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2012 Vol. 38, No. 12

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Fault diagnosis of direct-driven electromechanical actuator based on ensemble empirical mode decomposition
Liu Jun, Wang Zhanlin, Fu Yongling, Guo Yanqing
2012, 38(12): 1567-1571.
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Based on the ensemble empirical mode decomposition(EEMD), an fault diagnosis method was proposed to diagnose complex faults of the direct-driven dual-redundancy electromechanical actuator (DDDR-EMA). By adding different finite amplitude Gaussian white noises to the signal, EEMD keep the signal conti...
Ignition and flame holding ability of plasma torch igniter in a supersonic flow
Wei Baoxi, Ou Dong, Yan Minglei, Xu Xu
2012, 38(12): 1572-1576.
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In order to study the application of plasma torch igniter in the scramjet engine, a numerical and experimental study was conducted in a Mach 2 supersonic flow with the ethylene and hydrogen. A detailed analysis of ignition and flame holding characteristics was done at the fuel equivalence ratio from...
Dependability oriented avionics embedded software development framework
Niu Wensheng, Li Yahui, Wu Ji
2012, 38(12): 1577-1581.
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A systematic methodology was provided to facilitate the development of dependable embedded avionics software. The dependability primarily denotes to reliability, security and real-time. The dependability attribute model was defined to derive the key aspects to be specified in the stages of analysis ...
Fast autonomous guidance algorithm for spacecraft far range rendezvous phasing
Zhao Shuge, Chen Tong, Xu Shijie
2012, 38(12): 1582-1586.
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A fast autonomous guidance algorithm was designed based on classical orbital elements for spacecraft far range rendezvous phasing in near-circular orbit. For arbitrary initial argument of latitude difference,the phasing maneuver was divided into three stages—the initial orbit, the phasing orbit and ...
Routing algorithm of AFDX network based on trajectory approach
Liu Cheng, Li Hang, He Feng, Lu Guangshan
2012, 38(12): 1587-1590,1595.
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Static routing algorithm of virtual link (VL) is a key technique in avionics full duplex switched Ethernet (AFDX). A VLs’ static routing algorithm based on the trajectory approach was proposed for the real time demand of VLs. This algorithm gets each VL’s delay limit ratio first, and then configures...
Numerical simulation based on CE/SE method for airfoil flow with shock wave
Cui Shuxin, Gao Lin, Gao Ge
2012, 38(12): 1591-1595.
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A new numerical scheme was developed to avoid using double spatial grids to capture shock wave through the original space-time conservation element and solution element (CE/SE) method on the 2-D structured quadrilateral meshes. The design of the new scheme was based on the redefinition of conservati...
Multi-target data association algorithm based on tracking-differentiator
Li Yong, Huo Wei
2012, 38(12): 1596-1600.
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From the fact that position and velocity of a moving object can not vary discontinuously, a data association algorithm based on tracking-differentiator was presented for multi-target tracking in unknown clutters. The tracking-differentiator was applied to obtain positions and velocities correspondin...
Safe trajectory optimization with control failure effects estimation
Li Yinan, Yang Lingyu, Shen Gongzhang
2012, 38(12): 1601-1605.
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Control surface failures will change the aerodynamics of the aircraft and reduce its maneuverability as well as controllability. The traditional path planning methods based on the normal point-mass model have difficulty in generating an optimal and safe trajectory. To characterize the impaired motio...
Type synthesis for sensing mechanism of superconductor gravity gradient based on constraint pattern
Jia Ming, Yang Gongliu
2012, 38(12): 1606-1610.
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Based on constraint pattern, the type synthesis for sensing mechanism of superconductor gravity gradient was produced. The independent sensing mechanism of inline or cross component of gravity gradient was analyzed, and the freedoms of motion and constraint pattern of mechanism were deduced. The sim...
Novel decoupling-compensating control based on incremental model for bank-to-turn missiles
Zeng Xianfa, Wang Xiaohu, Zhang Jing
2012, 38(12): 1611-1615.
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The characteristic and existed problems of traditional dynamic inversion control for bank-to-turn (BTT) missiles were analyzed in detail. A novel decoupling-compensating control approach was proposed for BTT missiles. In this approach, an incremental BTT model which demonstrated the transition from ...
Optimization design about the rigid spline of the discrete teeth harmonic drives
Wang Su, Bai Xin, Chen Shixian
2012, 38(12): 1616-1618,1624.
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The transmission performance was analyzed , based on the device structure and transmission principle of the discrete teeth harmonic drive. The optimization design model for the rigid spline was established based on the relationship between the character of rigid spline and the transmission performan...
Main circuit topology and working status of inverter in on-site induction brazing of tubes
Zhang Wei, Miao Zhifei, Qi Bojin
2012, 38(12): 1619-1624.
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Considering the characteristic of on-site induction brazing of tubes, the voltage source series resonant circuit was adopted as main circuit topology of inverter in the square wave power. The impedance of series resonant circuit and the working status of inverter main circuit were discussed. Based o...
Performance analysis and comparison of flexure bearings with different profile lines
Chen Xi, Yuan Zhongyu, Qi Yingxia
2012, 38(12): 1625-1628.
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It is crucial to analyze the performances of flexure bearings which would influence the overall reliability of cryocoolers. The performance parameters of flexure bearings include the stress distribution, axial stiffness, and dynamic radial stiffness and so on. The Fermat flexure bearing was designed...
Fatigue crack monitoring of metallic structure based on eddy current array sensor
Ding Hua, He Yuting, Jiao Shengbo, Du Jinqiang
2012, 38(12): 1629-1633.
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To monitor the fatigue crack of aircraft metallic structure in real-time, a scheme for fatigue crack monitoring of aircraft metallic structure based on flexible planar eddy current array sensor is put forward. The characteristics of sensor were analyzed via semi-analytic model, and feasibility of sc...
Heat transfer in rotating trailing edge channels
Zhao Bin, Deng Hongwu, Qiu Lu, Ding Shuiting
2012, 38(12): 1634-1638.
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The heat transfer characteristics of static and rotating turbine blade trailing edge channels with staggered-ribs and pin-fins was experimentally. The model was a wedge shaped channel. Ribs were staggered on trailing and leading walls (p/e=7), pins of two different sizes were placed in the pin-fin r...
SVM fault diagnosis method based on NMF
Li Jianhong, Jiang Tongmin, He Yuzhu, Jiang Jueyi
2012, 38(12): 1639-1643.
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For overcoming the difficulty of fault feature extraction and solving the low efficiency of fault feature classification in a large dimensions fault diagnosis system,an algorithm of support vector machine(SVM)based on non-negative matrix factorization(NMF)fault diagnosis was researched. It is to avo...
Wall model for large-eddy simulation based on resonant triad waves
Zhang Nan, Ye Jian, Lu Lipeng
2012, 38(12): 1644-1648.
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Large-eddy simulations (LES)were developed to deal with engineering problems in recent decades. The cost of LES of wall-bounded flows depended strongly on the Reynolds number. Wall models to bypass the wall layer and contain adequate near-wall region kinetics were required to perform high-Reynolds-n...
River simulation based on Poisson disk distribution
Ran Jian, Ding Ying
2012, 38(12): 1649-1652.
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To solve computation overhead problems and to improve plausible visual effects, a novel real-time river-simulating method based on fluid dynamic formula was introduced. A Poisson disk distribution algorithm to achieve a well-structured distribution pattern in screen space was proposed. The algorithm...
Sequential compliance test method for lognormal distribution
Deng Qing, Yuan Hongjie
2012, 38(12): 1653-1656.
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Using the experience of sequential verification test program in exponential distribution for reference, the method of making the sequential verification test program in lognormal distribution was discussed, which takes the average life as an indicator. The test procedure of sequential test was provi...
Detector pose measurement and correction methods for FPD-based cone-beam XCT system
Gao Haidong, Yang Min, Wei Dongbo, Meng Fanyong
2012, 38(12): 1657-1660.
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To eliminate the artifacts in computed tomography (CT) images caused by the flat plane detector (FPD) pose error in cone-beam X-ray CT (XCT) testing system, methods of error measurement and correction were proposed. The ellipse fitting method based on the least squares technique was used to get the ...
Deadline assignment in real-time cooperative interception of distributed weapons
Sun Yadong, Xing Changfeng, Wu Ling, Lu Faxing
2012, 38(12): 1661-1665.
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In the cooperative interception of distributed weapons, a task is often divided into several subtasks. To ensure the tasks fulfilled in real-time, the overall deadline of a global task was translated into deadlines for subtasks using deadline assignment technique in distributed real-time systems. By...
Experimental study on improving AO-resistance of resin using sol-gel method
Yuan Jian, Zhao Xiaohu
2012, 38(12): 1666-1670.
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To improve the atomic oxygen (AO) resistance of the resin in low earth orbit, tetraethyl orthosilicate (TEOS) was added into the epoxy resin(EP) solution. The inorganic phases of SiO2 was in-situ generated using sol-gel method and the SiO2/EP hybrid materials were obtained. The ground-based simulati...
Dynamic control of a cable-driven humanoid-shoulder joint based on backstepping technique
You Xianqiang, Chen Weihai, Cui Xiang, Yu Shouqian
2012, 38(12): 1671-1675.
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Aiming at the problems that cable-driven parallel manipulator is difficult to create model and control, the dynamic model of the humanoid-shoulder joint was built by using Lagrange dynamics method so as to obtain the standard form of dynamic equation. Taking into account the redundant actuation and ...
New signal waveforms design for GNSS
Su Chengeng, Guo Shuren, Zhou Hongwei
2012, 38(12): 1676-1681.
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Continuous function waveforms will probably be adopted by future global navigation satellite system(GNSS) signals in bandwidth limitation situation due to their higher spectrum efficiency and better performance. In order to find new signal waveform solution for future GNSS, design criteria of naviga...
Novel closed magnetic circuit with permanent magnet biased for giant magnetostrictive actuator
Yang Yuanfei, Zhang Tianli, Jiang Chengbao
2012, 38(12): 1682-1685.
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The magnetic circuit of giant magnetostrictive actuator (GMA) was analysed and optimized with finite element software ANSYS. According to the design goals of high homogeneity of magnetic field and low magnetic flux leakage, a novel magnetic circuit biased by the combination of built-in permanent mag...
Emulator-based embedded software unit testing method
Xu Fu, Jin Maozhong, Liu Hui, Chen Qi
2012, 38(12): 1686-1690.
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A unit testing method for embedded software was presented, which used customized linker to parse object files and generates memory image. The memory image can be loaded into a software simulator to generate testing results. This method is especially useful for the unit testing of embedded software, ...

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