针对煤矿掘进装备截割臂由工作载荷引起的剧烈振动问题,提出一种变阻尼动力吸振器半主动振动控制方法。根据带耗散函数的拉格朗日动力学方程建立了截割臂-动力吸振器耦合动力学模型;根据动力学模型通过定点理论和迭代计算的方法分别计算了被动式动力吸振器和半主动动力吸振器的各项物理参数;设计了动力吸振器的标准地棚控制和开关地棚控制策略,实现了动力吸振器的半主动控制。仿真结果对比表明:动力吸振器标准地棚控制能够有效地降低截割臂的振动强度,显著降低了截割臂一阶模态角度响应与角加速度响应的峰值,具有最佳的控制效果。

 A semi-active vibration control method using a variable damping dynamic absorber was proposed toaddress the severe vibration problem caused by the working load on the cutting arm of coal mine excavationequipment. A coupled dynamic model of cutting arm dynamic absorber was established based on the Lagrangiandynamic equation with dissipation function. According to the dynamic model, the physical parameters of passiveand semi-active dynamic absorbers were calculated using fixed-point theory and iterative calculation methods.Standard ground control and switch ground control strategies were designed for the power absorber, achieving semi-active control of the power absorber. The comparison of simulation results showed that the standard ground shedcontrol of the dynamic absorber could effectively reduce the vibration intensity of the cutting arm, significantlyreduce the peak values of the first-order modal angle response and angular acceleration response of the cutting arm,and have the best control effect.