变量飞轮脉动激振液压振动系统的建模与仿真

摘要

A hydro-vibration system assisted by variable inertia flywheel pulsation was put for-ward.An ordinary hydro-vibration circuit was coupled with an assistant circuit consisting of a variable inertia flywheel,a hydro-motor and a hydro-bridge.The flywheel produced a pulsating rotation by means of its moment inertia change and rectification with bridge,a momentum circulation between the flywheel and the vibrator was thus brought about to boost vibration.The mathematical model of the system was built,and the energy efficiency analyses for the momentum cycle were carried out.Theo-retical analyses and MATLAB simulation show that the vibration performance is related to the fre-quency characteristics of the system and the dynamics of the flywheel.By rational choice of mechanical parameters and control modes of the loop,the obvious vibration and energy saving effect can be ob-tained.%提出了一种变量飞轮辅助液压激振方案，即采用变量飞轮液压马达液桥辅振回路与液压激振主回路动力耦合，利用飞轮转动惯量变化和液桥的整流作用使飞轮脉动旋转，进而在飞轮和振体之间形成动量循环，强化振动。构建了系统数学模型并进行了仿真和动量循环能效分析。理论分析和MATLAB 仿真表明，变量飞轮激振效果与系统频率特性和飞轮动力学特性有关，合理选择回路力学参数和控制方式可获得明显的激振与节能效果。