实行强制性政策推进可再生能源规模化发展

国家试行可再生能源强制性市场份额政策,本文介绍其内涵及国外发展的一些经验和国内有关单位的研究情况.     

异构网络上MMS互连的实现

本文首先简述了ＭＭＳ的实际应用环境及其在ＭＡＰ上的实现，然后论述了ＢＩＴＢＵＳ上ＭＭＳ服务的建立，并在网络互连的基础上提出了异构网络ＭＭＳ互连实现的方法及步骤，最后对ＭＭＳ在制造环境中的应用提出了一些看法。     

工业控制网络协议MAP技术的研究与实现

计算机综合制造系统CIMS(Computer Integrated Manufacturing System)中最重要的子系统是计算机局部网络,MAP(Manufacturing Automation Protocol)则是CIMS系统中计算机局部控制网络的通信协议。本文着重研究MiniMAP网络技术,通过把目前技术比较成熟的产品(如ARCNET网络)和MiniMAP协议相结合,实现一种投资省、研制周期快的MiniMAP网络。     

微波测量的发展动态和趋势

微波测量是微波领域的重要方面,它直接关系到设计的微波系统和微波器件性能的好坏.本文从测量仪器的发展动态和趋势出发,论述了微波测量发展的六个可能方面,供读者参考.     

CIMS底层环境的网络与实设备之间的远程MMS通信

ＣＩＭＳ底层制造环境中各种计算机与自动化设备之间的通信是实现ＣＩＭＳ的基础。本文首先介绍ＣＩＭＳ底层环境中的网络，用于实设备间通信的国际标准ＭＭＳ，以及实设备入网技术的标准和策略，然后阐述了在ＢＩＴＢＵＳ网络支持下与机器人系统远程ＭＭＳ通信技术的研究与实现。     

Intelligent trajectory tracking of an aircraft in the presence of internal and external disturbances

This research deals with developing an intelligent trajectory tracking control approach for an aircraft in the presence of internal and external disturbances. Internal disturbances including actuators faults, unmodeled dynamics, and model uncertainties as well as the external disturbances such as wind turbulence significantly affect the performance of the common trajectory tracking control approaches. There are several fault‐tolerant control approaches in the literature to overcome the effects of specific actuator or sensor faults during the flight. However, trajectory tracking control of an air vehicle in the presence of unexpected faults and simultaneous presence of wind turbulence is still a challenging problem. In this paper, an intelligent neural network‐based model predictive control structure is proposed, where the prediction model is updated in each iteration based on a novel proposed online sequential multimodel structure. A hybrid offline‐online learning algorithm is adopted in the introduced online sequential multimodel structure to identify the time‐varying dynamics of the system. The proposed control structure can satisfactorily deal with unexpected actuator faults and structural damages as well as unmodeled dynamics and wind turbulence. The stability of the closed‐loop system is proved under some realistic assumptions. The simulation results demonstrate the high capability of the proposed approach for trajectory tracking control of a conventional aircraft in the simultaneous presence of system faults and external disturbances.     

基于IEC 61850的在线监测装置通信仿真系统开发与应用

为了对电力设备在线监测系统进行互操作测试和雪崩测试,提出了基于IEC 61850在线监测装置通信仿真系统的实现方法。该系统通过加载在线监测装置的SCL信息模型描述文件,模拟出间隔层各类型在线监测装置的数据通信行为,实现对站控层系统进行模拟仿真测试。实践证明,在线监测装置通信仿真系统在质量检测和工程调试上不仅缩短了测试周期,而且降低了测试难度。     

纳米Fe3O4磁性粒子合成过程中分散体系的影响

分别采用水体系化学共沉淀法和聚乙二醇体系化学共沉淀法制备了超顺磁性的纳米Fe3O4磁性粒子,并比较了它们在物相组成、磁性能以及分散稳定性等方面的差异．结果显示：在2种体系中制备的纳米Fe3O4磁性粒子都呈现出较好的超顺磁性,其中水体系中制备的纳米Fe3O4磁性粒子结晶度较高,聚乙二醇体系中制备的纳米Fe3O4磁性粒子磁化率和分散稳定性较优．     

Petri net modelling and design of task oriented messaging system for robot control

Manufacturing Message Specification (MMS) is an international standard for shop floor machine control. It defines a set of conceptual schema and an interactive software object known as Virtual Manufacturing Device (VMD). Many systems have been established using this protocol but very few formal methods have been used to build such systems. This paper addresses the problems of the design and analysis of a network-based task oriented messaging system for flexible robot task control using a Petri net. The information and message transfer processes of the MMS systems were analysed. The modelling methodology allows a top down approach by which the net model is decomposed into fine details with clear identification of components which can be realised directly from the model. This approach is illustrated in this paper by a Windows-based robot control prototype system implemented from the Petri net model. The prototype was built using Object Windows Library and the NetBIOS session layer protocol on a PC network.