磁流变辅助支撑铣削系统动力学仿真

Dynamic Simulation of Magnetorheological Assisted Support Milling System

摘要: 本文针对磁流变辅助支撑铣削系统，从建立基于磁流变效应的铣削系统动力学模型入手，结合磁流变液稳态流动测试结果，分析模型中磁流变液辅助支撑单元刚度、阻尼与电流的变化规律，推导系统的铣削动力学微分方程；并利用Matlab软件中Simulink模块对建立的模型进行动力学仿真，分别在直流、正弦波、三角波和方波电流作用下求解得系统的加速度响应，并对结果进行时域分析。结果表明，在2 A方波电流作用下，系统的加速度幅值最小，且此时系统的固有频率最大，能够显著增加工件在铣削过程中的刚度以提高其加工精度。

Abstract: This article focuses on the magnetorheological fluid-assisted support milling system, starting with the establishment of a milling system dynamics model based on the magnetorheological effect. Combined with the steady-state flow test results of magnetorheological fluid, the changes in stiff-ness, damping, and current of the magnetorheological fluid-assisted support unit in the model are analyzed, and the milling dynamics differential equation of the system is derived; And use the Sim-ulink module in Matlab software to conduct dynamic simulation on the established model, obtain the acceleration response of the system under the action of DC, sine wave, triangular wave, and square wave currents, and analyze the results in time domains. The results show that under the ac-tion of a 2 A square wave current, the acceleration amplitude of the system is the smallest, and the natural frequency of the system is the largest at this time, which can significantly increase the stiff-ness of the workpiece during the milling process to improve its machining accuracy.