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2013 Vol. 39, No. 2

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Guide star selection method applied to ballistic missile
Wang Hongli, Chen Cong, Cui Xiangxiang, Jiang Wei
2013, 39(2): 143-147.
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Abstract:
The present researches on guide star selection methods applied to ballistic missile are not enough, therefore a novel uniformization selection method according to standard trajectory was discussed. By analyzing the impacts of missile trajectory and various flight parameters, and constructing the ‘ps...
Modeling method and vibration characteristics of aero-engine rotor system
Zhang Li, Hong Jie, Ma Yanhong
2013, 39(2): 148-153,163.
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According to the structural and mechanical properties of rotor system on the modern turbofan engine, an investigation about the finite element modeling technology and dynamic characteristics of low-pressure rotor was proposed, based on the finite element method (FEM). The finite element model of rot...
Dynamic model and flight control method for structure damaged aircraft
Zhong Youwu, Ni Shaobo, Yang Lingyu, Shen Gongzhang
2013, 39(2): 154-158.
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The dynamic model of a structure damaged aircraft was presented, for designing flight control law to ensure flight safety when the aircraft structure damaged partially. After analyzing the dynamic model, the rotational motion of structure damaged aircraft could be decomposed to normal aircraft rotat...
Connective boundary's electromagnetic leakage in finite-difference time-domain
Ji Jinzu, Huang Daqing, Huang Peilin, Lu Zhenyi
2013, 39(2): 159-163.
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When calculating target's radar cross section(RCS) with finite-difference time-domain(FDTD), the incident wave was induced using connective boundary. In ideal situation without scattering target, there is only incident wave in total field region and the field in scattering field region is zero. But ...
Airborne centrifugal refrigerating compressor design and characteristic analysis
Gao Feng, Zhang Xingjuan, Yuan Xiugan
2013, 39(2): 164-167.
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A key technique which is critical to design vapor cycle system (VCS) of the new-generation high-performance fighter aircraft is to develop a super-mini compressor with 50kW cooling capacity. Due to the small air rate flowing through the mini compressor, the designing experience which was used for th...
Investigation of Whipple shield hypervelocity impact based on scaled test method
Zhang Xiaotian, Jia Guanghui
2013, 39(2): 168-172,177.
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Hypervelocity impact above 7 km/s was investigated based on scaled test method for spacecraft shielding issue. Simulation models of single bumper and Whipple shield were built, both Al-Al impact and Cd-Cd impact problems were simulated under multiple cases. The comparison of test and simulation show...
Analysis of storage stability of accelerometers
Xu Dan, Liao Xun, Chen Yunxia, Kang Rui
2013, 39(2): 173-177.
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Based on the finite element analysis(FEA) results of quartz flexible accelerometers, the stability of the scale factor changing with temperature and time was obtained. Then a kind of surface fitting method which was the product type based on least squares, was applied to fit the simulating data and ...
Realization of model-based fault diagnosis with artificial neural network
Ma Jiming, Wan Wei, Wang Fayan
2013, 39(2): 178-183.
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Based on artificial neural network, a method for fault detection and fault identification was proposed, which can be used during the model-based fault diagnosis (MBFD) process. Firstly, back-propagation (BP) neural network was presented for parameter estimation, combing with the system model, the fa...
Carrier estimation algorithm based on novel hybrid particle filtering
Zhang Hua, Zhang Youguang, Li Guoyan
2013, 39(2): 184-189.
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Abstract:
To reduce the computation complexity and improve the weight degeneracy and loss of diversity about the particles in particle-filtering (PF) based carrier estimation, a novel hybrid particle filter based carrier estimation algorithm was proposed and the method for assigning particle weights of the pr...
Damage simulation of composite materials based on strain invariant failure theory
Li Xing, Guan Zhidong, Liu Lu, Li Zengshan
2013, 39(2): 190-195.
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Strain invariant failure theory (SIFT) estimates failure in fiber and matrix based on mechanical failure modes, which is suitable to study meso-interaction between fiber and matrix, and to evaluate influence of curing residual stress. Mechanical theory background of SIFT was introduced. Square, hexa...
Aircraft dynamic derivatives calculation using CFD techniques
Ye Chuan, Ma Dongli
2013, 39(2): 196-200,219.
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Abstract:
Only the sum of aircraft pitching moment angle of attack(AOA) rate derivative and pitch rate derivative could be obtained by simulating the forced pitch oscillation using the unsteady flow numerical calculation method. But the dynamic stability analysis needs separate dynamic derivatives. To solve t...
Attitude stabilization and power compensation control for spacecraft with VSCMGs
Tian Lin, Xu Shijie
2013, 39(2): 201-205.
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Abstract:
Based on dynamics model of variable speed control moment gyroscopes (VSCMGs), the mixed control equation plus subsystems- decoupling constraint equation were established. The attitude and energy mixed control steering law was developed synchronously via matrix projection method. Influence of flywhee...
Dew point measurement based on the sensitive circuit
Nie Jing, Meng Xiaofeng, Wang Shuo, Zheng Rui
2013, 39(2): 206-209.
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According to the problem of atmospheric humidity measurements, the dew point measurement method was proposed based on the sensitive circuit. The quartz crystal as a humidity sensor, when water condensation produced by the Peltier cooling appears on the quartz crystal, the test circuit will stop the ...
Matching design for payload and range of civil aircraft family
Meng Wengong, Ma Dongli, Cui Fei
2013, 39(2): 210-214.
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There has been a pattern transform from single model to family with multiple models for the civil aircraft-developing concept. According to the strategies of modularization and generality,the aircraft family design method was developed. The design principle of the main parameters and the economic de...
Stability region for closed-loop pilot-vehicle system with actuator rate saturation
Cao Qimeng, Li Yinghui, Xu Haojun
2013, 39(2): 215-219.
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Abstract:
To solve advanced warplanes flight safety problem caused by category Ⅱ pilot induced oscillations(PIOs), the stability region of closed-loop pilot-vehicle system with actuator rate saturation was studied. The nonlinear model of closed-loop pilot-vehicle system was built. The augmented state variable...
Application of the trihedral corner reflector in RCS calibration test
Ou Naiming, Bai Ming, Liang Bin, Miao Jungang
2013, 39(2): 220-224.
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The scattering properties of the trihedral corner reflector was analyzed, and its application plans in monostatic radar cross section(RCS) calibration test and transmit-receive separate monostatic RCS calibration test were proposed based on the analysis. The main lobe of the backscattering pattern o...
Rapid large frequency offset estimation for DTMB system
Zhang Shuai, Zhang Xiaolin
2013, 39(2): 225-229.
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Abstract:
A frequency synchronization algorithm for digital terreslrial television multimedia broadcasting (DTMB) system with a large frequency offset was developed. The estimated frequency offset was obtained by differential correlation between received pseudo noise (PN) sequence and local PN sequence based ...
Prediction of lunar rover's moon tractive performance based on similitude theory
Li Meng, Gao Feng, Sun Peng, Cui Ying
2013, 39(2): 230-234.
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Abstract:
Similitude theory was introduced to study the wheel-soil interaction system of lunar rover, the terramechanical similitude model of the system was created. To predict a lunar rover's tractive performance under moon gravity, a model experimental method was presented based on lunar soil's lower cohesi...
Effect on the characteristic of silicon drift detector by electron exposure
Zhang Binquan, Wei Fei, Leng Shuang, Wang Shijin
2013, 39(2): 235-238.
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Abstract:
Detection characteristics of the silicon drift detector (SDD), which is used in the new generation of solar x-ray detector onboard FY-2 satellite, might change due to the exposure of long-term high-energy electron radiation. To test the effect on its energy resolution, efficiency, signal amplitude a...
Conceptual design optimization of stratosphere airship based on improved CO-RS
Liang Haoquan, Zhu Ming, Jiang Guangtai, Wu Zhe
2013, 39(2): 239-243.
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An improved collaborative optimization based on response surface(CO-RS) methodology was developed to be well applied to the engineering design. The response surface was constructed independent on gradient by augmented Lagrange and trust region optimization methods. System mission requirements and di...
Anti-TBM task iteration convergence characteristics with resource constraint
Dong Tao, Liu Fuxian, Li Xiang, Zhang Hui
2013, 39(2): 244-247.
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Abstract:
In order to improve anti tactical ballistic missile (ATBM) task implement efficiency,ATBM task about total amount model and iteration convergence rule were studied.Interaction level between tasks was described based on task transform matrix.Task amount completion proportion parameter was introduced ...
Parametric analysis on hybrid plain woven fabric laminates repaired by full depth scarfing
Liu Sui, Guan Zhidong, Guo Xia, Xi Guofen
2013, 39(2): 248-253,263.
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Based on the software of ABAQUS,a finite element model was developed in the study of simulating the ultimate tensile strength and failure mode of repaired specimens. To certify the validation of the model, an experimental study was carried out on intact and repaired laminates. The calculated results...
Dynamic image processing method of droplets impingement characteristics measurement
Liu Danyang, Han Yahui, Wang Chao, Yang Chunxin
2013, 39(2): 254-258.
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Test cylinders were made up by gypsum. Dying process videos at different locations on test cylinders were collected. A complete test was divided into three ages: sub-dyed, balanced and over-dyed according to the color increase on stagnation point. The relationship between RGB colourity and the local...
Experiment investigation on the effect of heat treatment on metal rubber mechanical properties
Liu Baolong, Ma Yanhong, Zhang Dayi, Hong Jie
2013, 39(2): 259-263.
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The relief annealing was applied to the metal rubber forming process to clear the residual stress in wires and obtain stable mechanical properties. The quasi-static experiments were conducted to study the effect of relief annealing on the metal rubber in both free and precompression conditions. The ...
CFD numerical simulation of cryogenic propellant vaporization in tank
Chen Liang, Liang Guozhu, Deng Xinyu, Hu Wei
2013, 39(2): 264-268.
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Abstract:
Simulation on heat and mass transfer in propellant tank was performed to investigate influence of cryogenic propellant vaporization on tank pressure and propellant temperature. The simulation was concerned with heat transfer between propellant tank and external environment, propellant free convectio...
Support-vector-based iteratively adjusted centroid classifier for text categorization
Wang Deqing, Zhang Hui
2013, 39(2): 269-274.
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To address the lackness of centroid-based classifier (CC) that is prone to generate inductive bias or model misfit, a support-vector-based iteratively-adjusted centroid classifier (IACC_SV) was proposed, which employs support vectors found by some routines, e.g., linear support vector machines (SVMs...
Adaptive dynamic surface control for aircraft flight path angle
Guo Yi, Liu Jinkun
2013, 39(2): 275-279.
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For the feature that aircraft longitudinal dynamics include parametric uncertainties and external disturbances, an adaptive dynamic surface controller was proposed for flight path angle. Dynamic surface control method eliminated the problem of "explosion of complexity" existing in traditional backst...
Electrochemical preparation of Ag nanostructures and their surface enhanced Raman scattering effects
Sun Jie, Xu Di, Diao Peng, Yin Penggang
2013, 39(2): 280-284.
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Ag nanostructures were successfully prepared on indium tin oxide(ITO) surfaces through electrochemical deposition. These nanostructures possessed uniform morphology. The concentration of AgNO3, the nucleation potential, the growth potential and the addition of sodium citrate greatly affected the mor...

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