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2015 Vol. 41, No. 3

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Volume 41 Issue32015
2015 Year 41 Volume 3 Issue E-journal
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Approximate calculation method of buckling load on integral sub-stiffened panel
XU Yuanming, LI Songze
2015, 41(3): 369-374. doi: 10.13700/j.bh.1001-5965.2014.0240
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Abstract:
To calculate the integral sub-stiffened panel buckling load in the preliminary design stage quickly, a simplifying approximate calculation method based on some reasonable assumptions was proposed. The perfect rectangular sub-stiffened panel simply supported on four sizes was used as investigation ob...
FPGA hardware implementation of the LZMA compression algorithm
LI Bing, ZHANG Lin, LIU Yong
2015, 41(3): 375-382. doi: 10.13700/j.bh.1001-5965.2014.0169
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Abstract:
Software-based LZMA (Lempel Ziv Markov-chain algorithm) nondestructive compression algorithm is very slow and consumes too much CPU (central processing unit) resources during the data compression process, as a result it can not meet the requirements of real-time systems. On the basis of the improved...
Building areas extraction basing on MSER in unmanned aerial vehicle images
DING Wenrui, KANG Chuanbo, LI Hongguang, LIU Shuo
2015, 41(3): 383-390. doi: 10.13700/j.bh.1001-5965.2014.0177
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Abstract:
Automatic detection and extraction of the building area is an important aspect of unmanned aerial vehicle (UAV) image processing. Based on the detailed analysis of UAV imaging characteristics and the maximum stable extremal regions (MSER) algorithm, a building area extraction algorithm of UAV image ...
Simulink model testing method based on program mutation
ZHOU Yibin, YIN Yongfeng, LI Xiaodan, WANG Mingwei
2015, 41(3): 391-397. doi: 10.13700/j.bh.1001-5965.2014.0211
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In order to solve the current problems (expensive testing cost and low efficiency of test case generation) in mutation test for Simulink models, a mutation testing process and an optimized set of mutation operators were proposed for Simulink models based on program mutation according to the current ...
Autonomous mobile drilling mechanism with metamorphic function
WANG Min, WANG Xiemiao, CHEN Wenliang, DING Liping
2015, 41(3): 398-404. doi: 10.13700/j.bh.1001-5965.2014.0242
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Abstract:
According to the application requirements of aircraft automatic assembly and the principle of metamorphic mechanism, a double eccentric source metamorphic mechanism was presented. On the basis, a autonomous mobile drilling mechanism with metamorphic function was designed, and the switching of changi...
Influence factors analysis on wear of hydraulic axial piston pump/slipper pair
MA Jiming, LI Qilin, REN Chunyu, CHEN Juan
2015, 41(3): 405-410. doi: 10.13700/j.bh.1001-5965.2014.0204
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Abstract:
Wear of swash plate-slipper moving pair (slipper pair) of hydraulic axial piston pump results in increasing leakage, declining efficiency, and finally shorting the lifetime. An accelerated lifetime test method was presented based on the elasto hydrodynamic lubrication (EHL) wear model. As the most i...
Calibration method of robot base frame by quaternion form
WANG Wei, LIU Lidong, WANG Gang, YUN Chao
2015, 41(3): 411-417. doi: 10.13700/j.bh.1001-5965.2014.0239
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The accuracy pose of robot base frame with respect to the world frame needs to be calibrated under the task of multi-arm cooperation, identification of kinematics parameter and off-line program of robot. An accurately calibration method of robot base frame using quaternion form was proposed and appl...
Performance analysis and parameter setting for Tong detection algorithm
ZHU Yunlong, CHOU Wusheng, YANG Dongkai
2015, 41(3): 418-423. doi: 10.13700/j.bh.1001-5965.2014.0181
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Tong detection algorithm is a common used signal detection algorithm. But the overall conclusions about statistical performance and parameter setting of Tong detection algorithm are absent. Aiming at these problems, statistical and recursive analysis methods were used to carry on theoretical analysi...
Multi-user collaborative interface
YANG Qiang, LIU Jie, ZOU Yu, QIN Yongqiang, YU Chun, SHI Yuanchun
2015, 41(3): 424-430. doi: 10.13700/j.bh.1001-5965.2014.0465
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The multi-user characteristic is a key factor for interactive tabletops. Some emerging collaborative patterns emerge during the process of multiple users gathering around interactive table and collaborating face to face. The interface which shows the emerging collaborative pattern is a design paradi...
Design of visual simulation system of aircraft flight load spectrum measured data based on double-buffering technology
TIAN Zhaofeng, YAN Chuliang
2015, 41(3): 431-436. doi: 10.13700/j.bh.1001-5965.2014.0599
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Aircraft load spectrum measured data visual simulation is an important means to identify maneuver and to verify the validity of measured data in flight testing. A data storage method based on logical data channels was put forward to solve the structural differentiation problem of different data sour...
Performance analysis of high accuracy multi-dimensional limiting process
SUN Di, YAN Chao, YU Jian, QU Feng, HUA Jun
2015, 41(3): 437-442. doi: 10.13700/j.bh.1001-5965.2014.0185
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The conventional limiting process is mostly based on one-dimensional structure, which cannot keep monotonic features of quantities under conditions of multi-dimensional discontinuities, leading to non-physical oscillations. In order to overcome the structure defects of the conventional methods, mult...
Carrier airwake simulation methods based on improved multi-objective genetic algorithm
TAO Yang, HAN Wei
2015, 41(3): 443-448. doi: 10.13700/j.bh.1001-5965.2014.0198
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A new numerical turbulence simulation method to enhance the credibility of simulation of carrier airwake free-air turbulence components has been presented. At first, the turbulence sequence of each direction was presented as the Euler forward different format with correction factors. Meanwhile, asso...
Printed circuit board model updating based on response surface method
XU Fei, LI Chuanri, JIANG Tongmin
2015, 41(3): 449-455. doi: 10.13700/j.bh.1001-5965.2014.0219
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Abstract:
Optimization analysis based on response surface is used in finite element (FE) model updating in recent years. Printed circuit board (PCB) model updating process based on response surface was presented. First six modal frequencies of PCB were calculated using ANSYS and correlated with modal test res...
Simultaneous topology and shape optimization method in conceptual design of disk
FAN Jun, YIN Zeyong, WANG Jianjun, MI Dong, YAN Cheng
2015, 41(3): 456-465. doi: 10.13700/j.bh.1001-5965.2014.0232
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Abstract:
To minimize the effects of artificially chosen variables on optimization results, simultaneous topology and shape optimization (STSO) method was proposed for structural optimization of aero-engine disk at the conceptual design phase. This method was based on solid isotropic material with penalizatio...
Real-time drawing technique for textured surface based on multi-projector system
CHEN Feng, LIU Yue, WANG Yongtian
2015, 41(3): 466-471. doi: 10.13700/j.bh.1001-5965.2014.0466
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Abstract:
With the development of the hardware performance of projectors and techniques on computer graphics, projections are used on more common surfaces so as to provide vivid and shocking visual effects. A new method that employed multi-projector system and interactive flat devices to modify the appearance...
Numerical simulation of adsorption characteristics of magnetic take-up roll for amorphous ribbon
SONG Yanming, YANG Yang
2015, 41(3): 472-478. doi: 10.13700/j.bh.1001-5965.2014.0180
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Take-up roll (TUR) is a key component in amorphous ribbon automatic production line. Take-up rate of TUR determines the ribbon quality and production rate. Because the line speed of amorphous ribbon in the ribbon process is fast and the amorphous ribbon suffers from different resistance, TUR should ...
Self-adaptive laser marking technology for marking code on tool
XU Lang, HE Weiping, WAN Min, LI Weidong, LEI Lei
2015, 41(3): 479-484. doi: 10.13700/j.bh.1001-5965.2014.0206
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Abstract:
In view of the recent situation that several defects of traditional laser marking code on tool appear such as marking inefficiency, marking quality instability and the harm to workers, a self-adaptive laser marking technology was put forward. The conveyor and V-block of specific structure were desig...
Resonance suppression method based on digital filter for servo system
WANG Jianmin, WU Yunjie, LIU Youmin, ZHANG Wulong
2015, 41(3): 485-491. doi: 10.13700/j.bh.1001-5965.2014.0218
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According to mechanical resonance problem in flight simulation servo system (turntable system), the principles of resonance suppression about traditional notch filter and second-order low-pass filter were analyzed. Afterwards the two-second resonance suppression digital filter was proposed. The two-...
Improved back-projection imaging algorithm for approximate forward looking missile-borne SAR
YE Xiaoming, ZHANG Guofeng, HU Xiaoguang, CHEN Ruiguo, SUN Yanhe
2015, 41(3): 492-501. doi: 10.13700/j.bh.1001-5965.2014.0223
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In order to solve the problems that the existing high squint missile-borne synthetic aperture radar (SAR) algorithm can not deal with too high squint angle, and that the calculated amount of traditional back-projection (BP) imaging algorithm is too large, as well as that the current fast BP algorith...
Regulation strategies on the public transit system with information provision
LIU Dalong, TIAN Qiong
2015, 41(3): 502-508. doi: 10.13700/j.bh.1001-5965.2014.0227
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The effects of various regulation strategies on the transit fare and frequency in public transit system with information provisionwas studied. Besides two extreme strategies, namely monopoly optimum and social optimum, the rate-of-return strategy and quantity control strategy were also investigated ...
Analysis on vibration transmission characteristics of box-like power structure
GAO Weijin, WANG Liang, LIU Yongguang
2015, 41(3): 509-516. doi: 10.13700/j.bh.1001-5965.2014.0245
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Box-like dynamic structures are proceeding at the direction of maximization and flexibility. Vibration transmission characteristics of geared shaft-bearing-housing were studied by finite element method under different excitation conditions for two-stage reducer. Gearbox was used as a flexible substr...
Perigee altitude control using aerodynamic force during aerobraking
JI Yingliang, ZHU Hongyu, YANG Bo
2015, 41(3): 517-522. doi: 10.13700/j.bh.1001-5965.2014.0197
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An approach of perigee altitude control using aerodynamic force was provided to deal with the decline of perigee during the orbital transfer process of aerobraking. The atmospheric flight control law considering the bank angle as control variable was investigated, and the computer simulation which r...
Post-buckling damage analysis and fatigue life prediction of thin plate
XIAO Hao, HU Weiping, ZHANG Miao, MENG Qingchun
2015, 41(3): 523-529. doi: 10.13700/j.bh.1001-5965.2014.0174
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Post-buckling damage of thin plate under compressive load in plan was studied, and the fatigue life of plate was predicted by taking the coupling effect of buckling and fatigue damage into account. Firstly, the finite element model was established, and the critical buckling load and buckling mode we...
New adaptive PID control method based on IFA-ELM for aero-engine
JIAO Yang, LI Qiuhong, LI Yebo
2015, 41(3): 530-537. doi: 10.13700/j.bh.1001-5965.2014.0182
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For the strong nonlinear and variable parameters properties of high bypass ratio turbofan engine, an adaptive PID control method based on optimized extreme learning machine (ELM) was proposed to predict the engine's parameters. To improve the prediction accuracy and the real-time property of ELM, an...
Calculation of brake disk life based on unsteady discontinuous brake
ZHOU Bin, LI Shulin, CHANG Fei, SHI Xiaopeng, YIN Junjie
2015, 41(3): 538-544. doi: 10.13700/j.bh.1001-5965.2014.0184
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Focus on the problem that the actual service life of brake disks is always shorter than the calculated data underground test, made use of the friction coefficient curves and took the actual statistic using boundary of carbon brake disk to fit a friction coefficient curve of unsteady discontinuous br...
Forecasting for aero-engine failure risk based on Monte Carlo simulation
ZHAO Hongli, LIU Yuwen
2015, 41(3): 545-550. doi: 10.13700/j.bh.1001-5965.2014.0190
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Abstract:
In view of the fact that aero-engines have complicated structure and multiple failure modes, traditional methods are difficult to meet the requirements. A forecasting method for aero-engine failure risk based on Monte Carlo simulation is presented, which is used to evaluate the possibility of failur...
Calculation and analysis of the scatter of load spectrum damage based on Fokker F27 airplanes
LI Tang, HE Xiaofan, LIU Wenting
2015, 41(3): 551-558. doi: 10.13700/j.bh.1001-5965.2014.0195
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To assess the reliability life of a fleet, the scatter of the load spectrum must be considered. In this paper, 56 individual load spectra are compiled based on the acceleration-exceedance curves corresponding to a fleet of Fokker F27. With the application of the SWT formula and linear accumulative d...
Object tracking based on the joint model using L2-norm minimization
WANG Meng, WU Yi, DENG Jiankang, LIU Qingshan
2015, 41(3): 559-566. doi: 10.13700/j.bh.1001-5965.2014.0455
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The computational cost of the tracking algorithm based on the sparse representation is so much large, at the same time, the target apparence changes on account of a variety of reasons,which makes the object tracking process complicated and time consuming. A joint model is reasonably proposed by comb...

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