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2010 Vol. 36, No. 8

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Transient measurement of heat transfer coefficient
Ding Shuiting, Jiang Zugang, Xu Guoqiang, Luo Xiang
2010, 36(8): 883-886.
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A new method called constant heat flux method was talked about the calculation of the heat transfer coefficient, h . The way of calculating h for the transient experiment was from step-change solution by giving a constant heat flux suddenly. If the time at which the changes colour of thermochromic l...
Fuzzy theory for uncertain structural analysis based on measurement data
Wang Xiaojun, Yang Haifeng, Qiu Zhiping, Song Weibo
2010, 36(8): 887-891.
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Abstract:
Based on the measurement data,a fuzzy analysis method was proposed to deal with the problems of uncertain structural mechanics. A new membership function of the uncertain parameters was constructed by utilizing the difference coefficient, and then a finite number of scattered data points of the unce...
Scheme for vision-aided navigation in flight with reference of road intersections
Wu Liang, Hu Yun-an
2010, 36(8): 892-895.
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To release the range limit caused by choosing the fixed landmark as reference, a vision-aided navigation scheme for aircraft with reference of road intersections was proposed. The road intersections were extracted based on the curvilinear structure extraction algorithm. The searching space was reduc...
Assessment based on support vector machine for rolling bearing grade-life
Hong Jie, Han Lei, Miao Xuewen, Ma Yanhong
2010, 36(8): 896-899.
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Grade-life was used to describe rolling bearing-s service life, and an assessment model was presented for bearing-s Grade-life. Signal feature extraction and pattern recognition algorithm were keys to construct the model. Vibration signals of the rolling bearing were analyzed, and the wavelet packet...
UDRE estimation approach based on satellite surveillance dilution of precision
Shao Bo, Liu Jiansheng, Huang Zhigang, Li Rui
2010, 36(8): 900-903.
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Satellite based augmentation system (SBAS) provides user differential range error (UDRE) which guarantees satellite ephemeris and clock correction accuracies to the users to enhance their integrity. A method of calculating UDRE only used in the master station was introduced, then a concept of satell...
Numerical dissipation of Roe’s scheme with preconditioning for low-speed flows
Cao Ning, Wu Songping
2010, 36(8): 904-908.
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Preconditioning is necessary for simulating of low-speed flows with Roe-s scheme. With most research on choosing preconditioning parameter, the solution may be wrong. Numerical experiments show the numerical dissipation of the scheme has a notable effect on low-speed flow numerical simulation with p...
Real-time weak signal detection with the envelope mean filter algorithm
Ye Weidong, Li Xingshan
2010, 36(8): 909-912.
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The weak signal detection in strong noise environment had been a big difficulty in signal processing domain. A new algorithm that was the envelope mean filter(EMF) was discussed. The waveform of the weak signals that deeply buried in uniformly distributed noise can be recovered by EMF algorithm in r...
Modeling, system identification and validation of small rotorcraft-based unmanned aerial vehicle
Yang Fan, Xiong Xiao, Chen Zongji, Zhang Ping
2010, 36(8): 913-917.
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In order to realize the flight control system of small rotorcraft-based unmanned aerial vehicles (RUAV), a precise dynamics model is needed. A time-domain system identification framework was presented for AF25B RUAV. The modeling process considered the influence of fuselage, main rotor/stabilizer ba...
Numerical simulation of oxygen supply system's performance parameters characteristic at high altitude
Yu Zhongjun, Zhao Jingquan
2010, 36(8): 918-921.
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The working process of aviation oxygen supply system(OSS)at high altitude was described, and the mathematic model for the performance parameters characteristics of OSS was built, combining with the principle of dynamics of gas flow. By the numerical simulation with Matlab/Simulink and the theoretica...
Analysis of dynamic performance of crossflow heat exchangers for helicopters
Zhou Yi, Gao Hongxia, Yu Jianzu, Li Ming
2010, 36(8): 922-926.
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Abstract:
Modeling and simulation of transient heat transfer in crossflow heat exchanger are necessary for developing the oil system in helicopters. The dynamic model of crossflow heat exchanger was established by using lumped thermal controlled methods, and its accuracy was proved by dynamic experimental res...
Investigation of the design of wing hot-air anti-icing system
Bu Xueqin, Yu Jia, Lin Guiping, Song Xin
2010, 36(8): 927-930.
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The thermal fluid system simulation tool Flowmaster and the computational fluid dynamic tool Fluent were combined for the simulation of the wing hot-air anti-icing system (WHAIS) design and thermal performance analysis. The design parameters contained the piccolo tube diameter, the jet hole diameter...
Modeling of wing flexure and filtering solution in transfer alignment
Xie Chunming, Zhao Yan, Wang Jinan
2010, 36(8): 931-935.
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Abstract:
Focusing on the remarkable influence of wing flexure on transfer alignment(TA), a two-laser ranging method was presented to measure the wing flexure of missile-borne strapdown inertial navigation system(SINS) in different hook. An AR(n) model was put forward to simplify the ARMA(p,q) model to perfor...
Fault diagnosis for independent power-supply system using multi-agent information fusion
Zhang Li, Yuan Haiwen, Lü Hong, Yuan Haibin
2010, 36(8): 936-939.
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Abstract:
The fault diagnosis and prognosis research for Independent power-supply system(IPSS) was an important step to ensure the safety for the complex moving devices system. Current fault diagnosis system problems for IPSS were analyzed. The method of combining multi-sensor information fusion with multi-Ag...
Modeling and stability analysis for high altitude tethered balloon
Zhu Ming, Zuo Zongyu
2010, 36(8): 940-944.
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Stratosphere high altitude tethered balloon (HATB) is a typical under-damping autonomous system, so it is required for the platform itself to be stable. However, it is hardly to investigate the platform stability theoretically through the classical Lyapunov first method, because there exist zero eig...
Modeling and simulation of soft ground arresting system for aircraft
Li Fengyu, Jiao Zongxia, Gui Yongquan
2010, 36(8): 945-948.
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The arresting system stops the aircraft effectively when the aircraft passes beyond the end of the runway during an aborted takeoff or landing which minimizes the damage to the aircraft and the passengers. The arresting system is a kind of important safety facility for airports. Based on this, a new...
Separation of variables solutions of stability problems of orthotropic rectangular thin plates
Wang Xingming, Liu Bo, Xing Yufeng
2010, 36(8): 949-952.
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The stability problems of orthotropic rectangular thin plates were solved by using separation of variables, and the analytic solutions were obtained for three boundary conditions, which are the same with the results in literature. The present solution method is much simpler than traditional semi-inv...
FPGA-based power drive device for voice coil motor used in direct drive valve
Wang Dayu, Guo Hong, Yu Kaiping, Zhang Lijia
2010, 36(8): 953-956.
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Abstract:
As the power drive device for voice coil motor requires a controller with higher computation speed, analog control is used in traditional method. There are inherent shortcomings, such as characteristics of drift, disabilities of interfacing with digital controller directly. A field programmable gate...
Feature extraction of hyperspectral image based on locally linear embedding
Dong Chao, Zhao Huijie
2010, 36(8): 957-960.
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Feature extraction can eliminate the redundant information hidden in the hyperspectral image. It is a necessary preprocessing step of the hyperspectral image analysis system, the classification for instance, to improve the precision and efficiency. Traditional feature extraction algorithms are based...
Application of 3D control chart in performance monitoring and sorting of Li ion batteries
Wang Xiaohong, Li Tianye, Li Xiaogang
2010, 36(8): 961-964.
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In order to sort Li ion batteries and monitor their performance status, the control chart method was applied, which used to utilize in quality control. Firstly some interrelated analyses were done about the failure mechanisms of Li ion battery to select the parameters that could reasonably describe ...
Effect of stress amplitude on high-cycle fatigue life of 2A12-T4 aluminum alloy under proportional loading
Shi Xinhong, Zhang Jianyu, Bao Rui, Fei Binjun
2010, 36(8): 965-968.
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Fatigue life experiments with funneled-shape specimens were conducted to investigate the effect of stress amplitude on multi-axial high-cycle fatigue failure of 2A12-T4 aluminum alloy under tension-torsion proportional loading. Based on the experiment results, three kinds of life-prediction criteria...
Real perceive-based technology of time and space consistency in distributed virtual environment
Zhang Jiong, Lei Xiaoyong, Dai Shuling
2010, 36(8): 969-972.
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Many existent methods emphasize on constructing absolute consistency models, but without analyze the movement rules of virtual environment (VE), their practical values were limited. Beginning from the rules of VE, a realistic-based consistency model was proposed. Based on the human perception, a mat...
Kind of novel micro integrative transceiver module
Wei Xinguo, Chen Xiao, Song Jingming
2010, 36(8): 973-976.
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Fiber optic gyroscope (FOG) can be affected greatly by temperature and vibration. The limitations of input channel depolarization scheme and full polarization maintaining scheme were analyzed. Then, a kind of micro integrative transceiver module was designed to integrate super luminescent diode (SLD...
High altitude simulation experiment system for low power hydrazine arcjet
Zhang Xinai, Tang Haibin, Shi Chenbo, Liu Yu
2010, 36(8): 977-980.
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A high altitude simulation experiment system for low power hydrazine arcjet was presented. The elements in this system including vacuum facility, propellant feed system, power control unit, full elastic micro thrust measurement equipment, data acquisition system etc. were depicted in details. To mee...
Domain-oriented simulation designing and modeling tool
Wen Wei, Fang Wei, Huang Xiaodong, He You
2010, 36(8): 981-985.
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The design and implementation of the domain-oriented designing and modeling tool, SIMDEMO, were discussed. A cooperative modeling methodology supporting multi-views modeling was built by decomposing system models which involve various modeling stages, users, aspects into multi-views based on princip...
Unmanned helicopter autonomous board landing system and simulation experiment
Wulan Bagen, Hu Jizhong, Xu Yuanming
2010, 36(8): 986-990.
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The unmanned helicopter autonomous landing system was composed of vision and recognition sytem, a target tracker, a deck-s state tracker and a fuzzy logic controller. The vision system performed to process the captured image and compute the image-s affine moment invariants. The label was recognized ...
Rudder flutter analysis method of missile with jet vane
Jing Zhiwei, Wu Zhigang, Yang Chao
2010, 36(8): 991-995.
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Traditional flutter analysis and commercial software can not analyze rudder flutter of missile with jet vane. An approach for solving rudder flutter of missile with jet vane was presented. Dynamic sub-structure method was applied to establish dynamic formulation of rudder flutter in state space and ...
Decision-making of saturation attack for missile weapon-target assignment with multi-target
Yang Fei, Wang Qing, Dong Chaoyang
2010, 36(8): 996-999.
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Saturation attack is an important tactical method in high-tech war against enemy-s important target and increase missile-s penetration probability. In accordance with saturation attack tactics- guiding ideology, the constraints and criterion of optimal allocation for multi-firepower-s coordinated at...
Vision based navigation system of UAV and improvements of the corresponding filtering algorithm
Xu Chao, Fan Yaozu, Shen Xiaorong, Luo Yufeng
2010, 36(8): 1000-1004.
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A vision/inertial integrated navigation system was built. The corresponding filtering model was established by treating the motion models of aerial vehicle and landmark as the system function and the vision information as the observation. Complex additive noise model was adopted to describe the syst...
Principle and application of horizontal suspension isolator constituted by trilinear pendulum
Xu Dengfeng, Gao Zhenyu, Zhu Yu, Zhang Ming
2010, 36(8): 1005-1008.
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For the suspension isolator constituted by trilinear pendulum, the Lagrangian equation with swing angle as generalized coordinate was established firstly at a particular direction. When the swing angle was a particular value, the three-dimensional graphic was projected onto a plane, other variables ...

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