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2014 Vol. 40, No. 2

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Indirect method for trajectory optimization of hypersonic vehicle with static parameters
Zhang Hongwen, Zhang Kenan, Chen Wanchun
2014, 40(2): 141-147.
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Abstract:
An indirect method for optimal control problems with static parameters was developed. Trajectory optimization with static parameters for hypersonic vehicle was solved using this method. Static parameters were divided into three kinds, final time, boundary state variables and design variables. The fi...
Three-dimensional crack analysis and fatigue life prediction of aero heavy-load face gear
Wang Yanzhong, Tian Zhimin, Hou Liangwei, Lan Zhou
2014, 40(2): 148-153.
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Abstract:
Aiming at that life of face gear used in the aero heavy-load condition is difficult to predict, it's necessary to analyze the processes and lives of crack initiation and propagation. Using strain-life relationship and MSC.Fatigue, the simulation of crack initiation life was in progress to analyze th...
Numerical simulation of liquidity and uniformity of gasoline engine intake manifold
Ji Fenzhu, Gu Keshuai
2014, 40(2): 154-159.
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Abstract:
The liquidity and uniformity of intake manifold have a major impact on engine performance. A four-cylinder gasoline engine model was created by GT-power and the gas flow rate of intake manifold was simulated. Gas pressure and velocity distribution were showed in different inlet angles though STAR-CD...
Numerical simulation on the stealth characteristics of twin-vertical-tails for fighter
Yue Kuizhi, Sun Cong, Ji Jinzu
2014, 40(2): 160-165.
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Abstract:
In order to reduce the radar cross section (RCS) of fighter, the twin-vertical-tails effect on the RCS character of fighter was studied. The 3D digital fighter prototype was meshed. The RCS character effect of head, side and tail in three-surface fighter when twin-vertical-tails had a same deflectio...
Edges interference errordetection and reflector gaps correction for large-scale compact range
Zhou Guofeng, Li Xiaoxing, Luan Jingdong, Cheng Deji
2014, 40(2): 166-171.
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In order to avoid the physical interference and reflecting surface deformation caused by a single reflector edge error, and ensure the final surface accuracy and electrical performance of large-scale compact range, an unified orthogonal distance regression model taking account of the typical forms o...
Application of graphene on improving atomic oxygen resistance of material
Zhang Wen, Yi Min, Shen Zhigang, Zhang Xiaojing
2014, 40(2): 172-176.
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Abstract:
The application of graphene on spacecrafts was proposed. Graphene was prepared by the ultrasonic cavitation method, then it was added into epoxy resin and nanocomposites were prepared by the mixing method. Results of thermogravimetric analysis show that the thermal stability of the nanocomposite is ...
Robust H∞ control for hypersonic vehicles under asynchronous switching
Wu Zhendong, Wang Qing, Dong Chaoyang
2014, 40(2): 177-182.
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A new robust H∞ control design method was presented for hypersonic vehicles under asynchronous switching between the controllers and subsystems. A Lyapunov function dependent on switching signal of controllers was constructed, which could effectively counteract the intractable problem of controller ...
Wear status recognition of piston pump based on side frequency relative energy summation
He Zhaomin, Wang Shaoping
2014, 40(2): 183-187.
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Abstract:
Wear is a kind of progressive failure in piston pumps on aircrafts. As amount of wear is difficult to directly measure, vibration signal is often used to reflect it. However, characteristics of the vibration signal caused by wear are usually weak, and it is difficult to make an accurate recognition ...
Analysis of effect of interior pressure to deformation of inflatable wing with fluid-structure interaction analysis method
Yang Yongqiang, Ma Yunpeng, Wu Zhe
2014, 40(2): 188-192.
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Fluid-structure interaction (FSI)analysis of inflatable wing was carried out based on the ABAQUS-FLUENT FSI software. Distance-weighted average interpolation function was used to transfer aerodynamic pressure distribution between coupling interfaces. Deformation data was transferred using constant v...
Statistical analysis for crosstalk of twisted-wire pairs with non-uniform pitch
Bao Guihao, Su Donglin, Dai Fei, Gao Wanfeng
2014, 40(2): 193-197.
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Abstract:
The pitch error of random twisted wire pair (TWP) could directly impact the immunity levels of TWP. The randomness of pitch error would cause the uncertainty of crosstalk prediction of TWP. According to the analysis of the TWP production principle, the probability density of the pitch error of TWP w...
DMU-based project monitoring technology of aircraft development
Chen Changyu, Yu Yong, Zhao Gang
2014, 40(2): 198-203.
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Abstract:
Due to characteristics of the long cycle, complex data and concurrent events, aircraft development project demands efficient management environment. To satisfy this demand, a method of project monitoring technology based on digital mockup (DMU) was proposed, and then an integrated model of project m...
Numerical simulation of high-speed water-entry cavity of cone cylinder
Ma Qingpeng, Wei Yingjie, Wang Cong, Cao Wei
2014, 40(2): 204-209.
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Abstract:
Numerical simulation for modeling the cavity formation induced by the high-speed water-entry of a cylinder body with a cone head was performed. Volume of fluid (VOF) model and dynamic mesh were introduced for the multiphase flow and the movement of the body. The velocity attenuation and induced cavi...
Pressure oscillation analysis of aircraft hydraulic braking system considering pipeline
Huang Cheng, Jiao Zongxia, Shang Yaoxing
2014, 40(2): 210-215.
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Abstract:
Pressure servo-valve is usually used for aircraft hydraulic braking system, and the brake pipeline between the valve and the actuator is usually long. The long pipeline brings under damping frequency characteristic into the system, which will couple with the local close-loop pressure control structu...
General calculation study method of thermodynamic functions for substances
Liu Lie, Liang Guozhu
2014, 40(2): 216-221.
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The substance's thermodynamic functions (heat capacity, entropy, enthalpy) were commonly used in the rocket engine's thermal property analysis. According to the thermodynamic relation, the three functions above can be expressed as polynomial on temperature with the same seven factors. Due to the tec...
Reliability analysis of structures with fuzzy and non-probabilistic hybrid variables
Xu Menghui, Qiu Zhiping
2014, 40(2): 222-228.
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Abstract:
For the reliability analysis of structures in the case of coexistence of fuzzy and non-probabilistic uncertainties, the hybrid analysis model was transformed into non-probabilistic analysis models at different membership values distributed in the interval [0,1] continuously based on the decompositio...
Guidance and control optimization method for fighter with threat avoidance
Yu Lei, Fu Zhaowang, Li Zhanwu, Li Fei
2014, 40(2): 229-234.
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Abstract:
Guidance method with threat avoidance was researched based on optimal control theory. Guidance model was established based on situation parameter of air combat, and fighter guidance problem was constructed as an optimal control problem with nonlinear state restriction and path restriction. Weapon ef...
Application of BP-AdaBoost model in temperature compensation for fiber optic gyroscope bias
Liu Yuanyuan, Yang Gongliu, Li Siyi
2014, 40(2): 235-239.
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Abstract:
Aimed at the complex non-linearity in bias temperature error model of fiber optic gyroscope(FOG), based on back propagation (BP) neural network and adaptive boosting(AdaBoost) learning algorithm, a new BP-AdaBoost temperature compensation method was proposed to effectively enhance the FOG bias stabi...
Transformation control for the formation of multiple cruise missiles
Du Yang, Wu Sentang
2014, 40(2): 240-245.
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Abstract:
For the satisfaction and requirement of the cooperative engagement capability for multiple cruise missiles, a formation transformation control scheme was proposed to solve the intermediate collision within the whole flight formation system during the formation change. The limitation of missiles mane...
Optimal trajectory planning for small-scale unmanned helicopter obstacle avoidance
Meng Shaohua, Xiang Jinwu, Luo Zhangping, Ren Yiru
2014, 40(2): 246-251.
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Abstract:
Obstacle avoidance for unmanned helicopter safely flying in complex-low environments was investigated. A solving strategy based on nonlinear optimal control theory was developed. The computation of optimal obstacle avoiding maneuvers was viewed as an optimal control problem, where the solution minim...
Path planning of UAV in dynamic environment
Liu Yang, Zhang Weiguo, Li Guangwen, Shi Jingping
2014, 40(2): 252-256.
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Abstract:
In order to solve the problem of path planning in dynamic environment, a new method which introduced the time axis was given. Based on the configuration space (C space), the time axis was introduced to expand the C space to the configuration-time space (CT space), and the position of moving obstacle...
Carrier phase difference estimation method based on DDMR-assistance for GNSS-R altimetry
Wang Yiran, Hong Xuebao, Zhang Bo, Zhang Yanzhong
2014, 40(2): 257-261.
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A carrier phase difference estimation method based on the delay-Doppler map receiver (DDMR)-assistance for (GNSS-R) coastal altimetry was proposed. The system structure and the signal processing method were given. The proposed method, which can avoid the complicated search for the GNSS spreading cod...
Reliability analysis based on algebraic model for flight control computers
Zhang Jingkai, Zhang Weiguo, Liu Xiaoxiong, Wang Xiaoguang
2014, 40(2): 262-267.
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According to the architecture of modern airliners' flight control computers, a method dynamic fault tree analysis was used to assess the system reliability. Algebraic models with temporal operators which can handle dynamic logics were built for warm spare gates included in the system. Based on the e...
Cooperative active collision avoidance algorithm based on sliding mode control
Wang Pangwei, Yu Guizhen, Wang Yunpeng, Wang Di
2014, 40(2): 268-273.
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Abstract:
The traditional active collision avoidance algorithm of vehicles is mainly realized by applying brake of the following vehicle. But collisions can't be avoided if two vehicles are too close. Also, the emergency braking will cause sickness to drivers and passengers. To solve the problem, a new cooper...
Algorithm of trajectory prediction in free phase based on range adjusting
Liu Yonglan, He Zhenghong, Li Zhenxing, Yang Haoyun
2014, 40(2): 274-279.
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Abstract:
Radar has the characteristic that range accuracy is higher than angle accuracy. With taking full use of the asymmetrical measurement, a method of trajectory prediction in free phase based on the range adjusting was put forward. On the basis of ballistic missile movement data in free phase measured b...
Design and analysis of flexible fixture for aircraft side panels
Ma Zhengwei, Li Weidong, Wan Min, Gao Hong
2014, 40(2): 280-284.
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Abstract:
Based on the analysis of two kinds of aircraft side panels and requirements in digital assembly, a novel type of flexible fixture suitable for aircraft side panels assembly was proposed. The fixture based on four accurate 3-coordinate manipulators can be equivalent to a 6-DOF parallel mechanism. Man...

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