燕山大学学报2018，Vol.42Issue(2)：177-182,6.DOI:10.3969/j.issn.1007-791X.2018.02.012
具有死区输入的HXD2型机车制动缸自适应补偿控制
Adaptive compensation control of brake cylinder on HXD2-type electric locomotive with dead zone input
摘要
Abstract
For the study of position control precision of brake cylinder in HXD2electronic locomotives,including piston rod and brake shoe,which was extruded by pressure from auxiliary air cylinder and radial deformation of wheelset while braking,a nonlinear mathematical model of brake cylinder with dead zone input was established after considering dead zone nonlinearity of valve port in reversing valve,uncertain disturbance from interaction among brake shoe,piston rod and wheelset and the pressure leakage caused by negatively strict coordination between piston and inner cylinder wall.Nussbaum-type function was brought in to deal with uncertain shifting direction of the spool in reversing valve.Virtual feedback control was introduced to improve the convergence of error surface.According to the Lyapunov stability theory,adaptive compensation controller with Nussbaum function was constructed with the merit of its fast convergence and less parameters to be matched.Theoretical analyses and simulation results demonstrate that the brake cylinder servo system has closed loop bounded output with its tracking error bearing semi-globally uniform bound and convergence to 0.The error surface has abated its dynamic buffeting with fast constringency;control variables and Nussbaum-type function is smoothly constricted with bound.The dead zone servo system, which is able to effectively overcome dead zone nonlinearity,is robust to external unknown time-varying interference and parameter drifting with ideal output response.关键词
死区非线性/阀芯游移/Nussbaum类型函数/虚拟反馈控制/自适应补偿控制Key words
dead zone nonlinearity/spool wander/Nussbaum-type function/virtual feedback control/adaptive compensation control分类
信息技术与安全科学引用本文复制引用
刘芳璇,谢程程,王桂荣..具有死区输入的HXD2型机车制动缸自适应补偿控制[J].燕山大学学报,2018,42(2):177-182,6.基金项目
国家自然科学基金资助项目(61640314) （61640314）
浙江省自然科学基金资助项目(LY15F030012) （LY15F030012）
