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2012 Vol. 38, No. 5

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Energy management ascent guidance algorithm with multiple constraints
Xu Heng, Chen Wanchun
2012, 38(5): 569-573.
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Abstract:
The ascent guidance for hypersonic vehicle launch mission needs to satisfy multiple constraints. For the solid-powered launch vehicle without burn control, energy management was applied to satisfy the constraints. To achieve the energy management, the basic idea is to control the angle between the t...
Optimal correction strategy during Lambert transfer from view of probability
Xu Ming, Tan Tian, Li Zhiwu
2012, 38(5): 574-578.
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Monte-Carlo simulation and genetic algorithm were employed to achieve the optimal correction strategy during Lambert transfer from the view of probability. The Lambert trajectory associated J2 perturbation was generated from differential correction algorithm that was used to yield the periodic orbit...
Rapid aircraft structure modeling based on structure case base
Feng Haocheng, Luo Mingqiang, Liu Hu, Wu Zhe
2012, 38(5): 579-584,590.
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Abstract:
In order to utilize and study more effectively from existing examples of aircraft structure information, the parametric object-oriented description method of structure instance was studied. The architecture framework of aircraft structure case base was proposed and the prototype system was establish...
Trajectory tracking for automated aerial refueling based on adaptive dynamic inversion
Gai Wendong, Wang Honglun, Li Dawei
2012, 38(5): 585-590.
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Abstract:
Receiver aircraft trajectory tracking control is studied during the automated aerial refueling (AAR). The method of the outer guidance loop and inner control loop was adopted. The method was proposed to combine the nonlinear path-following guidance and adaptive neural networks, and was used in recei...
Light-stripes fast matching method for raster binocular stereo vision sensor
Wei Zhenzhong, Fan Yanrui, Hou Yarong
2012, 38(5): 591-594,600.
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Raster binocular stereo vision sensor is widely used in 3D measurement, and one of its difficulties is light-stripe matching and recognizing. Based on the relationship between the viewed stripes number and the stripe sequence combination, a fast matching method for light-stripe based on 3D searching...
Influent of inerting process of multi-bays central fuel tank for civil passenger airplane under various gas distributions
Feng Shiyu, Feng Chenxi, Wang Qixiang, Liu Weihua
2012, 38(5): 595-600.
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Based on the assumption of zero mass accumulation in the fuel tank and all bays, a mathematical model to automatically determine the flow direction and rate via the pressure difference was set up, and iterative steps were offered. Then, the mole concentration of the oxygen in the each bay related to...
Preparation and atomic oxygen resistance of polyimide/inorganic oxide composite films
Wang Kai, Xiao Fei, Zhan Maosheng
2012, 38(5): 601-604.
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Three series of polyimide/inorganic oxide composite films were synthesized through sol-gel method using zirconium n-butoxide, tetrabutyl titanate and tetraethyl orthosilicate as the oxide precursor, respectively. The atomic oxygen (AO) resistance testes of the films were carried out using a ground-b...
Optimization in the stable region of demand information sharing supply chain systems
Wang Jing, Yang Huan, Han Weiwei
2012, 38(5): 605-613.
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A DIS-APIOBPCS (demand information sharing-automatic pipeline inventory and order based production control system) model was established to confirm the system-s stability indexes. Based on the impact of system parameter on the system stability, the system stable region was confirmed. Three stability...
Hydraulic system simulation platform under the framework of airborne electromechanical integrated management
Deng Shuo, Yang Bo, Wang Yunlu, Wang Jiangyun
2012, 38(5): 614-619.
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The simulation platform of aircraft hydraulic system had been designed based on the utility management system. Its design concept and structure of simulation platform were described, the principle and realization of each subsystem of simulation platform were expounded, and the design concepts and co...
Optical flow/INS multi-sensor information fusion
Liu Xiaoming, Chen Wanchun, Xing Xiaolan, Yin Xingliang
2012, 38(5): 620-624.
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Several optical flow sensors were mounted dispersedly on a missile airframe. The airframe kinematics model in the vertical plane and the optical flow sensor measurement model were established. Discrete-time Kalman filters were used to fuse the optical flow data and rate gyroscope data, and estimate ...
AQSSE method for damage identification of base-isolated structures
Mu Tengfei, Zhou Li, Yin Qiang
2012, 38(5): 625-629.
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A new data analysis method, referred to as the adaptive quadratic sum-squares error(AQSSE) method,has been investigated for the online identification of time-varying system parameters of structures. Experimental study was conducted and presented to verify the capability of the AQSSE approach for ide...
Structural optimization design based on non-probabilistic convex modeling reliability
Wang Xiaojun, Wang Lei, Jia Xiao, Qiu Zhiping
2012, 38(5): 630-635.
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Abstract:
Taking into account the uncertainty of structural system parameters and based on the proposed new definition of the non-probabilistic reliability index based on convex models, a new mathematical model and solution method of structural optimization design was proposed under the non-probabilistic reli...
Object auto-segmentation based on watershed and graph cut
Liu Rong, Peng Yanmin, Tang Can, Cheng Sheng
2012, 38(5): 636-640,647.
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Abstract:
In order to segment CT slices mostly and accurately, watershed algorithm and graph cut were combined. Firstly, the inner contour and the outer contour of the target object were selected, and then watershed algorithm was applied to divide the region between contours into series of smaller regions. Ea...
Three dimensional numerical simulation of rotor in vertical descent flight
Cao Dong, Cao Yihua
2012, 38(5): 641-647.
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Abstract:
Using the actuator disc model, blade element momentum theory and computational fluid dynamics(CFD)method, the flow field and aerodynamic performance of a helicopter rotor in vertical descent flight were simulated. In calculation, the loads of spinning rotor were represented as momentum source terms ...
Network coding-aware opportunistic forwarding mechanism in wireless multi-hop networks
Yuan Yongqiong, Zhang Jun, Wang Yun
2012, 38(5): 648-653.
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Abstract:
A network coding-aware opportunistic forwarding (NCAOF) mechanism was proposed to overcome the defects of COPE with passive coding. Taking advantage of broadcast characteristic of wireless channel, NCAOF combines the features of opportunistic forwarding and network coding. Compared with traditional ...
Numerical simulation of helicopter slung-load flow field and fins design
Ma Chao, Cao Yihua, Xu Zhongda
2012, 38(5): 654-658.
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Abstract:
Tow 3D slung-load models of helicopter were built by the CAD software according to the known geometry data. Fins of the first slung-load were designed with the method of mapping pictures. Through methods of computational fluid dynamics(CFD), the slung-load with fins was calculated and analyzed, and ...
Method of small unmanned aerial rotorcraft altitude information fusion based on wavelet filter
Bai Lang, Lei Xusheng, Sheng Wei, Du Yuhu
2012, 38(5): 659-664.
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Focusing on the low performance of the sensors for the small unmanned aerial rotorcraft, an adaptive Kalman method based on filter data was proposed to improve the accuracy and reliability of the altitude measurement information. Using the wavelet decomposition and reconstruction filter, the high fr...
Two-layer clustering over data stream with fault-tolerance
You Yuyang, Zhu Jihong, Yang Zhihong
2012, 38(5): 665-669,674.
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A new envolving data stream clustering algorithm with fault-tolerance characteristic was proposed named FTGDStream (fault-tolerant grid-density clustering over data stream). It introduces appropriate relaxation of conditions for discover generalised knowledge in real world data polluted by noise. Fi...
Fusion algorithm for transient loading volume with accumulative error
Wang Xinfeng, Wang Hongzhi, Gao Minzhong
2012, 38(5): 670-674.
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In order to improve measuring accuracy of rocket propellant loading volume, an ultrasonic flowmeter and a high precision liquid-level meter were added to the original loading-system based on the single flowemeter. The relationship between the liquid-level and the volume was calibrated in advance. Th...
Process planning of aircraft skins NC trimming based on reconfigurable fixture
Hu Fuwen, Li Dongsheng, Li Xiaoqiang, Zhu Minghua
2012, 38(5): 675-680.
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For aircraft skins NC trimming based on the combination of the reconfigurable fixture (RF) and 5-axis gantry type milling machine, a process planning method was presented. Firstly, the locating principle, design configuration and positioning datum coordination of RF were introduced. Then the process...
Damping assessment and improving design of blade shrouds based on contact states
Hong Jie, Yang Xin, Chen Lulu, Zhang Dayi
2012, 38(5): 681-687.
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Damping assessment and improving design of a certain type of shrouded blades were conducted by applying the damping design method of sawtooth shroud based on contact states. Contact states included contact forms and contact parameters, in which contact forms could be used to judge the rationality of...
Parameters estimation method of radial transformable airship
Xiao Zhiyuan, Li Zhengneng
2012, 38(5): 688-691,696.
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Abstract:
To break the crucial technical difficulties of controllable aerostat in near space, and make it possible of controlling aerostat going and returning between ground and near space, the conception of solar powered radial transformable airship was raised, and it-s parameters estimation method was given...
Compound control strategy for the pump-controlled-parallel-variable-displacement-motor speed system
Zheng Qi, Li Yunhua, Yang Liman
2012, 38(5): 692-696.
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Addressing the adaptive characteristics of the flow rate and the multiplying nonlinearity in the pump-controlled-parallel-variable-displacement-motor speed system, a kind of compound control architecture was proposed, in which the pressure is controlled by on the variable displacement pump and the r...
New range-Doppler decoupling method for FMCW ladar
Wang Qiao, Du Xiaoping, Zhao Jiguang
2012, 38(5): 697-701.
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Abstract:
FMCW(frequency modulation continues wave) ladar could detect moving target. It often uses 2-dimension FFT method to decouple range and doppler frequency. When detecting high speed target, different chirp period spectrum peaks are not in the same range bin, and using 2-dimension FFT method would acqu...
Structure design of a new cooling system combined micro channel and film cooling in the turbine blade
Sun Jining, Deng Jing, Deng Hongwu
2012, 38(5): 702-706.
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Numerical simulation was used to investigate a new compound cooling system, which combines micro channel and film cooling together in a guide turbine vane. Research was focused on the optimization design of these new organizational structures, in order to discuss the different effect on the characte...
Synthesis and properties of bisphenol B dicyanate ester resin
Xuan Lixin, Wang Zhiqiang, Wang Hongwei, Liu Yanming
2012, 38(5): 707-710.
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The preparation process of non-crystallized BBDCy(bisphenol B dicyanate ester resin) by alkaline catalyzer was researched. The structure and processing property of BBDCy monomer were characterized by FTIR, NMR, DSC and Rheometer. The dielectric property, heat resistance and mechanical properties of ...

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