Magnetorheological Damper On The Lunar Landing Vehicle Soft Landing In The Process Of Theoretical And Applied Research

Like Electro-Rheological (ER) fluid, Magneto-Rheological (MR) fluid is also a new kind of smart material. Under the high magnetic field, it can be transformed from Newton fluid into visco-plastic solid. The dampers based on MR fluid possess the virtue of simple device and small bulk. And it requires few power and can continually change its state which is reversible. It is a kind of ideal control device to implement semi-active control. The technology correlated to MR is gradually set store by people, and it is gradually applied to practical project from theoretical research in lab.This paper mainly presents the current state of research and the degree of development of the MRF. The mechanism, material composition and characteristics of MRF are especially studied. The common models of damping force of MRF dampers and its' application are comprehensively analyzed. Simple comparison is made between ER and MR fluids. MRF is much greater than ERF in application because of the virtue of MRF, in which the high yielding stress can be obtained easily during the greater range of temperature.Foreign lunar soft- landing damping systems in the last years are analyzed and studied. According to the virtue of MRF, lunar soft- landing damping system based on MRF dampers is developed.The predigested calculating model about lunar soft- landing damping system is established in the course of landing shock. The dynamic computer simulation model is established according to the structure parameters. The results of the computer simulation show that lunar soft- landing damping system based on MRF dampers is effective and practical as well.