In order to reduce the multi-direction and broadband vibration transmitted from the helicopter rotor to the fuselage through the main reducer,a magnetorheological vibration isolation system of the helicopter main reducer with all-coefficient adaptive controller was presented.Firstly,the mechanical characteristics of the designed shear valve magnetorheological damper(MRD)were tested,and the dynamic model of the MRD was established by using the hyperbolic tangent model.Secondly,the structure scheme and working principle of the magnetorheological vibration isolation system of the helicopter main reducer were introduced,the dynamic equation of the system was derived by the Lagrange energy method,and its dynamic characteristics were simulated and analyzed.Then,according to the vibration characteristics of the main magnetorheological isolation system,an all coefficient adaptive controller based on the characteristic model was designed,and numerical simulation was carried out under the sweep excitation.Finally,a magnetorheological vibration isolation experimental platform was built,and the vertical vibration control experiment was carried out.The results show that compared with passive vibration isolation and canopy control,the all coefficient adaptive controller based on characteristic model has better vibration isolation performance and can effectively reduce the vibration transmitted from helicopter rotor to fuselage.
关键词
振动与波/磁流变阻尼器/直升机隔振/动力学特性/自适应控制
Key words
vibration and wave/magnetorheological damper/helicopter vibration isolation/dynamic characteristics/adaptive control
维普
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