OPEN ARCHITECTURE CNC SYSTEM HITCNC AND KEY TECHNOLOGY

Aiming at the characteristics of modularity and reconfigurable in open architecture com-puter numerical control (CNC) system,the open architecture CNC system,Harbin Institute of Tech-nology computer numerical control (HITCNC),is researched and manufactured based on the interface standards. The system’s external interfaces are coincident with the corresponding international stan-dards,and the internal interfaces follow the open modular architecture controller (OMAC) agreement. In the research and manufacturing process,object-oriented technology is used to ensure the openness of the HITCNC,and static programming is applied in the CNC system according to the idea of modu-larization disassembly. The HITCNC also actualizes real-time and unreal-time modules adopting real-time dynamical linked library (RTDLL) and component object model (COM). Finite state ma-chine (FSM) is adopted to do dynamically modeling of HITCNC. The complete separation between the software and the hardware is achieved in the HITCNC by applying the SoftSERCANS technique. The application of the above key techniques decreases the programming workload greatly,and uses software programs replacing hardware functions,which offers plenty technique ensures for the open-ness of HITCNC. Finally,based on the HITCNC,a three-dimensional milling system is established. On the system,series experiments are done to validate the expandability and interchangeability of HITCNC. The results of the experiments show that the established open architecture CNC system HITCNC is correct and feasible,and has good openness.     

ROBOT＇S MOTION ERROR AND ONLINE COMPENSATION BASED ON FORCE SENSOR

Robot's dynamic motion error and on-line compensation based on multi-axis force sensor are dealt with.It is revealed that the reasons of the error are formed and the relations of the error are delivered.A motion equation of robot's termination with the error is established,and then,an error matrix and an error compensation matrix of the motion equation are also defined.An on-line error's compensation method is put forward to decrease the displacement error,which is a degree of millimeter,shown by the result of simulation of PUMA562 robot.     

制革前处理助剂—Ⅱ防腐剂和防霉剂

本文主要阐述了原料皮和浸水过程中生成的防腐以及皮革防霉的原理,介绍了防腐剂,防霉剂的种类,并从组成,结构,使用性能等角度对目前国内外一些典型的防腐剂,防霉剂进行了总结,提出了该类材料的发展方向。     

起重机起升机构动载特性的分析研究

对起重机起升机构动载特性进行了分析研究,建立了三质量二自由度的等儿扭振系统及相对应的动力学方程组。在建立数学模型的基础上,采用Ｓｉｍｕｌｉｎｋ仿真工具箱对起升机构四种典型工况进行了计算机仿真,并与实测特性曲线进行了分析比较,具有一定的工程应用价值。     

湖南省湘潭县九潭冲早震旦系锰矿床成因浅析

九潭冲锰矿位于湘中地区湘潭与湘乡交界处,属震旦系沉积加后期改造叠加的碳酸锰矿床类型.文章简要论述了矿床地质特征,浅析了矿床成因,从后期成矿的物理化学环境入手,初步总结了成矿规律及找矿标志.     

安装座多工位级进模设计

分析了安装座的冲压工艺性,介绍了其特殊级进模总体设计结构和排样方案。实践证明,该模具结构合理、可靠,能保证产品质量,对此类零件的级进模设计有参考价值。     

基于内容的可缩放性服务的负载分配研究

通过工作站或者PC集群利用客户机内容请求来进行负载分配,这种模式具有很多吸引人的特性,但当前Internet标准去实现以基于内容的负载分配有相当的困难。论述了为达到基于内容的负载分配的可缩放性服务(如WWW服务)的几种方法,并举例说明了这些方法的优缺点,介绍了其中能够实现基于内容的负载分配的一种方法：握手连接。详细介绍了一种由TCP握手连接扩展的向后兼容的协议。     

地下工程底板外防水施工组织与管理

通过一个施工区的PDCA循环,利用排列图和因果图分析方法,找出了施工中存在的问题,制定了相关对策,经过组织实施,取得了良好的防水效果,也为防水施工提供了成功的经验。     

水上高密度地震映像法勘探在水利工程中的应用

简述了水上高密度地震映像法的原理、使用的仪器设备和数据采集方法,结合实例介绍了水上高密度地震映像法勘探在水利枢纽闸底板基础损坏程度探测、河底抛石厚度和范围调查、河（湖泊）底淤泥厚度探查及在寻找水底障碍物中的应用效果.在检测水利枢纽闸底板受损程度时,采用了瞬时频率和振幅频率谱特征进行综合解释.     

高校毕业生质量评价体系的构建模型

根据科学、全面、可操作性的原则，从毕业生质量评价的特殊性出发，提出了构建高校毕业生质量评价体系的依据，在此基础上建立了毕业生质量分析结构表，应用灰色聚类定权法求得各指标权重，得出毕业生质量评价方法，实现了对高校毕业生质量评价体系模型的构建。