Performance simulation and experimental evaluation for a magnet-rheological damper under impact load

Many investigations have been done on low velocity and frequency applications of MR devices. The main purpose of this paper was to analyze the behaviour of the long-stroke MR damper under impact load and establish its dynamic model. Their relationships between some important designed parameters have been investigated in detail. According to the simulation result, a novel large-scale single-ended MR damper without the accumulator was designed and developed as the specimen. In order to simulate MR damper´s performance under impact load, fuzzy controller and fuzzy PID controller were exploited to evaluate their controllability. Besides, a suit of intelligent monitoring and controlling system which used a closed bump to produce an impact load for MR damper was designed and exploited. Experiment results indicated that the designed MR damper could effectively reduce the shock vibration and achieve good control effect. Compared to other control methods, the fuzzy control strategy could reduce off 20% its displacement and pressure of MR damper under impact load.