| Civil engineering structures in environments known for high seismic activity or large wind speed could potentially experience structural vibrations.Reasonable application of structural vibration control technology can effectively reduce the influence of external forces,improve the anti-wind performance and extend the service life.The traditional vibration control technology adopts wired control method,which has the disadvantages of complicated wiring,difficult maintenance,high cost and poor flexibility.And use wireless control mode,does not need a lot of cable equipment and can change the sensor nodes at any time,save installation costs,reduce the maintenance cost of the system and increase the flexibility of the system,wireless control system also has the advantages such as high reliability and portability and easy to implement based on advanced wireless communication technology.For large,complex structure of civil engineering,the traditional centralized control strategy has the initial defects,because with the increase of degree of freedom structure,system need to collect and focus on the status of information which increases more,this will make information transmission and control operation complicated.Working in the situation of the bad communication environments and the controller hardware with continues working will reduce the system reliability and stability,the central controller once paralyzed,system will collapse.In addition,the local structure reduced itself,which is caused by injury and other reasons,based on the partial state feedback decentralized control is easier to make effective reaction to reduce the damage of the structure of the interlayer displacement,and based on the concentration of global state feedback control can't make effective quick response.Therefore,it is a great significance to study the application of decentralized vibration control technology to large and complex vibration control technology of civil structures.According to the above problem,this article is based on overlapping decentralized control algorithm for numerical simulation is carried out five layer model,the simulation respectively in the free vibration response and EI Centro seismic wave excitation response under two conditions,at the same time the controller failure,structural damage and control simulation system normal three simulation experiment,and concentrated LQG control scheme for reference.The simulation results show that the structural damage simulation experiment,the local state information for more sensitive overlapping decentralized control effect is better than that of the control system of centralized LQG control system scheme,fault in the controller and system to work normally,two experiments on overlapping decentralized control systems control effect and the centralized control system,but on the interlayer displacement response performance better.This article is based on three layer model was designed by the overlapping decentralized control algorithm wireless distributed control system and the earthquake excitation experiments,displacement of the system with laser displacement sensor to collect information,through the WIFI nodes for wireless transmission,DSPACE as controller embedded overlapping decentralized control algorithm to control calculation,AMD actuator control over three layers of spring steel frame model.The system have been conducted under earthquake excitation system to work normally and the controller failure two experiments,the experimental results show that this design of wireless distributed control system has good control effect,compared with the centralized control system design of a higher flexibility and high energy consumption,in the department of molecular controller failure can effectively guarantee the system control effect,enhance the reliability of the system.The research content of this paper is to promote the application of wireless decentralized control technology in vibration control of large civil engineering structures. |
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