横纵激励下几何非线性复合材料层合梁的混沌同步

本文基于里兹-伽辽金法,将考虑几何非线性的一端固支一端夹支复合材料层合梁的控制方程简化为典型的Duffing方程;引入了Duffing-Van Der Pol系统,通过两种系统的分岔图说明了它们共同达到混沌时的参数值;通过广义投影同步法,实现了Duffing系统和Duffing-Van Der Pol系统的精确同步,得到了实现两种系统同步的控制器;分别将两种系统通过Matlab进行了数值仿真,得到了两种系统的同步误差曲线图、二维相图和三维相图,从而验证了混沌同步的准确性。     

Development of Parallel Coupling System between Three-Dimensional Nodal Kinetic Code ENTREE and Two-Fluid Plant Simulator TRAC/BF1

The high-speed three-dimensional neutron kinetic code ENTRÉE was developed based on the polynomial and semi-analytical nonlinear iterative nodal methods (PNLM and SANLM) with also introducing the discontinuity factor. In order to enhance the efficiency of transient calculation, the nonlinear correction-coupling coefficients are intermittently updated based on the changing rate of core state variables. By giving the analytical form for two-node problem matrix elements, the additional computing time in SANLM was minimized. A fast algorithm was developed for the multi table macro-cross section rebuilding process. The reactivity component model was implemented based on the variation of the neutron production and destruction terms. The code was coupled with the two-fluid thermal hydraulic plant simulator TRAC/BF1 through PVM or MPI protocols. Two codes are executed in parallel with exchanging the feedback parameters explicitly. Based on the LMW PWR transient benchmark, it was shown that both PNLM and SANLM spend less than 20% excess computing time in comparison with the coarse mesh finite difference method (CFDM). The implementation of the discontinuity factor was verified based on the DVP problem. Adequacy and parallel efficiency of the coupling system TRAC/BF1-ENTREE was demonstrated based on the BWR cold water injection transient proposed by NEA/CRP.     

基于DVP-20EX PLC的钣金喷涂自动流水线的设计

喷涂工艺是饭金加工工艺流程中的重要一环,其自动化水平及控制精度决定了饭金件在加工过程中表面处理的质量好坏,运用台达DVP-20EX PLC、TPC7062KS触摸屏及台达VFD037M43A变频器等组成的中小型镀锌板工件钣金喷涂自动流水线,对其从硬件和软件两个方面进行了完整的设计.安装调试完成后经数月的运行表明:该系统...     

台达自动化产品在多功能旋压机的应用

本文主要论述台达变频器、PLC、HMI产品在多功能旋压机控制系统的应用原理,在该系统中,变频器驱动主轴电机的旋转;PLC以RS-485通讯方式调节主轴（变频器）的转速,PLC模拟量扩展模块用于控制液压缸的压力和流量,编码器获取左侧液压缸以及右侧液压缸的当前位置信号,HMI监控旋压机的运行状态以及警报信息,展示了台达自动...     

DVP-9000微机保护综合自动化系统在供电系统的应用

随着科学技术的不断发展,变电站综合自动化系统取代传统的变电站二次继电保护系统已经成为电力系统的发展趋势。本文就变电站DVP-9000微机保护综合自动化系统概念、原理以及在工业项目中的应用进行了阐述。     

DVP14ES00T在螺纹钢定长裁剪同步改造中的应用

本文介绍了通过台达PLC DVP14ES00T作为现场控制设备,利用台达DOPB07S触摸屏作为监控和输入设备,实现了老式螺纹钢牵引切割设备的同步和自动化改造,提高了生产的精度与速度。