Advanced Search

2009 Vol. 35, No. 4

  Previous Issue | Next Issue 
Display Method:
Acquisition method of frame head PN mode in DTMB system based on FFT
Li Chunyu, Zhang Xiaolin, Zhang Zhan
2009, 35(4): 393-397.
Abstract References Relative Articles Resource File Access Statistics iconViews $!{v.htmlCount} iconDownload 1299
Abstract:
An acquisition method of frame head pseudorandom noise(PN) mode in digital terrestrial television multimedia broadcast(DTMB) system based on fast fourier transforms(FFT) was proposed according as the analysis of the character of frame head PN in Chinese national standard on DTMB. In this method, fir...
Numerical simulation of film cooling effectiveness on rotating curvature models
Yang Bin, Xu Guoqiang, Meng Henghui, Wu Hong
2009, 35(4): 398-402.
Abstract References Relative Articles Resource File Access Statistics iconViews $!{v.htmlCount} iconDownload 891
Abstract:
Computations were performed to investigate the adiabatic effectiveness η distributions on the curvature turbine blade models under rotating conditions. In the present study, the Reynolds number Re based on mainstream velocity and film hole diameter varies from 3 198.4 to 6 716.6, the blowing ratio M...
Virtual multipath routing for reliable data delivery in wireless sensor networks
Zhang Xia, Zhou Gang, Yu Hongyi
2009, 35(4): 403-406.
Abstract References Relative Articles Resource File Access Statistics iconViews $!{v.htmlCount} iconDownload 937
Abstract:
Aiming at reliable data delivery in wireless sensor networks, VMR(virtual multipath routing) protocol was proposed. It integrated path optimization into data transmission so that data delivery quality was guaranteed at very little control overhead. In this protocol, paths were constructed on demand,...
Failure rate model of components under random repeated load
Wang Zheng, Kang Rui, Xie Liyang
2009, 35(4): 407-410.
Abstract References Relative Articles Resource File Access Statistics iconViews $!{v.htmlCount} iconDownload 1081
Abstract:
The models for calculating the reliability and failure rate of components were developed with the order statistic theory and load-stress interference model when the life of components was measured by the times of random load action. The failure mechanism of components when random load acts for multi...
Theoretical analysis and experimental validation on gas jet blowing-off process of submarine emergency
Yang Sheng, Yu Jianzu, Cheng Dong, Gong Shaofeng
2009, 35(4): 411-416.
Abstract References Relative Articles Resource File Access Statistics iconViews $!{v.htmlCount} iconDownload 1113
Abstract:
By thermodynamics analyzing on the process of gas jet blow-off in the ballast tank, a series of energy equation, quality equation and state equation of the process were established, in considering the evaporation of water circumstances. Therefore the mathematical-and-physical model of the process wa...
Trajectory planning and control for high-dynamic unmanned aerial vehicles
Zhang Qingzhen, Gao Chen, Shi Bobo, Ma Wentao
2009, 35(4): 417-420.
Abstract References Relative Articles Resource File Access Statistics iconViews $!{v.htmlCount} iconDownload 1368
Abstract:
According to the strict aerodynamic heating and force environment, which had the characters of strong uncertainty of flight parameters and structure, the planning and optimization of multi-constraints trajectory were studied for high-dynamic unmanned aerial vehicle (UAV). The attack angle and the ba...
Transient heat transfer model of proton exchange membrane fuel cell stack with internal humidification
Huang Min, Li Xinghu
2009, 35(4): 421-424.
Abstract References Relative Articles Resource File Access Statistics iconViews $!{v.htmlCount} iconDownload 1045
Abstract:
A transient heat transfer model of proton exchange membrane fuel cell (PEMFC) stack with internal humidification,based on mass transportation phenomena in cathode,was developed. Factors affecting the stack temperature were considered. Equations were solved with Runge-Kutta-Felhberg method. Results i...
Mechatronics systems multidisciplinary design heterogeneous information integration
Bi Luyan, Jiao Zongxia, Fan Shengtao
2009, 35(4): 425-428.
Abstract References Relative Articles Resource File Access Statistics iconViews $!{v.htmlCount} iconDownload 839
Abstract:
To implement the heterogeneous information integration of mechatroncis systems multidisciplinary design, a novel information integration framework of mechatronics systems multidisciplinary design was proposed. Furthermore, mechatronics system common information model and generic data access interfac...
Take-off and landing features of flying-wing configuration fighter
Ma Chao, Wang Lixin
2009, 35(4): 429-433.
Abstract References Relative Articles Resource File Access Statistics iconViews $!{v.htmlCount} iconDownload 1763
Abstract:
Innovative control surfaces are implemented on the flying-wing configuration combat aircraft, and the flaps of traditional aircraft which are used for lift increasing during take-off and landing are canceled. The control principles during take-off and landing were summarized. A flying-wing configura...
Registration method based on ICP algorithm for 3D surgical navigation
Wang Junchen, Wang Tianmiao, Xu Yuan, Fang Liming
2009, 35(4): 434-438.
Abstract References Relative Articles Resource File Access Statistics iconViews $!{v.htmlCount} iconDownload 2896
Abstract:
Registration between medical images and physical space is an important procedure in 3D surgical navigation systems. A registration method based on ICP (iterative closest point) algorithm was presented. Two point sets, one of which is acquired from physical space by the optical localizer and the othe...
Frequency characteristics of breakdown vortices over delta wings with small amplitude oscillation at the high angle of attack
Zhang Minglu, Liu Shaohui, Lü Zhiyong
2009, 35(4): 439-443.
Abstract References Relative Articles Resource File Access Statistics iconViews $!{v.htmlCount} iconDownload 874
Abstract:
Experiments of dynamic unsteady pressure measurement and hot film velocity measurement with the small amplitude oscillation delta wings were carried out in a water channel and a wind tunnel respectively in order to investigate the influence of the nondimensional oscillation frequency n on the freque...
Robust adaptive control scheme for uncertain switched systems
Hou Yanze, Dong Chaoyang, Wang Qing, Deng Wuyan
2009, 35(4): 444-448.
Abstract References Relative Articles Resource File Access Statistics iconViews $!{v.htmlCount} iconDownload 1453
Abstract:
For a class of uncertain switched linear systems, based on multiple Lyapunov functions method and model reference adaptive control theory, a robust adaptive switching control scheme with controller having nonlinear deadzone character was proposed, on which the switching law evolves according to the ...
Packet scheduling for AFDX switch under hard time constraints
Zhou Qiang, Xiong Huagang, Zhang Xiaolin, Zhang Yanzhong
2009, 35(4): 449-452.
Abstract References Relative Articles Resource File Access Statistics iconViews $!{v.htmlCount} iconDownload 1487
Abstract:
AFDX(avionics full duplex switched Ethernet) is a switched interconnection designed to meet requirements related to the ever increasing demand for civil aircraft such as A380. A packet scheduling scheme on hard real-time performance in AFDX switch was studied. Based on the dual-priority-message sche...
Electromagnetic occultation algorithm based on facets grouping and optimization
Ji Jinzu, Liu Zhanhe
2009, 35(4): 453-456.
Abstract References Relative Articles Resource File Access Statistics iconViews $!{v.htmlCount} iconDownload 1306
Abstract:
When calculating complex target-s radar cross section(RCS) with physical optics(PO) method, the facets shadowing relationship was judged through overlapping and depth-of-view of facets along the incident wave direction. The facets were projected on the plane that was perpendicular with the incident ...
Different kinematics modeling method and analyzing of new lunar rover with eight wheels
Yu Xinyi, Gao Haibo, Deng Zongquan
2009, 35(4): 457-463.
Abstract References Relative Articles Resource File Access Statistics iconViews $!{v.htmlCount} iconDownload 978
Abstract:
In order to improve lunar rover-s autonomous navigation, path planning and simulation of trafficability in rough terrain, different kinematics models should be made. A new type of lunar rover was presented and three different kinematics models were made based on rover-s mechanical characterization a...
Failure risk analysis for fracture critical aero-engine components
Du Shaohui, Hong jie, Xie Liyang
2009, 35(4): 464-467.
Abstract References Relative Articles Resource File Access Statistics iconViews $!{v.htmlCount} iconDownload 949
Abstract:
Accroding to the newly certification specifications and standard for engines, safety analysis for aero-engine critical parts such as disks must be done. The ultimate objective of a safety analysis is to ensure that the risk to the aircraft from all engine failure conditions is acceptably low. The fa...
Rapid wing structure design and automated scheme adjustment for civil aircraft
Luo Mingqiang, Feng Haocheng, Liu Hu, Wu Zhe
2009, 35(4): 468-471.
Abstract References Relative Articles Resource File Access Statistics iconViews $!{v.htmlCount} iconDownload 22739
Abstract:
In order to improve the quality and efficiency of civil aircraft conceptual/preliminary design, the implementation of wing structure and associated fuel tank design in a computer aided aircraft conceptual/preliminary design system were studied. The coordinate of wing-like components was defined. The...
Diagnostic Bayesian networks modeling based on multi-signal flow graphs
Dai Jing, Yu Jinsong, Zhang Ping, Li Xingshan
2009, 35(4): 472-475.
Abstract References Relative Articles Resource File Access Statistics iconViews $!{v.htmlCount} iconDownload 911
Abstract:
The similarities and differences between multi-signal flow graphs and Bayesian networks were analysed, which show that the conversion of multi-signal flow graphs to Bayesian networks is feasible. A diagnostic Bayesian networks modeling method was proposed based on multi-signal flow graphs in order t...
Time-optimal fuel-fixed orbital rendezvous with multiple impulses
Liu Tao, Zhao Yushan
2009, 35(4): 476-479.
Abstract References Relative Articles Resource File Access Statistics iconViews $!{v.htmlCount} iconDownload 985
Abstract:
Minimum-time, impulsive, fuel-fixed orbital rendezvous problem with path constraints was modeled and saluted with genetic algorithms. For several initial phase angles of the target relative to the vehicle, optimal solutions were obtained for a range of fixed-fuel consumptions and terminal radius, be...
Ultra-low voltage ultra-low power NMOS bulk-biased mixer
Song Dan, Zhang Xiaolin
2009, 35(4): 480-484.
Abstract References Relative Articles Resource File Access Statistics iconViews $!{v.htmlCount} iconDownload 960
Abstract:
By using two pairs of NMOSs and the bulk-biased technology, an ultra-low voltage ultra-low power NMOS bulk-biased mixer (NBBM), applied to some satellite navigation dual-system compatible receiver, was implemented in SMIC 0.18 μm CMOS process. The GPS system was included: the frequency of the radio...
Design of power/ground distribution network for transmitter of digital terrestrial television multimedia broadcast
Zhang Shuai, Zhang Xiaolin, Zhang Zhan, Su Linlin
2009, 35(4): 485-488.
Abstract References Relative Articles Resource File Access Statistics iconViews $!{v.htmlCount} iconDownload 1052
Abstract:
The influencing factors and the reason of IR-drop and electromigration were analysed. Taking the design of power/ground distribution network for transmitter of digital terrestrial television multimedia broadcast for an example, power/ground distribution network which ensured the normal operation in ...
Service-oriented integration of coordination logic in air combat simulation
Yan Bin, Zhang Shuguang, Sun Jinbiao
2009, 35(4): 489-492.
Abstract References Relative Articles Resource File Access Statistics iconViews $!{v.htmlCount} iconDownload 1006
Abstract:
The importance of system agility in simulation has been widely realized and understood. However, the current architecture of coordination logic in aerial warfare simulation is central "single layered", while it has total control over coordination process, but solidifies the coordination logic in the...
Virtual modeling and rendering technologies of high-seas environment
Yang Xinying, Gong Guanghong, Zhang Bo, Huang Zhanpeng
2009, 35(4): 493-496.
Abstract References Relative Articles Resource File Access Statistics iconViews $!{v.htmlCount} iconDownload 923
Abstract:
A real-time linear accumulation ocean wave spectrum algorithm was adjusted by disturbing weighted phasic and amplitude factors which meliorated the defective smooth figure of billows and stormy waves. Base on the synthetic natural environment (SNE) information such as stormy level, wind level, equal...
Design method of soil stabilizer produced with industrial waste
Li Zhanguo, Zhao Yongsheng, Huang Xin
2009, 35(4): 497-500.
Abstract References Relative Articles Resource File Access Statistics iconViews $!{v.htmlCount} iconDownload 850
Abstract:
Such problems were discussed as the influence of chemical factors in soil on hydrates growing in stabilized soil and the countermeasure to eliminate the influence, the system character of hydrates to form optimal stabilized soil structure, the concordance of growing process between cementitious hydr...
Numerical analysis on travelability of lunar soil simulant by means of distinct element method
Gao Feng, Li Wen, Sun Gang, Sun Peng
2009, 35(4): 501-504.
Abstract References Relative Articles Resource File Access Statistics iconViews $!{v.htmlCount} iconDownload 1210
Abstract:
The geometric model of lunar simulant particles was built based on its scanning electron microscopic-photograph(SEM), and a producing strategy for irregular-shape particle assembly was presented. A simplified contact reaction model of lunar particles was created. The relationship between soil macro-...
Dynamic properties of noise barrier structure subjected to train-induced impulsive wind pressure
Zhao Libin, Long Liping, Cai Qingyun
2009, 35(4): 505-508.
Abstract References Relative Articles Resource File Access Statistics iconViews $!{v.htmlCount} iconDownload 925
Abstract:
According to noise barrier design scheme of special railways for passenger transportation from Beijing to Tianjin, the finite element model of noise barrier was established based on the general software ANSYS. The natural frequency of noise barrier structure was detailedly researched and a practical...
Activity-centered equipment support system analysis method
Guo Linhan, Kang Rui, Zhang Zhenying
2009, 35(4): 509-513.
Abstract References Relative Articles Resource File Access Statistics iconViews $!{v.htmlCount} iconDownload 1445
Abstract:
Equipment logistics support activities analysis mythology was presented according to operation and maintenance tasks analysis (O&MTA) output outcomes and process model describing equipment logistics support system implementing mechanisms. Equipment logistics support activities frequency and exec...
Nonliearity compensation for pseudolite/INS integrated navigation
Wang Wei, Liu Zongyu
2009, 35(4): 514-518.
Abstract References Relative Articles Resource File Access Statistics iconViews $!{v.htmlCount} iconDownload 1068
Abstract:
Pseudolite-based positioning systems have a bright outlook in providing users higher precision navigation information due to the stronger anti-jamming capability and flexibility compared with orbiting satellites. A nonliearity compensation algorithm was studied for the pseudolite/inertial navigation...

Copyright © Journal of Beijing University of Aeronautics and Astronautics

Address: Editorial Department of Journal of Beijing University of Aeronautics and Astronautics, 37 Xueyuan Road, Haidian District, Beijing Post Code: 100191 Email: jbuaa@buaa.edu.cn

Supported by: Beijing Renhe Information Technology Co., Ltd.