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2013 Vol. 39, No. 9

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Dynamic modeling and stability analysis for underwater craft with wing
Ye Chuan, Ma Dongli
2013, 39(9): 1137-1143.
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The underwater craft with wing has a large lifting surface. The rolling movement is one of its basic maneuver models. The dynamic derivatives of an underwater craft with wing were studied using the computational fluid dynamics(CFD) method. The result shows that the viscous force and the interference...
Influence of adhesive properties on tensile behavior of scarf repaired laminates
Cheng Xiaoquan, Zhao Wenyi, Gao Yujian, Bao Jianwen
2013, 39(9): 1144-1149,1162.
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Tensile failure behavior of scarf repaired composite laminates was studied with non-linear three dimensional finite element modeling. The finite element method(FEM) results are in good agreement with the testing results, which verifies the established model validity. Based on it, the tensile strengt...
Analysis on acquisition method in spread spectrum TT&C system
Feng Wenquan, Liu Xi, Li Chunsheng
2013, 39(9): 1150-1156.
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In spread spectrum telemetry, tracking and command (TT&C) systems, the integrated baseband equipment has been occupying an important role due to its high flexibility. Limitations of traditional methods were analyzed concerning the complex demands of the integrated baseband equipment. On this bas...
Observability analysis of GPS/SINS ultra-tightly coupled system
Zhou Weidong, Cai Jianan, Sun Long, Zheng Lan
2013, 39(9): 1157-1162.
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The filter precision depends on the observability of system states. Various approaches were proposed to analyze the observability of the linear system states. Among those approaches, singular value decomposition (SVD) was commonly used to analyze the system beforehand owing to its computational simp...
Application of Mie-scattering theory in measurement of mean droplet diameter
Chang Shinan, Guan Zhangjie, Wang Chao, Zhuang Weiliang
2013, 39(9): 1163-1167,1191.
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In an ice wind tunnel experiment, in order to simulate the experimental environment more accurately, the diameter of droplets jetted from the nozzle need to be measured accurately accordingly. A set of laser device and drop diameter calculation program based on Mie-scattering theory were developed. ...
Mechanical principle of the deploying mode for coilable mast
Han Jianbin, Wang Xinsheng, Ma Haibo
2013, 39(9): 1168-1173.
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The coilable mast is a kind of space mast, and it can be used as many deploying mechanisms such as solar array, solar sail and detecting arm. The coilable mast has two deploying modes: local coil mode and helix mode. Based on the coilable mast with triangle-batten-form and hinges, the principle of t...
Fault diagnosis for sensors and components of aero-engine
Li Yebo, Li Qiuhong, Huang Xianghua, Zhao Yongping
2013, 39(9): 1174-1180.
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According to local learning and ensemble learning technologies, a method for sensors fault and abrupt components fault diagnosis of aero-engine was proposed based on support vector machine-extreme learning machine-Kalman filter (SVM-ELM-KF). The training approach of improved recursive reduced-least ...
Design of fuzzy T-S model of unmanned aerial vehicle in full envelope
Liu Zhi, Wang Yong
2013, 39(9): 1181-1186.
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The method of constructing fuzzy T-S model in full envelope was designed for the integrated flight control of unmanned aerial vehicle (UAV) in entire envelope. Based on the local linearization of non-affine system, the design of fuzzy T-S model was transformed to the optimization of the centers and ...
Failure analysis of reusable rocket engine coolant passage
Yang Jinhui, Chen Tao, Jin Ping, Cai Guobiao
2013, 39(9): 1187-1191.
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Through the creep nonlinear thermal-structure analysis of the reusable combustion chamber coolant passage under cyclic thermal and mechanical loading, comparison between kinematic and isotropic hardening results was made to study the hardening influence. Basing on those cyclic structure results, the...
Landing stability analysis of the lunar lander based on Monte Carlo approach
Song Shunguang, Wang Chunjie
2013, 39(9): 1192-1196.
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A multi-body touchdown dynamics simulation model was established for predicting landing performances of the lunar lander. Because of the uncertainty of the landing site and initial landing conditions of the lander at touchdown, a Monte Carlo dynamic analysis was performed to study the landing stabil...
Dynamic modeling and optimization of a typical disk-type check valve
Zhang Rui, Wu Shuai, Jiao Zongxia
2013, 39(9): 1197-1202.
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The characteristics of disk-type check valve are particularly sensitive to its reed parameters. Taking a typical reed with three curved-beams as an example, a general modeling and optimization method was investigated to improve the valve dynamic performances. An interpolation model of the reed relat...
Random error suppression technology of rotating FOG inertial navigation system
Zhou Bin, Wang Wei, He Xiaofei
2013, 39(9): 1203-1207.
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The impact of the gyro constant drift and accelerometer constant bias to the inertial navigation system (INS) can be reduced by rotation modulation technology, but the gyro random drift and noise can not be inhibited. The errors of INS will divergence under action of random disturbances, which affec...
Quantitative analysis method for mechanism severity of whole product
Yuan Hongjie, Zhang Ze, Wu Hao
2013, 39(9): 1208-1211.
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Due to qualitative method was used to analyze whole products with characters of complex failure mechanism and small samples, Bayesian method was proposed for quantitative analysis of failure mechanism severity. Firstly, Bayesian posterior density function was determined by prior information describe...
Analysis and computation on electromagnetic backscattering scattering coefficient of two-dimensional fractal sea surface
Wang Chungang, Feng Wenquan, Li Chunsheng
2013, 39(9): 1212-1217.
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Based on the existing two-dimensional fractal sea surface model, a novel electromagnetic backscattering coefficient model was derived in the HH and VV polarization mode, respectively. Average statistics of the backscatter coefficient from all resolution cells in some wavelength regions was computed ...
Experimental studies on fatigue crack growth rate at elastic-plastic state of aeronautical aluminum alloy
Zhang Jikui, Wu Liesu, Ma Shaojun, Liu Jianzhong
2013, 39(9): 1218-1221,1227.
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Studying the crack propagation behavior of the thin-walled structure with long cracks is very significant for ensuring the safety of the airframe. The specimen and fixture of aluminum alloy wide plate was designed for fatigue crack propagation rate (da/dN) testing. The fatigue crack growth rate was ...
Thermal control design and analysis for laser communication terminal
Meng Henghui, Tan Canghai, Geng Liyin, Li Guoqiang
2013, 39(9): 1222-1227.
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Laser communication terminal is a new signal transmission carrier. The equipment-s optics-device parts bring high heat dissipation, and require higher equality and stability of the temperature. It is a challenge for thermal control. According to the characteristic of the laser communication terminal...
Coning compensation algorithm with angular rate considering gyroscope frequency characteristics
Chen Yu, Zhao Yan, Li Qunsheng, Wu Hui
2013, 39(9): 1228-1232.
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Focusing on the gyroscopes- output is angular rate and has a certain frequency characteristics, a coning compensation algorithm considering the gyroscopes- frequency characteristics with angular rate as input was presented. The ideal and computed rotation vector increment was derived in the attitude...
Dimensionless study on outlet torque characteristics of an air powered engine
Yu Qihui, Shi Yan, Song Rongzhi, Cai Maolin
2013, 39(9): 1233-1237.
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Aiming at the process of an air powered engine, the energy equation, gas state equation, continuity equation and momentum equation were used to set up non-linear differential equations of an air powered engine(APE). By selecting the appropriate reference values, the basic mathematical model was tran...
Timing analysis system for real-time industrial Ethernet EtherCAT
Huan Ji, Liu Zhe, Jin Yang, Hu Xin
2013, 39(9): 1238-1242,1248.
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The characteristics of real-time industrial Ethernet(RTIE) were studied. A timing analysis system was proposed consisting of probe, monitoring PC and Timing-Analyzer software. Each of the passing frames was captured by the probe which includes one field-programmable gate array(FPGA) core. The inform...
Analysis on mathematical modeling for multi-source and multi-outlet complex compressed air pipe network
Gai Yushou, Shi Yan, Cai Maolin
2013, 39(9): 1243-1248.
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Array was used to build the structure mathematical model of the multi-source and multi-outlet complex compressed air pipe network. With the topology structure of the pipe network, the pressure dropping law and the linkage characteristics between the pressure and the flow of the compressed air in the...
Active integrated devices PDN vector fitting modeling method
Chen Xi, Xie Shuguo, Du Wei, Wei Ying
2013, 39(9): 1249-1253.
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Based on the vector fitting principle and circuit theory, a kind of active integrated device wideband circuit modeling methods for electromagnetic magnetic compatibility(EMC) simulation was proposed. The port parameters in DC bias obtained by measurements using vector fitting method were transformed...
Effects of jet injection angle in a flat transverse flow
Wu Meng, Eriqitai Wang, Mengjie, Du Jiangyi
2013, 39(9): 1254-1258.
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The computational and experimental studies were conducted to investigate the effects of the jet injection angle on the flat flow structure and its operating characteristics, the conclusions were made to apply on the fluidic control vectoring nozzle. The experiments were performed in a small wind tun...
Fast algorithm of Gram-Schmidt regression method
Wang Huiwen, Xia Bang, Meng Jie
2013, 39(9): 1259-1262,1268.
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A new multiple linear regression method was proposed which can screen the variables fast. In the modeling process, not only can it screen variables containing best information to explain the dependent variable, but also distinguish and test redundant variables in the model based on Gram-Schmidt orth...
Integrated navigation algorithm for low-cost navigator in the primary trainer
Liang Haibo, Li Hao, Si Wenjie, LÜ Zhanggang
2013, 39(9): 1263-1268.
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To solve the invalidation of integrated navigation algorithm due to low updating frequency of global positioning system (GPS) in the low-cost integrated navigation system, a new integrated navigation algorithm, based on modeling of the inertial devices and kinematic modeling of the carrier, was pres...
Structural analysis of giant magnetostrictive actuator
Li Lin, Chen Liangliang, Yang Yong
2013, 39(9): 1269-1274.
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The structure form of giant magnetostrictive actuator(GMA) was studied in both mechanics and magnetics to obtain the properties of GMA. The patterns of permanent magnet (to induce the bias-magnetic-field), materials of the actuator-s covering and their impact on stroke and stiffness of the GMA were ...
Effect of spraying power on microstructure and property of nanostructured thermal barrier coatings
Sun Youbei, Zhou Chungen
2013, 39(9): 1275-1278.
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Effect of air plasma spraying power on microstructure and thermal shock of nanostructured yttria stabilized zirconia (YSZ) thermal barrier coatings was investigated by scanning electron microscopy (SEM) and X-ray diffraction (XRD). It was found that there were two regions of melted phases and non-mo...

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