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2014 Vol. 40, No. 1

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Elastic properties computation for three-dimensional and four-directional braided composites based on an improved model
Liu Zhenguo, Shang Yuanchun, Dong Apeng, Lü Mingyun
2014, 40(1): 1-5.
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Abstract:
In order to study the three-dimensional and four-directional braided composites on the basis of an improved unit cell model with rectangular cross-section, the relationship between the geometric properties of the cells and the braiding parameters were deduced with considering the effects of adhesive...
Singularity of 3UPS-S parallel mechanism in single limb motion
Han Xianguo, Liu Yanlong
2014, 40(1): 6-9.
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If only one limb of the parallel mechanism was driven, this limb can't move in full stroke because of the constraints from other limbs. In order to analyze the essential cause of single limb motion limit in parallel mechanism, the method of screw reciprocal product was adopted to calculate the axial...
Activity-aware & energy balance based routing protocol for wireless sensor networks
Wang Chengliang, Wang Qiang
2014, 40(1): 10-17.
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The node triggering and data transmission in wireless sensor network(WSN) shows an activity pattern. A clustering algorithm activity-aware clustering protocol(AACP) was put forward based on this activity pattern. Sensor nodes were divided into a plurality of clusters by AACP, and then activities wer...
Heating generation model and heat dissipation performance of the power battery in electric vehicle
Ji Fenzhu, Liu Lijun, Yang Shichun, Xu Bin
2014, 40(1): 18-24.
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The thermal coupling models were established on the positive plate collector, the negative plate collector and the battery plate, which based on the Bernardi heat generation rate model of a single battery. The heat transfer model of battery group was founded as well. In the natural ventilation envir...
Neural network adaptive control algorithm for permanent magnet spherical motor
Liu Jingmeng, Liu Yan, Chen Weihai, Zhang Liang
2014, 40(1): 25-30.
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A control method for a 3-DOF spherical motor was introduced. The 3-DOF spherical motor had three-dimensional orientation measurement ability. Considering the mechanical structure of the spherical motor, XYZ Euler angle was used for the construction of the kinematics model. The dynamic model was esta...
Corrosion behavior of steel Q235 co-influenced by Thiobacillus thiooxidans and Bacillus
Du Juan, Li Songmei, Liu Jianhua, Yu Mei
2014, 40(1): 31-38.
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Surface analysis methods, a mass loss method, and electrochemical tests were employed to investigate the corrosion behavior of steel Q235 under the synergistic effect of Thiobacillus thiooxidans(T.t) and Bacillus. Scanning electronic microscopy (SEM) results reveal that a densest biofilm was formed ...
Effect of structural material upon the dynamic performance of FOG
Liu Haixia, Jiang Yaofei, Song Ningfang, Pan Xiong
2014, 40(1): 39-43.
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In a dynamic process, the fiber-optic gyroscope (FOG) generates a nonreciprocal error easily. After analyzing the reason of the FOG generating dynamic error, the principle that structural material performance has a significant influence on the FOG dynamic performance was proposed. Applied different ...
Modelling, simulation and control of integrated digital hydraulic actuation system
Qi Haitao, Fu Yongling, Qi Xiaoye
2014, 40(1): 44-47.
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With the developing of integrated technology of mechanical, electrical, hydraulic and control and the developing of digital hydraulic technology, a new integrated digital hydraulic actuation system (IDA) was put forward based on digital cylinder and edropump(electric-hydraulic-pump). The system comp...
Rapid modeling of trailing edge slots in bowed-twisted turbine blade
Zhang Baoyuan, Xi Ping, Yang Jiong
2014, 40(1): 48-53.
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Trailing edge slots are important cooling structures in turbine blade. In order to realize the precise modeling of these structures in bowed-twisted turbine blade and improve the modeling efficiency, a rapid generative modeling method was proposed, including the tool body creation step and the slot ...
Influences of aerodynamic configuration parameters on helicopter flying qualities
L&, Shaojie, Cao Yihua, Li Guozhi
2014, 40(1): 54-58.
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The UH-60A helicopter nonlinear flight dynamic model suited to evaluate the flying qualities was built. Trim calculation of the model was conducted, stability and controllability derivatives were calculated, and the agreement between the computational results and the referenced data indicated that t...
RFI suppression processing for compressive sensing based SAR imaging
Mai Chaoyun, Sun Jinping, Cui Ruxin, Zhang Bingchen
2014, 40(1): 59-62.
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Abstract:
To the synthetic aperture radar (SAR) imaging system which uses compressive sensing (CS) technology, radio frequency interference (RFI) would undermine the priori sparse condition and cause deterioration of image quality, making the subsequent reconstruction algorithm complete the imaging process in...
Design-in of reliability through axiomatic design
Yang Dezhen, Ren Yi, Wang Zili, Xiao Jing
2014, 40(1): 63-68.
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To completely meet the requirements of reliability design in the product designing, an axiom-based designing-in reliability approach was proposed. In light of the axiomatic design principles, products were designed preliminarily to establish their functional requirements, so that according to these ...
Optimal allocation of air ammunition support crew based on PERT networks
Guo Xiaowei, Ma Dengwu, Deng Li
2014, 40(1): 69-74.
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To solve the problem of high requirements for efficiency and reliability of air ammunition support, on the basis of analyzing impact of each activity on completing assignment in program evaluation and review technique(PERT) networks of support process, activity criticality index, crucial index and c...
Gain schedule control of morphing vehicle based on switched polytopic system
Wang Tong, Wang Qing, Jiang Weilai, Dong Chaoyang
2014, 40(1): 75-79.
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Considering morphing vehicles with alterable sweep wings, control design and synthesis within full flight envelope was researched. The morphing vehicle model based on switched polytopic systems was established. In this framework, the stability analysis was accomplished by Lyapunov functions. The pre...
Disturbance rejection sliding mode control of hypersonic vehicle based on backstepping method
Hou Delong, Wang Qing, Wang Tong, Dong Chaoyang
2014, 40(1): 80-85.
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Abstract:
A kind of disturbance rejection sliding mode control based on backstepping method was studied for trajectory tracking control problem of hypersonic flight vehicle in the presence of uncertain parameters and external disturbances. The nonlinear hypersonic vehicle dynamics model was translated into th...
Measurement and evaluation of mental workload for aircraft cockpit display interface
Wei Zongmin, Wanyan Xiaoru, Zhuang Damin
2014, 40(1): 86-91.
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Mental workload is one of the most important factors that affect flight safety. Objective measurement for pilot mental workload is of great significance for the ergonomics evaluation and optimal design of mental tasks in aircraft cockpit display interface. On the basis of event related potential (ER...
Dynamic modeling and characteristics analysis of hose-paradrogue aerial refueling system
Wang Haitao, Dong Xinmin, Dou Hefeng, Xue Jianping
2014, 40(1): 92-98.
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The dynamic model of hose-drogue aerial refueling system is unduly predigested in the research of autonomous aerial refueling, while high cost, computational complexity and inextensible limitation of hose are not solved by the available modeling methods. In order to overcome above problems, a dynami...
Design of high overpressure cockpit based on composite material
Gao Haipeng, Liu Meng, Wang Jun
2014, 40(1): 99-103.
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In the face of the phenomenon of low overpressure of military airplane cockpits in our country, the design thought of high overpressure cockpits was proposed to realize high work efficiency and comfortable cockpit environment. To solve the contradiction between cockpit weight and environmental effic...
Mechanical accuracy measuring and electrical performance validation for high-precision compact antenna test range
Luan Jingdong, Li Xiaoxing, Zhou Guofeng, Wang Kuikui
2014, 40(1): 104-109.
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Based on the deterministic basis of the surface accuracy for the antenna, computational modeling with the semi-optical path difference as minimum value was established. As a result, a software program for surface measurement and adjustment of reflector antenna was developed. The surface accuracy of ...
Improvement of HLA/RTI real-time performance by scheduling periodic and aperiodic tasks
Liu Shutian, Dai Shuling, Zhang Yalin
2014, 40(1): 110-114.
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In order to apply high level architecture (HLA) in some real time systems, real-time performance of run-time infrastructure (RTI) must be guaranteed. Because of precedence constraints of correlated tasks between federates, it is hard to provide predictable response for all tasks, and it is also diff...
Sneak circuit partition analysis method based on graph theory
Liang Yin, Ma Qishuang, Xu Ping
2014, 40(1): 115-119.
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Sneak circuit analysis is an important reliability analysis step in circuit design. With the scale enlargement of the circuit system, analyzing the circuit integrally increased the analysis time as well as the space occupied by the analysis process. While using sneak circuit analysis in complex circ...
Distributed cooperative guidance and control for multiple missiles
Sun Xuejiao, Zhou Rui, Wu Jiang, Chen Shaodong
2014, 40(1): 120-124.
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A kind of multi-missile distributed cooperative guidance and control method for coordinated attacking maneuvering target in three-dimensional space was proposed based on the principle of network synchronization. A kind of suitable three-dimensional position synchronization algorithm was designed. Th...
Improved SMO algorithm of nonlinear regression support vector machine
Zhao Changchun, Jiang Xiaoai, Jin Yinghan
2014, 40(1): 125-130.
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In order to solve the regression problems of nonlinear data and nonlinear function, the support vector machine (SVM) sequential minimal optimization (SMO) algorithm was adopted. The original SMO algorithm has deficiencies such as low training speed and instability training results. To accelerate the...
Multistage decoding algorithm of block coding modulation
Ren Jie, Miao Jungang, Zhang Huisheng, Chen Zhengkang
2014, 40(1): 131-134.
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Considering relatively higher requests of complexity of decoding algorithms due to the demand of higher decoding speed in some telecommunication systems, a multistage decoding algorithm was given based on the multilevel structure of block coding modulation (BCM). Each stage of the algorithm refers t...
Experiment on work hardening of milling TB6
Zhou Zitong, Chen Zhitong, Jiang Like, Li Xiuqin
2014, 40(1): 135-140.
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How the tool wear and milling parameters influence the work hardening in the process of face milling TB6 was studied to figure out the principles of work hardening. The results show that among the parameters selected in the experiments, the work hardening degree ranges from 107% to 112% and the dept...

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