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2010 Vol. 36, No. 2

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Perspective view of virtualization technologies for avionics system
Zhang Jiong, Lü Zixu, Hu Yanyan, Long Xiang
2010, 36(2): 127-130.
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Abstract:
Virtualization technology was used to achieve the designing of avionics system. Virtual machine system was used to implement a sharing management of hardware resources and to make a partitioned schema for software sub-systems subject to the requirements of ARINC 653, which required that the avionics...
Prediction of aeroengine-s performance parameter combining RBFPN and FAR
Lü Yongle, Lang Rongling, Lu Hui, Tan Zhanzhong
2010, 36(2): 131-134.
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Exhaust gas temperature is one of the performance parameters which reflect aeroengines- running state most efficiently. The prediction analysis of the sequent takeoff exhaust gas temperature margin (EGTM) is helpful to estimate aeroengines- future working performance, which can offer sufficient time...
Numerical simulation of external MHD generator on board reentry vehicles
Chen Gang, Zhang Jinbai, Lee Chun-Hian
2010, 36(2): 135-139.
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Abstract:
A scenario of external magnetohydrodynamic (MHD) generator on board blunt-cone based reentry vehicles was proposed, and numerical parametric studies by employing an MHD model based on the low magnetic Reynolds number approximation were performed. Following the numerical results, the physical feature...
Region-based statistical signal processing scheme for image fusion
Wang Rui, Wang Lin, Yuan Yan
2010, 36(2): 140-144.
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Abstract:
A new image fusion scheme based on region statistical signal processing was proposed. The region growing technique using gray-level clustering was employed to segment the source images into different regions whose borderline represented with crack edge. The registered source images and their segment...
Application of MDO algorithm to multi-tier trajectory optimization design for a surface-to-air missile kinetic kill
Liu Hengjun, Jiang Huan, Chen Wanchun
2010, 36(2): 145-149.
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A multi-tier trajectory optimization framework for a surface-to-air missile to optimize the kill probability was proposed based on the multi-tier optimization process(MTOP). The missile-s intercepting process was divided into three tiers, which were the midcourse trajectory optimization, the termina...
Target threat assessment technology based on cloud model
Ma Shidong, Han Liang, Gong Guanghong, Song Xiao
2010, 36(2): 150-153.
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Abstract:
The accuracy and good characteristic in real-time of target threat assessment have important significance to military campaign simulations. The target threat assessment technology based on cloud model was proposed, and the staff gauge clouds were obtained through Bayes revision on the membership clo...
Numerical simulation of three-dimension mixture gases plume and its effects
Zhang Jianhua, He Bijiao, Cai Guobiao
2010, 36(2): 154-158.
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To simulate actual attitude control thruster plume flow and its effects, the three-dimensional plume effects were studied by the approach which combines difference solution of Navier-Stokes(N-S) equations and the three-dimension mixture gases direct simulation Monte Carlo method(DSMC), according to ...
Boundary sampling and statistical techniques in DSMC method
Hou Fenglong, Cai Guobiao
2010, 36(2): 159-162.
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A boundary sampling technique suitable for three-dimensional DSMC(direct simulation Monte Carlo) calculations was studied, which could be used to give proper entering particle parameters according to the inlet conditions. A new kind of boundary statistical technique was proposed, which could be take...
Mode tracking techniques in flutter analysis
Wu Zhigang, Song Chen, Yang Chao
2010, 36(2): 163-167.
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Abstract:
Flutter solution is an eigenvalue problem which has variable parameters (such as air speed). In flutter mode identification and flutter prevention, the correspondence between the baseline and perturbed eigenvalues due to parameter variation should be determined accurately, and mode crossing should b...
Simulation of helicopter rotor aerodynamic force in conditions of high angle of attack and dynamic stall
Su Yuan, Cao Dong, Cao Yihua
2010, 36(2): 168-171.
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Using Pitt-Peters dynamic inflow model and Wang’s vortex theory, helicopter inflow model was set up. The distribution and magnitude of rotor induced velocity in helicopter maneuvering flight were obtained. According to blade element theory and state-space function, rotor unsteady aerodynamic model w...
Advanced ultra capacitor modeling method and applications
Gai Xiaodong, Yang Shiyan, Lei Lei, Xi Lingling
2010, 36(2): 172-175.
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Abstract:
An ultra capacitor(UC) modeling method based advanced physical terminal behavior was proposed. This model with perfect stable and dynamic characteristics according to the actual physical properties was consisted with three parts of the branch circuits, a voltage controlled voltage source serried by ...
New method for the sensors sensitivity calibration in water-filled tube
Jin Zhongkun, Wang Tongqing
2010, 36(2): 176-179.
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Abstract:
The error brought up by the sensitivity difference of sensors was analyzed in the transfer function measurement using two-sensor method in acoustic tube. Based on the transfer function found from the known reflectance of known interface the ration of sensors sensitivities could be measured, a new me...
Radar altimeter alarm signal testing approach based on data fitting
Wang Weibin, Lu Hui, Lang Rongling
2010, 36(2): 180-183.
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Abstract:
The radar altimeter auto test system and the original test method were introduced, and the disadvantage that this method is inefficient was brought forward. The method of radar altimeter sensitivity testing using dichotomy method, which was used to improve the efficiency of radar altimeter sensitivi...
Risk modeling and entropy decision on large complex project
Ma Liyi, Qiu Wanhua, Yang Yaqin
2010, 36(2): 184-187.
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To solve problems as large scale, complex structure, numerous risks and difficult to make decision of large complex project, the risk decision method was proposed, based on hierarchical modeling, risk filtration, risk ranking and entropy decision. The hierarchical holographic modeling technique was ...
Approach to modeling user interests using conceptual clustering
Liu Yongli, Ouyang Yuanxin, Wen Jia, Xiong Zhang
2010, 36(2): 188-192.
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Abstract:
The exponential increase of internet resources accelerated the development of effective personalization techniques. A new method for modeling user interest, named UIM2C2 (user interest modeling method based on conceptual clustering) was presented. The method analyzed documents that each user ever br...
Extension and improvement for schemes in hypersonic thermal and chemical non-equilibrium flows
Zhou Yu, Yan Chao
2010, 36(2): 193-197.
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Abstract:
Six high accuracy schemes (ROE, MAPS, LDFSS, HLLC, HCUSP and ECUSP) were successfully extended from ideal gas model to thermal and chemical non-equilibrium gas model. All the schemes were analyzed in detail. Some of them were improved by ROE averaging numerical speed. Five species seventeen reaction...
Investigation of aerodynamic characteristics on saucer-shaped lifting-body
Yu Junli, Wang Linlin, Gao Ge
2010, 36(2): 198-201.
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Abstract:
Saucer-shaped aircraft is a new type aircraft configuration with blended fuselage and wing. Through the method of changing centre of gravity, flight stability was acquired and validated in the flight test. A type of fin-shaped wing-tip winglet applied to this aircraft to reduce induced drag was pres...
Moving object detecting technique based on motion vector in H.264 coding
Ding Wenrui, Yang Hua, Liu Chunhui, Jiang Zhe
2010, 36(2): 202-205.
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Abstract:
Considering the applications of joint realization of video compression and moving object tracking,by studying the moving information included in the motion vector of the H.264 video coding international standard and analyzing motion estimation principle, a motion vector based on moving object detect...
Distributed range-free localization algorithm in wireless sensor networks for 3D space
Wang Dehua, Xing Jianping, Zhang Jun
2010, 36(2): 206-209.
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Abstract:
To solve the node localization problem for wireless sensor networks deployed in stereoscopic environments, a novel three-dimensional distributed range-free localization algorithm (3D-DRL) was proposed. Based on the grid-based representation and after voting for each cubic cell, 3D-DRL assumed the ce...
New method of continuous well trajectory measurement
Zhang Yanshun, Wang Yue
2010, 36(2): 210-213.
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Abstract:
To achieve autonomous high-precision well trajectory measurements a well trajectory measurement program based on an improved attitude heading reference system including two gyroscopes and three accelerometers to form inertial measurement unit was proposed. The attitude angles could be gained by the ...
Design of IEEE 1394/GbE conversion system based on SOPC technology
Liu Dong, Jin Huihua, Yan Meng
2010, 36(2): 214-217.
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The achitecture and implementation of an image acquisition system which makes a real-time IEEE 1394/GbE conversion was discussed. The system can transmit the image data from the IEEE 1394-based camera to the Ethernet. System on a programmable chip(SOPC) technology was employed in the design. A Nios ...
Numerical simulation on influencing parameter of micro-blowing technique
Li Jian, Lee Chun-Hian, Jia Liping, Zhen Huaping
2010, 36(2): 218-222.
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Abstract:
Taking micro-porous plates PN3 and PN23 of NASA Glenn Research Center as prototypes, four flat plates made of micro-channels aligning in single-, four-, eight- and sixteen-row patterns were chosen as the numerical models, and parametrical studies on skin friction reduction utilizing micro-blowing th...
Low speed characteristics of the saucer-shaped aircraft
Wang Linlin, Gao Ge
2010, 36(2): 223-226.
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The saucer-shaped aircraft is a novel aircraft adopting blend-wing-body configuration. The wind tunnel experiments, stability analysis and flying tests were conducted to investigate the aerodynamic characteristics and stability features of the saucer-shaped aircraft under low speed conditions. The r...
Numerical simulation and experimental validation on gas jet blowing-off process of submarine emergency
Yang Sheng, Yu Jianzu, Cheng Dong, Gong Shaofeng
2010, 36(2): 227-230.
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Principle tests of submarine emergency gas jet blowing-off process, the small-scale-model of emergency blowing system with gas generator for submerged vehicle, were carried out, which simulated the drainage regularity and the major performance parameters of emergency gas jet blowing-off process whil...
Random network coding based optimal scheme for wireless packet retransmission problems
Gao Zhenguo, Zhao Yunlong, Cai Shaobin, Zhao Jinhua
2010, 36(2): 231-234.
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Abstract:
Network coding (NC) provides a new approach to solve wireless packet retransmission problems (WPRTPs). The property that the number of retransmitted packets of optimal NC-based schemes for a perfect WPRTP (P-WPRTP) equals to the maximum number of requested packets of a receiver was proposed and prov...
Fast method of eliminating extraneous in near filed measurement of calibration load
Yang Shan, Bai Ming, Miao Jungang
2010, 36(2): 235-238.
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A method to analyze and eliminate the extraneous wave from near field measurement of the radiometer temperature calibration load based on fast inverse diffraction algorithm was presented. The inverse diffraction algorithm is used for field reconstruction by calculating the backward propagation of a ...
Analysis of necessary condition for minimal software reliability demonstration test suite
Li Qiuying, Jiang Mengcen
2010, 36(2): 239-243.
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The sample size determination method in statistics was adopted in the software reliability demonstration testing(SRDT). The conception of the necessary condition for minimal software reliability demonstration test suite was proposed. The recommended test case number for the minimal test suite was su...
Laminar-to-turbulent transition onset prediction of hypersonic flows based on laminar kinetic energy equation
Song Bo, Lee Chun-Hian
2010, 36(2): 244-247.
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Onset locations of laminar-to-turbulent transition were predicted for flared-cones with freestream Ma of 5.91 by solving a laminar kinetic energy transport equation based on the linear stability theory numerically. The transitional flowfields were simulated by employing the shear-stress transport(SS...
Local thermal buckling analysis method of combustor liner
Hong Jie, Gao Jinhai, Ma Yanhong, Chen Meng
2010, 36(2): 248-252.
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The discriminant of thin-wall structure thermal buckling instability boundary was derived from governing equations of plates in which the stress function and deflection function are two variables, and the two buckling factors which are local temperature and compressive stress were included in the eq...

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