Advanced Materials Research Vols. 760-762

Abstract: This paper introduces the typical network management technology and some hot technology. The trend of network management development in the future is prospected based on the analysis of the current network management technology.

Abstract: Researches on technologies about testing aggregate bandwidth of file systems in cloud storage systems. Through the memory file system, network file system, parallel file system theory analysis, according to the cloud storage system polymerization bandwidth and concept, developed to cloud storage environment file system polymerization bandwidth test software called FSPoly. In this paper, use FSpoly to luster file system testing, find reasonable test methods, and then evaluations latest development in cloud storage system file system performance by using FSPoly.

Abstract: A dynamic inversion adaptive sliding mode flight control method for autonomous aerial refueling (AAR) is approved in this paper. The drogue model and refueling aircraft 6-DOF nonlinear model is built. In order to improve the flight control precision and performance, the dynamic inversion control method is used to design the flight control law. Fuzzy adaptive control is combined with the sliding mode control is used to compensate the error of inversion, so the robustness and transient characteristic performance could be improved. The simulation results show that the AAR flight control has excellent control performance.

Abstract: Based on the analysis of the model of the Single-Degree-of-Freedom (SDF) magnetic bearing system, the issue of design and simulation of PD control strategy in the system is investigated. First, the plant model of the AMB (Active Magnetic Bearings) with Single-Degree-of-Freedom (SDF) is found out to be unstable plant. Then, based on the root locus theory and Routh stability criteria, the necessity of derivation action in the controller is analyzed.In addition, the PD control strategy for a particular plant is designed, the effectiveness of which is validated by the given simulation examples. The proposed approach can provide an important reference for the practical application of PD control strategy in the magnetic bearing system.

Abstract: Remote control systems are usually adopted in nuclear facilities inspecting activities due to radioactive environments. Analysis on requirements and structural design are made, and functional modules are described in detail. Remote control software for nuclear equipment inspection is developed with combination of OpenGL 3-dimensional graphics and virtual reality technologies. Operators may try offline simulation before sending commands to control hardware, which improves accuracy and reliability of remote control system.

Abstract: An attitude control system of a spinning spacecraft with internal moving mass is presented in this paper. This system consists of a rigid body and two internal radial moving masses. The mathematical model, including attitude kinematics and nonlinear dynamics equations, is established based on Newtonian mechanics. The control law is designed based on the linear-quadratic-regulator (LQR) theory. The performance of the controller is demonstrated in numerical simulation, and the response shows that the attitude control system is stable and effective.

Abstract: In order to solve the problem of lacking development planning and unclear key development point for the wartime armored equipment autonomic logistic system, components, system structure, system requirements and competence objectives of the system is analyzed. A Quality Function Development model of the planning of maintenance support capability is put forward and solved. The result shows that information support capability, condition monitoring capability and reasoning capability are main influence factors of maintenance support capability of the wartime armored equipment autonomic logistic system.

Abstract: High-accuracy modeling is the key problem of ship deformation measurement based on inertial measuring method. This paper is to find a high-accuracy modeling method based on the ship deformation data measured by optical devices. According to different modeling methods, mathematical models are designed by the analysis of the initial measurement data. Wavelet analysis method is introduced in the process of modeling. Attitude matching method is selected as the simulation algorithm and Kalman filter equations are set up based on the algorithm. Simulation results show that the ship deformation can be represented accurately by mathematical models. The Precision Estimation result is better than 0.4''.

Abstract: The core of fabric defects detection is the collection and processing of fabrics image. A scheme for fabric defect detection based on cross-entropy is proposed in this paper.The crossentropy value illuminates the information difference between the template image and the realtime image on the average.So can take advantage of cross-entropy criteria to use for defect detection and identification. Results have confirmed the usefulness of this scheme for fabric defect detection.

Abstract: In most document management system, all documents are stored in center database server. Actually in daily work, documents uploaded is always need to be stored in the client where the business processes is dealing accordance with the requirements ,but management information system and OA system can not solve this problem. This paper presents a novel framework which integrated the SOA Service of storage to client so called multi process site, to meet the document management requirements that different document processing unit requires document storage is distribution, but the business processes requires centralized.