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2012 Vol. 38, No. 6

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Analysis on stability and structure computation of helicopter with slung-load
Cao Long, Cao Yihua, Ma Chao, Xu Zhongda
2012, 38(6): 711-714.
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Computing method is given of geometric structure of slung-load for specially designated flight mission.Using this method, the geometry and internal force of slung rope were estimated. The influence of velocity and slung weight on geometry of slung-load was analyzed. An improvement of some existing h...
Statistical scaling of durability life for independent multi-detail structures
He Xiaofan, Dong Yanmin, Liu Yanmao, Liu Wenting
2012, 38(6): 715-719.
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To assess the fatigue life for aircraft structure, the specimen used for the durability test is often designed as multi-details(MD) to simulate the structural configuration and load transfer. Once one detail fails, the fatigue testing is ended, and the fatigue life of single detail(SD) must be deduc...
Design of helicon plasma source for VASIMR
Li Bo, Wang Yibai, Zhang Puzhuo, Wang Shouguo
2012, 38(6): 720-725.
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Helicon plasma has the advantages of very high density, strong controllability and electrodeless. Therefore, it is applied in variable specific impulse magnetoplasma rocket (VASIMR). A helicon plasma source was designed, and the design methods of two key components, magnet coils and helicon antenna,...
Carrier phase/SINS integrated navigation for spacecraft on high earth orbit
Wen Yongzhi, Wu Jie
2012, 38(6): 726-730.
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Because of the fewer available satellites and the greater wastage of signal on space link, the measurement accuracy is lower using pseudo-distance. The method of autonomous navigation using carrier phase of global navigation satellite system(GNSS) and strapdown inertial navigation system (SINS) was ...
Experiment and numerical simulation on heat-shielding properties of metallic honeycomb panel in high temperature environment
Zheng Liming, Wu Dafang, Wang Yuewu, Gao Zhentong
2012, 38(6): 731-735.
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Using the infrared radiation aerodynamic heating simulation test system, the heat-shielding properties of the metallic honeycomb panel were tested up to 800℃; Taking into consideration of the radicalization among honeycomb wall surfaces and the heat transfer of metal structure and air within honeyco...
Theory and method of numerical simulation for 3D atmospheric turbulence field based on Von Karman model
Gao Jing, Hong Guanxin, Liang Zaoqing
2012, 38(6): 736-740.
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Three-dimension-field atmospheric turbulence based on Von Karman model was generated with Monte Carlo simulation,in view of correlation function matrix. According to the derivation of the Von Karman model formulae, the correlation curves of the simulated field can highly approach the theory results....
Rocket fault feature extraction based on time-frequency analysis
Cui Guilei, Tang Yonghua
2012, 38(6): 741-744,749.
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To obtain more valuable information from rocket flight test data as much as possible, a fault feature extraction model was proposed to the need of rocket vibration analysis. 3D Fourier spectrum was constucted to analyze the time-varying trend of entire observation signal efficiently. Standard and fa...
Surface passivation effect on the static coke deposition of kerosene at supercritical pressure
Zhu Kun, Deng Hongwu, Xu Guoqiang, Zhang Chunben
2012, 38(6): 745-749.
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Experiments were performed to investigate surface passivations-effect on coking reaction of aviation kerosene RP-3 fuel, and to evaluate the chemical durability of passivating films via the static experiment system at the supercritical pressure. The results reveal that: surface passivation technolog...
Online fault detection of networked control systems for flight vehicles
Wang Mingming, Wang Qing, Dong Chaoyang
2012, 38(6): 750-754.
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An online fault detection algorithm for the networked control system of flight vehicle was proposed considering the network-induced delay and the short sampling period. The fault detection model was established for the impact of the unknown time-delay. Based on the model, the residual generator was ...
Preliminary orbit determination method of HEO satellite using a single navigation GPS satellite measurements
Li Taohu, Liu Jiansheng, Qin Honglei, Li Rui
2012, 38(6): 755-759,765.
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The autonomous navigation of highly elliptical orbit (HEO) satellites using GPS needed to solve a key problem of the preliminary orbit determination under the condition of only one navigation satellite. The feasibility by using the pseudo-range received from a single navigation satellite was demonst...
Estimation method of domestic advanced fighter-s fly-away cost
Liu Hang, Xu Ming, Wu Zhe, Yan Weitian
2012, 38(6): 760-765.
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Because of the generation difference, the improvement in technology and the discrepancy of research and development (R&D) system, the foreign estimation models, which have been extensively used until now, cannot be applied to calculate the domestic advanced fighter-s fly-away cost. To solve this...
Application of harmonic balance method in simulations of low speed unsteady flows
Du Pengcheng, Ning Fangfei
2012, 38(6): 766-771.
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The harmonic balance method is an effective computational method in simulating time periodic unsteady flows. When using the harmonic balance method based on compressible flow equations to solve low Mach number flows, both the accuracy and convergence of the solution would be deteriorated due to the ...
Method of extended testability modeling for on-off multi-state system
Shi Junyou, Wang Fengwu, Zhang Xin, Shi Meng
2012, 38(6): 772-777.
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The existing methods for testability-modeling have some constraints, including the consistency of failure criterion, failure transmitting and logical-value criterion of test. Aiming at states differences of on-off multi-state system, the method of extended testability modeling was proposed. Failure,...
Time-dependent reliability models of components with rotatory-symmetrical structure
Wang Zheng
2012, 38(6): 778-782.
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The failure characteristic of components with rotatory-symmetrical structure and the effect of the number of symmetrical parts on their reliability were analyzed. The probability density function and cumulative distribution function of strength of components with rotatory-symmetrical structure were ...
Performance analysis for frequency domain detection method in spatial color noise background
Wang Jing, Huang Jianguo, Jiao Yameng
2012, 38(6): 783-787.
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Underwater noise environment of small aperture array is spatial color noise background. A super-directive beamforming in frequency domain (FSD) method was proposed to solve the problem that the array gain of super-directive beamforming cannot reach maximum when there exists error in the estimated no...
Improvement of Jahangir’s multiple moments estimator
Li Dapeng, Yao Di
2012, 38(6): 788-792.
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Based on M.Jahangir-s multiple moments estimator using constant weight, a new estimator named L-J estimator was proposed, which consists of multiple moments and uses function weight. The optimum weight function was obtained by the sequential algorithm for optimization according to the monotonic rela...
Distributed adaptive power allocation in cooperative wireless communication systems
Li Guoyan, Zhang Youguang
2012, 38(6): 793-798,803.
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The performance of the cooperative transmission system can be improved significantly by allocating powers optimally among cooperative nodes when the system has a total power constraint. For a two-hop cooperative transmission system with only one relay node, the closed-form expression of the optimal ...
Parallel access leakage flow rate measurement of compressed air
Huang Liang, Cai Maolin
2012, 38(6): 799-803.
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An instantaneous method for measuring leakage flow rate was proposed by employing a standard flow. Measuring equipment was connected to the pipeline, which promised the convenience and non-destruction. Standard flow was used to determine the internal volume of measured equipment. And a nonlinear dis...
High-accuracy automatic locating system based on templates
Liu Rong, Peng Yanmin, Tang Can, Mao Jian
2012, 38(6): 804-809.
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In order to meet the requirement of robot assisted surgery which identified the object automatically with high precision, the Bumblebee 2 camera systems were used, and the ellipse and the circle were regarded as a template. The corners in the image were detected by the proposed algorithm. After the ...
Beacon error-tolerable method for node localization in 3D wireless sensor networks
Guo Xiaolei, Yu Ning, Wu Yinfeng, Wan Jiangwen
2012, 38(6): 810-815.
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For 3D wireless sensor networks (WSNs) with inaccurately positioned beacon nodes, a novel multi-hop node localization method that can tolerate beacon position errors was proposed. The influences of independent variable errors and dependent variable biases on node coordinate estimation were taken int...
Applications of exponential-approximate method with multi-resolution in spare requirement determination
Liu Tianhua, Zhang Zhihua, Li Dawei, Zhang Guangyu
2012, 38(6): 816-818,822.
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As to the fact that it is difficult to determine the renewal function (RF) of the Weibull distribution, the closeness between the two distributions with the same average life was studied. On this condition, the RF of exponential distribution was applied to compute that of the Weibull distribution, a...
Transmitting spectra-temperature characteristic of single-mode fiber coupler
Li Yan, Zhang Min, Li Lijing, Yang Dewei
2012, 38(6): 819-822.
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The output spectra of fiber sources which transmitted through a single-mode fiber coupler were measured by changing temperature. When the input wave of Sagnac interferometer from the fiber coupler were transmitting wave and coupling wave respectively, the temperature characteristics of signal-errors...
Effect of rating residual on recommendation quality
Hu Biyun, Li Zhoujun, Wang Jun, Chao Wenhan
2012, 38(6): 823-828.
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The effect of the rating residual on recommendation quality was analyzed. The rating residual was measured through user ratings and latent preferences. Latent preferences were computed with psychometric models. With different levels of rating residual, the effect of the rating residual was experimen...
Occlusion handling approach in visual tracking based on multiple-kernel fusion
Xiao Peng, Duan Miyi, Zhao Qi
2012, 38(6): 829-834,841.
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A novel visual tracking approach based on multiple-kernel fusion was proposed to improve robustness and accuracy of tracking under large-area occlusion. Unlike traditional single symmetric kernel weighted histogram used in mean shift tracking, this approach adopted several asymmetric kernel function...
Multi-sensor multi-target systematic bias fusion estimation algorithm
Song Qiang, Xiong Wei, He You
2012, 38(6): 835-841.
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To solve the problem of sensor systematic bias estimation in sensor network, a systematic bias fusion estimation algorithm was presented based on multi-sensor multi-target information. To solve the forenamed problem, the algorithm was constituted a two layer fusion structure. In order to improve the...
5-coordinate transformation technology of CNC system for a variety of structures of machine tools
Jin Yang, Huan Ji, Xiao Wenlei, Guo Chengjun
2012, 38(6): 842-848.
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The uniform method of coordinate transformation was studied, which is suited for a variety of structures of 5-axis machine tool. CNC(computer numerical control) coordinate transformation library was developed, which could be integrated into CNC system as a coordinate transformation control module. T...
Cutting temperature and tool wear in minimum quantity lubrication vibration drilling of superalloys
Kong Fanxia, Zhang Deyuan
2012, 38(6): 849-852.
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Processing method of minimum quantity lubrication (MQL) vibration drilling was used to solve difficulty of high cutting temperature and rapid tool wear in drilling of superalloys. Cooling mechanism in vibration drilling was analyzed from the point of heat transfer mechanism and comparative experimen...

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