全自动血液成分分离机系统的研究

针对国内成分血需求量大,且全部采用进口设备获取的现状,开发了具有自主知识产权的全自动血液成分分离系统。该系统由预装专用软件HIT—WG—A的上位机、CAN通信网络和下位分离机构成,HIT—WG—A软件用于用户创建分离程序和制备过程的数据管理,下位分离机利用多区域光学传感器及独特的挤压装置将经良好离心分离后的血液成分按用户要求转移到各个保存袋中。临床试验和批量化试制表明：整机性能优良,具有推广应用价值。     

基于PLC控制的全自动免熔铅制粒机的研究

目前国内铅酸电池行业多用岛津法生产铅粉,需将电解铅铸造成铅球或铅段,再利用球磨机磨碎成铅粉,由于受铅粒铸造工艺的影响,致使整个生产铅粉流程高污染、高能耗。对此,全自动免熔铅制粒机的开发势在必行。主要介绍了全自动免熔铅制粒机的机械原理、控制原理、主要设备及功能。该全自动免熔铅制粒机已经通过企业使用证明,能在冷态工作状态下将铅锭转化成大小均等的铅粒,并且集聚性能稳定、操作简单、节能环保、大大提高生产效率等优点。     

Utilizing the Explicit Finite Element Method for Studying Granular Flows

Granular flows are systems of complex dry particulates whose behavior is difficult to predict during sliding contact. Existing computational tools used to simulate granular flows are particle dynamics, cellular automata (CA), and continuum modeling. In the present investigation, another numerical tool—the explicit finite element method (FEM)—is analyzed as a potential technique for simulating granular flow. For this purpose, explicit dynamic finite element models of parallel shear cells were developed. These models contained 52 particles and consisted of granules that are both round and multi-shaped (diamond, triangle, and rectangle). Each parallel shear cell consisted of a smooth stationary top wall and a rough bottom surface that was given a prescribed velocity of U = 0.7 in/sec (1.78 cm/s). The coefficient of friction (COF) between the particle–particle and particle–wall collisions was varied between 0.0 and 0.75. Utilizing the output of the simulations, results are presented for the shear behavior, particle kinetic energy, and particle stresses within the shear cell as a function of time. As a means of validating the explicit technique for granular flow, a 75 particle, zero roughness, couette shear cell model (solid fraction of 0.50) is subsequently presented for which direct comparisons are made to the results published by Lun. [Lun, C.K. et al.: Phys. Fluids 8, 2868–2883 (1996)] Overall, the results indicate that the explicit FEM is a powerful tool for simulating granular flow phenomena in sliding contacts. In fact, the explicit method demonstrated several advantages over existing numerical techniques while providing equivalent accuracy to the molecular dynamics (MD) approach. These advantages included being able to monitor the collision (sub-surface and surface) stresses and kinetic energies of individual particles over time, the ability to analyze any particle shape, and the ability to capture force chains during granular flow.     

An Experimental Complex for Studying the Pulse-Periodic Diffuse Discharge Used for the Sterilization of Medical Instruments

An experimental complex for studying the processes that govern the initiation of a diffuse discharge was developed. The complex contains gas discharge chambers with various electrode systems and a high-voltage pulse-periodic generator. A specific feature of this complex's power supply system is that the dc bias-voltage source and the pulse generator can be used simultaneously. The pulse-periodic generator is based on a pulse transformer and a high-voltage shaper of nanosecond pulses with an amplitude of up to 120 kV and a rise time of <10 ns.     

武器系统维修性综合评价方法的研究

为了更加科学准确地对武器系统进行系统级的维修性综合评价,在综合考虑系统与组件间关系和评价指标间关联度的基础上引入了"影响度"。采用基于指标关联度的方法计算各组成部件维修性综合指数,然后基于各组成部件在系统综合评价中的权重得到系统维修性综合指数。最后通过计算分析各组成部件的各评价指标对武器系统维修性水平的影响度,以量的形式来实现对武器系统维修性的综合评价。使用该方法获得的评价结果更准确,更利于武器系统改进设计和维修性的增长。     

A Method for Studying the Effect of Extreme Pressure Additives on Rubbing Metal Surfaces

When a film of lubricant separates two moving metal surfaces, it may be subjected to radical changes in temperature as the severity of the forces changes. This paper is concerned with a technique which measures the temperature of the lubricant after it leaves the area of rubbing metal surfaces. Special attention was given to: (A) the changing load conditions, (B) the changes in frictional force, (C) the effect of phosphate coating of the metal surface, and (D) the effect of different lubricant compositions. A modification of the Shell Four-ball EP Lubricant Tester has been made which permits automatic recording of a temperature-load curve which registers the temperature and frictional forces with either constant or changing load.

The work has shown that as the load increases at a uniform rate, there may be drastic and sudden changes in lubricant temperature which depend on lubricant composition as well as on metal surface composition.     

复杂产品离散装配过程监控技术研究与应用

为了解决复杂产品装配过程监控复杂、装配数据与管理层脱节等问题,对面向复杂产品装配的监控技术进行了研究。对复杂产品装配业务流程和组织人员的监控数据需求进行了分析,提出了基于信息流模型的复杂产品离散装配过程分级监控方法,阐述了该方法中的装配现场实时数据采集、装配过程实时监控、装配进度偏差分级调整、基于组织权限的工时控制等关键技术。开发了系统软件,并验证了该软件,应用效果良好。     

昆虫图像的自动计数方法的研究

田问害虫调查工作是一项非常繁重的体力劳动,如何解决这一问题是一项非常有意义的任务.本文利用数字图像处理技术中连通区域标记的方法对昆虫图像中的小昆虫实现了自动计数,并进行了深入的研究.     

一种新型视频调焦方法的研究

介绍了一种新型的自动调焦的方法,它利用电视跟踪系统视频信号的峰值变化控制调焦镜组,来调整由于目标距离、温度等变化引起的成像焦面变化,得到清晰图像,完成电视自动调焦。     

基于近似测地线的分层次自动铺带轨迹规划方法

自动铺带技术是一种增量制造技术,适用于制造翼面、壁板等大尺寸、小曲率复合材料构件,具有加工成本低、效率高等特点。轨迹规划是自动铺带技术的关键环节,它直接关系到复合材料构件的成型精度与质量。现有的自动铺带轨迹规划方法难以便捷兼顾调控铺放间隙与防止铺放褶皱,保证铺带产品的最终质量。有鉴于此,提出了一种基于近似测地线的分层次铺放轨迹规划方法。主要目标是合理利用预浸带允许变形能力,在防止铺放褶皱产生的前提下,保证相邻带料不产生覆盖,且间隙不超过2.5 mm。首先,研究了铺放间隙的产生与演化规律,给出了几种典型曲面上初始铺放间隙的优化方法。接下来,提出了近似测地线的数学模型与求解格式。然后,基于铺放褶皱的产生机制与铺放间隙的演化规律,确定了近似测地线的测地曲率大小与符号。最后,在双曲面模具以及自由曲面模具上验证了所提出方法的有效性。     

[电动汽车稳定性控制]履带车辆混合驱动系统自动化建模

Tracked vehicle hybrid drive system is a kind of electromechanical transmission system and equipment. In order to improve the efficiency of system design and modeling, an automated modeling method was proposed for a series-parallel tracked vehicle hybrid drive systems. Based on the modeling of a power combining device and a power convergent device, the automated modeling principles were illustrated and the automated modeling rules and the screening conditions were further proposed. Then the final model equation eliminated intermediate quantity was derived. With the automated modeling method, some tracked vehicle hybrid drive systems were modeled in Simulink to validate the method. The automated modeling processes were programmed. And as an application demonstration for the automated modeling, optimal configuration seeking was described. The results show the method may build the model and screening the configuration automatically, which is a powerful method for rapid and automated modeling of tracked vehicle hybrid drive systems.     

基于MOOSE框架的热力全耦合仿真方法研究

现有热力耦合仿真方法大多基于多种工具间的数据传递,面临数据接口开发、异构网格映射等困难,且求解使用的固定点迭代等耦合算法在求解效率、精度和收敛性等方面存在问题。文中基于开源的多物理场耦合仿真（Multiphysics Object-Oriented Simulation Environment, MOOSE）框架开发了热力耦合仿真应用程序,实现了多场统一建模和全耦合求解。通过与商业软件基准案例对比校核计算程序,证明了程序的正确性,进而成功开展了某相控阵天线的热力耦合计算,表明程序具有应用于复杂电子设备热力耦合仿真的潜力。     

一种解调时统信号新方法的探讨

在原理分析的基础上,提出了用8098CPU作主控芯片,把IRIG-B码的模拟信号经A/D转换后,用数字逻辑来解调IRIG-B(AC)码的新方法。经理论分析和实践检验,证明它简单实用、同步精度高、具有较强的抗干扰能力。     

一种研究迁移现象的新方法

提出了一种基于数字图像处理应用干涉法研究迁移现象的新方法。重点分析了CCD尺寸测量光学系统的设计原理、图像采集及处理方法,实现了测试研究的智能化。     

一种解调时统信号新方法的探讨

在原理分析的基础上，提出了用８０９８ＣＰＵ作主控芯片，把ＩＲＩＧ－Ｂ码的模拟信号经Ａ／Ｄ转换后，用数字逻辑来解调ＩＲＩＧ－Ｂ（ＡＣ）码的新方法。经理论分析和实践检验，证明它简单实用、同步精度高、具有较强的抗干扰能力。     

复杂结构弹性角的计算

在风洞试验中通常选用弯刀机构作为支撑部件,它将受到很大的外载荷,所以它的弹性角也会有很大的变化.在弯刀机构的应用过程中,要求弯刀离散的变换角度,为了确保角度变换的正确性,要得出弹性角的计算公式,以方便不同载荷时的计算.文中基于材料力学的叠加原理,通过有限元的分析计算,提出了一种计算复杂结构弹性角的简单方法.     

一种研究齿轮传动动态性能的新方法

利用自动控制理论研究实际工况下齿轮传动的动态性能 ,通过系统辨识算法 ,建立了直齿圆柱齿轮传动周向振动和噪声之间的差分方程模型 ,此模型能够准确描述齿轮传动系统的动态特性。为齿轮传动系统的动态性能研究提供了一种新的研究方法     

Experimental and Computational Methods for Studying Multicomponent Equilibria. II. An Automated System for Precision emf Titrations

ABSTRACT

A potentiometric titrator designed mainly for complex formation investigations is described. The titrator is constructed from electronic building blocks, without a computer. The functioning of the titrator may be described by a rigid cyclic program with the possibility of adapting the titrator to the actual chemical system by varying a few key parameters on thumbwheel switches. Before the titration, the experimenter makes the decisions necessary. The titrator has no inherent facilities to decide whether equilibrium has been attained. Experiences gained with this titrator and the advantages over a computer-based system are discussed.     

An Automated Installation for Measuring the Complex Thermal Expansion Coefficient of Polymers by the Modulation Dilatometry Technique

An installation designed for measuring the relaxation component of thermal expansion, a typical feature of polymers due to the conformational mechanism of thermal expansion inherent in them, is described. The relaxation component manifests itself as a shift in the expansion variation phase relative to the temperature variations. The installation allows variations of the temperature-oscillation frequency and amplitude in the ranges of 10^–3 to 10^–1 Hz and 1–5 K, respectively. The expansion variation amplitudes were measured using a mechanotron with a sensitivity of at least 10^–2 m. The serviceability of the installation was demonstrated in studies of the thermal expansion of a polymer (polyvinylacetate, PVA). In these studies, a shift in the expansion–temperature phase in the polymer-vitrification region and its dependence on the temperature-oscillation frequency were recorded.     

基于产品分解结构的复杂产品工作分解技术研究

为保证复杂产品研制工作分解的全面和彻底,提出了基于产品分解结构（PBS）的复杂产品研制工作分解技术。在适合复杂产品研制工作分解的PBS模型、工作分解结构（WBS）模型和WBS元模型的基础上,通过对PBS-WBS映射类型的分析、映射模型的定义、映射矩阵的编制和映射规则的建立,按层次分阶段逐级完成了从PBS到WBS的映射,实现了WBS的快速构建,从而以统一规范的方法保证了复杂产品全生命周期技术视图向管理视图高效且准确的转换。在此基础上开发了原型系统,以运载火箭为应用对象对系统进行了验证。