also. Using the improved predictive control method, the numerical analyses were investigated with two typical spatial structures under different wind loads. The robustness and efficiency of the predictive control strategies were discussed also. Finally some conclusions were drawn out.