基于位移迭代的伺服电缸压力控制模型  

Pressure control model for servo electric cylinder based on displacement iteration

作　　者：高琳琪 张乔 徐嘉梁 万强 黄国燕 毛容 Gao Linqi;Zhang Qiao;Xu Jialiang;Wan Qiang;Huang Guoyan;Mao Rong(Sichuan Aerospace South Sichuan Initiating Explosive Technology Co.,Ltd.,Luzhou 646099,China)

机构地区：[1]四川航天川南火工技术有限公司,四川泸州646099

出　　处：《锻压技术》2023年第4期199-203,共5页Forging & Stamping Technology

摘　　要：为了解决传统伺服电缸压力机在扭矩模式下控制精度受系统阻尼影响,不适用于大量程的压力控制的问题,设计了一套伺服电缸压力机系统,采用基于位移迭代的压力控制模型,利用被压工件材料的压力与变形之间的本构关系,通过调整电缸输出位移,控制被压工件的变形量,实现基于位移迭代的压力控制,从而克服了系统阻尼对控制精度的影响,使伺服电缸压力控制精度高于±0.6%,且压力越大,控制精度越高。研究成果使得普通电缸也能够满足大量程、高精度压力控制的需求,大幅降低了伺服电缸压力机系统的制造成本。In order to solve the problem that the control accuracy of traditional servo electric cylinder press in torque mode was affected by system damping and was not suitable for large range pressure control,a set of servo electric cylinder press system was designed and manufactured.Then,the pressure control model based on displacement iteration and the constitutive relationship between the pressure and deformation of the pressed workpiece material,the deformation amount of the pressed workpiece was controlled by adjusting the output displacement of electric cylinder to realize the pressure control based on displacement iteration.Thus,the influence of system damping on the control accuracy was overcome,the pressure control accuracy of the servo electric cylinder was higher than±0.6%,and the greater the pressure was,the higher the control accuracy was.The research results make that the ordinary electric cylinder can meet the needs of large range and high-precision pressure control and greatly reduce the manufacturing cost of the servo electric cylinder press system.

关 键 词：伺服电缸 压力控制 位移迭代 材料本构 系统阻尼 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]