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Power Monitor Networked Control Based on DeviceNet Field-bus
Zaiping Chen,Jianfeng Zhang,Chao Jia,Fan Wu 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
In this paper a networked monitor scheme with Powermonitor3000 monitor unit based on the DeviceNetfieldbus is proposed. We adopt SLC5/05 Controller produced by ROCKWELL Automation to controlPowermonitor3000 with DeviceNet fieldbus. Explicit Message mode, which is by M file communication mode, isutilized in this scheme for reading parameters, and this mode is the strongest DeviceNet communication mode. Thenetworked monitor scheme of Powermonitor3000 based on M file under DeviceNet is investigated. The procedure withPowermonitor3000 for online monitor electric transformer under DeviceNet fieldbus is introduced, which provides thereliable support for networked power distribution system and factory automation systems. The experimental results aregiven, in which the correctness and effectiveness of proposed scheme is verified.
Networked control systems based on Grey prediction compensation for Network-induced delay
Chen Zaiping,Wu Fan,Yin Xunlei 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
The insertion of the communication network in the networked control systems can induce delay, which maydegrade the performance of control systems and even destabilize the system. Firstly, some kinds of NCS random delayare analyzed in this paper. Since the time-delay between controller and actuator is not available, we use grey predictionmethod to get predictive value. Secondly, a kind of state observer with the ability to compensate random time-delay isdesigned. Lastly, based on predictive value we use state observe to compensate random time-delay. The simulationresults show the validity of the compensation method in this paper.
Implementation of Physical Platform for Networked Control Systems based on GPC
Chen Zaiping,Wu Fan,Ni Jianyun,Jia Chao 제어로봇시스템학회 2010 제어로봇시스템학회 국제학술대회 논문집 Vol.2010 No.10
The performance of a Networked Control System is affected by transmission time delays in the communications network. In order to prove effectiveness of NCS algorithm design, experiment must be carried out. Therefore design and implementation of NCS hardware simulation platform is necessary. In this paper, NCS hardware simulation platform connects three computers, first as an object, second as a controller, third as network congestion Data Sources. The third computer used as the resource of data blocking can realize the network time delay through the transmission of Multicast. Finally, experiment in the NCS hardware experiment platform verify the effectiveness of the theory method proposed in this paper.
Implementation of Embedded System for Ethernet/IP Protocol
CHEN Zaiping,SHAO Xia,JIA Chao,NI Jianyun 제어로봇시스템학회 2010 제어로봇시스템학회 국제학술대회 논문집 Vol.2010 No.10
Based on the Ethernet/IP protocol and communication interfaces with embedded microprocessor platform for analysis, discuss the advantages and disadvantages of the typical variety of hardware platforms and operating systems deeply, propose the most suitable options to realize the EtherNet/IP protocol data communications interface hardware. The experimental tests confirmed the validity of the proposed approach.
Li, Yao,Zhu, Shenmin,Liu, Qinglei,Gu, Jiajun,Guo, Zaiping,Chen, Zhixin,Feng, Chuanliang,Zhang, Di,Moon, Won-Jin The Royal Society of Chemistry 2012 Journal of materials chemistry Vol.22 No.6
<P>A high-performance anode material was prepared from a hierarchically structured activated carbon which contains <I>in situ</I> graphene and nano-graphite. The activated carbon was immersed in a solution of SnCl<SUB>2</SUB>·2H<SUB>2</SUB>O and subjected to ultrasound. As a result, nanoparticles of SnO<SUB>2</SUB> were uniformly deposited on the surface of the activated carbon. The composite material was then coated with a thin layer of carbon by soaking it in a sucrose solution, followed by carbonization of the adsorbed sucrose at 500 °C. The resulting composite showed an outstanding high-rate cycling performance that can deliver an initial discharge capacity of 1417 mAh g<SUP>−1</SUP> and maintain a discharge capacity of more than 400 mAh g<SUP>−1</SUP> after 100 cycles at a high current density of 1000 mA g<SUP>−1</SUP>. This outstanding electrochemical performance is likely to be related to a unique combination of the excellent electrical conductivity of the activated carbon with graphite layers formed inside, its hierarchical pore structure which enhances lithium-ion transportation, and the carbon coating which alleviates the effects of volume changes, shortens the distance for Li<SUP>+</SUP> diffusion, facilitates the transmission of electrons, and keeps the structure stable.</P> <P>Graphic Abstract</P><P>Carbon-coated SnO<SUB>2</SUB>@C nanocomposite with hierarchically porous structures and graphite layers inside was prepared by ultrasound and hydrothermal treatment, which showed an outstanding high-rate cycling performance for lithium-ion battery. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c1jm14290a'> </P>