The Research Of Semi-active Control Of Bilding's Base Isolation With Magneto-rheological Damper

In recent years, the research on structural vibration control has developed considerably. The semi-active control combines the advantages of the active control and passive control, it has the same reliability as the passive control, and the strong adaptability as the active control, it can also achieve the effect of the active control through certain algorithms. The device of semi-active control system is simple and needing little energy in the system. So the semi-active control has become one of the most promising methods in the field of structural vibration control. There are various types of device used for semi-control system, one of the best device is magneto-rheological damper, which can take the initiate to adjust its own parameters according to effect of the structural vibration. so that the vibration control of MR can work good. Large amplitude vibration will happen in superstructure under the earthquake especially major earthquake, and it will cause great damage. In order to reduce earthquake damage to the structure, at present, the common used method is setting rubber bearings in the base and increasing the damper of upper structure. But under major earthquake it will out of work, so in this paper the author's research focus on located MR in the house's base and use MATLAB to simulate the upper structure under the earthquake.In this paper, the author makes a systematic study for the theory of semi-active control based on magneto-rheological damper.Firstly, this paper reviews the progress and status of MR, and give a comprehensive evaluation to semi-active control study based on magneto- rheological dampSecondly, MR damper's mechanics of the model was studied. and we introduced the advantage and disadvantage of all kinds of MR damper, in accordance with the characteristics of MR damper, phenomenon model was used for the calculation.Thirdly, MR dampers for vibration control theory and the MR damper design methods were studied in this paper.This paper gives a detailed description to several control strategies for semi-active control with magneto-rheological damper, and discusses the problems and its solutions.At last, this paper gives a simulation to the semi-active control of building's base isolation with magneto-rheological damper used MATLAB verified the effectiveness of base isolation with magneto-rheological damper.