Study Of Shock Absorption Control For Electrical Building And Elevated Electric Device

Due to particularity of eclectrical building, biggish space needed to place transformer equipment in eclectrical building and strict technics requirement, at the same time, cable diaposed in the vertical of building and cable way exiting in partial floorslab, these factors arouse buildings possess dissymmetry distributing of stiffness and mass. So under the effect of earthquake excitation, torsional response of this type of building will couple lateral seismic response and the degree of building collapse is increased. Aimed to the torsional of this type of buildings and combined to the sequential optimal control algorithm proposed by the author's research team based on the advantages of other optimal control algorithms. This paper has realized the control of torsional coupled seismic response for electrical building by this control algorithm. By the control for torsional coupled seismic response of a four-story asymmetrical frame communication building in transformer substation, the numerical results show that the sequential optimal control algorithm can effectively control lateral seismic response of structure and reduce torsional coupled seismic response of bidirectional eccentricity structure more effectively. So this algorithm has wide application prospect in engineering.Control algorithm is the key part of structure vibration contoller and the control system with excellent control effect has to be equipped prominent control algorithm. For the complexity and particularity of vibration control for building structures, many research findings of control algorithms can not be used to engineering practice. Therefore, the key problem for realizing engineering practice of vibration controller is to study the control algorithm that is fitted for the vibration controller to building structures. An improved algorithm for optima control of structures subjected to earthquake excitation is presented based on the way in which the earthquake is input to a structural system, namely single predicted optimal control algorithm. The control objective function is constituted at every time step and the calculation is realized by using the numerical method of state transition. An expression of control force is obtained, which includes both the effect of initial structural response and initial external seismic excitation of this time step. The model for calculating the control force is conceptually improved compared to existing instantaneous optimal control algorithm. An expression of optimal control force coefficients is derived in replacement of the solving of traditional Riccati equation, which is a differential equation, and the efficiency of the calculation is thus improved. Then computation procedure of this control algorithm is realized by MATLAB and simulation result shows that the single predicted optimal controlalgorithm can decrease the response of structure effectively and this control algorithm is advantageous over the classical optimal control and instantaneous optimal algorithms in terms of control efficiency by the analysis of seismic response to the electrocal direction center base isolated structure equipped active controller, namely smart isolation. Finally the single predicted optimal control algorithm, classical optimal control algorithm and instantaneoue optimal algorithm are all stable by analyzing stability of three control algorithms. But the convergent speed of improved algorithm in response of phase plane locus is most rapid among three control algorithms, this shows the stability of improved algorithm is better than the other two optimal control algorithms.Aimed to the vibration control of elevated electric device, New-style isolation device is presented, which has small horizontal stissness and the difference of which with rubber-lead bearing is that this device can resist biggish vertical tensile force. Therefore the isolation of elevated electric device is realized. This device shows superior shock absorption effect by simulation analysis for vibration control of 330KV voltage transformer. Finally experiment valides the effectiveness of this device.