Experimental research of Magneto-Rheological recoil control system
ZHANG Lijie1 Chang Jiadong1 Wang Jiong2
1.Dept. of Mechanical Engineering, Luoyang Institute of Science and Technology, Luoyang 471023; 2. School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094
Abstract：Since the critical demand for time response of MR damper for gun recoil buffering applications, experimental studies of MR recoil control system are carried out on an impact test rig with the special designed MR damper. Impact performance of the MR damper under fixed operating current is obtained, which is described by a physical model. Time response of the MR damper’s coil current and the damping force are respectively tested, then trajectory tracking control scheme for MR recoil system is put forward, so that the MR adjustable damping force can accurately track the ideal reference curve. Experimental results with 3g and 4g powders under double close-looped feedback control, as well as the fixed damping curve without feedback are obtained. By comparisons, the feedback control can efficiently reduce the response time of the damping force and provide more rapid tracking ability. With the same displacement, smaller peak of recoil force is produced, while with the same peak of recoil force, more less displacement is achieved. Finally, for decline of the damping force curve with 4g powders, it’s suggested the adjustable coefficient of the damping force, as an important parameters must be large enough in MR dampers’ structural design.
2014, Vol. 33 
