基于电流变减振器的深孔机床振动模糊控制∗

摘要

Aiming at the cutting chatter problem in deep hole processing,a semi-active fuzzy control method based on electrorheological damper was put forward. A set of mixed mode electrorheological damper was de-signed and the mathematical model of the electrorheological shock absorber damping force was established. Based on the dynamic model of deep hole machine tool system,fuzzy control strategy was used for the semi-active control of cutting chatter and fuzzy control algorithm was designed. Using MATLAB/Sinmulink to simulate fuzzy control and passive control for comparison. The simulation results show that,compared with the passive control,the displacement amplitude of machine tool main vibration body vibration under the fuzzy control decreases obviously and the acceleration amplitude slightly decreased. Therefore, the damping effect of fuzzy control is better than the passive control.%针对深孔加工中的切削颤振问题，提出了一种基于电流变减振器的半主动模糊控制方法。设计了一套混合模式的电流变减振器，建立了电流变减振器阻尼力的数学模型。在深孔机床系统的动力学模型基础上，采用模糊控制策略对切削颤振进行半主动控制，设计了模糊控制算法。利用MAT-LAB/Sinmulink对模糊控制和被动控制进行仿真对比。仿真结果表明，模糊控制与被动控制相比，机床主振体振动的位移幅值明显减小，加速度幅值也略有减小。因此，模糊控制的减振效果要明显优于被动控制。