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2013 Vol. 39, No. 10

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Modeling and analysis of multi-helicopter coordinate system with slung load
Song Yanguo, Wang Huanjin
2013, 39(10): 1279-1285.
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A generic simulation model of multi-helicopter cooperated system with slung load by using elastic cable has been developed for research on control and avionic instrumentation. Flight dynamic models of each helicopter and payload were developed respectively. Elastic cables were treated as spring/damp...
Design of a novel curved wall profile multi-step feed horn
Zhang Yongfang, Miao Jungang, Jiang Jingshan
2013, 39(10): 1286-1291.
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A novel multi-step feed horn with a curved inner wall was introduced. The curve profile of its inner wall is composed of the sine profile and the Gaussian profile. This feed horn can be easily manufactured due to its simplified structure, and its radiation performance can be improved by optimizing t...
Design and optimization of elimination tool in rubber forming of TB5 titanium
Sun Yongna, Wan Min, Wu Xiangdong
2013, 39(10): 1292-1297.
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Wrinkling will occur in the rubber forming of convex flange, even for the forming of TB5 titanium when the flange height is higher. Wrinkling was quantified as objective functions. The rubber forming process with different side blank holder parameters were simulated based on the optimum design and F...
Fatigue crack monitoring of metallic structure based on coating sensor
Hou Bo, He Yuting, Cui Ronghong, Ding Hua
2013, 39(10): 1298-1302.
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To allow continuous crack monitoring of aircraft metallic structures during their service, a fatigue crack monitoring method was presented based on modern surface technology and electrical potential technique. A crack monitoring coating sensor, consisting of the insulated separating layer, the condu...
Analysis of the effect of ventilation positions on hydrodynamic characteristics of submarine-launched vehicle
Sun Tiezhi, Wei Yingjie, Wang Cong, Cao Wei
2013, 39(10): 1303-1308.
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Based on the theory of homogeneous equilibrium flow, by solving the RANS equations of mixture media, SST turbulence transport equations and the mass transport equations between each phase, three dimensional numerical simulation was carried out to study how the positions of ventilation holes impact o...
Modeling air combat situation assessment based on combat area division
Xiao Liang, Huang Jun, Xu Zhongshu
2013, 39(10): 1309-1313.
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The beyond visual range(BVR) air combat has become one of the most important air modes of modern air combat. The whole airspace division was made base on advantages and disadvantages of regional area. Four specific airspace situations were put forward. A new model was set up combined situation asses...
Simulation of the working process of launch vehicle pressurization system in random vibration condition
Wang Chong, Liang Guozhu
2013, 39(10): 1314-1318.
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To study the dynamic characteristic and stability of the launch vehicle tank pressurization system working in random vibration condition, harmony superposition method was used to simulate the random process; and component-shell-placement was introduced as vibration excitation to modify the existing ...
Gradual fault prediction method for electronic system based on adaptive RVM
Fan Geng, Ma Dengwu, Zhang Jijun, Wu Minghui
2013, 39(10): 1319-1324.
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Aiming at gradual fault prediction of electronic system, a method based on adaptive relevance vector machine (RVM) was proposed. Firstly, the phase space of electronic system performance parameter time series was reconstructed, and then the corresponding relationship between the input and the output...
Anchoring point and blow-off mechanism of Bunsen laminar premixed flame
Huang Xia, Huang Yong, Gong Fan
2013, 39(10): 1325-1330.
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A velocity-matching method (VM Method) combined with the wall quenching effect was used to analyze the anchoring point movements and the blow-off characteristics of a methane-air laminar premixed Bunsen flame in lean and rich conditions. A blow-off model was achieved and proved by experiments. The f...
Energy efficiency state evaluation method for ammonia refrigeration system
Liu Chong, Cai Maolin
2013, 39(10): 1331-1336.
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In order to evaluate the energy efficiency of the ammonia refrigeration system, a novel two-dimensional matrix model was proposed. Based on thorough analysis of the popular evaluation methods, analytic hierarchy process-fuzzy comprehensive evaluation and information entropy method, a new combination...
All-lifting-vehicle induced flow improvement effect
Wang Linlin, Gao Ge
2013, 39(10): 1337-1341.
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The saucer-shaped aircraft is a kind of all-lifting-vehicle with low aspect ratio. Bionic fin-shaped wing tips were used to improve the induced flow over the saucer-shaped aircraft and impair the induced flow separation, and then the aircraft aerodynamic efficiency could be increased. The high preci...
SPM based on normalized cut for image classification
Ding Kai, Chen Weihai, Wu Xingming, Liu Zhong
2013, 39(10): 1342-1347.
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Abstract:
It is difficult to classify scene images with high accuracy when the dataset is relatively large. Spatial pyramid matching was proposed to deal with this problem, but there are some shortages. As an improvement, the algorithm based on normalized cut was proposed. Normalized cut was utilized instead ...
Design and analysis of locust-like jumping mechanism
Yin Junmao, Chen Diansheng, Shen Qi
2013, 39(10): 1348-1353,1359.
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A jumping mechanism based on jump characteristics of locust was presented. By biological observation and kinematic analysis of locust jump, the key effect of locust's hind leg knee on the jump performance was discovered, and a simplified dynamic model of locust was built to simulate locust take-off....
Modeling and control simulation of PZT-DDV using hydraulic amplification
Yu Juntao, Jiao Zongxia, Wu Shuai
2013, 39(10): 1354-1359.
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A servo valve direct driven by piezoelectric actuator (PZT-DDV) using hydraulic amplification was researched. It takes advantage of the higher bandwidth and larger flow rate. The actuary model was built. The characteristic of PZT-DDV was investigated based on the co-simulation environment of AMESim ...
Rate-dependent modeling and tracking control of giant magnetostrictive actuators
Guo Yongxin, Mao Jianqin
2013, 39(10): 1360-1365.
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Abstract:
A Hammerstein model was proposed to model giant magnetostrictive actuators (GMA). A modified Prandtl-Ishlinskii(MPI) model and an autoregressive model with exogenous input (ARX) were used to represent the static nonlinear part and the linear dynamic part of the Hammerstein model respectively. Model ...
Model parameters updating of lunar lander
Wu Jianyun, Wang Chunjie, Wang Han
2013, 39(10): 1366-1369,1375.
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The parametric model of the lander was established, and the landing collision process was simplified as a spring-damper model. Parameters including stiffness, damping, force exponent and the maximum penetration depth were set to be updated. Landing stability plane was defined to determine whether th...
Ionospheric delay in the Antarctic GPS positioning
Xu Yan, Yang Yuanxi, Xu Guochang, Jiang Nan
2013, 39(10): 1370-1375.
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Based on the global position system(GPS) dual-frequency measured data of international GNSS service (IGS) station in Antarctic region, the variation of ionospheric delay and the impact of ionospheric second-order delay on GPS positioning was analyzed. Result shows, total electron content(TEC) in Ant...
Fisher discriminant method for multiple compositional-data variables in simplex space
Shangguan Liying, Wang Huiwen
2013, 39(10): 1376-1380,1391.
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As foundation work, the algebra operations of compositional-data vector were investigated,based on the algorithms of compositional data in simplex space. Further, according to traditional method, Fisher discriminant analysis(FDA) on multiple compositional-data variables was proposed. The novel metho...
Original task planning method of early warning system of LEO based on DPSO-SA
Jian Ping, Zou Peng, Xiong Wei
2013, 39(10): 1381-1386.
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To improve the resource efficiency for missile tracking with early warning system of low-earth-orbit(LEO), the original task planning model of early warning system of LEO was set up. The model includes the optimizing indexes of tracking precision, task accomplishment and resource slack. The dynamic ...
Experiment of multi-component hydrocarbon fuels RP-3 thermal conductivity
Zhou Haipeng, Wen Jie, Deng Hongwu, Jia Zhouxia
2013, 39(10): 1387-1391.
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Based on the classic trasient hot-wire princeple, the experiment apparatus for the measurement of multicomponent hydrocarbon fuel thermal conductivity under high temperature and high pressure was introduced. The calibration results of absolute ethyl alcohol, toluene and high pressure nitrogen show t...
Degradation mechanism of air-entrained concrete under alternative actions of freeze-thaw cycles and seawater immersion
Geng Jiao, Diao Bo, Chen Shenggang
2013, 39(10): 1392-1396.
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Experiments had been done on air-entrained concrete test cubes(air content is 5.9%) experienced alternative actions of freeze-thaw cycles in the seawater to explore the properties deterioration mechanism via testing the compressive strength, the relative dynamic elastic modulus and the mass loss. Th...
MCS model based on Jerk input estimation and nonlinear tracking algorithm
Zhou Zheng, Liu Jinmang, Tan Xijiang
2013, 39(10): 1397-1402.
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A new tracking algorithm was proposed for high maneuvering target based on current statistical (CS) model, modified input estimation (MIE) and unscented strong tracking filter (USTF). The state equation and adaption method of acceleration variance of the CS model were modified with Jerk input estima...
Distributed cooperative guidance law for multiple missiles attacking maneuver target
Sun Xuejiao, Zhou Rui, Wu Jiang, Chen Shaodong
2013, 39(10): 1403-1407.
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On the basis of distributed communication and augmented proportional guidance, a kind of distributed collaborative guidance law was designed for maneuver target intercepting based on the network synchronization principle. This guidance law was based on double layer hierarchical cooperative structure...
Analysis on tensile properties and influence factors of composite hybrid joints
Huang Wenjun, Cheng Xiaoquan, Wu Pengfei, Li Zhonghai
2013, 39(10): 1408-1413.
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Proper bolted or screw / bonded hybrid joint design can improve the structure efficiency. In order to solve the analysis and design problems that exist in screw / bonded hybrid composite joint structures, a 3D damage accumulation finite element analysis (FEA) model was established based on the softw...
Adaptive backstepping control for flight path angle based on high gain observer
Chen Wei, Lu Jingchao, Yuan Liaoyuan, Zhang Weiguo
2013, 39(10): 1414-1420.
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An adaptive neural network high gain observer was designed to solve the problem that the states of the flight control system were not absolutely measurable. The adaptive items based on the radial basis function (RBF) network were introduced into the general high gain observer on purpose of the on-li...

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