柔性制造系统的托盘优化

本文讨论Job-shop型柔性制造系统的托盘优化问题,给出了求最小托盘数的算法,把托盘优化问题化成了求解线性整数规划问题.     

不同锚杆参数对锚固系统稳定性影响研究

为了研究不同锚杆参数对锚固系统稳定性的影响，采用理论分析和数值模拟相结合的方法，理论分析了围岩协同锚固系统力学模型和锚杆锚固段的“大托盘”效应，数值模拟了不同锚杆长度、锚杆密度和锚杆预紧力下群锚杆最小主应力分布，分析了锚杆围岩形成的挤压带范围，得到了相关参数对锚固系统稳定性的影响。研究为巷道支护提供了理论指导。     

A microcomputer-based pallet layout system to evaluate and improve storage space utilization

This paper discusses a microcomputer-based system used to maximize the storage space utilization for palletized materials. Pallet and carton sizes and stacking constraints for specific stock numbers are used to compute and select the best layout from several possible alternatives. The results, giving the simplest stable layout, are converted to graphic form and printed on a dot-matrix printer for use by Engineers and Warehouse personnel in evaluating and improving storage space utilization.     

60kt／a硫酸转化器的设计与使用情况

总结了息烽重钙厂二期６０ｋｔ／ａ硫酸转化器的设计与运行情况。     

基于激光雷达的托盘位姿识别算法及验证

托盘拾取是自动化仓储的重要环节之一,为提高叉车的托盘拾取能力,提出一种基于2-D激光雷达的托盘探测算法,实现托盘位置和姿态的识别。建立了托盘探测模型,确立了算法有效探测范围与激光点数量(分布于托盘支架正面)、托盘支架宽度和激光雷达分辨率的函数关系;通过改进的增量式直线提取算法,获取托盘姿态;根据托盘姿态,建立动态模板,以滑动窗口模式进行匹配,获取托盘位置。结果表明,有效探测范围,随激光点数量减小扩大,随托盘宽度增加而扩大,随分辨率增加而扩大;当激光扫描仪分辨率为0.33°,托盘支架宽度为90 mm时,实际探测范围符合托盘探测模型计算,x轴方向定位误差为±60 mm,y轴方向定位误差为±59 mm,托盘角度探测误差为±6°。本算法实现托盘位姿可靠识别,明确探测范围,为提高智能仓储装备拾取作业能力提供理论基础。     

葵型拱桥落架过程仿真分析

本文以有限元法为理论基础,通过ANSYS软件建立子牙河桥的全桥结构仿真模型,结合子牙河桥的实际施工过程,采用桥梁施工控制方法中的正装迭代法对钢筋混凝土葵型拱桥满堂支架落架施工控制进行分析,按照桥梁落架的施工过程进行仿真分析计算,提出切实可行的落架方案,对施工过程进行理论指导,确保施工过程中桥梁的安全,降低施工难度,加快施工进度。     

A kinematic model for machine tool accuracy characterisation

A method for characterising machine tool accuracy is presented in this paper, using a compact quasi-static error model of a three-axis horizontal machining centre. Rigid-body kinematics and homogeneous coordinate transformation were used in this model. A metrology pallet was designed so that coefficents in the error model can be updated periodically. Ten measurement points were allocated on two perpendicular planes of the metrology pallet. One of the measurement planes was on the work table and the other was perpendicular to the table. Two different length touch trigger probes were required for error measurements. Establishing or updating the error model can be carried out in-process without disturbing the workpiece setup. The proposed compact error model is an improvement over past work for a production environment because of its robustness and convenient calibration procedure. The error model was tested in two dimensions and a good error prediction capability was observed in warm machine states.     

浅谈焦渣混凝土在拱桥旧桥加固中的应用

就利用焦渣混凝土加固旧拱桥，及其在试配、施工各方面进行了完整的论述，阐述了使用焦渣混凝土在加固旧拱桥中的重要意义。提出了其自身的优劣特点，说明了值得推广的经济价值。     

大跨度玻璃钢拱形屋面结构分析

对拱的稳定性、压弯构件的强度、薄板的局部稳定性、变形要求等方面分别进行了分析计算,并通过分析实例,对多种方案的结果进行了分析比较,从而确定了最佳设计方案,最终为建筑工程中加入了新的材料和新的结构类型。     

钢筋混凝土刚架拱桥震后加固

本文以实际工程为背景,较为系统的介绍了钢筋混凝土刚架拱桥震后加固的主要方法,由此得出的相关成果可供同类结构和桥型加固施工参考借鉴。