磁流变冲击后坐控制系统试验研究  

Experiments on magneto-rheological recoil control system

作　　者：张莉洁[1] 常家东[1] 王炅[2] 程广伟[1] 

机构地区：[1]洛阳理工学院机械工程系,河南洛阳471023 [2]南京理工大学机械工程学院,南京210094

出　　处：《振动与冲击》2014年第22期115-120,共6页Journal of Vibration and Shock

基　　金：国家自然科学基金资助项目(50675106);国家自然科学基金(51175265)

摘　　要：针对磁流变阻尼器用于火炮后坐缓冲时对响应时间的严苛要求,对磁流变冲击后坐控制系统进行冲击试验研究。对设计的磁流变阻尼器进行固定电流下冲击特性试验,获得输出阻力模型。对阻尼器线圈电流及输出阻力响应时间分别进行试验测试,提出磁流变冲击后坐轨迹跟踪控制系统方案,期望可控阻力能准确跟踪理想阻力曲线。通过用固定曲线无反馈控制及双闭环反馈控制对磁流变后坐控制系统进行3 g、4 g药量冲击试验结果比较知,采用反馈控制能显著减小磁流变后坐阻力响应时间,获得快速跟踪性能,后坐阻力充满度更好。后坐位移相同时可减小后坐阻力峰值;后坐阻力峰值相同时可显著减小后坐位移。由4g药量中后坐阻力曲线下滑结果分析知,阻尼力可调系数作为重要特性参数在进行磁流变阻尼器结构设计时必须足够大。Since the critical demand for time response of MR damper in gun recoil buffering applications, experimental studies on MR recoil control system were carried out on an impact test rig with the special designed MR damper.The impact performance of the MR damper described by a physical model under fixed operating current was obtained.The time responses of the MR damper＇s coil current and the damping force were respectively tested,then a trajectory tracking control scheme for MR recoil system was put forward,so that the adjustable damping force of MR can accurately track an ideal reference curve.Experimental results with 3g and 4g powders under the double close-looped feedback control as well as the fixed damping curve control without feedback were obtained.By comparisons,it is shown that 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.Analyzing the decline of the damping force curve with 4g powders,it’s suggested the adjustable coefficient of the damping force,as an important parameter,must be large enough in MR dampers’structural design.

关 键 词：磁流变阻尼器 冲击载荷 反后坐装置 响应时间 轨迹跟踪系统 

分 类 号：TH113.1[机械工程—机械设计及理论]