Theoretical Study Of High-rise Building Structural Vibration Control Based On Decentralized Control

In recent years, the development of China’s construction industry is rapid, high-rise buildings, especially super high-rise buildings in the city, become a city landmark. At the same time, global is in earthquake prone period at present, hard "anti" measures, such as by increasing the size of component, high strength materials, are mainly used at present most of the structural design of the seismic and wind resistant measures. It not only increases the cost, but also because of the uncertainty of the load, it is difficult to achieve the desired results. With the higher and more flexible in the direction of the building structure, structural vibration control structures for earthquake opened up a new path. But decades of structural vibration control was limited to centralized control, centralized controller itself is a single point of potential failure; a failed controller may cause paralysis of the entire control system. To overcome these inherent challenges, decentralized control mode emerged. In this paper, high-rise building structural model is studied, theoretical analysis and calculation methods of decentralized vibration control were studied. Introduces the contents of several of the following areas:First, we develop three kinds of centralized control algorithm theory, namely, linear quadratic (LQR) classical optimal control, sliding mode control and output feedback H∞ control. And through MATLAB simulation calculation can be seen from the simulation results, centralized active control algorithms can effectively reduce the seismic response of structures. Pave the way for further research.Second, centralized control strategy prone to various problems raised decentralized control strategy, and contains principles and linear quadratic optimal (LQR) control theory combined decomposition by extending the control system and coordinate contraction obtain overlapping decentralized controllers export overlapping decentralized optimal control algorithm;Third, the uncertainty of the building structure of the system, from the vibration control robustness starting H∞ control theory based on centralized and decentralized multi-overlapping theory proposed combining multi-overlapping decentralized H∞ robust control methods. Simulation results show that the overlapping decentralized control and centralized control with a similar control effect and reduces the centralized control may be at risk of paralysis. Consider the structural rigidity uncertainty on overlapping decentralized control method, numerical simulation prove its good robust stability, not because of changes affecting its structural stiffness control.Finally, the controller for high cost, poor economic structural vibration control problems. Decentralized control theory based on the overlap of the two overlapping decentralized control method of the control parameters are optimized, and the number of sub-division of decentralized control optimization study has been divided. Simulation results show that when the 20-story Benchmark model is divided into four sub-control when its best.Numerical simulation shows that the proposed decentralized control method has good robustness, and control effects is similar to centralized control, and likely to fail to overcome the problem of centralized control, more realistic.