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2007 Vol. 33, No. 04

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Fatigue analysis for civil aircraft fuselage typical truss joint in serving environment
Zheng Xiaoling, Bao Rui, Fei Binjun
2007, 33(04): 379-382.
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Abstract:
Fatigue analysis for civil aircraft fuselage typical truss joint in serving environment was discussed, in which detail fatigue rating (DFR) method in corrosive environment was used. A way was presented to determine DFR-corrosion-influence-factor of structural element in serving environment by the DF...
Effects of two-dimensional interference on pressure distribution of a circular disk
Gao Lei, Wang Jinjun, Zhang Panfeng
2007, 33(04): 383-387.
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Abstract:
The effects of two-dimensional disturbance, induced by a circular cylinder placed upstream, on the aerodynamic characteristics of a circular disk have been investigated in wind tunnel. The pressure distribution on the windward surface of the disk was studied with different cylinder diameters and spa...
Quick algorithm for designing emergency orbital transfer scheme
Shi Jun, Han Chao
2007, 33(04): 388-391.
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Abstract:
A quick algorithm for designing emergency orbital transfer scheme that can meet the requirements of measure, fuel and time during emergency orbita l transfer was presented. The orbital transfer mode suitable for variable search was given. The question of designing orbital transfer scheme quickly was...
TVD scheme and numerical simulation of aerodynamic heating in hypersonic flows
Xie Jinrui, Wu Songping
2007, 33(04): 392-396.
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Abstract:
In order to get more accuracy results for heat transfer in chemical non-equilibrium hypersonic flow simulations, a new entropy correction function in TVD (total variation diminishing) scheme was presented. By study of characters of the flow in boundary layer, an anisotropy entropy correction functio...
Endoatmospheric interceptor fast response control using impulse attitude control motor
Wang Jin, Chen Wanchun, Yin Xingliang
2007, 33(04): 397-400.
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Abstract:
The effectiveness of aero control decreases as dynamic pressure decreases. Therefore impulse attitude control motor(ACM) is to be used to maintain fast response of missile in low dynamic pressure. A preliminary study of the method was given. The impact of ACM on the dynamics of missile was analyzed ...
Heat transfer analysis using ANN with experimental data of 180° turn channels with rib turbulators
Ding Shuiting, Wei Xia, Tao Zhi, Xu Guoqiang
2007, 33(04): 401-404.
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The heat transfer character inside the 180° turn channel with variable cross-section and different rib turbulators was studied by experiment. The channel is the middle part of a gas turbine blade. The data set evaluated by the experiment was processed by dividing the channel into several sections. A...
Near real-time optimization for reentry trajectory of RLV
Wang Qi, Ding Yunliang
2007, 33(04): 405-408.
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Abstract:
Determining how to find the best controls of a re-entering reusable launch vehicle (RLV) so that it is able to safely reach the terminal area energy management (TAEM) involving the solution of a two-point boundary value problem. This problem, which is considered to be difficult, is traditionally sol...
Optimization design for aeroelastic dynamics of T-tail
Lü Bin, Tan Shengang, Wan Zhiqiang, Yang Chao
2007, 33(04): 409-413.
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Due to complicated configuration and multi control surfaces, the flutter characteristic design of T-tail is complicated and there are many parameters in the process of establishing dynamics finite element model, so the designers face more difficulties. In order to solve these problems , optimization...
Integrative design model and algorithm for nano-satellite-s radiator surfaces and heat insulation layers
Li Yunze, Ning Xianwen, Wang Xiaoming, Zhuang Damin
2007, 33(04): 414-417.
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Passive thermal control system is very important for Nano-satellite′s temperature control and its working safety. The calculations of radiator surface area and heat insulation layer thickness are necessary for the design of passive thermal control system. A set of integrative design equations and al...
Film bleeding on internal cooling in rectangular channel
Ding Shuiting, Hou Xiaojing, Xu Guoqiang, Deng Hongwu
2007, 33(04): 418-421.
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Abstract:
An experimental study was made to obtain heat transfer data in a rectangular channel with two ribs and nine holes. The objectives were to investigate the effect of mass flow ratios and bleed holes area ratio on internal cooling. Test was performed with single bleed hole as well as with multiple hole...
BTT missile autopilot design based on dynamic inversion
Zhang Yan, Duan Chaoyang, Zhang Ping, Chen Zongji
2007, 33(04): 422-426.
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Abstract:
Autopilot design for BTT (bank-to-turn) missile is difficult because of its complex nonlinear characteristics and strict flight states limit by ramjet engine. The non-minimum phase phenomenon was discussed while direct dynamic inversion method was adopted. New BTT missile control system framework wa...
Robust stabilization of uncertain nonholonomic kinematic systems
Li Chuanfeng, Wang Chaoli
2007, 33(04): 427-430.
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Abstract:
Lots of research on the stabilizing problem of certain nonholonomic kinematic systems has been developed. However, when the geometric parameters of systems are unknown, especially, considering uncalibrated vision measure in control systems, kinematic systems are uncertain. The stabilizing problem wa...
Control of chaotic oscillation for helicopter rotor blade
Liang Tingwei, Wang Qi
2007, 33(04): 431-434.
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Abstract:
The flapping model of rotor blade can be expressed as the model of Duffing′ oscillator with periodic exciting force in the dynamic balance test of helicopter rotor. To control the chaotic vibration in flapping, a method of changing exciting signals in Duffing′ model was proposed to restrain the chao...
Teleoperating system of Stewart platform based on VR
Wang Zhifeng, Wang Zhanlin, Fu Yongling, Wu Qiang
2007, 33(04): 435-439.
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The virtual system for teleoperating Stewart platform based on VR (virtual reality) technical was designed. The principle of the drive arithmetic for the virtual model was instructed. In this arithmetic, firstly proper coordinate system was established, and then a series of coordinate transform was ...
Investigation of cloud detecting for satellite images based on immune coding principle
Zheng Hong, Cao Qiong, Han Yu
2007, 33(04): 440-444.
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Abstract:
To utilize the texture diversity of clouds and land in remotely sensed images, a novel describing method for image targets identification with complex background was proposed. The properties and classification of object image describing immune primitives was computed by the correlation between antib...
Novel road detection and tracking algorithm for aerial images
Li Shuxiao, Chang Hongxing
2007, 33(04): 445-449.
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Abstract:
A novel road detection and tracking algorithm for intelligent pilotless aircraft applications was illustrated. Initially, synthetic image was extracted from electron road maps to initialize the road areas. Then, road detection was expressed as a minimizing problem by means of using distance transfor...
Application of multistage influence diagram game theory for multiple cooperative air combat
Zhong Lin, Tong Mingan, Zhong Wei
2007, 33(04): 450-453.
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Abstract:
In order to make maneuvering decisions in uncertain environments, the influence diagram theory and game theory were introduced to maneuvering decision making in multiple cooperative air combat and the cooperative influence diagram game model was presented. Firstly, the principles that the large grou...
Robust localization algorithms for outdoor mobile robot
Zong Guanghua, Deng Luhua, Wang Wei
2007, 33(04): 454-458.
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Abstract:
On the basis of Pioneer3-AT wheeled outdoor mobile robot, coder, gyro, compass and RTK-GPS were used for the robot localization. A new kind of federated Kalman filter was designed in which data from multiple sensors were fused stage by stage. Data of odometry and gyro were fused firstly. Then the fu...
Statistical analysis of step-stress accelerated life testing for repairable product
Li Xiaoyang, Jiang Tongmin, Li Meijun
2007, 33(04): 459-462.
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Abstract:
During step-stress accelerated life testing (SSALT), in order to evaluate life and reliability characteristics of repairable product, the equation principle of accumulative hazard functions under two different stress levels was put forward. On the base of the rule, time conversion function was prese...
Point cloud multi-view registration and integration technology based on automobiles-bodies RE design
Zhou Yu, Du Farong, Gao Feng, Qu Weiwei
2007, 33(04): 463-466.
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Abstract:
As the automobiles-bodies point cloud had the traits of large geometric dimension, huge data and rigor reverse precision, one registration and integration algorithm based on the framework points was put forward. The algorithm-s basic idea is to construct the framework points of vehicle model and the...
Simulation model resource discovery technology based on semantics for simulation grid
Hou Baocun, Li Bohu, Chai Xudong
2007, 33(04): 467-471.
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To solve the problem about the lack of the semantic description and discovery for the simulation model resources in the grid resource management middleware, the ontology technology was introduced and the description ontology was defined to implement the semantic description for simulation models. Th...
Formal modeling and analysis of UML statecharts
Yao Shuzhen, Jing Maozhong
2007, 33(04): 472-476.
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The structural and semantic features of UML statecharts are analyzed firstly, and the hierarchical colored Petri net(HCPN) is constructed to solve modeling issues,especially those related to hierarchical statecharts with composite states. The Petri subnet for a composite state is composed of input/o...
Forecast modeling for structural equation model
Wang Huiwen, Zhang Ying
2007, 33(04): 477-480.
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Based on the historical data, a forecast modeling method for structural equation model was discussed, where the future relationship between the system factors was described without future sample. By applying spectra of matrix, the covariance matrix was decomposed of eigenvectors and eigenvalues. Typ...
Design and implementation of model repository testing based on metamodel and JUnit
Huang Long, Guo Yufu, Wu Ji, Jin Maozhong
2007, 33(04): 481-485.
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Abstract:
To solve repository testing problem of test models in model driven testing, the single element, single test metamodel and combination of test metamodels coverage criteria were proposed. Test cases were generated by instantiation method and test verdict problem was discussed. The model repository tes...
Cloud model based algorithm for global optimization of functions
Zhang Guangwei, Kang Jianchu, Li Hesong, Li Deyi
2007, 33(04): 486-490.
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Numerical optimization of given objective functions is a crucial task in many scientific problems. Based on the outstanding characteristics of cloud model on the process of transforming a qualitative concept to a set of quantitative numerical values, and integrate with the basic principle of genetic...
On reliability model of IEEE-1394b network interconnections
Duan Jingyuan, Zhang Chunxi, Shi Jieqin
2007, 33(04): 491-494.
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To solve calculable problem of IEEE-1394b network interconnection reliability, based on IEEE-1394b topology, a task based analysis method of system reliability was proposed, a reliability model of IEEE-1394b interconnection system was developed and the system reliability matrix definition was shown....
Optimal block distribution in carry-skip adders
Cui Xiaoping, Wang Chenghua
2007, 33(04): 495-499.
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A new type of optimal block distribution algorithm of two level carry-skip adder was described to determine optimal block distribution sizes. According to this algorithm, with the given total worst case delay, the maximum optimal block distribution sizes of the adder for that delay can be determined...
Predictive modeling on multivariate linear regression
Wang Huiwen, Meng Jie
2007, 33(04): 500-504.
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Based on the historical data, predictive method of multivariate linear regression model was discussed, where both future multivariate regression parameters and the performance evaluation statistics were estimated without future data. Prediction to the regression parameters was converted to predict c...

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