【摘要】 针对由颤振预测控制策略指导的稳定切削控制方法实时动态调整能力差的缺点,综合颤振预报、预测理论,进行了稳定性在线寻优控制理论及方法的研究。基于刀具—工件系统铣削再生颤振动力学模型,研究了考虑系统结构参数(刀具、工件装夹刚度)和加工参数(切削加工参数优化选择)的切削稳定性评价方法,提出了以扩大稳定性区域和稳定最大材料切除率为控制目标的机床稳定性控制方法。形成了以"预报—控制—效果评估—再控制"为步骤的在线监测、智能诊断和实时控制的集成一体化策略。设计并实施了稳定性控制理论验证实验,获得了与理论分析一致的结论。更多还原

【Abstract】 As the reason of bad performance in real-time machining stability control based on the theory of chatter stability forecast,the theory and method in online optimization control combined chatter alarm and stability forecast are studied.Based on the dynamic model of regenerative chatter in tool-workpiece system,the structure parameters(clamping rigidity of tool and workpiece) and machining parameters(optimization chosen of machining parameters) are considered to evaluate machining stability,the machine stability control methods by enlarge stability zone and chatter free max material remove rate are proposed.The "forecast-control-evaluation-further control" online detecting,intelligent diagnosis and real-time control integrate strategies are formed.The stability theory validation experiments are setup,and the results show high accuracy to make sure the high efficiency in stability milling.更多还原