大型模锻液压机极低速运行泄漏补偿  

Leakage Compensation for Large Die Forging Press under Ultra-low Velocity

作　　者：黄明辉[1] 宋文举[1] 李毅波[1] 潘晴[1] 

机构地区：[1]中南大学高性能复杂制造国家重点实验室,长沙410083

出　　处：《中国机械工程》2014年第20期2769-2774,共6页China Mechanical Engineering

基　　金：国家自然科学基金资助项目(51005251);国家重点基础研究发展计划("973"计划)资助项目(2011CB706802);金属挤压/锻造装备技术国家重点实验室开放基金资助项目;湖南省博士生科研创新项目

摘　　要：针对等温锻造中模锻液压机低速运行时液压系统泄漏影响模锻液压机稳定性的问题,运用AMESim和MATLAB/Simulink软件建立了考虑系统泄漏模型的模锻液压机极低速驱动液压控制系统的联合仿真模型,并通过实验验证了该仿真平台的有效性与精确性。分析了系统泄漏对低速性能的影响,提出了常规PID泄漏补偿控制方法和基于PID的复合泄漏补偿控制方法,并对两种方法的补偿效果作了比较。仿真结果表明基于PID的复合泄漏补偿控制方法效果更好,超调量降低至3.4%,最大系统稳态误差减小至0.686%。Leakage of hydraulic system will affect the stability of die forging press under ultra-low velocity in the isothermal forging process.Aiming at this problem,the co-simulation model considering the leakage of the system and hydraulic control system of the die forging press under ultra-low velocity was established based on the AMESim and Matlab/Simulink software platform.And the availability and accuracy of the simulation model was proven by experiments.The effects of leakage on the ultralow velocity performance of the system were analyzed,and then the conventional PID leakage compensation control method and the compound compensation control strategy based on PID were proposed.And the validity of the two kind of methods of compensation was investigated.Simulation results show that the compound compensation control method based on PID is better than the conventional PID leakage compensation control scheme,the overshoot is reduced to 3.4%,and the maximum steady？state error of the system is decreased to 0.686%.

关 键 词：模锻压机 等温锻造 泄漏补偿 极低速系统 

分 类 号：TG315.4[金属学及工艺—金属压力加工] TP273[自动化与计算机技术—检测技术与自动化装置]