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2012 Vol. 38, No. 3

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Rapid cockpit configuration design method research
Feng Haocheng, Luo Mingqiang, Liu Hu, Wu Zhe
2012, (3): 285-290,296.
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In order to improve the efficiency of civil airplane design in conceptual design phase, the design method of civil airplane-s cockpit was studied. The functionality was achieved in an open aircraft conceptual/preliminary design system. The coordinate of fuselage was defined. The method of defining e...
Resource allocation scheme under rain fading in multi-beam mobile satellite systems
Yu Jia, Zong Peng
2012, (3): 291-296.
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An efficient dynamic resource calculation algorithm applicable to satellite networks was presented. The rain attenuation was taken into account, and adaptive forward error correction(FEC) coding technology was used to mitigate the decrease in signal to noise ratio caused by rain. In order to guarant...
Extended three-step focusing algorithm for spaceborne sliding spotlight SAR image formation
Yang Wei, Li Chunsheng, Chen Jie, Wang Pengbo
2012, (3): 297-302.
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Aimed at spaceborne sliding spotlight synthetic aperture radar(SAR) imaging mode, the hybrid factor was analyzed and amended along the range direction combined the geometry model firstly. Based on the analysis, the Doppler bandwidth of both single target and whole scene were researched, and the vali...
Design and analysis of interception project for multiple kill vehicle interceptor
Xie Yu, Liu Luhua, Tang Guojian, Cui Junfeng
2012, (3): 303-308.
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The multiple kill vehicle (MKV) interceptor consists of a carrier vehicle and some small kill vehicles that can intercept targets independently. It is capable of solving the difficulties of traditional kinetic energy interceptor, such as multiple targets identification and interception. The intercep...
Secondary flow thrust vector control study for fluidic throat nozzle
Zhang Jianhua, Xie Kan
2012, (3): 309-313,318.
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The secondary flow vector control concept for the fluidic throat nozzle of solid rocket motor was studied. Through numerical simulation, the work condition of concurrent thrust modulation and vector control was analyzed, in which there exist secondary flow at the throat and expansion part meanwhile....
Design of adaptive flight control system for aircraft with center of gravity variations
Zhang Jing, Shen Gongzhang, Yang Lingyu
2012, (3): 314-318.
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Due to the center of gravity varying over a specific range, the aircraft may deviate from its known dynamics, thus bringing special problems to the attitude control system. To overcome the limitation of accurate mathematical model and poor robust performance of conventional methods, a new design app...
High-accuracy quick-reaching sliding mode variable structure terminal guidance law
Song Yuanyun, Chen Wanchun
2012, (3): 319-323.
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A variable structure terminal guidance law with adaptive quick-reaching law and a filter approach based on sliding mode observer was developed for short time interception. During the ideal and non-ideal condition with typical target maneuvers, the simulation results demonstrates the higher accuracy,...
Signal scaling strategies for motion-base spaceflight simulators
Chen Wei, Jiang Guohua, Chao Jiangang
2012, (3): 324-329.
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When input signal is scaled in a large scope, the third-degree polynomial scaling is easy to induce signal distortion and complicated for parameters tuning, and the trigger speed of Hermite scaling is too slow to satisfy the condition. Based on this situation, two methods were put forward: the scali...
Numerical simulation of ice accretion on helicopter rotor
Zhong Guo, Cao Yihua, Zhao Ming
2012, (3): 330-334,339.
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In order to study the prediction of ice accretion on helicopter rotor, a theoretical rotor icing model was founded based on the computational fluid dynamics (CFD) technique by analyzing the theory of ice accretion and helicopter flight. Euler two-phase flow theory was used in solving the governing e...
Analysis and correction on relativistic effect of inter-satellites using dual one-way ranging/time synchronization
Sun Wenchao, Chang Qing, Xu Yong, Qi Wei
2012, (3): 335-339.
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The calculation of dual one-way ranging/time synchronization (DOWRT) between dynamic satellites was analyzed. In addition, relativistic effect on ranging/time synchronization was presented. A calculation with relativistic correction of DOWRT was proposed. Measurement errors of ranging/time synchroni...
Modified-PCNN based detection of gyroscope pivot surface defects
Zhao Huijie, Ge Wenqian, Li Xudong
2012, (3): 340-344.
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Pulse coupled neural networks (PCNN) differs from traditional neural networks. PCNN can be applied to image processing without training. There are many structure parameters in PCNN model, and it is difficult to determine these parameters by manually trying. The model structure was improved by simpli...
Error propagating characteristic analyzing for rotating LG INS
Yin Hongliang, Yang Gongliu, Song Ningfang, Wang Lifen
2012, (3): 345-350.
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Understanding the mechanism of rotation modulation error auto-compensation and grasping the characteristic of front-to-back error propagating are the utmost important jobs for the design of a rotating inertial navigation system (INS). Basing on these, a reasonable rotation scheme can be designed and...
Mechanism parameters optimization of bionic frog jumping robot based on velocity directional manipulability measure
Hu Shenghai, Yang Qi, He Lei, Tan Xiangquan
2012, (3): 351-356.
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The improvement of jumping performance of bionic frog jumping robot was pursued in view of the mechanism design, taking velocity directional measure as an evaluating index of jumping performance. On the basis of bionic frog jumping robot mechanism model, kinematic equations in takeoff phase were est...
Effect of gas species on fire extinguishment using two phase flow
Yang Lijun, Zhao Jianbo, Liu Yuxin
2012, (3): 357-362.
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In the fire extinguishment system by using two phase flow, when the gas phase uses different gas species, the fire fighting effects are different. Four gases were used as the gas phases like air, nitrogen, carbon dioxide and argon. The experiments were conducted in a room measured by 3.6 m 4.6 m 3.9...
Adipic-sulfuric acid anodizing for LY12CZ aluminum alloy
Yu Mei, Chen Gaohong, Liu Jianhua, Li Songmei
2012, (3): 363-367,379.
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Adipic-sulfuric acid anodic oxidation was improved by adding hexane diacid into sulfur acid anodic bath solutions for LY12CZ aluminum alloy, and compared to conventional sulfur acid anodic oxidation. The morphology of two kinds of oxide films was observed by using filed emission-scanning electron mi...
Framework for multi-resolution modeling based on BOM and FEDEP
Li Yuan, Li Bohu, Hu Xiaofeng, Chai Xudong
2012, (3): 368-373.
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To normalize and generalize representing multi-resolution models (MRMs) and the process as well as the activities in multi-resolution modeling (MRM), a framework for MRM based on base object model (BOM) and federation development and execution process (FEDEP) was put forward. The framework is compri...
Dressing process and parametric optimization of cup-shaped vitrified CBN wheels
Liu Jia, Chen Wuyi
2012, (3): 374-379.
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Influences of dressing parameters on grinding temperatures, grinding forces and surface roughness in grinding TC 4 with cup-shaped CBN wheels dressed with a diamond roller under dry condition were investigated through experiments. Grinding temperatures and surface roughness were analyzed adopting re...
New automatic regulation system of electron beam welder cathode heating source
Xu Guoning, Qi Bojin, Liu Fangjun, Dai Hailin
2012, (3): 380-383.
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One new electron beam welder cathode heating current automatic control system was developed, which includes new main circuit topology and corresponding control strategy, and it can make cathode be optimal heating current status and improve electron beam stability. At the same time, cathode heating c...
Simulation of progressive damage on composite structure under hydro/thermo/mechanical coupled condition
Liu Yujia, Yan Ying, He Mingze, Qi Zhongxin
2012, (3): 384-388,393.
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A tracking method of progressive damage on composite structure under the hydro/thermo/mechanical coupled condition was developed. The finite element model was built considering the random distribution of mechanical properties. Constitutive relation of composite material under hygrothermal condition ...
Mode shape functions of free paraboloidal thin shells
Wang Xinjie, Yue Honghao, Deng Zongquan
2012, (3): 389-393.
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Based on the membrane theory, a set of mode shape functions for paraboloidal thin shell with free boundary condition were formulated. Low mode shapes of free paraboloidal thin shell were obtained by the way of modal experiment analysis. The theoretical mode shapes based on the mode shape functions w...
Low complexity improved SLM algorithm for PAPR reduction in PLC system
Chen Ke, Hu Xiaoguang
2012, (3): 394-399.
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A reduce peak-to-average power ratio (PAPR) algorithm was proposed aim at the slow-variant and complex noise of channel. The partial data within the original data sequence were scrambled by circularly shifting to obtain a set of new data sequences. Each new data sequence tail was inserted the corres...
Open-loop memory polynomial pre-distorter based on look-up table
Yang Youfu, Zhang Qishan, Liu Jianwei, Xiu Chundi
2012, (3): 400-404.
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An open-loop memory polynomial pre-distorter based on look-up table was proposed. Both memory polynomial model(MPM) pre-distorter coefficient estimates and the implementation of signal pre-distortion processing were considered. First, with the complementarity on the transmission characteristics for ...
Analysis on energy-saving operation of screw compressor under load/unload operating conditions
Kong Dewen, Lin Weiqin, Cai Maolin, Qin Hongbo
2012, (3): 405-409.
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Air compressor power consumption was described. Based on analyzing screw air compressor volume flow efficiency under discharge pressure fluctuation conditions, the screw air compressor volume flow formula was obtained, and power consumption mathematic model were established also. Under load/unload o...
Modeling and simulating of planar multi-body systems with rolling resistance and Coulomb friction
Cao Jie, L? Jing, Wang Qi
2012, (3): 410-415.
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To study the planar multi-body systems with rolling resistance and Coulomb friction, the generalized mechanics model with a number of rigid bodies and disks was established and the dynamical equations of the system were derived from Lagrange-s equations of the first kind in Cartesian coordinate. In ...
Automatic dimensioning of 3D model based on GB/T 24734
An Heng, Yan Guangrong, Lei Yi
2012, (3): 416-421.
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To meet the requirements of manufacturing enterprises, the automatic dimensioning of 3D model in CAD system was investigated based on the national standard GB/T 24734. The algorithms of automatic dimensioning of 3D model were proposed, and the strategies of datum recognition, features simplification...
Composite damage analysis subjected to low-velocity impact
Liu Debo, Guan Zhidong, Chen Jianhua, Li Zengshan
2012, (3): 422-426.
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A new type of zero-thickness cohesive element model was proposed to study the composite interlaminar damage. The delamination propagation of laminates subjected to low-velocity impact can be prediceted accurately by the model. The model consisted of constitutive relationship, damage criterion and da...

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