基于磁致伸缩致动器的车削振动控制系统研究

Study of cutting vibration control system based on the magnetostrictive actuator

磁致动器具有体积小、可靠性高、驱动力大、响应速度快等优点,但其动特性具有明显的滞回非线性特点,同时考虑车削过程外干扰的不确定性,本文研究设计了基于磁致动器的车削振动主动控制系统,采用了变步长自适应控制算法策略。在Matlab/Simulink中对控制系统进行了模拟仿真。在此基础上,基于dSPACE快速原型控制系统搭建了车削振动控制模拟实验台,以激振器作为外干扰进行振动抑制实验。实验结果表明,所设计的振动控制系统对模拟刀架的振动有明显的抑制效果。

Magnetostrictive actuator has the advantages of small volume, stable performance, high reliability, large driving force, fast response speed, etc, but its dynamic characteristics have obvious hysteresis nonlinear characteristic, taking uncertainty of outside interference in the turn- ing process into account. The active vibration control system of turning tool based on the magnet- ic actuator are studied and designed, and the variable step size strategy of adaptive control algo- rithm is adopted in this paper. A control system simulation in Matlab/Simulink is conducted, on the basis of which, the turning vibration control simulation platform based on dSPACE in experi- mental verification under the exciter as outside interference has been set. The experimental re- sults show that this design of active vibration control system based on magnetic actuator for simu- lation tool post vibration suppression effect is obvious.