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2010 Vol. 36, No. 11

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New RAIM algorithm for identifying simultaneous double-faulty satellites
Zhao Lin, Li Liang, Cheng Jianhua, Lou Shangyue
2010, 36(11): 1261-1265.
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Because the traditional algorithms of satellite fault identification based on identifying threshold led to missed detection and false alarm, which reduced the correct identifying ratio, a new receiver autonomous integrity monitoring (RAIM) approach was proposed for identifying simultaneous double-fa...
Comprehensive evaluation of pilot operation procedures for commercial airliner
Wang Lijing, Guo Fenfei, He Xueli, Xiang Wei
2010, 36(11): 1266-1270.
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Mostly by an elaborate set of pilot operation procedures(POP) crew can control planes successfully. Pilot may operate wrong under the inconsistent or illogical procedures,which can cause accident in flight. Normal procedures of approach and landing phases which come from flight crew operations manua...
Effects of cylindrical hole accompanied with anti-vortex holes on film cooling effectiveness
Liu Xiaohong, Luo Xiang, Tao Zhi
2010, 36(11): 1271-1274.
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The primary focus was to further understand the flow and heat transfer aspects of a special film cooling hole arrangement where the main film cooling hole was accompanied by two parallel anti-vortex jet holes. The cooling effectiveness and the interaction between the main hot stream and the coolant ...
Continuous stiffness modeling of 3-RPS parallel kinematic machine with special composite spherical joints
Cui Xueliang, Han Xianguo, Chen Wuyi
2010, 36(11): 1275-1280.
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A comprehensive continuous modeling methodology of 3-RPS parallel machine under dynamic load condition was developed and presented by considering the stiffness of legs and joints. The variational Jacobian matrix was used through vector differential and equivalent mechanism technique. Based on the sc...
Performance analysis of IEEE-1394b bus isochronous transmission
Zhang Chunxi, Yang Yusheng, Wen Huaitao
2010, 36(11): 1281-1285.
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IEEE-1394b is a high speed data bus, which has been successfully utilized in avionics. Its isochronous transmission assures definite transmission delay of data, and is widely adopted in multimedia data transmission. To solve the performance evaluation problem of isochronous transmission, determinis...
Film cooling characteristics on pressure side of rotating turbine blade
Li Guoqing, Deng Hongwu, Xiao Jun
2010, 36(11): 1286-1289.
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Abstract:
Experimental investigations were carried on to indicate the rotating film cooling characteristics in a 1.5 turbine stage. The length of the tested blade in chordwise and spanwise was 124.3mm and 99mm respectively with a 4mm film hole in the middle span oriented 28° to the tangential of the pressu...
High accuracy data fusion of radar/infrared multi-mode guidance seeker with radar radome interference
Cao Xiaorui, Dong Chaoyang, Wang Qing, Chen Yu
2010, 36(11): 1290-1294.
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In order to improve anti-interference ability of radar/infrared multi-pattern composite guidance seeker with radome refraction, a new multiple model radome slopes estimate algorithm based on extended Kalman filter(EKF) was proposed in the three dimensional engagement scenarios. The slopes estimates ...
Lightweight and optimal design for 3-RPS parallel kinematic machine based on finite element method
Zhang Tianming, Han Xianguo
2010, 36(11): 1295-1298.
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The structure of the base platform and the links were optimized in order to reduce the mass and increase the stiffness of the 3-RPS parallel kinematic machine(PKM). The static stiffness of the PKM was analyzed with finite element method, using connector in the simulation of kinematic pair. From the ...
Characteristics analysis of solid-liquid ducted rocket
Qin Lizi, Liang Shuqiang, Liu Yu
2010, 36(11): 1299-1302.
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The solid-liquid ducted rocket (SLDR) has advantages of solid ducted rocket (SDR) as well as liquid fuel ramjet (LFR). In order to analyze the characteristics of SLDR, a mathematics model was established and several proper parameters were presented. The characteristics calculation method was present...
Optimal adjustment method of rotor multi-dimensional vibration
Wang Kang, Wang Shaoping, Liu Hongmei
2010, 36(11): 1303-1306.
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Considering characteristics of non-linear and difficult to model for the rotor system, helicopter rotor dynamic balancing adjustment models was established by radial basis function(RBF)neural network. According to the constraints, the fitness function was established by using the helicopter vibratio...
Analysis of aero engine vibration signal based on blind source separation technology
Qin Haiqin, Xu Kejun, Ou Jianping
2010, 36(11): 1307-1310.
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In order to improve the accuracy of vibration monitoring and fault diagnosis, a blind source separation frame which is combining mathematical morphology preprocessing and Fast ICA arithmetic was brought out based on the characteristics of dual rotors aero engine case vibration signal. It is that the...
EVA glove strength under low temperature and pressure
Liu Heqing, Ding Li, Yuan Xiugan, Li Jing
2010, 36(11): 1311-1314.
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Abstract:
In order to study the effects of combined stress of glove pressure and low temperature on astronaut operation strength during extravehicular activity (EVA), the maximum grip strength and grip fatigue were selected as two indicators to evaluate the strength of manual performance. Fatigue was evaluate...
Representation for RBAC model with description logic DLRBAC
Ma Li, Ma Shilong, Sui Yuefei
2010, 36(11): 1315-1319.
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A new description logic-based representation for role-based accesss control(RBAC) model was proposed. RBAC sets and relations were translated as concepts and roles in the description logic respectively. To express RBAC role default inheritance and constraint conditions, symbols that represented role...
Statistics on atomized feature of normal cloud model
Liu Yu, Li Deyi
2010, 36(11): 1320-1324.
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The cloud model atomization process was related to a larger hyper enctropy. Through statistical analysis of the overall trend of the cloud drops, the cloud drops dispersed over the course of hyper entropy increase. By analyzing the dispersion trend of cloud drops in each semantic ranges, it is indic...
Method for optimizing QFT robust control system
Jin Xianzhe, Wu Sentang
2010, 36(11): 1325-1329.
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A method for optimizing the quantitative feedback theory (QFT) robust controller was presented based on stochastic robustness analysis and design (SRAD) methodology, which solved the problems, such as inadequate robustness measures in existing optimization methods for QFT robust controller. With SRA...
Numerical investigation of phase change thermal control unit for portable electronic devices
Wu Bin, Xing Yuming
2010, 36(11): 1330-1334.
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Abstract:
The thermal control unit(TCU) using phase change material(PCM) can well perform thermal control for portable electronic devices, and avoid it over heating. Two-dimensional mathematical model of TCU was presented, and numerical simulation was conducted to analyze its thermal performance. The results ...
Precession period extraction of high-rate rotating projectile
Li Yimin, Su Donglin, Leng Xuebing
2010, 36(11): 1335-1338.
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Abstract:
Precession is conical motion that projectile axes rotate around the projectile velocity direction in flight. Precession is one of micro-motions in addition to the translation. Precession produces frequency modulation on the returned radar signal and induces additional Doppler shifts to the Doppler f...
Finite element analysis of factors to thermal stress in thermal barrier coatings with orthogonal method
Li Zhiyong, Zhang Jianyu, Bao Rui, Fei Binjun
2010, 36(11): 1339-1342.
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The thermal stresses in room and elevated temperatures were studied in thermal barrier coatings (TBCs) which was coated at the outer surface of pipe specimens, using finite element method (FEM), and the Walker viscoplastic theory was adopted to depicting the stress-strain constitution in the ceramic...
Design of rotation modulation AHRS based on MEMS sensor
Xu Yefeng, Lü Yanhong, Qiu Haitao
2010, 36(11): 1343-1347.
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In order to achieve a high-precision, low-cost attitude and heading reference system (AHRS),the approach of using rotation modulation technology based on low-performance micro electronic mechanical system (MEMS) gyro was proposed. Quaternion and three sub-sample algorithms were used to calculate the...
Dynamic analysis for lunar lander based on rigid-flexible coupled model
Lu Yuntong, Song Shunguang, Wang Chunjie, Zeng Fuming
2010, 36(11): 1348-1352.
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Based on the rigid-flexible coupled multibody dynamics theory, an analysis method involved three-dimensional solid modelling, finite element analysis and multi-body system dynamics analysis was proposed. With such a method, the landing dynamics model for a lunar lander was established and used to an...
Vehicular DYC via SMC and system stability analysis
Zhang Wei, Ding Nenggen, Wang Jian, Yu Guizhen
2010, 36(11): 1353-1357.
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Direct yaw moment control (DYC) can generate the additional yaw-moment needed to maintain vehicle stability in the limit conditions so to improve the active safety of a vehicle-s handling. A nonlinear vehicle dynamic model which meets the requirements of vehicle stability control experiments was est...
Development of aircraft-design material-selection expert system
Lan Yuanpei, Jiao Qixiang, Guan Zhidong, Xu Guangxing
2010, 36(11): 1358-1364.
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Abstract:

Following a discussion on aircraft-design material-selection, a browser/service architecture framework of materials selection expert system, together with its implementation and prototype, was put forward. The system integrated rule-based reasoning, case-based reasoning and model-based method, and i...
Weight coefficients calculation for evidence sources and it-s application in evidences fusion
Meng Guanglei, Gong Guanghong
2010, 36(11): 1365-1368.
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Evidences fusion is an effective approach for improving target identification. In order to solve the unreasonable results generated by conflictive evidences, the assessment principle for weight coefficients of evidence sources was proposed. The evidence distance concept was introduced and a calculat...
Numerical simulation of flow and heat transfer in swirl microchannels
Xi Youmin, Yu Jianzu, Xie Yongqi, Gao Hongxia
2010, 36(11): 1369-1372.
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Swirl microchannel heat exchanger has the potential to transfer high density thermal flux. It will have great application prospect in solving thermal control problem of aviation and aerospace high power density component. On the basis of experimental research, a numerical simulation of flow and heat...
Dynamic and flutter analysis of long-straight-wing based on equivalent beam model
Zhang Xu, Wu Zhigang, Yang Chao
2010, 36(11): 1373-1377.
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For a complex structure of multiple degrees of freedom (DOF), building a simplified model of equivalent structure can lead to rapid and effective structural analysis. The method of energy equivalence was used to make a long-straight complex structure of multiple DOF equivalent to a beam element in s...
Compact array antenna in Ka band for near-field scattering measurements
Wang Hui, Miao Jungang, Jiang Jingshan
2010, 36(11): 1378-1381.
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A four-element compact array antenna was designed operating in Ka band for near-field scattering measurements, and an approximately uniform amplitude and phase distribution in the near fields of array antenna was achieved. The radiating element consists of pyramidal horn antenna and E-plane metal-le...
Adaptive feedback control design for hypersonic cruise flight vehicle
Li Huifeng, Li Zhaoying
2010, 36(11): 1382-1386.
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Because of strong nonlinear characteristics, modeling uncertainties and complicated flight environment, the control of hypersonic flight vehicle becomes a challenge. An approach which combines feedback linearization and adaptive control for a multiple-input-multiple-output(MIMO) nonlinear system wit...

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