The real-time functional test facility for advanced instrumentationand control in nuclear power plants

Testing and validation of the functions and performance of the digital instrumentation and control (I&C) system should be done prior to installation in nuclear power plants. The objective of the I&C Functional Test Facility (FTF) is to test and validate the functions of developed digital control and various monitoring systems. The FTF provides the simulated testing environment as an experimental test bed. The FTF software consists of a mathematical modeling program which simulates a three-loop 993 MWe pressurized water reactor and a supervisory program that comprises all the instructions necessary to run the FTF. The hardware equipment provides an interface between a host computer and a simple test panel or the developed target systems to be tested. The graphical user interface supports an easy and friendly interface between the FTF and users. It is implemented through a Picasso-3 graphic tool developed by the Halden Reactor Project. The FTF is applied to an advanced I&C system prototype, such as an automatic start-up intelligent control system, dynamic alarm system, accident identification system, and intelligent logic tracking system, to test its algorithm or performance. The results of the test show good operational performance of the FTF in normal and transient conditions     

神经元自适应 PID 控制器的研究

利用神经元的自学习功能构成了自适应ＰＩＤ控制器；分析了神经元自适应控制系统的稳定性和学习算法的收敛性，并给出仿真结果     

螺管电磁阀高速开关动特性的改进方法

本文讨论并分析了影响螺管电磁阀动态特性的机械结构因素,提出了一种改进机械结构及改善电磁阀动态特性的方法,并介绍了工程应用实例。     

汽车主动悬架免疫模糊控制策略研究

针对汽车四分之一主动悬架模型,提出免疫模糊控制策略.该策略兼有模糊控制的快速简单和免疫控制的全局搜索最优解的优点,并可同时考虑车身垂直加速度、悬架动行程和轮胎动载等多种因素.结果表明,与独立的免疫控制和模糊控制比较,该免疫模糊控制策略的综合性能最优.     

应用软件之间数据交互方法的研究与应用

介绍实现软件通讯的几种主要实现方法,着重分析ActiveX和LabVIEW共享变量各自的特点,通讯的设置、数据传输和编程方法。通过应用实例研究了LabVIEW和工业组态软件通讯的数据同步性。实践证明,在工业控制系统中,通过应用程序的数据交互,将LabVIEW优秀的数据处理能力、丰富的函数库与工业业组态软件灵活的人机界面组态功能结合起来,不仅实现了复杂系统的控制,而且极大地方便了程序的编写和维护,提高了程序的开发效率。     

对切削提升系统的改造

本文对切削机的液压传动控制过程进行分析,对切削机存在的问题提出了改进措施。     

齿轮啮合沿齿面油膜厚度的分布

总结了齿轮啮合时油膜厚度分析计算的方法,并对一般机械工业中重合度ε＞1,即存在两齿啮合的普遍情况的油膜厚度进行了分析计算,得到了齿轮传动沿啮合线的油膜压力、油膜形状,为齿轮传动的失效分析和摩擦学设计提供分析计算基础.     

钢渣的综合利用

钢渣是炼钢工业的副产品。细述了钢渣的理化特性,并介绍钢渣在筑路、烧结矿、水泥、建材和农业等领域的综合利用。     

Modeling for Predicting Flow Stress of Al-14Cu-7Ce Alloy at Elevated Temperature

在应变速率0.001~1 s-1、温度573~823 K的条件下,采用Gleeble 3500热模拟试验机对Al-14Cu-7Ce合金进行等温热压缩实验,并根据真应力-真应变的计算数值,建立了Al-14Cu-7Ce合金高温流变应力本构方程。结果表明,流变应力符合速率方程€=ADLGb/kT(sinhaLG)n;其中,应变的影响通过多项式拟合方式耦合进入材料常数A,αL和n。所建立的本构方程能够准确预测Al-14Cu-7Ce合金高温流变应力,实验条件下控制合金热变形的主要机制是位错攀移。     

A study of job shop standard setup time quota

For the multi-item and small lot size production mode and single machine job shop scheduling sequence independent setup time, many setup times are difficult to estimate accurately, which influences the ability to achieve accurate production cycles and costs of products. The survey shows that the length of the setup time depends on the level of employee’s knowledge. Therefore, a method for determining the standard setup time quota based on the level of employees’ knowledge is proposed. First, an evaluation index system for the level of employee’s knowledge is built; the level of employee’s knowledge is estimated by the masses and experts fuzzy comprehension evaluation and entropy method. Second, the range and definition of the level of employees’ knowledge index are developed. Third, the relational model of the employee’s knowledge level and the level of employees’ knowledge index is constructed through the least squares method. Finally, an example application is presented to verify the feasibility and effectiveness of the proposed model.