小型油气支承油气弹簧单元控制策略设计  

The Control Strategy Design of Hydro-Pneumatic Spring Module of Minitype Oil-Air Support System

作　　者：侯京锋[1] 郝岩研[1] 芮鹏 石航[1] HOU Jing-feng;HAO Yan-yan;RUI Peng;SHI Hang(Beijing Institute of Structure and Environment Engineering,Beijing 100076,China)

机构地区：[1]北京强度环境研究所,北京100076

出　　处：《强度与环境》2021年第3期59-64,共6页Structure & Environment Engineering

摘　　要：油气弹簧单元为油气支承系统内一核心子单元,本文在梳理利用油气支承进行全箭模态试验自由边界模拟基本流程的基础上,设计系统控制流程,实现压力控制到位移控制的自动切换,针对油气弹簧单元的小阻尼大时滞特点,从积分和微分的角度改良PID算法,从机理上分析油气弹簧单元与常规液压缸的差异,设计修正算法。实测表明,控制流程设计合理,控制模式转换瞬间位移过冲较小,活塞位控上升及保持过程平稳,满足模态试验边界模拟要求。Hydro-pneumatic spring is kernel sub-module of oil-air support system.Based on the analysis of the modal test process with oil-air support system which simulate free boundary,the control sequence is designed,the control mode switching technology is applied.According to the large time-delay characteristics of hydro-pneumatic spring,traditional PID is improved in integral and differential processes.The principle difference between hydro-pneumatic spring and typical hydraulic cylinder are analyzed,the correction algorithm is designed.The field testing shows that the control process are reasonable,the position overshooting does not appear in a moment of control mode switching,the control effect of the piston displacement is stationary.In conclusion,the control strategy meet the requirement of simulate free boundary for modal test.

关 键 词：油气支承 油气弹簧 控制流程 修正算法 

分 类 号：V416[航空宇航科学与技术—航空宇航推进理论与工程]