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A new open-circuit fault diagnosis scheme, which is capable for detecting one or two open-circuit fault of power switches in the back-to-back converter of a DFIG wind power generation system is proposed. A redundant topology for the back-to-back converter is set out enabling reconfiguration of the converter circuit once the faulty device or devices is identified and isolated. Simulation results show...
For the case of intercepting maneuvering target, A new nonlinear terminal guidance law with robustness is proposed by adopting nonlinear H∞ control theory. The mathematic model was built according to nonlinear kinematics relationship between missile and target whose acceleration as disturbance was introduced. Based on the terminal guidance law's measure of zeroing the line-of-sight angular rate and...
This paper presents the implementation scheme of MIPv6 protocol and improvement of key technology based on Adhoc network in Linux. The framework of implementing MIPv6 protocol is designed. The key technology of protocol implementation procedure is proposed, and the handover delay of mobility is analyzed and reduced. Finally experimental scenarios are set up, and the performance of mobile handover...
All of the traditional switch can not distinguish the different traffic classes accurately, in order to provide a better QoS for various traffics existing already and potential unknown future traffic, we considers the problem from the all new angle and propose a novel CICQ scheduling mechanism for differentiated QoS based on identifier. The mechanism management the network data flow in denomination...
With the rapid development of hi-tech garden and its urgent needs to strengthen the information construction and application, a 2D/3D integrated digital garden geographic information platform of B/S model was proposed. The GIS technology and SOA architecture was applied. Started from the analysis of the contents of digital garden platform, this essay described the design of the three-tiered structure...
This paper details the working principle of double closed-loop controlled chop-wave internal feedback cascade speed-regulation system, and further deducing transfer function of each link, such as the DC circuit of chopper and asynchronous motor, etc. Based on transfer function of controlled plant, the parameters of the control system regulators are adjusted and the formulas for the regulators are...
Torque ripple in the motor always caused poor operation quality of the system. Here, has proposed a new way to suppress the torque ripple of the PMSM. In this paper, use the Iterative learning Control (ILC) in time domain with passive filter to weaken the Torque Pulsating. The ILC was used to suppress the periodic torque ripple as cogging torque, nonperfect sinusoidal flux density distribution and...
Web-based Education is one of the directions of education development. The primary teaching mode in Chinese colleges is in classroom now, and to set up the network aided teaching platform (NATP) is a feasible way. Based on campus network it will finish the conformity of teaching assistant resources in the unit of course, by applying open source CMS under SCORM standard. Each course has the common...
M2M, means “Machine to Machine”, including “Machine to Mobile”, “Man to Machine”, etc., is the most popular application form of Internet of Things (IOT) in current stage, whose data transmission is supported by cable, wireless, mobile and other technology, which may be significant security vulnerabilities and risks. In addition, in many use cases, it is likely that M2M will be deployed in very large...
In this paper, attitude control problem of carbin air-launching during separation stages between plane and vehicle by reaction control system (RCS) was studied. First analyzed movement under different separation conditions between launch rocket and plane, then determined launch vehicle flight status when RCS fired and designed rocket pitching program. On this basis, given the standard trajectory programs...
This paper explored a new method: in the construction of MIS, introduction the workflow technology and realization the problem of business process flexible. The workflow construction model and the architecture of workflow engine are introduced in this paper. With those technologies can build a better flexibility MIS strategy and a new MIS framework design that meet modern business requirements, also...
Semantic video analysis and retrieval is an important way to deal with massive video data. To solve the shortcomings of video analysis directly based on low-level features, this paper presents a video analysis framework based on human subjective affections, the framework according to the impact on object human subjective affection. First, object-oriented model is established, based on object-oriented...
This paper proposes a new approach of controlling vehicles by detection of visual foot movement. It discusses the constraints imposed by the use of moving vehicle during real-time foot movement tracking. The visual feet tracking attributes ensure the fact that, unlike its counterpart in physical world, our driving does not involve effort of steering. The proposed technique comprises of two main parts;...
Target acquisition algorithm based on Sliding Mode Control (SMC) is proposed for TV tracking system. Target acquisition capability and performance are both improved, attributing to overcoming the deficiencies of traditional linear control. In this paper, sliding surface with variable coefficient and continuous control law without switching is introduced in the SMC controller design. The improved SMC...
A transfusion system faced to hospital is presented. The system has real-time monitoring and alarming (when there exit abnormal instance or the transfusion is completed) functions, which well settle the inconvenience of venous transfusion in clinic, and increase the security and efficiency. The Photoelectric sensor technology and signal processing technology are applied to acquire the reliable detection...
To guarantee the quality of service (QoS) when failure takes place, the fault-tolerant MultiProtocol Label Switching (MPLS) network should find out failures as soon as possible. This paper proposes a MPLS failure detection mechanism, named bimodal detection (BD). Based on the adaptive model (AM), it adaptively adjusts the detection period along with delay variation and occurrence of detection timeout...
Recently, various physical level issues are considered in advance at the stage of high-level synthesis to save cost and get better performance or lower power. Among the issues, temperature variation is widely studied, but to the best of our knowledge, the bus binding method in high-level synthesis to consider clock skew distortion due to non-uniform distribution of temperature has not been proposed...
Most of real-time task scheduling algorithm of embedded real-time systems are based on the worst time for the implementation of scheduling, which will be a waste of resources. Aiming at network system for real-time multimedia application requirements and the current scheduling algorithm lack of real-time performance(ability), this paper analyzes the typical dynamic EDF(Eealiest Deadline First) scheduling...
To improve the reliability of traditional supervision system for intelligent equipments, a supervision system based on redundant work stations is proposed and then the gateway applied in this system is designed. According characteristic of intelligent equipment communication protocol, the multicast gateway has relatively high performance, which is confirmed by the efficiency comparison of UDP with...
Traditional Web services, which are mainly technical specifications based on UDDI, provide service discovery by simple classification and key word matching, resulting in low precision ratio and recall ratio as well as low compatibility of service multiplexing and service composition. This paper, basing on Web service models and in combination with genetic algorithm, brings forward a multi-target optimization...
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