Design And Research Of Self-sensing Composite Magneto-rheological Damper

In order to meet the synchro-control demands of ordinary magneto-rheological dampers, research and develop the active and passive integrative control theory, technology and equipment, a kind of self-sensing composite magneto-rheological damper was designed, sensor technology based on inverse magnetostrictive effect, the coupling mechanism of giant magnetostrictive materials and magnetic fluids were studied in this paper. The detail work was presented as follows:In the first chapter, the inverse magnetostrictive effect and its application, the basic characteristics of magneto-rheological material and its application, research of magneto-rheological damping system control strategy and other research background were introduced. The meaning of the topics and main research content were presented.In the second chapter, the basic principles of the new self-sensing composite magneto-rheological damper was described, two key devices, built-in sensing device based on the inverse magnetostrictive effect, passive and semi-active damping device was designed.In the third chapter, a mathematical model of inverse magnetostrictive effect was established and solved; simulation and experimental study verify the correcting of the model.In the forth chapter, the fuzzy control strategy for the new kind of self-sensing composite magneto-rheological damper was established, input variables and output variables, the fuzzy and defuzification method, control rules of fuzzy controller, quantitative factor, scale factor and the sample time were determined.In the fifth chapter, model of quarter vehicle with new self-sensing composite magneto-rheological damper was established, vertical acceleration and velocity of car body in motion was simulated, the power spectrum of acceleration was plotted. Contrast to the data of ordinary vehicle, stronger damping effect of the new self-sensing composite magneto-rheological damper and fuzzy control strategy were proved. In the sixth chapter, main work in the dissertation is summarized, and further research work is put forward.