基于模糊自抗扰的镜像加工稳定支撑控制

针对大型薄壁零件镜像加工过程中的稳定支撑问题,提出了基于模糊自抗扰的力/位混合控制策略。通过支撑-工件系统模态锤击实验,分析了磁流变集成支撑装置线圈中电流变化对系统模态参数的影响。设计了支撑侧基于模糊线性自抗扰控制(FLADRC)的力/位混合柔顺控制策略,通过MATLAB/Simulink仿真实验平台建立了系统控制模型并进行了仿真分析。仿真结果表明,相较于传统PID控制,FLADRC对目标函数跟踪速度快、误差小,鲁棒性与自适应能力强。通过薄壁件镜像铣削实验验证所设计控制策略的有效性。研究结果表明,该控制策略可有效维持工件加工时支撑侧的稳定支撑。

Stable-Support Control of Mirror Processing Based on Fuzzy ADRC

In view of the stable-support problem during mirror processing of large thin-walled parts,a hybrid position/force control strategy based on fuzzy active disturbance rejection is proposed.The influence of current change in the coil of the magnetorheological integrated support device on the modal parameters of the system is analyzed through the modal hammering experiment of the support-workpiece system.A hybrid position/force compliance control strategy based on the fuzzy linear active disturbance rejection control(FLADRC)method was designed,and the system control model was established in MATLAB/Simulink in which simulation analysis was carried out.Results show that,compared with the traditional PID controller,FLADRC tracks the target function faster,having less error,and has excellent robustness and adaptive ability.The effectiveness of the designed control strategy was validated through the experiment of mirror processing of thin-walled parts,and the results show that the control strategy can effectively maintain stable support of the supporting-side during the workpiece milling process.