The stretching process,as a key phase of web production system,pursues the target velocities of rollers and the web tensions of spans between the successive rollers to guarantee proper stretching ratios. This requires...The stretching process,as a key phase of web production system,pursues the target velocities of rollers and the web tensions of spans between the successive rollers to guarantee proper stretching ratios. This requires the stable velocities and velocity ratios of large number rollers separated throughout the workshop. To this goal,a distributed cooperative controller is designed to coordinate the velocities of the rollers to the desired values as well as the target ratios between the upper and lower rollers. During the whole evolution,only the neighbor rollers can exchange the working information,and neither global information nor central controller is required. It is proven that all the rollers asymptotically achieve the desired velocity ratios via the proposed control law,which is also demonstrated by numerical simulation.展开更多
针对拉幅系统张力和摆臂位置的波动、超调和响应特性较差的问题,通过模糊PID控制算法实现拉幅张力和针板链条张力稳定以及摆臂网边的高跟随精度。结果表明,模糊PID控制算法可有效改善拉幅系统的动态特性。拉幅张力的超调量小于0.5 k N,...针对拉幅系统张力和摆臂位置的波动、超调和响应特性较差的问题,通过模糊PID控制算法实现拉幅张力和针板链条张力稳定以及摆臂网边的高跟随精度。结果表明,模糊PID控制算法可有效改善拉幅系统的动态特性。拉幅张力的超调量小于0.5 k N,调整时间由11.9 s降到6.8 s,拉幅张力稳定在(87±1)k N;针板链条张力受到干扰后能够在不产生超调的前提下仅需2 s就能回到稳定状态;摆臂位置跟随系统也不会产生超调且能快速响应。运用模糊PID控制算法降低了张力与摆臂位置的波动和超调量,提高了热定型拉幅系统动态响应和稳态特性。展开更多
基金National Natural Science Foundations of China(Nos.61203073,61134009)Specialized Research Fund for the Doctoral Program of Higher Education of China(No.20120075120008)+2 种基金Foundation of Key Laboratory of System Control and Information Processing,Ministry of Education,China(No.SCIP2012002)Program for Changjiang Scholars and Innovation Research Team in University from the Ministry of Education,China(No.IRT1220)Specialized Research Fund for Shanghai Leading Talents,Project of the Shanghai Committee of Science and Technology(No.13JC1407500)
文摘The stretching process,as a key phase of web production system,pursues the target velocities of rollers and the web tensions of spans between the successive rollers to guarantee proper stretching ratios. This requires the stable velocities and velocity ratios of large number rollers separated throughout the workshop. To this goal,a distributed cooperative controller is designed to coordinate the velocities of the rollers to the desired values as well as the target ratios between the upper and lower rollers. During the whole evolution,only the neighbor rollers can exchange the working information,and neither global information nor central controller is required. It is proven that all the rollers asymptotically achieve the desired velocity ratios via the proposed control law,which is also demonstrated by numerical simulation.
