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2013 Vol. 39, No. 4

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Longitudinal flying qualities evaluation of UAV system in remote mode
Huang Chengtao, Wang Lixin
2013, 39(4): 427-431.
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The unmanned aerial vehicle (UAV) system model was established. According to the characteristics such as the communication data-link exists time delay, the UAV pilot can not directly feel the UAV g-load, etc, with the reference to piloted aircraft flight quality criterion, a means to evaluate the lo...
Application of ADRC technology in simulator frequency response servo
Fu Yongling, Long Manlin, Guo Dong, Niu Jianjun
2013, 39(4): 432-436.
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In simulator frequency response servo, there are some difficulties, including disturbance compensation when low frequency or low speed, a sharp deterioration of phase lag and amplitude attenuation when high frequency, the problem of conventional control strategy depending on high precise object mode...
Anti-vibration design and real-time filter methods for FOG IMU used in helicopter
Ren Yan, Fang Jiancheng, Xu Duan
2013, 39(4): 437-441.
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The bias error, nonlinear, non-gauss noise, and more arithmetic error of inertial navigation system was caused by vibration. It was a key technology to restrain the error caused by disturbance vibration. A novel method, which combining anti-vibrator and data filtering was proposed. A kinetics model ...
Stability analysis of coupled rotor/fuselage system of shipboard helicopter
Liu Yang, Xiang Jinwu
2013, 39(4): 442-446.
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A stability analysis of a shipboard helicopter which considers the asymmetric and nonlinear landing gears, is investigated to explore the coupled dynamic behavior between the rotor and helicopter. The shipboard helicopter uses bearingless rotor, and the model of the rotor considers the large deforma...
Adaptive control for aircraft anti-skid braking system based on friction force model
Li Fengyu, Jiao Zongxia
2013, 39(4): 447-452.
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The improvements of aircraft braking system reliability and efficiency are important for the safety promotion of a whole flight circle. The aircraft tire/runway friction force varies significantly on different types of runways (dry and wet, etc.), materials (asphalt and soft ground, etc.) and temper...
Gesture consistency of airplane target between static and dynamic measurements
Li Jinliang, Zeng Yonghu, Zhou Bo, Fu Haibo
2013, 39(4): 453-457.
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Gesture consistency of airplane target between static and dynamics measurements was studied.The most common coordinate systems in target characteristics measurement were introduced, and the translation relationships were presented. The typical relative position relationship between line of radar sig...
Improved multi-objective particle swarm optimization algorithm
Liu Baoning, Zhang Weiguo, Li Guangwen, Nie Rui
2013, 39(4): 458-462,473.
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In order to enhance the convergence and diversity of multi-objective particle swarm optimization algorithm, an improved multi-objective particle swarm optimization algorithm was proposed. The Kent mapping was used to initialize the population, and the target space was divided into several fan-shaped...
Layout optimization of civil airplane wing structure based on automated finite element modeling
Yan Weitian, Luo Mingqiang, Liu Hu, Wu Zhe
2013, 39(4): 463-468.
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Focusing on the widely-applied two spar wing structure on civil airplanes, a wing CAD model was created parametrically according to the numbers of its stringers and ribs. Then a wing structure finite element method(FEM) model was constructed automatically by Patran command language(PCL), it was real...
Method for linearize power function with three parameters of incomplete accelerated degradation data
Ma Xiaobing, Chang Shihua, Chen Yunxia
2013, 39(4): 469-473.
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A method was provided to linearize the power function with three parameters. It was in view of the nonlinear prediction with the incompletely accelerated degradation paths of null bias and scale factor of accelerometer. The method was based on the assumption that the exponential parameter of power f...
High-altitude heat transfer performance analysis for skin heat exchanger based on ground experiment
Dang Xiaomin, Pang Liping, Lin Guiping
2013, 39(4): 474-477.
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Facing to future high-power onboard electronic equipment cooling requirements for our country, it needs to develop a new onboard cooling technology to reduce the dependence on traditional environmental control system. A new gas-gas skin heat exchanger was studied for aircraft thermal management of e...
Global optimization of classified composite laminated structures based on genetic algorithms
Liu Zhenguo, Hu Jie, Hu Long
2013, 39(4): 478-483.
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A technique of global optimization aimed at composite laminated structures with high variety in distribution of stress was proposed. Under the consideration of connection and the efficiency of computation, the structure laminates were divided into regions with particular global layers and region lay...
Comparation of the bonding through sintering between Ag nanoparticle paste and Ag microparticle paste
Zhu Ying, Tang Shanping, Yan Jianfeng, Zou Guisheng
2013, 39(4): 484-487.
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The Ag nanoparticle paste with diameter of 20~80nm and the Ag microparticle paste with diameter of 1~3μm were used to bond Ag coated Cu discs. The shear strength was evaluated using the physical simulators Gleeble 1500D. Microstructure of the joint was studied with scanning electron microscope (SEM)...
Assessment of monotonicity-preserving scheme for large-scale simulation of turbulence
Cui Jian, Fang Jian, Yuan Jingzhou, Lu Lipeng
2013, 39(4): 488-493.
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The high-order shock-capturing schemes were assessed by comparing the Monotonicity-Preserving scheme proposed by Suresh and Huynh (1997) with the weighted essentially non-oscillatory schemes(WENO). Great emphasis was imposed on the analysis of the performances of Monotonicity-Preserving scheme for t...
Engineering analysis of post-buckling loading capability for composite stiffened panels
Wang Feifei, Cui Degang, Xiong Qiang, Luo Xiaoqiang
2013, 39(4): 494-497.
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A project simplified theory and a method of calculating post-buckling loading capacity of composite stiffened panels based on the basic mechanics characters of composite materials were presented, which combining with FEM theory and engineering experience. Composite J-stiffened panels were taken as a...
Application of fuzzy discrimination in reliability accelerated testing
Zheng Feng, Ai Jun, Shang Jingwei, Wang Jinhui
2013, 39(4): 498-502.
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Based on the fundamental feature of software reliability testing (SRT), similarity exited between the SRT test cases was analyzed. A serious theory in fuzzy mathematics was used to deal with the data character of test case. A new complementary fuzzy discrimination method was put forward to judge the...
Approach based on particle filter and uncertainty graph to diagnosis for dynamic systems
Wang Dong, Li Jingwen, Feng Wenquan, Zhu Nan
2013, 39(4): 503-507.
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In model-based diagnosis of dynamic systems, the scale of state space is exponential to both the number of components and time-steps. K-Best enumeration considers only K states with maximum probabilities at each time-step, which reduces the enumeration space. But state updating is not feasible when ...
Determination and application of coarse-grain critical pre-strain curve to aluminum alloy stretch forming
Wang Kun, Wan Min, Hua Cheng, Shao Xufen
2013, 39(4): 508-511,516.
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Coarse-grain is one of the main defects in multistage stretch forming of airplane skins for aluminum alloy. An experiment of different strain paths to 2024-O aluminum alloy was designed according to the deformation state and process in skin stretch forming. The experiment process was pre-stretch, qu...
Curing kinetics of epoxy resin modified with nano-particles and surface strength properties and friction coefficient
Song Qichao, Zhou Zhen, Yang Chunguang
2013, 39(4): 512-516.
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The surface strength and tribological properties of epoxy resin were modified with addition of alumina nano-particles and rubber nano-powders. The curing kinetics and the surface strength properties of epoxy nanocomposites were investigated by differential scanning calorimeter (DSC) and dynamic ultr...
Improved algorithm of tracking moving objects under occlusions
Zhao Long, Xiao Junbo
2013, 39(4): 517-520.
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To better settle the problem of tracking objects under occlusions, an improved anti-occlusion tracking algorithm was proposed, based on the combination of motion prediction and adaptive multi-block template matching. The algorithm constituted the principle of detecting occlusions and the method of u...
Analysis of error output characteristics of DRLG
Wang Chenchen, Wang Xinlong
2013, 39(4): 521-524,530.
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Dither structure is the key part of dithered ring laser gyroscope (DRLG), and the dither parameters directly affect its error output characteristics. In order to choose the best dither parameters and improve the measurement accuracy of this gyroscope, the effects of dither parameters on error output...
Interval analysis method for uncertain aerodynamic loads computation
Huang Ren, Qiu Zhiping
2013, 39(4): 525-530.
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The aerodynamic lift prediction problem of micro air vehicles in atmosphere due to continuous gust was studied. The uncertain von Karman spectrum parameters were expressed in the interval forms. Taking into account the uncertain flight condition, an interval analysis method was proposed to calculate...
Ultra-low power bulk-biased mixer with current-reuse
Shen Jing, Zhang Xiaolin
2013, 39(4): 531-534.
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Using the approaches of folded switching stage and self-biased transconductance stage, a mixer operating at supply voltage down to 0.6V was designed. The bulk-biased topology was used to achieve ultra-low supply voltage and ultra-low power consumption while the current-reuse technique was selected t...
Design of chip-scale quantum interferometric magnetometer in marine environment
Guan Lijuan, Kang Zhihui, Wang Zengbin
2013, 39(4): 535-539.
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With the development of the marine environment survey, marine magnetic survey demands magnetometers with micro-size, high-precision magnetometer. The several common weak magnetic field measurement instruments were described, and an analysis of a magnetometer based on dual light-field quantum interfe...
Experimental validation of non-local property of impedance of viscoelastic material
Jin Zhongkun, Wang Tongqing, Yang Mingsui, Wang Jin
2013, 39(4): 540-543.
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Based on the definition of transmission impedance the local and non-local properties of viscoelastic material and the relationships between the impedance matrix and the frequency response matrix were described. The expression of frequency response function was derived by discretizing the acoustic pr...
Control of fuel flow-rate supply system in high-speed airflow thermal simulation tunnel
Cai Chaozhi, Li Yunhua, Teng Fengjian
2013, 39(4): 544-548.
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According to the requirements of high speed airflow thermal tunnel simulation experiment system for fuel supply system, a fuel supply system based on variable frequency speed-regulating and bypass proportional throttle valve regulating was designed. After the analysis of the characteristics of every...
Effect of heat treatment on duplex microstructure and mechanical properties of PM TiAl alloy
Su Meike, Zheng Lijing, Zhang Hu, Lang Zebao
2013, 39(4): 549-552,558.
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Ti-46Al-2Cr-2Nb-(B,W)(at%) alloy prepared by powder metallurgy was direct heat treated and microstructures of the alloy were obtained by cooling at different cooling rates. Results show that duplex microstructure consisting mainly of fine equiaxed γ grains and lamellar colonies were obtained at cool...
Consumption forecasting of missile spare parts based on wavelet transform and revised GM-ARMA model
Zhao Jianzhong, Xu Tingxue, Ge Xianjun, Yin Yantao
2013, 39(4): 553-558.
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Aiming at the characteristic of missile spare parts consumption presenting "small sample and non-stationary", and to overcome the deficiency that traditional forecasting method builds models with abundant date sample,the combined forecast method based on wavelet transform and revised GM-ARMA was pro...
Energy-saving optimization for intelligent pumps based on performance reliability restriction
Huang Bochao, Wang Shaoping, Meng Yixuan, Shi Jian
2013, 39(4): 559-563.
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Considering the variable flight profile of aircrafts and variable pressure variable displacement characteristics of intelligent pumps, a method for multiple model performance reliability analysis was developed. The transfer function models of two types operating modes were derived, the primary influ...
Fault detection and identification for dual-redundant BLDCM system using FFT algorithm and expert system approach
Wang Xin, Zhou Yuanjun, Ma Qishuang
2013, 39(4): 564-568.
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A scheme was proposed to detect and identify faults of a dual-redundant brushless DC motor (BLDCM) system, in which high reliability and wide speed range control were required. In order to eliminate the effects of different speeds and different loads from the frequency spectrum, both of the existing...

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