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2007 Vol. 33, No. 09

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Investigation of force under asymmetry stator wake
Meng Yue, Li Lin, Li Qihan
2007, 33(09): 1005-1008.
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To reduce the forcing response of rotor blades due to the wake of front stator vane, a study of front stator aerodynamic mistuned was proposed. The main aims of this article lie on following two aspects. First one explored how to simulate three-dimension rotor-stator unsteady flow field for asymmetr...
Hot-firing tests and numerical simulation of aerospike nozzles
Wang Changhui, Liu Yu, Liao Yunfei
2007, 33(09): 1009-1012.
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Hot-firing tests and numerical simulation were carried out on a 3-cell GH2/GO2 linear aerospike nozzle engine with round-to-rectangle primary nozzles. Test apparatus, structures and design parameters of the main parts concerned with the experimental engine were described. Data measured in the tests,...
Rotordynamic analysis of whole aero-engine models based on finite element method
Chen Meng, Ma Yanhong, Liu Shuguo, Hong Jie
2007, 33(09): 1013-1016.
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In modern times, the mechanical and aero forced frequency on aero-engines become more and more intricate, so dynamical interaction of different structures should be taken into account in aero-engine vibration analysis. For above reasons, a rotordynamic analysis of a whole engine model based on three...
Development and experiment of active member for space-base precise pointing Hexapod
Li Weipeng, Huang Hai, Bian Bian
2007, 33(09): 1017-1020.
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A platform scheme that provides precision pointing and active vibration isolation for space-base payloads based on parallel mechanism-Hexapod was proposed. With the analysis of the current Hexapod-s actuators, a high precision dual-driving hybrid actuator was developed. It integrated ball-screw actu...
Experiment of solid-liquid phase change in copper foam
Zhang Tao, Yu Jianzu
2007, 33(09): 1021-1024.
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The thermal performance of solid-liquid phase change thermal storage device which embedded with copper foam was investigated. The 98％ pure Heneicosane (C21H44) was used as the phase change material (PCM), and it was filled in the copper foam through a vacuuming procedure. The PCM and the copper foam...
Risk probability assessment method for complex system
Ge Zhihao, Xu Haojun, Liu Lin, Meng Jie
2007, 33(09): 1025-1028.
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To assess the complex system-s risk probability while the number of the simples was limited, the small probability assessment modeling method by small simples was put forward, and the mapped relationship between the cumulating probability and the extremum of the critical parameter was approached by ...
Numerical simulation of parachute fluid-solid coupling problem and flow analysis
Wang Kan, Cao Yihua, Yu Ziwen, Pan Xing
2007, 33(09): 1029-1032.
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A new numerical simulation method for predicting parachute fluid-solid coupling problem using semi-implicit method for pressure-linked equations (SIMPLE) algorithm is proposed. The both coupling computation and flow field analysis during terminal descent stage are proved efficient through sample ana...
Effectiveness evaluation for air-combat of airborne fire control system
Guo Jinyuan, Huang Jun, Yan Bingxin
2007, 33(09): 1033-1035.
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The effectiveness evaluation of airborne fire system is a vital part of airplane-s effectiveness evaluation on combat. A modeling method that combined the theories of influence diagrams and Lanchester equation was applied to build the air-combat model of airborne fire control systems. The damaging r...
Attack helicopter gun recoil compensation control system design
Yu Zhi, Shen Gongzhang
2007, 33(09): 1036-1040.
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The recoil force from attack helicopter gunfire would cause the change of kinetic parameter of the carrying aircraft, and further affect the firing accuracy of weapon. Actually it is of a phenomenon on disturbance response. In order to reduce this recoil effects, a gun recoil compensation control fr...
Method of signal processing in weigh-in-motion of vehicles
Wu Jie, Fei Yuhua, Yu Jinsong, Wan Jiuqing
2007, 33(09): 1041-1045.
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Based on the concept of inverse model, an adaptive inverse filter (AIF) was employed which could suppress noise within the bandwidth of the desired signal. Within the framework of the finite impulse response (FIR) filter, the inverse system of weigh-in-motion (WIM) system was constructed by using le...
Dead band nonlinearity of digital closed-loop FOG
Jin Jing, Zhang Chunxi, Song Ningfang, Li Lijing
2007, 33(09): 1046-1050.
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Dead band nonlinearity is one of nonlinearity errors in digital closed-loop fiber optic gyroscope (FOG). Output noise and drift of FOG can be reduced by attenuating dead band nonlinearity. Based on the definition of the resolution and threshold for FOG, a dead band definition and test method in digi...
Adaptive fuzzy sliding mode control for reaction-jet and aerodynamics compound control missile
Wu Zhenhui, Dong Chaoyang
2007, 33(09): 1051-1055.
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A missile autopilot design method based on adaptive fuzzy sliding mode control (AFSMC) was proposed for reaction-jet and aerodynamics compound control missile with nonlinearity and strong coupling. The universal approximation ability of adaptive fuzzy system was used to approximate the nonlinear fun...
Recognition method for tactical maneuver of target in autonomous close-in air combat
Zhong Youwu, Liu Jiarun, Shen Gongzhang
2007, 33(09): 1056-1059.
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A two-stage recognition system was proposed for recognizing tactical maneuvers of target in autonomous close-in air combat, which included basic maneuver recognition and combinatorial maneuver recognition. Basic maneuvers were identified in first stage by fuzzy inference method. The chatter of outpu...
Study on distributed active control of fluid pulsation in hydraulic piping
Ouyang Pingchao, Jiao Zongxia, Liu Hongmei
2007, 33(09): 1060-1063.
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Periodic fluid pulsation in aeroplane hydraulic piping could induce fluid-construction vibration and lead to fatigue damage. It is impossible to find the error sensor′s optimization location because of the pressure standing wave, and the pulsation attenuation effect is not perfect when adopting puls...
Error analysis and integrated compensation of scale factor for MEMS gyroscope
Li Jianli, Fang Jiancheng, Sheng Wei
2007, 33(09): 1064-1067.
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In dynamic condition, scale factor error is one of the main errors for MEMS(micro electromechanical system)gyroscopes. For the sake of improving performance of the MEMS gyroscope, the physical origin of bias, nonlinear and asymmetry error of scale factor were analyzed. Based on the operational princ...
Algorithms of tasks scheduling in parallel test based on graph coloring theory
Li Xin, Shen Shituan, Lu Hui
2007, 33(09): 1068-1071.
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The test method of most automatic test systems is serial at present, so test efficiency is very low. For this problem, a relation model of test tasks was established based on graph theory. The relation between test tasks and instruments was described by "graph", so the project problem of test tasks ...
Survivability of SCI network topologys
Liu Xingchun, Shao Bo, Li Zheng
2007, 33(09): 1072-1076.
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For the need of the avionics, the survivability of SCI (scalable coherent interface) networks′ structures which may suitable for the avionics was studied. Some distributed switch topologies were selected, such as torodial mesh and wrapped butterfly structures, which are made by the double-node or th...
Development of optoelectronic planar position system used to measuring position and attitude of the large construction
Wang Guodong, Li Yunhua, Li Chao
2007, 33(09): 1077-1081.
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The characteristics of now used push-bridge construction system were analyzed, and the main disadvantages of the construction system were pointed out. Aimed at those problems, a new planar position system was developed, which was composed of laser beam, photoelectric target and MCU based data acquis...
Multisensor dynamic bias estimation with earth-centered earth-fixed coordinate system
Li Da, Li Shaohong
2007, 33(09): 1082-1085.
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Registration is the necessary process of data fusion of multisensors system. A new registration algorithm was presented to estimate sensor biases with earth-centered earth-fixed (ECEF) coordinate system. This algorithm was used to correct dynamic systematic errors, and improved estimation performanc...
Model-driven intelligent form system frame oriented to fields
Tang Wenzhong, Mo Weidong
2007, 33(09): 1086-1089.
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Form is the information carrier in the information system. In order to improve the information system-s development efficiency, reuse the existed systems, provide a prototype system and make the business crew involved in the development of system much better, a novel development method of business m...
Robust proximal support vector machine
Liu Yun, Tang Fagen, Lin Guangyan
2007, 33(09): 1090-1093.
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Since proximal support vector machine(PSVM) is susceptible to uneven class sizes and is sensitive to outliers and noises in the training set, a robust PSVM was proposed. By imposing fuzzy memberships to each data point and introducing different error penalties for different classes, the robustness o...
Auto-construction algorithm of four-dimensional(4D) geological stratum on complex geological structure
Zhang Junan, Liu Ruigang, Yang Qin, Jin Maozhong
2007, 33(09): 1094-1098.
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Geological modeling is widely used in the fields of oil exploration and mineral resource exploitation. With the analysis of current constructing method of stratum, the 4D geological modeling method based on morphing algorithm was addressed. The faults spatial relation binary tree and spatial morphin...
Schedule planning method based on process modeling
Gao Juntao, Zhang Li
2007, 33(09): 1099-1102.
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To make the complexity of the schedule planning for large project lower, a new method was proposed to make project schedule plan based on process modeling. After analyzing the interrelationships between process model and project schedule plan, the concept mapping rules between them were presented to...
Policy and traffic classification based MPLS explicit routing algorithm
Huang He, Li Peng, Li Weiqin
2007, 33(09): 1103-1106.
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An explicit routing algorithm based on policy and traffic classification was proposed. The algorithm was implemented in two steps: offline and online computation. The process of offline computation outputted the bandwidth for each type of traffic flow and the algorithm was based on multi-commodity p...
File migration strategy based on energy model in heterogeneous storage system
Huang Heqing, Song Xiaohua, Cao Yu
2007, 33(09): 1107-1111.
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File migration strategy in heterogeneous storage system is needed with low migration cost, high efficiency and strong adaptability. Study current file migration strategy, a new file migration strategy based on energy model was presented. The energy model was developed to describe the data access loa...
Precisely license plate locating algorithm based on edge and color information
Zeng Lihua, Li Chao, Xiong Zhang
2007, 33(09): 1112-1116.
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A precise license plate locating algorithm was proposed combined with the mathematical morphology to solve the problems of existing locating algorithms such as low locating rate and slow speed. The algorithm was based on edge detection and color information. First color-image was preprocessed with g...
Simulation and experiment of cylinder shell structure dropping into water based on fluid structure interaction
Li Fei, Sun Lingyu, Zhang Guangyue, Kang Ning
2007, 33(09): 1117-1120.
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When dropping into water from the air, large cylinder shell structures may suffer larger deformation or collapse due to the strong water impact. To improve the structural crashworthiness, the simulation was done, combined with corresponding experiments. Through the static tensile and dynamic SHPB te...
Bezdek type fuzzy attribute C-means clustering algorithm
Liu Jingwei, Xu Meizhi
2007, 33(09): 1121-1126.
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Bezdek type fuzzy attribute C-means clustering algorithm(FAMC) was proposed by extending attribute means clustering(AMC) algorithm based on fuzziness index (or weighting exponent) m. The iterative algorithm was derived and the effect of fuzziness index m on objective function convergence was discuss...
Parallel solution of upper and lower bounds on eigenvalues for uncertain structures
Zhang Xu, Qiu Zhiping, Hu Juxi
2007, 33(09): 1127-1130.
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When the structure parameter contains uncertain information and uncertain features in the practice engineering, the inherent frequency of the structure is also uncertain. Then the generalized solution method of the interval eigenvalue problem that for the uncertain dynamic structure need to be consi...

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