发动机磁流变悬置模糊控制研究  

Study on fuzzy-logic control of engine with magneto-rheological mounts

作　　者：陈作越[1] 杨玫[1] 王小娥[1] 王明清[1] 

机构地区：[1]乐山职业技术学院机电工程系,乐山614000

出　　处：《现代制造工程》2013年第5期73-79,共7页Modern Manufacturing Engineering

基　　金：乐山职业技术学院科学研究计划资助项目(KY2012029);乐山市重点科技计划资助项目(13GZD068)

摘　　要：在宽频范围内对发动机振动进行积极隔振,对提高汽车舒适性具有重要意义。根据设计的流动模式磁流变悬置,建立磁流变悬置简化力学模型,推导了可控阻尼力表达式。建立发动机磁流变悬置系统六自由度模型,以快速消除发动机悬置点的振动为目标,设计了模糊控制器,仿真研究了模糊控制器设计的有效性。研究结果表明:磁流变悬置较被动液压悬置具有更好的宽频隔振效果,发动机转速对应的二阶主频振动峰值明显减小,力传递率控制在20%以内,模糊控制有效隔绝了发动机振动。The vibration isolation of engine in a wide frequency region is very important to improve the fide comfort of a vehicle. A flow-mode magneto-rheological mount is proposed and applied to the vibration control of an engine. The simplified mechanics model of the magneto-rheological mount is established and its controllable damping force is derived. Furthermore, the dynamic model of an engine with magneto-rheological mounts is established and the state space control model is thus expressed. A fuzzy- logic controller is then designed to attenuate the vibration of the engine. The simulation results demonstrate the effectiveness of the fuzzy-logic controller through control responses in time and frequency domains. The amplitudes are attenuated significantly and force transmission rate is reduced to less than 20%. Therefore ,a vibration isolation of engine in wide frequency region is realized by using the proposed magneto-rheological mount and fuzzy-logic controller.

关 键 词：发动机 磁流变悬置 模糊控制 力传递率 

分 类 号：U463[机械工程—车辆工程]