Magnetorheological Damper Under Impact Loading Buffer Control Algorithm Research

Investigations on the design of controllable magnetorheological (MR) fluid devices have focused heavily on low velocity and frequency applications. The extensive work in this area has led to a good understanding of MR fluid properties at low velocities and frequencies. However, the issues concerning MR fluid behavior in impact applications are relatively unknown. To investigate MR fluid properties in this regime, aiming at the 'platform' recoil mitigation criterion in weapon systems, the parameterized dynamic model and mitigation control of MR damper under impact load are analyzed. These researches explore the controllable weapon recoil mitigation device and supply the gap on MR impact damping technology.Firstly, based on the high velocity condition under impact load, the parameterized dynamic models about MR damper and the mitigation system are developed. It is presented that the throttle damping item and the inertia damping item can not be ignored in such condition.Secondly, the nonlinear, hysteresis, controllable, and stable characteristics of the MR recoil mitigation system are analyzed. The structure dimension adjusting and MR fluid selecting methods are presented to improve the controllable characteristic. And these are mentioned to weaken the hysteresis that parallel connecting the excited coils and Smith compensation.Thirdly, the hyteresis caused by the current supplier is analyzed.Lastly, aiming at the 'platform' demand in weapon recoil mitigation system, six control methods are investigated, listed as double states control, more states control, optimal control, logic control, fuzzy control, and fuzzy PID control. In the same time the numerical analysises are done to estimate these methods.In conclusion, through real time feedback control the 'platform' recoil mitigation demand can be achieved using controllable MR recoil mitigation system.