基于SmarTeam的弹箭CAPP集成系统

根据弹箭产品的加工特点,通过对CAPP系统中功能集成和信息集成机制的研究,整合了PDM与CAPP系统功能,解决了系统信息共享和数据的一致性问题,开发了基于SmarTeam的弹箭CAPP集成系统。该系统具有许多目前CAPP系统所不具备的功能和特点,它可以提高系统的并行性、适应性和集成性,实现企业产品数据管理的统一、集成和共享,大大缩短了产品的制造周期。     

面向PLM的弹箭合同管理系统集成技术实现

根据某兵工企业的实际需求,提出了弹箭合同管理子系统与PDM系统的集成架构。深入研究了基于SmarTeam的关键集成技术。最后介绍了系统集成技术的实现。     

PLM为基的弹箭外协系统集成技术实现

从现代兵工企业应用实际出发,提出弹箭外协系统及其他系统与PDM系统的集成架构.深入研究SmarTeam二次开发技术;论证PDM平台的应用集成模式;指出系统集成的关键技术.通过实例介绍系统集成技术的实现方法、实现过程.     

基于混合遗传算法的弹箭气动参数优化

弹箭气动参数是影响弹箭飞行运动的重要因素.在弹箭气动参数优化过程中,传统优化方法容易陷入局部最优解.为此,提出了混合遗传算法用于弹箭参数优化.它将传统模拟退火方法与遗传算法全局搜索能力相结合.仿真结果表明,混合基因算法比单一算法优化效果好.     

基于混合遗传算法的弹箭气动参数优化（英文）

弹箭气动参数是影响弹箭飞行运动的重要因素。在弹箭气动参数优化过程中,传统优化方法容易陷入局部最优解。为此,提出了混合遗传算法用于弹箭参数优化。它将传统模拟退火方法与遗传算法全局搜索能力相结合。仿真结果表明,混合基因算法比单一算法优化效果好。     

基于智能变形技术的火箭弹特性分析（英文）

偏转头部控制是一种新概念快速响应的控制方式。弹头部相对于弹轴进行局部偏转,并且在弹头的迎风面和背风面形成压力差从而产生空气控制力,在弹药系统里,这是一个高效并具有良好应用前景的控制方式。基于智能材料和结构的弹箭头部智能变形驱动机构可以使弹箭获得额外的控制力和控制力矩,改变弹丸在飞行过程中的空气动力特性,在弹箭飞行过程中会产生附加的平衡角、侧滑角,进而产生机动过载,控制飞行姿态和飞行弹道,并在最后时限提高弹丸的射击精确度。为了研究自适应控制弹箭的特性,利用流体力学软件对尾翼稳定的火箭弹进行了数值模拟。获得不同头部偏角、不同马赫数和不同攻角情况下的弹箭空气动力学特性。结果表明,偏转头部控制对弹箭的头部具有较大的影响,并且引起流场的不对称性。弹头部迎风面和背风面的压力差为弹箭提供较大的升力。最后,做弹道试验验证了仿真的研究结果。研究结果可以为自适应弹箭的设计及优化提供理论基础,并为智能弹药的研究提供新思路和新方法。     

热力复合作用下的典型弹箭结构优化设计

以气动力热影响较大的典型弹箭结构为研究对象,研究热力复合作用下的典型弹箭结构在结构性能约束下,以减轻结构重量为目标的结构优化设计方法。通过Isight优化设计平台集成Ansys,并利用Ansys的APDL参数化建模技术和热力复合加载分析技术,建立了典型弹箭结构的仿真模型。典型算例的结果表明:优化设计后,在满足强度、刚度条件下重量减轻了19.8%,减重效果明显,验证了模型的合理性和方法的有效性,对典型弹箭结构分析模型建立和优化设计提供了参考。     

沈阳自动化所在火炸药智能制造领域取得新突破

正中国科学院沈阳自动化研究所在弹箭类产品安全总装智能生产线的基础上,将数字化安全制造技术进一步拓展至产业链上游"火炸药"领域,取得了新突破。火炸药是具有爆炸性的物质,其制造过程为典型的危险复杂流程性制造,生产的安全性为其首要条件。受制高安全及高复杂要求,火炸药制造技术水平发展滞后,急需提升。沈阳自动化所装备制造技术研究室攻克流程制     

基于成组技术的弹箭总装工艺设计研究

介绍了弹箭总装工艺设计的现状及弊端,提出了基于成组技术的弹箭总装工艺设计思想。通过对各待装配件的功能名称及装配工艺特点进行统计和分析,采用视检法进行待装配件的分组。采用复合路线法进行待装配组的成组工艺路线设计和成组工序设计,并以待装配组为基础单元,制定工艺流程设计准则,进行弹箭总装工艺流程设计。     

CAPP系统与SmarTeam集成技术的研究

从CAPP系统的现状出发 ,分析了当前CAPP系统的问题 ,提出了面向PDM的集成化CAPP系统的思想。针对SmarTeam这一PDM软件给出了系统的体系结构 ,随后对CAPP系统和SmarTeam系统的集成技术进行了研究 ,探讨了CAPP系统与SmarTeam系统集成的关键技术     

Minimal Realization of Linear Graph Models for Multi-physics Systems

An engineering system may consist of several different types of components,belonging to such physical"domains"as mechanical,electrical,fluid,and thermal.It is t...     

INTEGRAL EQUATION METHOD＇S APPLICATION IN HOLE-EDGE STRESS OF COMPOSITE MATERIAL PLATE WITH DIFFERENT SHAPED HOLES

The strength of composite plate with different hole-shapes is always one of the most important but complicated issues in the application of the composite material. The holes will lead to mutations and discontinuity to the structure. So the hole-edge stress concentration is always a serious phenomenon. And the phenomenon makes the structure strength decrease very quickly to form dangerous weak points. Most partial damage begins from these weak points. According to the complex variable functions theory, the accurate boundary condition of composite plate with different hole-shapes is founded by conformal mapping method to settle the boundary condition problem of complex hole-shapes. Composite plate with commonly hole-shapes in engineering is studied by several complex variable stress fimction. The boundary integral equations are founded based on exact boundary conditions. Then the exact hole-edge stress analytic solution of composite plate with rectangle holes and wing manholes is resolved. Both of offset axis loadings and its influences on the stress concentration coefficient of the hole-edge are discussed. And comparisons of different loads along various offset axis on the hole-edge stress distribution of orthotropic plate with rectangle hole or wing manhole are made. It can be concluded that hole-edge with continuous variable curvatures might help to decrease the stress concentration coefficient; and smaller angle of outer load and fiber can decrease the stress peak value.     

Non-monotonic material contrast in scanning ion and scanning electron images

30 keV Ga⁺ focused ion beam induced secondary electron (iSE) imaging was used to determine the relative contrast between several materials. The iSE signal compared from C, Si, Al, Ti, Cr, Ni, Cu, Mo, Ag, and W metal layers does not decrease with an increase in target atomic number Z₂, and shows a non-monotonic relationship between contrast and Z₂. The non-monotonic relationship is attributed to periodic fluctuations of the stopping power and sputter yield inherent to the ion–solid interactions. In addition, material contrast from electron-induced secondary electron (eSE) and backscattered electron (BSE) images using scanning electron microscopy (SEM) also shows non-monotonic contrast as a function of Z₂, following the periodic behavior of the stopping power for electron–solid interactions. A comparison of the iSE and eSE results shows similar relative contrast between the metal layers, and not complementary contrast as conventionally understood. These similarities in the contrast behavior can be attributed to similarities in the periodic and non-monotonic function defined by incident particle–solid interaction theory.     

Application of Feature Extraction through Convolution Neural Networks and SVM Classifier for Robust Grading of Apples

This paper proposes a novel grading method of apples,in an automated grading device that uses convolutional neural networks to extract the size,color,texture,an...     

分布动态载荷识别的抗噪处理

针对正交多项式频域法在用多种响应对矩形薄板进行载荷识别中抗噪性较差的问题,综合运用平均法、矩阵预处理和奇异值截断法等方法对之进行改善,并引入空间映射的思想,将该方法的应用范围拓展为复杂的模型.利用仿真算例,证实了该方法具有较好的抗噪性.     

Short-Term Relay Quality Prediction Algorithm Based on Long and Short-Term Memory

The fraction defective of semi-finished products is predicted to optimize the process of relay production lines, by which production quality and productivity ar...     

End-to-End Multiview Gesture Recognition for Autonomous Car Parking System

The use of hand gestures can be the most intuitive human-machine interaction medium.The early approaches for hand gesture recognition used device-based methods....     

基于MELTAC-N平台的核电厂安全级DCS环网研究与测试

针对工程实践中环网通讯相关问题的处理缺乏理论基础及国产化安全级DCS平台的开发缺乏成熟经验借鉴问题,对基于MELTAC-N平台核电厂安全级DCS环网的软硬件实现进行了研究。提出了安全级DCS环网双环网冗余设计、光切换开关设计等硬件设计方法,以及以RPR协议为基础,采用全数据收发策略的软件设计方法。在CPR1000安全级DCS平台上对安全级DCS环网的可靠性及实时性进行了评价,并进行了容错能力、响应时间及响应时间稳定性测试验证实验。结果表明,基于MELTAC-N平台安全级DCS环网软硬件设计具有较好的容错能力及响应时间稳定性。     

The laboratory simulation of abrasive wear

Abrasive wear has long been recognised as one of the most potentially serious tribological problems facing the operators of many types of plant and machinery; several industrial surveys have indicated that wear by abrasion can be responsible for more than 50% of unscheduled machine and plant stoppages. Locating the operating point of a tribological contact in an appropriate operational ‚map’︁ can provide a useful guide to the likely nature and origins of the surface degradation experienced in use, though care must be exercised in choosing the most suitable parameters for the axes of the plot. Laboratory testing of materials and simulations of machine contacts are carried out for a number of purposes; at one level for the very practical aims of ranking candidate materials or surface hardening treatments in order of their wear resistance, or in an attempt to predict wear lives under field conditions. More fundamentally, tests may be aimed at elucidating the essential physical mechanisms of surface damage and loss, with the longer term aim of building an analytical and predictive model of the wear process itself. In many cases, component surface damage is brought about by the ingress of hard, particulate matter into machine bearing or sealing clearances. These may be running dry although, more usually, a lubricant or service fluid is present at the interface. A number of standardised wear test geometries and procedures have been established for both two- and three-body wear situations, and these are briefly described. Although abrasive wear is often modelled as following an ‚Archard’︁ equation (i.e. a linear increase in material loss with both load and time, and an inverse dependence on specimen hardness) both industrial experience and laboratory tests of particularly lubricated contacts show that this is not always the case: increasing the hardness differential in an abrasively contaminated lubricated pair may not always reduce the rate of damage to the harder surface.     

ANGULAR DISTORTION ALLOWABLE VALUE AND ASSESS METHOD OF WELD ON COKE TOWER

A graph as the new engineering method for estimate the safety of bulging deformation of coke tower is proposed. Through stresses analysis of circumferential weld of coke tower and comparing the stresses produced by pressure with heat stress of steady state, residual stress, bending stress produced by both itself weight and wind loads, it showed that the stresses produced by pressure on the angle distortion are the main factor of equivalent stress of the combined stress. After comparing four kinds of stress controlling conditions, the relation to stress with depth of angular distortion, grade of curvature of angular distortion and half of region of angular distortion has been inferred. Graph of deformation allowable value of coke tower for different condition by angular distortion and half of region of angular distortion has been plotted. The five steps for its engineering use have been explained. The lighter the grade of curvature is, the larger of bulge allowance, may be, and the bigger of depth of angular distortion may pose too. For the coke tower with a popular structure of Dg 5 400 mm×28 mm, the result by graph is nearly more than the result of two formulas formed by other research, the error is less than 7.0%. But, the graph can be easily applied to different size of angular distortion.