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2015 Vol. 41, No. 6

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Volume 41 Issue62015
2015 Year 41 Volume 6 Issue E-journal
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Strategies for reconciling tradeoff between conductivity and swelling in alkaline polymer electrolytes membrane
XIANG Yan, SI Jiangju
2015, 41(6): 961-968. doi: 10.13700/j.bh.1001-5965.2015.0174
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Alkaline polymer electrolytes membrane fuel cells (APEMFC) have been investigated as an alternative to proton-exchange membrane fuel cells (PEMFC) because of their compatibility with nonprecious-metal catalyst, favorability toward fuel oxidation, together with the lower cost, where the charge carrie...
3D thermal deformation measurement of superalloy honeycomb panels in time-varying thermal radiation environment
PAN Bing, JIANG Tianyun, WU Dafang
2015, 41(6): 969-975. doi: 10.13700/j.bh.1001-5965.2014.0391
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Superalloy honeycomb panels with the advantages of light weight, high strength and excellent heat-shielding properties have been widely used in the field of aeronautics and astronautics. Deformation measurement of superalloy honeycomb panels due to transient thermal loading is essential for the desi...
Discrete element simulation of mechanical characteristics of sands under principal stress axes rotation
TONG Zhaoxia, WANG Bo, ZUO Zhaokun, YAO Yangping
2015, 41(6): 976-981. doi: 10.13700/j.bh.1001-5965.2014.0434
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The mechanical behavior of sands and other granular materials subjected to rotation of principal stress axes is significantly dependent on the micro fabric properties and their evolution. The discrete element simulation for sands under cyclic rotation of principal stress axes was validated by compar...
Head bone tissue extraction algorithm based on CTA image
CAO Chunhong, AI Liang, XU Guangxing
2015, 41(6): 982-988. doi: 10.13700/j.bh.1001-5965.2014.0502
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Vascular tissue and bone tissue cannot be clearly separated based solely on grayscale information in images of computed tomography angiography (CTA). The algorithm based on the growth of three-dimensional (3D) region improved bone tissue outside the bone contour extraction and the extraction algorit...
Pedal simulator and braking feel evaluation in brake by wire system
JI Fenzhu, ZHOU Xiaoxu, ZHU Wenbo
2015, 41(6): 989-994. doi: 10.13700/j.bh.1001-5965.2014.0067
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The pedal characteristic from experiments for target, a pedal simulator with elastic components and hydraulic unit as the basic simulation unit was designed, which based on the analysis on the pedal characteristics in traditional hydraulic braking system. The "breaking feeling" evaluation index was ...
New control technology for visible light reflection characteristics of space target
HUANG Chen, WANG Jianjun, XUE Li, GAO Xin, SONG Ping
2015, 41(6): 995-999. doi: 10.13700/j.bh.1001-5965.2014.0422
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For geosynchronous (GEO) orbit space object's detection and recognition is mainly dependent on analysis, identification and judgment of reflected sunlight photometric curve. Based on analysis of visible light reflection characteristics calculation model of space target surface diffuse reflection pro...
Ultrasonic phased array inspection of L-shaped components based on dynamic aperture focusing
XU Na, HE Fangcheng, ZHOU Zhenggan
2015, 41(6): 1000-1006. doi: 10.13700/j.bh.1001-5965.2014.0519
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When L-shaped component is detected by ultrasonic phased array inspection technique based on total focusing method, wave propagation path in the specimen became more complex to increase the computational difficulty of propagation time due to the complicated geometries of component. To solve this pro...
K-π interaction in finite volume and the K* resonance
ZHOU Dan, CUI Erliang, CHEN Huaxing, GENG Lisheng, SHEN Chengping
2015, 41(6): 1007-1011. doi: 10.13700/j.bh.1001-5965.2014.0411
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Firstly, the K-π interaction in P-wave in a finite volume using the chiral unitary approach was studied, to find an efficient strategy to obtain K-π phase shifts and thus the K* meson properties from energy levels could be obtained in lattice calculations. This method has been applied to provide K-π...
Comprehensive evaluation model of multidimensional visual coding on display interface
XIAO Xu, WANYAN Xiaoru, ZHUANG Damin
2015, 41(6): 1012-1018. doi: 10.13700/j.bh.1001-5965.2014.0428
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To predict and evaluate the effects of multidimensional visual coding on pilot's information identification, a new comprehensive evaluation mathematical model of multidimensional visual coding on display interface, which adopted meta-analyses and integrated performance values (IPVs) for the unitary ...
Swing motion control of lower extremity exoskeleton based on admittance method
LIU Difei, TANG Zhiyong, PEI Zhongcai
2015, 41(6): 1019-1025. doi: 10.13700/j.bh.1001-5965.2014.0462
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To solve the problem of the pilot motion intent's identification and tracking during the swing motion of lower extremity exoskeleton, a control algorithm based on admittance method was proposed at first. This control method used the admittance characteristics between the force and velocity of moving...
Robust trajectory tracking for quadrotor aircraft based on ADRC attitude decoupling control
YANG Liben, ZHANG Weiguo, HUANG Degang
2015, 41(6): 1026-1033. doi: 10.13700/j.bh.1001-5965.2014.0392
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An attitude decoupling algorithm based on active disturbance rejection control (ADRC) was designed for underactuated quadrotor aircraft. The algorithm can overcome some shortcomings of traditional control method for underactuated quadrotor, such as strong coupling between system states, weak anti-in...
Optimization of carrier-based aircraft repairable spares inventory systems under limited maintenance ability
ZHANG Shuai, LI Junliang, LYU Weimin, TENG Kenan
2015, 41(6): 1034-1041. doi: 10.13700/j.bh.1001-5965.2014.0393
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The repair capability of carrier-based aircraft is constrained by finite repair channels. To make Palm's theorem and Metric theory applicable to the optimal allocation of carrier-base aircraft repairable spares, the modified accommodative models of repair and supply channels under conditions of dedi...
Topology optimization for periodic thermal conductive material using SIMP method
JIA Jiao, CHENG Wei, LONG Kai
2015, 41(6): 1042-1048. doi: 10.13700/j.bh.1001-5965.2014.0401
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In order to obtain periodic material microstructure under macroscopic thermal conduction condition, the optimal topological model of periodic structure was built by solid isotropic material with penalization (SIMP) method. The volume fraction was referred as constraint and minimized thermal complian...
Conduction mechanism analysis of modified polyimide composite
LEI Weiqun, WU Jiang, PENG Ping, YANG Pei, ZHENG Xiaoquan
2015, 41(6): 1049-1054. doi: 10.13700/j.bh.1001-5965.2014.0427
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Firstly, semi-conductive granules in different diameters from nanometer to micron were used to modify polyimide resin that strengthened by glass fabric. Four kinds of polyimide resin with non-alkalis glass fibers were produced, including the original, micro-filler, nano-filler, and micro/nano-filler...
Effects of distributed propulsion crucial variables on aerodynamic performance of blended wing body aircraft
YAN Wanfang, WU Jianghao, ZHANG Yanlai
2015, 41(6): 1055-1065. doi: 10.13700/j.bh.1001-5965.2014.0390
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Based on a 350-passenger blended wing body (BWB) integrated aircraft with a distributed propulsion system, effects of crucial design variables of distributed propulsion on aerodynamic performances of the aircraft are studied by a computational fluid dynamics method. It is shown that the effect of th...
Progressive damage analysis of open-hole composite laminates under compression load
ZHOU Rui, GUAN Zhidong, LI Xing, ZHUO Yue
2015, 41(6): 1066-1072. doi: 10.13700/j.bh.1001-5965.2014.0395
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Firstly, compressional experiments were conducted on open-hole composite laminates. The progressive damage during the loading process and the final damage mode of the specimen were detected with a digital microscope, scanning electron miroscope and an X-scan equipment. Damage initiation and delamina...
Numerical simulation of lateral control in supersonic cross jet flow
LI Yachao, YAN Chao, ZHANG Xiang, MENG Jun
2015, 41(6): 1073-1079. doi: 10.13700/j.bh.1001-5965.2014.0398
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To investigate the effect of angle of attack and jet position on the lateral control force in the cross jet flow, the paper firstly simulated the supersonic cross jet flow by the numerical methods. The calculated longitudinal wall pressure distribution agreed well with the experimental results. Jet ...
Fault case information extraction method research based on ontology
KE Qianyun, LI Qing, SUN Yong
2015, 41(6): 1080-1086. doi: 10.13700/j.bh.1001-5965.2014.0419
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To solve the accumulation and reusing problems of fault case knowledge that are described as unstructured and unnormalized information in the current maintenance support activities of aircraft, research on the knowledge representation and information extraction method of aircraft fault case was carr...
Video avatar-based remote video collaboration
LIU Siqi, YU Chun, SHI Yuanchun
2015, 41(6): 1087-1094. doi: 10.13700/j.bh.1001-5965.2014.0532
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Most existing remote video communication systems are confined to how to accurately deliver adequate information in real time, but lose sight of communicators' interaction demands. Meanwhile, traditional 2D-based video communications cannot make full use of people's 3D information, which shows great ...
Evaluation method for radar anti-stealth performance based on evidence fusion
SHI Junpeng, HU Guoping, WANG Xin
2015, 41(6): 1095-1101. doi: 10.13700/j.bh.1001-5965.2014.0388
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Aiming at the phenomenon of complicated process and imperfect algorithm in the evaluation of radar anti-stealth performance, a new method for the evaluation based on improved evidence theory was presented. Firstly, to overcome the shortcomings of strong subjectivity and weak correlation, the credibi...
Design of constant current source to drive analog coil of space magnetic environment
ZHANG Pengfei, QI Bojin, ZHENG Minxin, ZHANG Wei
2015, 41(6): 1102-1107. doi: 10.13700/j.bh.1001-5965.2014.0403
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To reach the requirements that the space environment simulation coil's magnetic induction intensity can continuously adjust from 0 to 20 Gs, and the magnetic field stability can be better than 1%, main circuit topology structure using a voltage source in series with a current source, combined with t...
Aerodynamic and overall parameters analysis of buoyancy-lifting hybrid airship
MI Panpan, MENG Junhui, LYU Mingyun
2015, 41(6): 1108-1116. doi: 10.13700/j.bh.1001-5965.2014.0404
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In order to balance the aerodynamic performance and buoyancy-lifting characteristics of airship, to make full use of their advantages and to strengthen the controllability, a hybrid airship configuration which has combined envelopes that are based on high lift NACA airfoil was proposed. With computa...
Effect of swirl cup's primary swirl number on ignition performance
LIU Guigui, LIN Yuzhen, HU Haosheng, WANG Xiaofeng, ZHANG Chi
2015, 41(6): 1117-1121. doi: 10.13700/j.bh.1001-5965.2014.0408
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All swirl cups have the same primary inclined multi hole and secondary radial straight blade and a simplex pressure atomizer. The effects of primary swirl number of airblast atomizer on small combustion ignition performance were examined. The ignition experiments for swirl cups with three different ...
Human action recognition based on locality-constrained linear coding
BAI Chen, SUN Junhua
2015, 41(6): 1122-1127. doi: 10.13700/j.bh.1001-5965.2014.0414
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Large intra-class variations of action features lead to low classification accuracy of action recognition, on the other hand, current algorithms exist drawbacks in computational complexity and extension of recognizable action classes. A method based on locality-constrained linear coding (LLC) for ac...
Adaptive backstepping control of a nonlinear aeroelastic system
LIU Songdan, LI Daochun, XIANG Jinwu
2015, 41(6): 1128-1134. doi: 10.13700/j.bh.1001-5965.2014.0423
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For a two-dimensional airfoil with leading-edge and trailing-edge control surfaces, the nonlinear aeroelastic equations under the supposition of quasi-steady aerodynamic forces were established and were described in state space form. The control variables of the leading and trailing edges were coupl...
Modeling and analysis of gyroscope's random drift based on GP+GA method
LYU Lin, QUAN Wei
2015, 41(6): 1135-1140. doi: 10.13700/j.bh.1001-5965.2014.0440
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Gyroscope is the key component in an inertial navigation system (INS). It depends on the precision of the INS. In order to improve the gyro's operational accuracy and compensate the random error caused by the nonlinear and weak-stability characteristic of gyro's random drift, the nonlinear random dr...
Angle of repose and contact-force distribution in granular pile under variable g
CHEN Hui, ZHAO Xianqiong, LIU Yilun
2015, 41(6): 1141-1146. doi: 10.13700/j.bh.1001-5965.2014.0468
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Taking the discontinuity and random character of granular system into account, a kinematic model of particles was established by three-dimensional discrete element method in order to investigate the relationship between angle of repose and gravity. Accumulation process of granular pile was simulated...
Learning based intelligent image retargeting technique
LI Ke, YANG Yizhen, YAN Bo
2015, 41(6): 1147-1154. doi: 10.13700/j.bh.1001-5965.2014.0473
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There has been a wide range of image retargeting (IR) approaches, in order to solve the problem of adapting images to different display resolutions. A fast image retargeting method was proposed, which was based on image columns. Firstly, the method would calculate a saliency map of the original imag...

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