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2010 Vol. 36, No. 3

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Numerical analysis on traction performance of trapezia lugged wheel by distinct element method
Cui Yi, Li Wen, Wang Jun, Sun Peng
2010, 36(3): 253-256.
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Abstract:
The soft-terrain trafficability of trapezia-lugged wheel on lunar surface was analyzed by distinct element method (DEM). The modeling technology of DEM was presented to produce irregular-shaped particulate system. The mesoscopic formula of traction performance for wheel was built. Based on simple sh...
Effects of pressure on the coking characteristic of jet fuel RP-3
Ju Yinchao, Xu Guoqiang, Guo Jun, Wang Yingjie
2010, 36(3): 257-260.
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Abstract:
The influences of pressure on the surface coke deposition of RP-3 were studied by experiments. The flowing RP-3 is heated up to supercritical state in a 2m long single-pass stainless steel tube( Ф 2.2×0.2, 1Cr18Ni9Ti) with constant heat flux. The mass flow is 4g/s. The mount of surface coke depo...
Fault diagnosis for piston head looseness of aero hydraulic pump
Zhao Sijun, Wang Shaoping, Shang Yaoxing
2010, 36(3): 261-264.
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Abstract:

Piston head looseness is a typical progressive failure of aero hydraulic pump. It is difficult to make precise fault diagnose because the fault feature is misty, the fault samples are insufficient and the measurable signals are full of structure coupling and noise besides failure feature. In order t...
Approach to choose integration testing combination for foundational software platform
Gao Jing, Lan Yuqing, Jin Maozhong
2010, 36(3): 265-269.
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Abstract:
Concerning the problem of combination explosion which was caused by the combinations of all kinds of foundation software, the methods of combinatorial design were studied, and an approach based on combinatorial design was proposed to choose integration testing combinations that cover the interaction...
Improvement method for testability modeling with multiple faults
Shi Junyou, Gong Jingjing, Xu Qingbo
2010, 36(3): 270-273.
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Abstract:

The existing methods for testability modeling were analyzed,and their shortcomings in project application were given. An improvement method for testability modeling was proposed, based on the signal flow graph method. It supports to set multiple faults for units, and can distinguish between global f...
Air-SeaSim CGF model system based on factory mechanism
Zhang Yuan, Zhang Limin, Zhang Lin
2010, 36(3): 274-278.
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Abstract:
Aiming at simultion model reusability deficiency problem, based on the tactical background of a sea-air combat, the Air-SeaSim CGF(computer generated forces) simulation model system based on the factory mechanism was designed. Following the "bottom-up" development principle, the system software arch...
Fast slicing algorithm for triangular mesh model
Sun Dianzhu, Zhu Changzhi, Li Yanrui
2010, 36(3): 279-282.
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A fast slicing algorithm for triangular mesh model was proposed. The node splitting algorithm and the clustering algorithm of R*-tree were improved and the spacial index structure of triangular mesh model was established based on the improved R*-tree. The position of slice planes was computed accord...
Design of novel planar shorting structure broadband monopole antenna
Chen Aixin, Wei Wenxuan, Jiang Tiehua, Zhang Yanjun
2010, 36(3): 283-286.
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Abstract:
An improved novel planar shorting structure broadband monopole antenna was presented. In the light of planar structure easily conformal to substrate, the special shape structure and the technique of load-adding, this kind of antenna realizes the miniaturization and has a better bandwidth and radiati...
Fault diagnosis approach for bearing based on EMD and slice bi-spectrum
Zhang Lin, Huang Min
2010, 36(3): 287-290.
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Abstract:
A new approach based on the empirical mode decomposition (EMD) and slice bi-spectrum was presented for fault diagnosis on roller bearings. Original signals were decomposed into a series of intrinsic mode functions (IMFs) of different scales. Envelopes of the IMFs were extracted and a diagonal slice ...
Optimal design of clutch in automatic transmission
Tang Pengxiang, Liu Yanfang, Wang Shuhan, Xu Xiangyang
2010, 36(3): 291-294.
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Abstract:
For commonly used wet multi-plate clutch in automatic transmission(AT), completed the optimized design of the clutch using fuzzy theory and main objective method with optimization toolbox of MATLAB. According to clutch design formula, the optimal design mathematic model was set choosing average ener...
New algorithm for inverse kinematics of 6R serial robot mechanism
Huang Xiguang, Liao Qizheng
2010, 36(3): 295-298.
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Abstract:
The theory of double quaternions and its application in the inverse kinematics of serial mechanisms was introduced. A new algorithm for the inverse kinematics of 6R mechanisms was presented based on the complex exponent form of double quaternions. Based on double quaternions, a mathematical model of...
Fault tree analysis of corrosion failure for aircraft structures and improvements
Pan Bo, Huang Lingcai, Jiang Tongmin, Hou Weiguo
2010, 36(3): 299-302.
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Abstract:
To analyze corrosion failure of aluminum alloy structures on export airplane used in marine environment, the fault tree analysis was proposed to analyze the erosion factors of aircraft structures. Through investigating and analyzing on failure processes and failure mechanism of structural components...
Vertical cantilever rotor machines vibration self-recovery regulation system with continuously dripping liquid-injection automatic balance device
Li Yan, Wang Weimin, Li Shuangxi, Gao Jinji
2010, 36(3): 303-306.
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Abstract:
To improve the disadvantage of normal injection balance device, the continuously dripping liquid-injection automatic balance device was developed. The balance device can change the mass distribution of rotor with injecting liquid to right chamber, and it-s balance capability can-t be reduced by drip...
Flow separation and side-load in nozzle
Lin Zhen, Wang Changhui, Liu Yu, Xu Xiaoyong
2010, 36(3): 307-310.
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Abstract:
A three-dimensional numerical simulation about the separation flow in the high-altitude nozzle of a liquid rocket engine on ground was conducted. It obtaines the flow field parameters and the side-loads under work conditions from 8MPa inlet total pressure to 1MPa inlet total pressure. The results ...
Modeling and performance analysis of IEEE-1394 asynchronous transfer mechanism
Yang Yusheng, Zhang Chunxi, Li Lijing
2010, 36(3): 311-314.
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Abstract:
High speed data bus technology is one of the core techniques in avionics. IEEE-1394 is a serial high speed data bus, and has been applied in avionics successfully. Its asynchronous transfer mechanism guarantees the reliability of data transferred and is widely used to transfer command and status dat...
Stress-strain incremental law in asymptotic state for soils
Luo Ting, Tian Xinguo
2010, 36(3): 315-318.
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Abstract:
Based on the classical elasto-plastic theory, the transformed stress space deduced from the spatially mobilized plane(SMP) criterion and a new concept of similar elastic volume modulus, the stress-strain incremental equations of soils for the asymptotic state constitutive model were established. A s...
Building and simulating associated multi station aeronautical search models composed of active and passive sonars
Wu Fang, Yang Rijie, Gao Qingwei
2010, 36(3): 319-323.
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Abstract:

In the background of aeronautical anti-submarine, the search range models of multistatic sonar, aircraft associated search models of dipping sonar and buoys, submarine moving models were built. Based on those models, the influence of the varieties of submarine initialization courses, sea environment...
Constellation design method of space cooperation detection system
Yu Ze, Zhou Yinqing, Chen Jie, Li Chunsheng
2010, 36(3): 324-327.
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Abstract:

The working mode of the space cooperation detection system composed of several synthetic aperture radar (SAR) satellites and one optical satellite was studied. After investigating the properties of the sun-synchronous orbit and the frozen orbit, the orbital semimajor axis, the eccentricity, the incl...
Micro-material-test mechanism oriented precision technique
Lu Zhen, Chen Xuedong, He Guangping
2010, 36(3): 328-332.
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Abstract:
Micro electromechanical systems(MEMS) have vast vistas of application in the aeronautics, astronautics, automobile, bioengineering, environmental management, military, etc. However, the material tests are the bottleneck of the property test for MEMS. That is concerned with subtle motion, precision l...
Adaptive CMAC hybrid control for rudder electric loading systems
Yang Bo, Wang Zhe
2010, 36(3): 333-337.
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Aiming at the nonlinearity and the surplus torque in rudder electric loading systems of unmanned aerial vehicle(UAV), a self-adaptive cerebellar model articulation controller (CMAC) was proposed, which was parallel to an adaptive neuron controller. This hybrid control strategy adopted the desired va...
Design of flight control and navigation systems based on two ARM for unmanned helicopter
He Tianpeng, Wang Jidong, Hu Jizhong, Wang Son
2010, 36(3): 338-341.
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Abstract:
Central processing unit(CPU) of embeded flight control and navigation systems was designed in a certain type of coaxial unmanned helicopter by two microcontrollers based on advanced RISC machine(ARM), together with power source and servo signal processing module, signal processing and interface modu...
Modeling of VCM-DDV and control simulation
Wu Shuai, Kang Rongjie, Yu Juntao, Jiao Zongxia
2010, 36(3): 342-345.
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Abstract:
The characteristic of a new type voice coil motor-direct drive valve(VCM-DDV) was investigated based on the co-simulation environment of AMESim and Simulink. By using AMESim the VCM-DDV nonlinear model and hydraulic environment have been set up. By using Simulink the digital controller mode has been...
General test platform for data manager system of spacecraft
Yin Jia, Wang Zulin, Feng Wenquan, Zhao Qi
2010, 36(3): 346-349.
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Abstract:
In order to accelerate the data manager system testing rate of progress, the general test platform for data manager system of spacecraft was designed and structured. The standardization of the testing method and system framework was realized by the platform to study the testing objects. General avai...
Formal definition and characteristic analysis of UML sequence diagram
Li Xiaoli, Long Xiang, Bao Xiaolu, Li Hu
2010, 36(3): 350-352.
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Abstract:
A formal method of software specification and a set of mathematics models were put forward based on UML(unified modeling language) sequence diagram. UML sequence diagrams reflect the interaction and sequence of message among the concurrent objects in the system, and hold the important position in so...
DSMC numerical simulation of Taylor-Couette flows
He Xiaoying, He Bijiao, Cai Guobiao
2010, 36(3): 353-356.
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Abstract:
Taylor vortices in Taylor-Couette flow between two coaxial cylinders were simulated numerically using 3D direct simulation Monte Carlo(DSMC) model with grids in cylindrical coordinates. The axial vortices structure in stable flow was investigated for different computation domains under different bou...
Control strategy for single-phase Z-source inverter
Zhang Jin, Qi Bojin, Zhang Shaoru
2010, 36(3): 357-362.
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Abstract:
The control strategy for single-phase Z-source inverter, which consisted of Z-source network voltage feedback, ac-side instantaneous feedback and voltage ripple feed-forward loop, was presented. Due to the non-minimum-phase effect of Z-source network, an ac-side instantaneous controller was incorpor...
Polarization restraint based fast motion estimation approach to stereoscopic video coding
Ai Mingjing, Zhao Lili, Zhao Qinping
2010, 36(3): 363-367.
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An efficient polarization restraint based fast motion estimation algorithm for stereoscopic video coding was proposed after analyzing polarization restraint principle in a parallel binocular-camera system. The left- and right-view images were compressed as the base and enhancement layer respectively...
Integer algorithm of lapped biorthogonal transform compression method with GPU
Yu Zhuo, Liang Xiaohui, Ma Shang, Shen Xukun
2010, 36(3): 368-372.
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Compression/Decompression of huge terrain data is an important component of GC(Geometry Clipmap) method which has significant impact on rendering speed. Integral lapped biorthogonal transform(binLBT) method was used to reduce the complexity of computation by converting float point operations which s...
Optimal deployment in sensor networks based on hybrid artificial fish school algorithm
Liao Canxing, Zhang Ping, Li Xingshan, Zhang Yan
2010, 36(3): 373-377.
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Abstract:
A hybrid artificial fish school algorithm was presented for optimal nodes deployment of sensor networks. The hybrid artificial fish school algorithm included two phases. In speed priority phase, a suboptimal solution in the neighborhood of optimum solution was found rapidly by using the artificial f...

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