复杂自动化控制系统故障诊断方法研究与改进

近年来,自动化在工业生产、航空航天等不同领域得到了广泛运用,自动化控制系统随之孕育而生;自动化发展不断推进,长期生产使用中,传统自动化控制系统故障诊断方法出现多数据环境下故障诊断率低、多因素分析算法跟进力不足等问题;针对问题出现原因根源,提出复杂自动化控制系统故障诊断方法改进设计;采用数据罩筛引擎(GEP),对复杂自动化控制系统数据进行收集、整理、分析、模型创建;通过运行单元动态判断模块(DNGF)与多因素基准库(VSFVR)配合,完成对传统复杂自动化控制系统复杂环境下故障诊断方法的改进;通过仿真实验证明,复杂自动化控制系统故障诊断方法的改进,各项测试参数优于传统方法。     

LED灯具在线老化测试新方法研究

为解决LED灯具寿命老化测试普遍存在的操作流程复杂、自动化程度低、老化过程监测不连续而难以精确获得失效节点等问题,提出一种在线自动老化测试新方法,开发LED照明灯具自动化在线老化测试系统,全程由中心计算机程控并脱离人为操作,实时连续监测LED灯具老化过程中的光衰、电参数等指标,实现LED照明灯具的自动化在线寿命老化测试。     

Design,synthesis and use of binary encoded synthetic chemical libraries

Summary With the advent of combinatorial chemistry a new paradigm is evolving in the field of drug discovery. The approach is based on an integration of chemistry, high-throughput screening and automation engineering. The chemistry arm is usually based on solid-phase synthesis technology as the preferred approach to library construction. One of the most powerful of the solid-phase methods is encoded split synthesis, in which the reaction history experience by each polymeric bead is unambiguously recorded. This split-and-pool approach, employing chemically robust tags, was used to construct a 85 000-membered dihydrobenzopyran library.     

一种用于长焦距、大孔径空间相机的实时检焦系统

为了对空间相机实时进行检调焦 ,提出了一种自准直法精密检焦系统 ,该方法利用五棱镜代替大平面反射镜 ,用CCD为光电转换器件 ,用半导体激光器做光源 ,结构紧凑 ,稳定可靠。通过相关数据处理和拟合技术 ,提高了检焦系统的分辨率。实验结果表明该方法能够达 5 μm以内的检测精度 ,并具有调整方便以及较好的实时性等优点。     

On the inverse FPR problem: Quantum is classical

The notion of quantum supports introduced by Foulis, Piron, and Randall can be used to construct combinatorial versions of contextualist hidden-variable models for finite quantum logics. The original logic can be uniquely recovered from appropriate such models as a solution of a combinatorial inverse problem. One can thus set up a classical ontology for a finite quantum logics that completely specifies it. Computer studies are used to explore the ideas.     

New high-throughput material-exploration system based on combinatorial chemistry and electrostatic atomization

As a tool to facilitate future material explorations, our group has developed a new combinatorial system for the high-throughput preparation of compounds made up of more than three components. The system works in two steps: the atomization of a liquid by a high electric field followed by deposition to a grounded substrate. The combinatorial system based on this method has plural syringe pumps. The each starting materials are fed through the syringe pumps into a manifold, thoroughly mixed as they pass through the manifold, and atomized from the tip of a stainless steel nozzle onto a grounded substrate.     

迎风凹腔与逆向喷流组合热防护系统冷却效果研究

对迎风凹腔与逆向喷流组合热防护系统的冷却效果进行了分析, 研究了相同总压不同流速的逆向喷流对组合结构的流场、气动受力及壁面传热的影响. 通过与相关的实验结果对比, 验证了数值方法的可靠性. 研究发现:该结构能够有效地对飞行器鼻锥表面进行冷却, 引入很小总压的逆向喷流(逆喷总压比 PR=0.1), 组合结构的冷却效果就可以远远优于单一的迎风凹腔; 相同逆向喷流总压下, 逆喷速度越高, 逆喷流量越大, 外壁面的冷却效果越好; 随逆喷流速提高, 气动阻力也进一步减小. 本文研究的组合结构非常适用于远程、 需长时间飞行的高超声速飞行器的热防护.     

迎风凹腔与逆向喷流组合热防护系统冷却效果研究

对迎风凹腔与逆向喷流组合热防护系统的冷却效果进行了分析, 研究了相同总压不同流速的逆向喷流对组合结构的流场、气动受力及壁面传热的影响. 通过与相关的实验结果对比, 验证了数值方法的可靠性. 研究发现:该结构能够有效地对飞行器鼻锥表面进行冷却, 引入很小总压的逆向喷流(逆喷总压比 PR=0.1), 组合结构的冷却效果就可以远远优于单一的迎风凹腔; 相同逆向喷流总压下, 逆喷速度越高, 逆喷流量越大, 外壁面的冷却效果越好; 随逆喷流速提高, 气动阻力也进一步减小. 本文研究的组合结构非常适用于     

Effects of temperature and oxygen pressure on binary oxide growth using aperture-controlled combinatorial pulsed-laser deposition

In pulsed-laser deposition (PLD), there are many processing parameters that influence film properties such as substrate-target distance, background reactive gas pressure, laser energy, substrate temperature and composition in multi-component systems. By introducing a 12.7-mm diameter circular aperture in front of a 76.2-mm silicon wafer and rotating the substrate while changing conditions during the PLD process, these parameters may be studied in a combinatorial fashion, discretely as a function of processing conditions. We demonstrate the use of the aperture technique to systematically study the effects of oxygen partial pressure on the film stoichiometry and growth rate of VO_x, using Rutherford backscattering spectrometry (RBS). In another example, we discuss the effect of growth temperature on TiO₂ films characterized by X-ray diffraction and Fourier transform far-infrared (Terahertz) absorption spectroscopy. We demonstrate that we have considerable combinatorial control of other processing variables besides composition in our combi-PLD system. These may be used to systematically study film growth and properties.     

High-throughput research on superconductivity

As an essential component of the Materials Genome Initiative aiming to shorten the period of materials research and development, combinatorial synthesis and rapid characterization technologies have been playing a more and more important role in exploring new materials and comprehensively understanding materials properties. In this review, we discuss the advantages of high-throughput experimental techniques in researches on superconductors. The evolution of combinatorial thin-film technology and several high-speed screening devices are briefly introduced. We emphasize the necessity to develop new high-throughput research modes such as a combination of high-throughput techniques and conventional methods.     

机动车协商模型与分岔特性研究

在环行交叉路口交通流中, 由于行驶目的的不同存在三种类型冲突. 为了真实模拟人类的自治性和智能性, 先将机动车建立为一个含有驾驶员模型的智能体, 再耦合环行交叉口的元胞自动机模型组成多智能体系统. 在总结每种类型交通冲突特点和规律的基础上, 提出通过优先级策略和动态协商机制消解机动车智能体相互之间的冲突问题. 以某中小城市城的典型环行交叉路口交通流量为样本数据, 对比验证模型的正确性, 并且进一步研究了交通流的分岔特性, 发现一定条件下流量的周期分岔和混沌现象. 数值模拟结果表明, 所建模型符合实际情况, 并且内环发生冲突越严重车流量越低, 随着机动车属性参数k和p的变化, 系统从稳定走向分岔再到混沌. 关键词： 多智能体 元胞自动机 协商 分岔     

基于CAN总线的振动试验智能监控系统软件设计

振动试验是为了保障航天及民用产品可靠性的重要试验手段,传统的振动试验对功放的操作繁琐,效率低下,已经越来越无法适应新型振动试验的发展。提出一种基于CAN总线控制器构建的振动试验功率放大器远程监控系统,使用Visual C++进行编程,实现了在计算上对功率放大器的远程操作,解放了操作人员,同时由于计算机的开放性,系统可以扩展出运行参数实时显示,配置本地存储、保护互锁、开机自检等功能,最后通过实验验证表明系统软件运行可靠,达到了预期的设计目的。     

基于指数加权卡尔曼滤波的组合定姿算法

嵌入式软件系统的测试通常需要对其被控对象或者环境进行仿真,以进行硬件在环的闭环验证,在软件测试中很有必要将被控对象的实时仿真模型与被测系统连接起来进行闭环测试。在总结分析嵌入式测试领域的新需求的基础上,提出了一种基于分布式仿真测试环境的嵌入式软件自动化测试系统。该系统具有较强的测试管理能力,以实时仿真机为核心,以及接口的模块化定制,实现了对系统动态特性的半实物仿真软硬件环境,很好的解决了嵌入式系统内存资源较少,与硬件紧密相关等问题。     

Controlling computers and apparatus of the automation subsystems of the “Del'fin” facility

The architecture of the controlling computer assembly (CCA) of the “Del'fin” facility, the apparatus, and the software of the system are considered. The apparatus of the “supply” automation system controls the energy supply to the amplifier module on the basis of a capacitor bank with 2.5-mJ energy. The elemental base of the “adjustment” automation subsystem is developed. It includes the mounts for the mirrors actuated by stepper motors (SM), the drivers of the stepper motors, the optical heads with coordinate-sensitive receivers, logic blocks, and other elements. The trends in the development of CCA and of automation subsystems are considered.     

Low frictional property of copper oxide thin films optimised using a combinatorial sputter coating system

A combinatorial sputter coating system has been developed that can optimize the crystal preferred orientation of coating films. With this system, it is possible to synthesize various kinds of coatings whilst precisely controlling conditions such as the sputter gas, the gas pressure, the gas partial pressure, the r.f. power, the substrate temperature, the distance between the substrate and target, etc. In this way, we successfully synthesized copper oxide coatings with different crystal preferred orientations, and low frictional property was obtained by optimizing the crystal preferred orientation.     

Combinatorics of Matrix Factorizations and Integrable Systems

We study relations between the eigenvectors of rational matrix functions on the Riemann sphere. Our main result is that for a subclass of functions that are products of two elementary blocks it is possible to represent these relations in a combinatorial–geometric way using a diagram of a cube. In this representation, vertices of the cube represent eigenvectors, edges are labeled by differences of locations of zeroes and poles of the determinant of our matrix function, and each face corresponds to a particular choice of a coordinate system on the space of such functions. Moreover, for each face this labeling encodes, in a neat and efficient way, a generating function for the expressions of the remaining four eigenvectors that label the opposing face of the cube in terms of the coordinates represented by the chosen face. The main motivation behind this work is that when our matrix is a Lax matrix of a discrete integrable system, such generating functions can be interpreted as Lagrangians of the system, and a choice of a particular face corresponds to a choice of the direction of the motion.     

On the continuous limit of integrable lattices I. The Kac-Moerbeke system and KdV theory

KdV theory is constructed systematically through the continuous limit of the Kac-Moerbeke system. The infinitely many commuting vector fields, the conserved functionals, the Lax pairs and the biHamiltonian structure are recovered as the limits of suitably defined linear combinations of homologous objects for the Kac-Moerbeke system. The combinatorial aspects of this recombination method are treated in detail.     

Design and development of an ultra-compact drum-shaped chamber for combinatorial pulsed laser deposition

We have designed a compact combinatorial pulsed laser deposition (PLD) chamber as a building block of a desktop laboratory for advanced materials research. Development of small-size systems for the growth and characterization of films would greatly help in interconnecting a variety of analytical tools for rapid screening of advanced materials. This PLD chamber has four special features: (1) a drum-shaped growth chamber, (2) a waterwheel-like combinatorial masking system, (3) a multi-target system having one feedthrough, and (4) a small reflection high-energy electron diffraction (RHEED) system. The performance of this system is demonstrated by the RHEED intensity oscillation during homoepitaxial growth of SrTiO₃ as well as by simultaneous fabrication of a ternary phase diagram of rare earth-doped Y₂O₃ phosphors.