This paper bursts the bondage of conventional no-burn thought, presents an optimum strategy permitting burn appear in grinding roughing stage, but the burning layer can be summed on the following finishing stage. On t...This paper bursts the bondage of conventional no-burn thought, presents an optimum strategy permitting burn appear in grinding roughing stage, but the burning layer can be summed on the following finishing stage. On the base of the basic grinding models, the objective function and constrained functions for the multiparameter optimum grinding models had been built in this paper. By the computer simulation, the nonlinear optimum grinding control parameters had been obtained, and the truth grinding process had been controlled by these parameters. The results of simulation and the experiments proved the exactitude of the optimum models and the feasibility of the optimum strategy. This paper had also created the precondition for the grinding automation, virtual grinding and intelligent grinding system for cylindrical grinding process.展开更多
随着自由曲面光学元件加工需求日益增长,能短周期高柔性智能化成线的超精密磨削、抛光设备及工艺成为光学元件批量生产的关键。传统超精密磨削机床设计周期长、制造及投入成本高,难以满足中小批量定制的多样化市场应用。基于大工作空间...随着自由曲面光学元件加工需求日益增长,能短周期高柔性智能化成线的超精密磨削、抛光设备及工艺成为光学元件批量生产的关键。传统超精密磨削机床设计周期长、制造及投入成本高,难以满足中小批量定制的多样化市场应用。基于大工作空间、低成本且智能化、柔性化的六轴工业机器人,提出了机器人主动柔顺力控磨削方法,探究机器人力控磨削作业的运动控制,研究力控法兰特性从而掌握力控控制策略;基于力控磨削工艺实验求解建立稳定磨削力模型,实现通过控制力控期望力来实现机器人恒定磨削深度,粗磨阶段有效提升工件面形质量,相较于机器人无力控磨削,机器人力控磨削峰谷值(peak-to-valley,PV)提升了57.8%,均方根值(root mean square,RMS)提升了63.5%。展开更多
工业过程运行控制的目的是实现反映过程整体运行性能的工艺指标.将常规解耦内模控制(Internal model control,IMC)进行推广,提出了优化过程运行的解耦IMC方法.通过对广义解耦内模控制器的设计获得了具有高维解耦能力、鲁棒稳定性和抗干...工业过程运行控制的目的是实现反映过程整体运行性能的工艺指标.将常规解耦内模控制(Internal model control,IMC)进行推广,提出了优化过程运行的解耦IMC方法.通过对广义解耦内模控制器的设计获得了具有高维解耦能力、鲁棒稳定性和抗干扰能力强的回路设定模型.该模型能够响应系统的各种不确定性和干扰,对回路设定值进行调整,通过控制回路的输出跟踪凋整后的设定值,从而实现期望的工艺指标.磨矿回路运行的解耦IMC设计实例及仿真验证了所提方法的有效性.展开更多
文摘This paper bursts the bondage of conventional no-burn thought, presents an optimum strategy permitting burn appear in grinding roughing stage, but the burning layer can be summed on the following finishing stage. On the base of the basic grinding models, the objective function and constrained functions for the multiparameter optimum grinding models had been built in this paper. By the computer simulation, the nonlinear optimum grinding control parameters had been obtained, and the truth grinding process had been controlled by these parameters. The results of simulation and the experiments proved the exactitude of the optimum models and the feasibility of the optimum strategy. This paper had also created the precondition for the grinding automation, virtual grinding and intelligent grinding system for cylindrical grinding process.
文摘随着自由曲面光学元件加工需求日益增长,能短周期高柔性智能化成线的超精密磨削、抛光设备及工艺成为光学元件批量生产的关键。传统超精密磨削机床设计周期长、制造及投入成本高,难以满足中小批量定制的多样化市场应用。基于大工作空间、低成本且智能化、柔性化的六轴工业机器人,提出了机器人主动柔顺力控磨削方法,探究机器人力控磨削作业的运动控制,研究力控法兰特性从而掌握力控控制策略;基于力控磨削工艺实验求解建立稳定磨削力模型,实现通过控制力控期望力来实现机器人恒定磨削深度,粗磨阶段有效提升工件面形质量,相较于机器人无力控磨削,机器人力控磨削峰谷值(peak-to-valley,PV)提升了57.8%,均方根值(root mean square,RMS)提升了63.5%。
文摘工业过程运行控制的目的是实现反映过程整体运行性能的工艺指标.将常规解耦内模控制(Internal model control,IMC)进行推广,提出了优化过程运行的解耦IMC方法.通过对广义解耦内模控制器的设计获得了具有高维解耦能力、鲁棒稳定性和抗干扰能力强的回路设定模型.该模型能够响应系统的各种不确定性和干扰,对回路设定值进行调整,通过控制回路的输出跟踪凋整后的设定值,从而实现期望的工艺指标.磨矿回路运行的解耦IMC设计实例及仿真验证了所提方法的有效性.
