【作者】 于尚平；

【导师】 高宪文；

【作者基本信息】 东北大学 ， 控制理论与控制工程， 2008， 硕士

【摘要】 本文以基于无轴传动技术的凹版包装印刷机的套印控制为课题,做高速无色差的无轴套印系统的套印控制研究。深入分析了无轴凹版包装印刷技术特点和控制要求,并针对这些分析对色差消除和同步协调控制等难题作了探索性的研究,创新性的引入偏差耦合思想来构建系统控制策略,同时通过仿真验证取得了一定的效果。无轴印刷机控制难度较大,其重要的原因是无轴印刷系统的研究是一个综合性的课题,涉及多个方面的协调控制。由于无轴印刷系统不同与传统印刷,需要综合考虑同步协调与色差消除,这就决定了其控制的复杂性。详细分析无轴印刷特点和无轴套准方式之后,选用基于相对位置的套印调整方法,并相应的将色差转化为位置轨迹作用与印辊。考虑到张力和纸张形变的影响,将检测到的色差进行优化处理,并结合印刷系统特点和伺服电机的运行方式,采用比较成熟的三角函数加减速曲线对得到的色差模型进行轨迹规划,得到平滑的位置、速度、加速度曲线,避免了系统在套准过程中产生较大的冲击和震荡。同步协调控制方面,针对无轴凹版印刷系统中各个轴之间互相制约、相互影响、耦合性的特点,引入耦合同步控制方法中偏差耦合同步控制的思想,创新性地采用多级色差耦合的偏差给定方式,并与色差消除策略相结合作为系统控制策略,提升了同步效率,并增强了系统对电气和色差扰动的抑制能力。在色差消除方面,根据控制需要选用跟踪性能较好的Backstepping控制方法和直接自适应模糊控制方法,与偏差耦合思想相结合,形成基于偏差耦合思想的Backstepping控制策略和直接自适应模糊控制策略对系统进行控制。通过仿真证明,所提策略不但能够实现多色套印系统的全局同步,而且能够有效地抑制系统参数变化和色差扰动等因素对系统性能的影响,使同步系统具有一定的鲁棒性,实现了色差调节与位置同步综合协调控制的设计目的。更多还原

【Abstract】 In the paper, the subject of Research on Gravure Package Printing’s Chromatography Control based on Shaftless Transmission Technology is selected as the thesis, which researches in shaftless system’s isochronous and coordination control with high speed. The paper analyses profoundly in the feather of shaftless gravure package printing. According to the system’s characters, the paper makes exploratory study in aberration elimination and synchronization coordination, and puts forward innovatively a new control method based on the thought of deviation-coupled control; meanwhile paper gets good results according to simulation.Design of shaftelss chromatography system is a complex topic; the main reason is that the research on shaftless printing system is a comprehensive topic, which is corcern with some aspects’coordination. As shaftelss printing system is different with traditional system, which should coordinate aberration elimination and synchronization coordination control, so it is a complex topic.The paper chooses a new registering processing method based on positioning mode with analysis in features of shaftless printing system and registering control, and it transforms the aberration into position track adding to the axes. Taking into account of the tension and printing material’s change on the impact of aberration, the paper makes the detecting aberration optimum model. According to the feather of printing system and the servo motor’s operation, the paper makes use of trigonometric function acceleration and deceleration curve to making the detecting aberration into track, then the system gets the smooth position, speed and acceleration curve, avoiding the affect of collision to the system in the calibration process.As for system of synchronization and coordination control, according to the feather of all axes’mutual constraints and interaction and strong coupling, the paper introducts the thought of deviation-coupled control in coupled synchronization control methods, and approaches innovatively multi-grade coupling aberration as aberration given. And then, the paper combinates the given and aberration elimination strategy as the system’s strategy, which enhances the efficiency of synchronization and strengthens the ability of inhibition to electrical disturbances and aberration changes. In the aspect of aberration processing, the paper uses the control methods having good performance of tracking control-Backstepping control and Directive adaptive-fuzzy control, then combines them to the thought of deviation-coupled control. It formats the strategy that is Backstepping control and Directive adaptive-fuzzy control based on the the thought of deviation-coupled control. Through simulation proving, it can not only realize the global synchronization but also inhibits the disturbance of load and parameters change on the whole synchronization system. And the designes controller makes the system owns the character of robust, which realizes integrated design object of aberration registering and synchronization control at meantime.更多还原