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2012 Vol. 38, No. 9

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Real-time path planning to track moving target in complex environments for UAV
Liang Xiao, Wang Honglun, Cao Menglei, Guo Tengfei
2012, (9): 1129-1133.
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In complex environments, when unmanned aerial vehicle (UAV) tracks a moving target, there are some defects on real-time capability and feasibility in the existing algorithm of path planning. A new heuristic direction of the rolling window was designed to make route search and track moving target. In...
Observability analysis of transfer alignment of airborne weapons
Qin Feng, Zhan Xingqun, Zhan Lei, Zhang Yanhua
2012, (9): 1134-1138.
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The velocity and attitude selected as measurements were used to design transfer alignment system of airborne weapons. The dynamic error models and measurement models of system were established, and Kalman filter was designed based on these models. The observability analysis of piece-wise constant sy...
Calculation and analysis of electric-powered helicopter flight performance
Nie Zi, Chen Ming
2012, (9): 1139-1143,1153.
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Based on the traditional method, a calculation method of electric-powered helicopter flight performance was proposed, which combined with the features of electric-power system and the characteristics of helicopter preliminary design. The influence of different variables and parameters on flight perf...
Error analysis of space stabilized strap-down inertial navigation system on stationary base
Sun Feng, Wang Gen
2012, (9): 1144-1148.
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In order to satisfy the technical index of strap-down inertial navigation system and the precision of inertial components, the error propagation characteristics of the space stabilized strap-down inertial navigation system have been analyzed. The scheme of space stabilized inertial navigation system...
New techneque for multi-missile cooperative localization
Liu Juncheng, Zhang Jingjuan, Tan Lifen
2012, (9): 1149-1153.
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One of the key technologies in multi-missile cooperative combat (MCC) is the missile precision positioning technology. In the environment of system-of-systems combat, multi-missile cooperative localization (MCL) based on mutual rangings was proposed to improve the inertial positioning accuracy of th...
Controller design for limit protection of aero-engine based on ADRC
Wang Yuan, Li Qiuhong, Huang Xianghua, Zhao Yongping
2012, (9): 1154-1157.
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This controller is designed to monitor and control the specific variables while the aero-engine is running. It can perform engine protection if the signals exceed their maximum allowance. The active disturbance rejection control (ADRC) was proposed to design the limit protection controller. Advantag...
Design of multi-stage nested wiener filter employing Krylov subspace for anti-interference
Fan Guangwei, Yu Baoguo, Deng Zhixin, Yang Peng
2012, (9): 1158-1162.
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Space and time anti-interference for global navigation satellites system (GNSS) receivers requires good real-time processing ability. This limits the application of conventional matrix inversion algorithms due to their large amount of computation. Based on the analysis of the principle of multi-stag...
Simulation method of ionospheric effects on spaceborne SAR using multiple phase-screen technic
Li Li, Zhang Yongsheng, Dong Zhen, Liang Diannong
2012, (9): 1163-1166.
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Spaceborne P band SAR echo affected by the ionosphere was simulated using a multiple phase screen (MPS) method. Ionospheric dispersion effects, phase scintillation and amplitude scintillation were included in the simulated echo. The ionosphere was modeled into several thin screens which only changes...
Analysis methodology of interference from radar to spectrum spread communication system
Wang Lei, Xie Shuguo
2012, (9): 1167-1171.
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Radar is one of severe interferences for spread spectrum communication system. A time-symbol level interference analysis methodology from radar to spread spectrum communication was proposed. Firstly, the electromagnetic interference mechanism from radars to spectrum spread communication system was a...
Reduction of PAPR using companding with pre-distortion
Li You, Zhang Xiaolin, Xiao Xin
2012, (9): 1172-1175.
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To solve the conflict between peak to average power ratio (PAPR) and bit error ratio (BER) in companding, a joint companding pre-distortion (PD) method was proposed. The closed form expression of subcarrier signal to noise ratio (SNR) of orthogonal frequency division multiplexing (OFDM) signal, whic...
Error correction code for Flash memory
Kang Wang, Zhang Youguang, Jin Lingxu, Wang Mingbang
2012, (9): 1176-1180.
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Abstract:
Flash memory is a non-volatile storage device, as the technology continuously scales down and storage density requirement increases up, the storage reliability and lifetime of flash memory become two of the most serious challenges. According to the multi-level cell (MLC) NAND Flash structural featur...
Quaternion based switching filter for impulse noise removal in color images
Geng Xin, Hu Xiaoguang
2012, (9): 1181-1185.
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Abstract:
A novel color pixel distance based on the quaternion unit transform was proposed to quantify the intensity and chromaticity differences between two color pixels simultaneously. A quaternion switching filter was presented to suppress the impulse noise in color images based on the aforementioned dista...
Dynamic phase-contrast microscopy of living cells by digital holography
Liu Shuo, Pan Feng, Xiao Wen
2012, (9): 1186-1188,1193.
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A digital holographic approach for dynamic phase-contrast microscopy of living cells was proposed. Fiber optic devices and individual optical components were adopted to set up a pre-magnified off-axis digital holographic imaging system. An infinity-corrected microscope objective was utilized to impr...
ROSAR imaging algorithm based on frequency analysis
Yang Ke, Liao Guisheng, Xu Qing, Zhang Xiangyang
2012, (9): 1189-1193.
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Abstract:
In the existing imaging algorithms for synthetic aperture radar with rotating antennas (ROSAR), the methods based on the Taylor series expansion of the slant range suffer from mismatch problems in azimuth. In addition, the time-domain convolution method cannot rapidly correct the curvature. In the p...
Design of decentralized robust attitude controller for hypersonic sliding vehicles
Li Jingjing, Ren Zhang, Shen Zhen
2012, (9): 1194-1199.
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Based on the mission and aerodynamic features of hypersonic sliding vehicles, the control-oriented model was built by taking first-order actuator dynamics into account. The decentralized robust attitude controller for re-entry flight incorporated the idea of decentralized control and sliding mode co...
Evaluation method for the receiver sensitivity requirement of CATR with single reflector
Ou Naiming, Bai Ming, Liang Bin, Miao Jungang
2012, (9): 1200-1204.
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Abstract:
Based on the Lorentz reciprocity theorem, a novel method was proposed for evaluating the receiver sensitivity requirement of compact antenna test range (CATR) with single reflector. Through calculating the near fields that excited by the feed of the CATR and scattered by the standard calibration sph...
Parameter matrix-based approach to computing all minimal hitting sets
Wang Dong, Feng Wenquan, Li Jingwen, Zhao Qi
2012, (9): 1205-1209.
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Abstract:
Computing all minimal hitting sets is one of the key steps in model-based diagnosis. Because of the limitations of parameterized algorithms and the low capabilities due to the expansion of state space in large-scale system diagnosis, a generalized minimal hitting-set algorithm named matrix-based min...
Design of data-aided symbol timing and carrier synchronization loop
Yan Hui, Zhang Zhongpei
2012, (9): 1210-1213.
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Abstract:
Considering the problem of joint symbol timing and carrier estimation with high complexity for burst communication systems, a data-aided synchronization algorithm was proposed. First, the matched filter was implemented by the architecture of polyphase filter bank which avoids the use of interpolatio...
Correlation between Rayleigh-Somerfield diffraction and physical optics integration
Liang Bin, Bai Ming, Jin Ming, Miao Jungang
2012, (9): 1214-1218.
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Abstract:
To calculate the propagation of electromagnetic field in quasi-optics, the internal consistency and distinction between different approaches were researched respectively from Rayleigh-Somerfield scalar diffraction integration and vectorial physical optics integration. The two integration methods wer...
GPS position solution algorithm based on the optimization theory
Zhao Xin, Qin Honglei, Lang Rongling
2012, (9): 1219-1223.
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In order to solve the problems of the traditional positioning solution methods, a new position solution method which was maximum a posteriori estimation based on the optimization theory was put forward. The basic principle of the method was introduced, and the derivation of the algorithm was detaile...
Application of PS-InSAR to monitoring Berkeley landslides
Lei Ling, Zhou Yinqing, Li Jingwen, Rol
2012, (9): 1224-1226.
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To monitor Berkeley hills landslides,stacks of ERS1/2, Radarsat-1 and TerraSAR-X spaceborne SAR data ordered between 1992 and 2010 were utilized by an advanced interferometry method, persistent scatterer interferometry synthetic aperture radar (PS-InSAR). Differential interferometry processing was f...
Simulation of 94 GHz radial helix waveguide travelling wave tube
Wang Shaomeng, Duan Zhaoyun, Wei Yanyu, Gong Yubin
2012, (9): 1227-1229.
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Abstract:

A novel slow wave structure with low work voltage, high work current, compact structure was proposed by using radial helix waveguide.The dispersion and transmission character was analyzed, and its work voltage was obtained, which could be as low as several hundred Volts.As the emitter face of cylind...
Selection for signals of opportunity based on affinity propagation clustering method
Zheng Lei, Zhang Jun, Xue Rui
2012, (9): 1230-1234,1266.
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Abstract:
The navigation method with signals of opportunity (SOOP) in the complex low airspace was introduced. Then a selection algorithm for SOOP was presented to solve the problem, which was hard to choose for the types of SOOP were various and the number of SOOP was so many. More less geometry dilution of ...
Content aware image distance measure for joint use of seam carving and non-homogeneous warping
Cao Lianchao, Si Nong, Gao Meiqin, Wu Lifang
2012, (9): 1235-1239.
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Abstract:
A content aware image distance measure for joint use of seam carving and warping was proposed. Firstly, important pixels in the original image were extracted. After a seam was removed, the important pixels were updated. For the preserved important pixels, the average difference of sub images (ADSI) ...
Multi-layer parallel simulation for complex system based on extended Modelica
He Dongjing, Song Xiao, Zhang Lin, Li Tan
2012, (9): 1240-1244.
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Abstract:
To improve multi-disciplinary modeling and simulation (M&S) efficiency for complex systems, and overcome the shortcoming of no parallel mechanisms in current multi-domain M&S languages like Modelica, a multi-layer parallel framework for complex system simulation was proposed. Parallel mechan...
Semi-regular triangular mesh subdivision surface reconstruction
Chen Tiantian, Zhao Gang
2012, (9): 1245-1249.
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Focusing on mesh reconstruction problem of reverse engineering, a subdivision surface reconstruction method to reproduce a semi-regular triangular mesh while preserving the sharp feature was proposed, which can make full use of the multiresolution analysis of subdivision surface. Firstly, the base m...
Method of bond graph for distinguishing power flow of closed planetary gear train
Li Qingkai, Tang Dewei, Jiang Shengyuan, Deng Zongquan
2012, (9): 1250-1254.
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In order to distinguish the power flow of the closed planetary gear train more simply and clearly, the theory of bond graph was applied for the analysis of power flow of the gear train utilizing the characteristic of conversation of energy and power fluxion of bond graph. Taking the power regurgitan...
Formal specification of dynamic fault tree based on sequence failure symbol
Wang Bo, Liu Dong, Li Yi
2012, (9): 1255-1260.
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The formal framework of the sequence failure symbol (SFS) was defined, including definitions, properties, rules and theorems, which is the basis of the formal specification for dynamic fault tree (DFT). Under the formal framework of the SFS, formal specifications methods and automatic conversion alg...
Production plan and control of manufacturing system based on simulation
Zhong Meiying, Liu Zhixin
2012, (9): 1261-1266.
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Based on the analysis on production plan and schedule data of the modern manufacturing procedure, the objected-oriented simulation system model for job-shop was established using objective-oriented method. From the viewpoints of manufacturing cell and job shop, the simulation procedure and control p...
Effect of twist on permeability of the sewing thread
Liu Qian, Zhao Yan, Duan Yuexin, Luo Ji
2012, (9): 1267-1270.
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An accurate assessment of the axial permeability of sewing thread with different twists was presented. Meanwhile, the dimensions of the sewing threads with different twists and their interface with resin were discussed by the scanning electron microscope technology. The experimental results show tha...

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