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《计算机集成制造系统》2014,(7)
针对目前产品定制协同开发任务分解缺乏综合定量分析的问题,提出一种综合考虑任务粒度、任务耦合度、任务均衡度的任务分解系统模型。对产品定制协同开发过程进行分析,给出了任务粒度、任务耦合度、任务均衡度的定义及其计算公式,提出了基于综合定量分析的产品定制任务分解系统模型。以某风机产品研发项目为例,验证了任务分解模型的可行性与有效性。 相似文献
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为了能够真实反映多重耦合及描述耦合过程的动态演变,设计了协同任务类型。提出了减少瓶颈问题的消息主动汇报机制和任务两层调度策略,以及提高多智能体系统设计合法性、灵活性的体系结构原型和自然语言通信功能的思想及方法。实现了可视化的多智能体系统集成开发环境。应用结果表明,借助集成开发环境进行多智能体系统和并行程序开发减少了用户在通信和管理方面的设计工作量,可有效提高开发效率和系统的健壮性。 相似文献
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基于遗传算法的e-制造调度系统研究 总被引:3,自引:1,他引:3
为了实现e-制造系统中制造任务的调度,基于e-制造哲理,对基于产品BOM流的e-制造调度问题进行了研究,提出并设计了e-制造调度系统的求解机制与数学模型,针对所建立的数学模型,设计和开发了一个基于遗传算法的物理e-制造单元调度系统,进而根据物理/逻辑e-制造单元、e-制造系统和e-制造任务之间的映射关系和动态关联,实现了e-制造系统调度的求解过程。最后,通过调度算例分析,表明该系统能有效完成e-制造系统中制造任务的调度。 相似文献
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研究了航电系统作战飞行程序的开发,软件组织的结构形式与组织的划分、软件的任务定向与功能模块、严密的软件控制、软件的设计验证和完整的软件试验;并对航电系统作战飞行程序开发环境的基本原理、开发环境的基本软件组成、航电系统作战飞行程序的综合开发/支持系统的基本结构和航电系统作战飞行程序硬件结构组成进行了分析;对航电系统作战飞行程序的应用进行了讨论。 相似文献
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研究并实现了机床产品协同设计任务管理功能。采用按功能划分和按结构划分相结合的方式对机床产品协同设计的任务进行分解。提出了机床协同设计层次式递归化任务分解模型,研究该任务管理所涉及的各个方面的具体实施情况,包括任务分解、任务分配、任务协调和任务工作流程的控制等。最后给出了任务管理系统的网络实现流程并开发了相应的原型系统。 相似文献
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We have built a high precision (24-bit) data acquisition (DAQ) system capable of simultaneously sampling eight input channels for the measurement of the electric dipole moment of the electron. The DAQ system consists of two main components: a master board for DAQ control and eight individual analog-to-digital converter (ADC) boards for signal processing. This custom DAQ system provides galvanic isolation of the ADC boards from each other and the master board using fiber optic communication to reduce the possibility of ground loop pickup and attain ultimate low levels of channel cross-talk. In this paper, we describe the implementation of the DAQ system and scrutinize its performance. 相似文献
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介绍了利用数据采集卡PCL-816基于LabVIEW进行数据采集的检测系统,该系统通过消除测量基准本身误差的误差分离技术对车床导轨坐标值进行测量,具有数据采集方便,精度高的特点. 相似文献
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Giacomelli L Zimbal A Reginatto M Tittelmeier K 《The Review of scientific instruments》2011,82(1):013505
A compact NE213 liquid scintillation neutron spectrometer with a new digital data acquisition (DAQ) system is now in operation at the Physikalisch-Technische Bundesanstalt (PTB). With the DAQ system, developed by ENEA Frascati, neutron spectrometry with high count rates in the order of 5×10(5) s(-1) is possible, roughly an order of magnitude higher than with an analog acquisition system. To validate the DAQ system, a new data analysis code was developed and tests were done using measurements with 14-MeV neutrons made at the PTB accelerator. Additional analysis was carried out to optimize the two-gate method used for neutron and gamma (n-γ) discrimination. The best results were obtained with gates of 35 ns and 80 ns. This indicates that the fast and medium decay time components of the NE213 light emission are the ones that are relevant for n-γ discrimination with the digital acquisition system. This differs from what is normally implemented in the analog pulse shape discrimination modules, namely, the fast and long decay emissions of the scintillating light. 相似文献
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Rokkam M Chatni MR ul Haque A De Carlo AR Robinson BF Irazoqui PP Porterfield DM 《The Review of scientific instruments》2007,78(4):044303
Microelectromechanical system (MEMS) development has become an active area for research in over the last decade. This area has advanced rapidly in recent years due to the potential ability of MEMS devices to perform complex functions in a smaller area. There is also the prospect to develop devices that can (1) be easily manufactured, (2) offer low power consumption, and (3) reduce waste. Especially in the BioMEMS area these advantages are important in terms of applied devices for biosensing, clinical diagnostics, physiological sensing, flow cytometry, and other lab-on-a-chip applications. However, one major obstacle that has been overlooked is the interface of these microdevices with the macroworld. This is critical to enable applications and development of the technology, as currently testing and analysis of data from these devices is mostly limited to generic microprobe stations. New advancements in BioMEMS have to occur in concert with the development of data acquisition systems and signal preprocessors to fully appreciate and test these developing technologies. In this work, we present the development of a cost effective, high throughput data acquisition system (Bio-HD DAQ) and a signal preprocessor for a MEMS-based cell electrophysiology lab-on-a-Chip (CEL-C) device. The signal preprocessor consists of a printed circuit board mounted with the CEL-C device and a 64-channel filter/amplifier circuit array. The data acquisition system includes a high-density crosspoint switching matrix that connects the signal preprocessor to a 16-channel, 18 bit, and 625 kSs DAQ card. Multimodule custom software designed on LABVIEW 7.0 is used to control the DAQ system. While this version of the Bio-HD DAQ system and accompanying software are designed keeping in view the specific requirements of the CEL-C device, it is highly adaptable and, with minor modifications, can become a generic data acquisition system for MEMS development, testing, and application. 相似文献
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提出了一种主要通过软件来拓宽数据采集仪动态范围的方法:虚拟多核数据采集技术。该方法利用1个A/D,对同一个输入信号进行多路连续扫描采集;然后由软件按照一定的规则对所采集到的数据再进行2次重采样,达到拓宽动态范围的目的。相比多核数据采集方法,该方法主要由软件来间接提高A/D的分辨率,具有成本低、可修改性强等优点;相比单核数据采集仪,该方法可使采集仪在高采样率工作时也能得到高的分辨率和大的动态范围。实验仿真结果表明方法理论上是可行的。 相似文献
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基于PXI总线的高精度同步数据采集卡设计 总被引:1,自引:0,他引:1
随着科学技术的发展,军事、航空航天等众多领域对于数据采集产品的采集精度、通道间相位差要求越来越高,基于PXI总线的高精度同步数据采集卡就应运而生.该文从模拟信号调理、A/D转换、FPGA控制、PCI接口等电路详细描述了基于PXI总线的高精度同步数据采集卡的设计,并对影响采集卡的采集精度、同步性等重要指标的关键设计技术进... 相似文献