Institute of Spacecraft System Engineering CAST

Beijing, China

Institute of Spacecraft System Engineering CAST

Beijing, China

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Yan D.,Institute of Spacecraft System Engineering CAST | Guo J.,Institute of Spacecraft System Engineering CAST | Wang L.,Institute of Spacecraft System Engineering CAST | Zhan P.,Institute of Spacecraft System Engineering CAST
International Conference on Signal Processing Proceedings, ICSP | Year: 2017

Satellite network has the advantage of global coverage and simple access, so it is considered to be an important part of next generation Internet. In this paper, we propose a network status adaptive QoS dynamic routing algorithm for satellite networks, which is called SADR. It uses heuristic techniques to do the task of dynamic routes searching, routing tables updating and maintaining. In the condition of topology and network status changing, SADR can ensure the path in the routing tables to be alive and effective. SADR improves the heuristic algorithm to fit satellite network. In the end, the performances of end-to-end QoS status and delay are evaluated by simulations. © 2016 IEEE.


Wang P.D.,Beihang University | Zhang J.-G.,Beihang University | Sun J.Y.,Beihang University | Tan C.L.,Institute of Spacecraft System Engineering CAST | Liu Y.Q.,Institute of Spacecraft System Engineering CAST
Risk, Reliability and Safety: Innovating Theory and Practice - Proceedings of the 26th European Safety and Reliability Conference, ESREL 2016 | Year: 2017

Space mechanisms have become complex mechatronic system. Cascading and coupling reliability prob-lems of space mechanisms have been more complex and cannot match the assumptions of static state, independence and large samples of traditional reliability theory with prominent characters of multi-factor, multi-level and incomplete information (hybrid uncertainty). (M.Y.Li, 2014). © 2017 Taylor & Francis Group, London.


Tan C.L.,Institute of Spacecraft system engineering CAST | Liu Y.Q.,Institute of Spacecraft system engineering CAST | Zhang J.-G.,Beihang University | Sun J.Y.,Beihang University | Wang P.D.,Beihang University
Risk, Reliability and Safety: Innovating Theory and Practice - Proceedings of the 26th European Safety and Reliability Conference, ESREL 2016 | Year: 2017

Space manipulator is the essential technology tool of assemble, management, maintain and space application in space station, which is significant to construction of the space station. The components of them become more complicated according to diversified function and the interaction with others (A. Urbina, 2011). In this kind of system many factors simultaneously influence the system to determine the state of operation. There are cascading and coupling effects among some reliability influence factors with many uncertainties or imperfect information caused by inherent variability in materials, environments, etc. which influence system performance and reliability. However the relationship between various factors is usually imperfect and the information is unclear, incomplete and uncertain because of the feature of complexity, coupling and cascading (C.L. Tan 2014). Moreover, full scale testing is currently not feasible for space manipulator under actual use environments, some limited testing is often available for components, subsystems (i.e. groups of components) and a very limited number of tests of the full system in other use environments(A. Urbina, 2011). However a large amount of information on the uncertainty is required to construct precise distributions for imprecise parameters, which, unfortunately, are not always available or sometimes very expensive to obtain (C. Jiang, 2013), traditional multivariate statistical methods could have a hard time obtaining a persuasive explanation. As a result, a new analysis method needs to be located. © 2017 Taylor & Francis Group, London.


Zhang Y.,Institute of Spacecraft System Engineering CAST | Wei E.,Harbin Institute of Technology | Yin J.,Institute of Spacecraft System Engineering CAST | Huang L.,Institute of Spacecraft System Engineering CAST
Springer Proceedings in Physics | Year: 2017

High resolution remote sensing satellite can apply into mineral monitoring, but quantity of Chinese civil remote sensing satellites on orbit is limited. For analysing the ability and exploring the deficiency of satellites system, and improving the satellite system efficiency in mineral monitoring task, a simulation method of mineral monitoring with remote sensing satellites is proposed. Firstly the task demand analysis of mineral monitoring is developed, which is including the key observe areas and the payload parameters such as spectrum, resolution, and breadth and so on. Secondly, the satellites which can satisfy the task demand are selected, and base on the selected satellites system to build the simulation models. Thirdly, the task planning and scheduling methods is used to achieve the optimize simulation results. Finally the demand satisfaction of satellite system is assessed and the system efficiency is analysed. In this chapter, the simulation results is the parameters such as revisit time, covering time and continuous observation time of key observation areas. These parameters can be transformed to indicators which can reflect the satellite effectiveness. The contribution ratio of a single satellite to the whole satellite system is calculated and the satellite effectiveness is quantified, so the different kinds of satellites in the system can be compared with, meanwhile, the suggestion which can maximize satellites system effectiveness is provided specifically. Through the research on simulation method of mineral monitoring with remote sense satellites, the deficiency of remote sense payload and satellite system is recognized, which can provide the reference and suggestion for building optimization remote sense payload and satellite system in mineral monitoring application. © Springer International Publishing AG 2017.


Xiong X.,Institute of Spacecraft System Engineering CAST | Wang J.,Institute of Spacecraft System Engineering CAST | Zhang P.,Beihang University
Safety and Reliability of Complex Engineered Systems - Proceedings of the 25th European Safety and Reliability Conference, ESREL 2015 | Year: 2015

A new method of failure detection for damaged or floating control surface is proposed, which is only based on the information of electric actuator, avoiding the combined effects caused by the concurrent failure of control surfaces. By constructing the model of actuator system and observing the characteristics of internal physical parameters of actuator under floating/damage failure, the relationship between actuator’s armature current and the failure mode is found and the judgment theorem is given. The feasibility of the proposed method is verified by simulation example. The comparison of performance between the proposed method and the traditional FDI (failure detection and identification) method (Filter Method) on detecting concurrent failure of control surfaces is showed. The results suggest that the proposed failure detection method is efficient and accurate in detecting and locating the failure regardless of whether or not the system noise is considered. This method is independent from the complexity of the flight control system since it is only based on single electric actuator. Therefore it could be used for both linear system and nonlinear system. The proposed failure detection method is efficient and applicable in realistic engineering scenario. © 2015 Taylor & Francis Group, London.


Shi W.J.,Institute of Spacecraft System Engineering CAST | Zhang Y.B.,Beihang University | Hu W.P.,Beihang University
Advanced Materials Research | Year: 2013

In this paper, a fatigue life prediction method for fiber reinforced polymer composite lamina is proposed. Based on two independent introduced damage variables, the damage degree of fiber and the damage degree of matrix, the issue of lamina fatigue is transformed into the study of damage evolution for fiber and matrix. Subsequently, the damage driving force and the damage evolution equations for the fiber and the matrix are constructed, respectively. Then, a novel parameter identified method is conducted. Finally, with the failure criterion for the lamina presented, the fatigue life prediction method of the composite lamina is proposed. © (2013) Trans Tech Publications, Switzerland.


Zhang Z.,Institute of Spacecraft System Engineering CAST | Wang J.,Institute of Spacecraft System Engineering CAST | Li L.,Institute of Spacecraft System Engineering CAST | Cheng Z.,Institute of Spacecraft System Engineering CAST
Safety and Reliability of Complex Engineered Systems - Proceedings of the 25th European Safety and Reliability Conference, ESREL 2015 | Year: 2015

Satellite orbit insertion and attitude establishment process is the pivotal condition of mission success, and the mission risk of which is also the focus of engineering. To identify the mission risk eff ectively and evaluate it quantitatively, the risk analysis based on PRA has been carried out during the process of the product development through MLD, FMEA, ESD, ETA and FTA. The methods of identifying the satellite initiating events and the reliability data collecting, processing of satellite products are given, which provide the reference and basis for the further applications of the satellite PRA. © 2015 Taylor & Francis Group, London.


Zhang Y.-T.,Institute of Spacecraft System Engineering CAST | Cai Z.,Ministry of Industry and Information Technology Software and Integrated Circuit Promotion Center | Liu S.,Harbin Engineering University
Dianbo Kexue Xuebao/Chinese Journal of Radio Science | Year: 2011

Aiming at the propagation characteristics of electromagnetic waves in loss media, a modified alternative direction implicit finite difference time domain (ADI-FDTD) method is proposed to solve the problem. The modified method can improve the disadvantage of the traditional ADI-FDTD method, which improves the computational efficiency on the cost of accuracy. The unconditional stability of the algorithm is proved, while the numerical dispersion is also analyzed. The algorithm is validated effectively, and it could also improve computational accuracy, which has been proved by examples comparison. The algorithm is applied to analyze the scattering of a metal sphere in air, on the bottom of ground and sea. The simulation shows that the amplitude and oscillation of the scattering increase in the loss media. Copyright © 2011 by Editorial Department of Chinese Journal of Radio Science.


Yuan B.F.,Institute of Spacecraft System Engineering CAST | Gao S.,Institute of Spacecraft System Engineering CAST | Li X.,Institute of Spacecraft System Engineering CAST
Applied Mechanics and Materials | Year: 2014

The joint-locking device is an important component used to lock some equipments in the satellite. In this paper, a joint-locking device is designed to lock the deployable equipment in the satellite. The working principle of its locking mechanism is analyzed, exhibiting such characteristics as light weight, small dimensions and strong locking ability. Thermal deformation analysis on the joint-locking device is conducted using finite element method. The simulation results show that the joint-locking device possesses high thermal stability and can meet design requirements. © (2014) Trans Tech Publications, Switzerland.


Yan D.,Institute of Spacecraft System Engineering CAST | Wang L.,Institute of Spacecraft System Engineering CAST
ICEIEC 2015 - Proceedings of 2015 IEEE 5th International Conference on Electronics Information and Emergency Communication | Year: 2015

Satellite network has the advantage of global coverage and simple access, so it is considered to be an important part of next generation Internet. In this paper, we propose a novel traffic prediction based dynamic routing technique for double-layered satellite networks, which is called TPDR. It has a double-layered structure, which is composed of LEO layer and GEO layer. TPDR supports new nodes to join the network, and prevent the manager nodes from becoming overloaded based on traffic prediction. In the end, the performances of end-to end delay and manager packet loss rate are evaluated by simulations. © 2015 IEEE.

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