连续气举采油最大产量的优化计算法

根据节点系统分析原理和最优多相流相关式,讨论了利用计算机对连续气举采油时的最大产量进行优化运算的方法,得到了满意的结果。     

POLLING方式RTU装置接入SCADA系统的技术研究

论述了POLLING方式RTU接入国内开发的SCADA系统的技术原理、方法及结构配置、功能。并通过省调SCADA系统接收μ4F、N4F型RTU的实例,较详细地介绍了POLLING方式RTU严格按部颁通讯规约接入SCADA系统的程序设计流程、主要程序模块及各程序包的功能和使用说明。     

Dynamic hybrid simulation of batch processes driven by a scheduling module

Simulation is now a CAPE tool widely used by practicing engineers for process design and control. In particular, it allows various offline analyses to improve system performance such as productivity, energy efficiency, waste reduction, etc. In this framework, we have developed the dynamic hybrid simulation environment PrODHyS whose particularity is to provide general and reusable object-oriented components dedicated to the modeling of devices and operations found in chemical processes. Unlike continuous processes, the dynamic simulation of batch processes requires the execution of control recipes to achieve a set of production orders. For these reasons, PrODHyS is coupled to a scheduling module (ProSched) based on a MILP mathematical model in order to initialize various operational parameters and to ensure a proper completion of the simulation. This paper focuses on the procedure used to generate the simulation model corresponding to the realization of a scenario described through a particular scheduling.     

Development of refinery scheduling system using mixed integer programming and expert system

This paper presents a hybrid refinery scheduling system combining mathematical programming model and expert system. Mixed-integer linear programming models for crude oil movement between units are merged into the expert system that is for qualitative issues concerning crude vessel unloading operations. The target problem ranging from the crude unloading to the crude charging to distillation towers is decomposed into several module problems for efficiency. Compared with existing scheduling approaches for oil movement, the proposed hybrid refinery scheduling system is very effective in dealing with timing decisions involving vessel unloading operations due to the advantages of an expert system. Since the proposed scheduling system can generate solutions so fast, it is expected to play a key role in the real processes. This paper is dedicated to Professor Wha Young Lee on the occasion of his retirement from Seoul National University.     

薄壁零件绿色加工技术的研究

详细讨论了薄壁零件的绿色加工技术.针对薄壁零件刚性差、加工工艺性差、易发生加工变形和切削振动等情况,采用了高速加工技术,改变了工件的装夹方式,优化了编程策略,选择了合适的切削刀具,采用了最佳的切削工艺,实现了薄壁零件的高速切削.这种加工技术生产效率高,加工表面质量好,环境污染小,符合现代绿色加工的发展趋势.     

基于S3C2440的多路高精度数据采集系统设计

介绍了一种以ARM9微控制器为核心的多路数据采集系统。该系统的硬件部分采用SAMSUNG公司的S3C2440A微控制器,以及TI公司24Bit精度的ADS1271A/D转换芯片。软件部分采用了Linux作为嵌入式操作系统,在此基础上选用图形化编程语言Qt完成应用程序的设计。系统实现了最高采样率为每秒50000采样点,18Bit分辨率的4通道数据实时采集,可以满足目前绝大多数应用场合的需求。     

基于混合遗传算法的操作臂最优路径规划

提出了一种将小生境遗传算法与SWIFT算法相结合的混合遗传算法,用于冗余度操作臂的最优路径规划。针对目标物体在空间的位置和姿态确定的情况下,操作臂如何选择一条满足关节转角约束,且使所有关节转动角度之和为最小的最佳路径这一问题,给出了算法的实现过程。最后通过试验函数和9自由度操作臂的仿真结果,验证了该算法的正确性和可行性。     

网络化传感器在线编程方法的研究与实现

针对网络环境下传感器信息获取技术，提出了一种现场网络传感器在线编程技术的实现方法，即在线修改电子数据表单（TEDS）中描述的传感器的生产厂家、日期、校准参数等传感器属性的技术方法，并给出了CAN总线网络环境下与网络连接的数字接口。     

轴类零件中螺纹的程序加工工艺分析

这里分析了轴类零件中螺纹的工艺方案制订及采用BE小NG-FANUC 0i Mate-TB系统进行数控编程的方法.     

数控车削加工中刀尖圆弧半径补偿分析

车刀刀尖半径补偿是数控车削加工中的常见问题,本文重点就刀尖半径的影响及造成的加工偏差进行了分析,同时介绍了目前常用的刀尖半径补偿方法。