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2012 Vol. 38, No. 1

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Brushless DC motor double closed-loop control system based on variable coefficient PID
Guo Hong, Wu Haiyang, Wu Peijun
2012, 38(1): 1-5.
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A variable coefficient proportion integration differentiation(PID)algorithm used in the position loop was proposed and analyzed in the control system of electrical dual-redundancy brushless DC torque motor used in the direct drive valve. The steady-state error of the system was eliminated quickly by...
Method of modeling transient two-phase flow in injector
He Yongling, Ding Chuan
2012, 38(1): 6-10.
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A new method was applied in modeling and numerical simulation in transient two-phase flow inside a diesel injector for cavitation study. The simulation was started in steady flow when the needle valve was just about to be lifted and then contined to compute unsteady flow with self-made program. User...
Design and experiment of explosive cutting device of bail-out emergency exit
Feng Wenchun, Dang Xiaomin, Guan Huanwen, Song Wenjuan
2012, 38(1): 11-16,90.
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The technology of explosive cutting aircraft skin formed emergency exit was used in emergency evacuation of aircraft to save the time of evacuation. The feasibility of formed emergency exit through explosive cutting aircraft skin and fuselage frame in higher flight altitude was analyzed from the rap...
Analysis of aero-optical distortions based on canonical correlation analysis and proper orthogonal decomposition
Xu Dong, Liu Haowei, Duan Yue
2012, 38(1): 17-21.
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The methods of canonical correlation analysis (CCA) and proper orthogonal decomposition (POD) were used to study the 3D density field data computed by computational fluid dynamics (CFD). 2D-CCA was adopted to extract the canonical correction features between two cross sections along the spanwise, an...
Autonomous pulsars navigation method based on ASUKF for Mars probe
Ning Xiaolin, Ma Xin, Zhang Xueliang, Wu Jinyuan
2012, 38(1): 22-27.
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Autonomous navigation using pulsars is characterized by its steady, credible performance, high navigation accuracy, which is suitable for mars probe. Because errors in photons time of arrival reduce location accuracy, a kind of pulsars navigation method based on ASUKF (augmented state unscented Kalm...
Characteristic and detection of Mars dust
Sun Lilin, Qin Guotai, Zhu Guangwu
2012, 38(1): 28-32.
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Mars dust contributes to the Mars atmosphere dynamic and thermodynamic evolution process and the long-term modification of Mars albedo and surface geology.Mars dust environment is very crucial for the power system and optical sensors onboard Mars landers (or rovers).There is a need for Mars dust in ...
New north finding algorithm for strapdown compass based on FOG
Wang Yu, Cheng Xianghong, Wu Jun
2012, 38(1): 33-38.
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The ship rolling prevents a gyroscope from reliably measuring the angular velocity of the earth's rotation (Ω). Consequently,the strapdown compass system based on fiber optic gyroscopes (FOG) cannot compute the heading of the carrier based on the outputs of gyroscopes and the accelerometers. To addr...
Fuzzy comprehensive evaluation of corrosion damage of aircraft structures based on fault tree
Pan Bo, Jiang Tongmin
2012, 38(1): 39-42.
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To resolve the complexity and fuzziness of influence on the corrosion damage of aircraft structures, a method based on fault tree analysis and fuzzy theory was proposed to evaluate the corrosion damage of aircraft structures in complicated environments. Fault tree of corrosion damage on aircraft str...
Approach for degradation data analysis based on proportional failure rate model
Zhong Qianghui, Zhang Zhihua, Liang Shengjie
2012, 38(1): 43-47.
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Reliability evaluation using products' performance degradation data has become an important method which solves the problem of insufficient failure lifetime observations. On the basis of analyzing the close correlation between products' failure rate and failure critical values, the proportional fail...
Rotation distortion of local coordinate frame in curve skeleton-driven body deformation
Wang Cheng, Dai Shuling
2012, 38(1): 48-52.
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An analysis of defects resulting by using three basic orthogonal axes method to construct a local coordinate frame in body deformation was presented. A new approach which was a position-quaternion solution was proposed to improve the defects and rotation distortions of local coordinate frame in curv...
Integrated analysis of aerothermal-aeroelastic wings in hypersonic flow
Li Guoshu, Wan Zhiqiang, Yang Chao
2012, 38(1): 53-58.
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To research the static aeroelastic problems of the hypersonic vehicles in which the thermal effects must be considered, the rapid analysis of the hypersonic vehicles from aerodynamic heating to static aeroelasticity was developed. A hierarchical solution process was used to dealing with the aerother...
Mission reliability assessment for battle-plane based on flight profile
Liu Zhenyu, Ma Xiaobing, Hong Dongpao, Zhao Yu
2012, 38(1): 59-63.
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The mission reliability of battle-plane varied under different flight profiles. According to the characteristics of battle-plane's fault data, the flight profile conversion factor was introduced to establish the mission reliability model of battle-plane. Based on the model, the statistical inference...
Modeling and verification of de-icing software safety requirement based on expanded Petri net
Li Zhen, Liu Bin, Lu Minyan, Yin Yongfeng
2012, 38(1): 64-68,105.
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As a formal method, Petri net can ensure the correct construction of system but lacks the ability of modeling complicated system and automatic verification. Firstly, the formal semantics of Petri net was expanded, the place of state and numeric were distinctively defined, the transition state of fir...
LSP to improve vibration fatigue performance of deflation valve lever
Li Qipeng, Li Yinghong, He Weifeng, Liu Hailei
2012, 38(1): 69-74.
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In order to solve the fatigue failure of the valve lever fixed in certain aeroengine, the technology of laser shock processing (LSP) on the valve lever was studied. Then, the valve levers of prototype and valve levers processed by LSP, shot peening (SP) and enlarge R were applied to vibration fatigu...
Schedulability analysis for AFDX-based avionics systems
Zhou Tianran, Zhang Yongtao, He Feng, Xiong Huagang
2012, 38(1): 75-79.
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Avionics full duplex switched ethernet (AFDX) is designed for on-board communications in the new generation large aircraft. AFDX-based avionics systems are required to guarantee that hard real-time applications can be completed within their dead-lines. While current researches on real-time performan...
Dynamic characteristic of vibration isolation platform of control moment gyroscopes on satellites
Zhang Yao, Huang Tingxuan, Xu Shijie
2012, 38(1): 80-85.
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An isolation scheme for control moment gyroscopes (CMGs) was put forward and used on satellite which can provide an ultra quiet environment for the optical payloads, and dynamic characteristic of the vibration isolation platform for CMGs was analyzed in detail. The theories of the vibration isolator...
Virtual view synthesis based on triangular re-projection
Zhang Chunxiao, Zhao Yan
2012, 38(1): 86-90.
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Traditional view interpolation can only synthesize the novel view along the base line. The proposed method based on triangular re-projection can iteratively divide the scene into consistent and inconsistent triangles given a few of initial matches, and implement free-viewpoint view synthesis by re-p...
Time modeling and constraint verification of large-scale device collaboration system
Rong Xiaohui, Ma Shilong, Deng Pan, Chen Feng
2012, 38(1): 91-97.
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Aiming at the characteristics of complex time attributes and difficult time constraint verification in large-scale device collaboration system, a large-scale device collaboration model containing time attributes was presented. The time attribute was composed of device operation time and status durat...
Terrain following and autonomous landing using optical flow
Liu Xiaoming, Chen Wanchun, Xing Xiaolan, Yin Xingliang
2012, 38(1): 98-105.
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An optical flow sensor, which is fabricated by our laboratory, was mounted on a unmanned aerial vehicle(UAV) to implement terrain following and autonomous landing tasks by using optical flow as feedback. The performance of the optical flow sensor was tested and the UAV model was built. Control algor...
Resident region extraction using Gabor filter in aerial imagery
Gu Duoyu, Guo Jiang, Li Shuxiao, Chang Hongxing
2012, 38(1): 106-110,122.
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Automatic extraction of resident regions from medium and low revolution aerial images plays a crucial role in geographic information system(GIS) updating and unmanned aerial vehicle(UAV) navigation. The parameters of Gabor filter in detail were analyzed, and a fast resident region extraction algorit...
Robust eigenstructure assignment based on μ-analysis applied to flight control law design
Gao Bo, Yang Lingyu, Shen Gongzhang
2012, 38(1): 111-115.
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A new robust eigenstructure assignment algorithm was presented to improve the robustness of control law designed by eigenstructure assignment. This algorithm combined parametric eigenstructure assignment with μ-analysis, was based on linear fractional transformation, and then transformed robust eige...
Syndrome-based distributed joint source-channel coding scheme
Pan Xuzhou, Liu Rongke, Wang Yan
2012, 38(1): 116-122.
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A syndrome-based error resilient scheme of distributed joint source-channel coding was addressed. Without increasing the complexity of the encoder, a new appropriate syndrome based encoder with compression and error resilient capability were designed. Secondly, a corresponding decoder was designed a...
Maintenance-support model of materiel considering support equipment failure
Wang Yan, Ma Lin, Wen Jia, Kang Rui
2012, 38(1): 123-127.
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To analysis the impact of failure and logistics of support equipment bringing on the materiel support efficiency,the effect of support equipment failure resulting in maintenance tasks and the logistic process of support equipment in depots and between depots was described, a model of logistics proce...
Distributed adaptive cooperative guidance for multi-missile salvo attack
Zou Li, Kong Fane, Zhou Rui, Wu Jiang
2012, 38(1): 128-132.
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A distributed adaptive cooperative guidance law for multi-missiles with heterogeneous leader-follower was proposed to implement salvo cooperative attacks. On the basis of local communication and traditional proportional guidance law, a distributed cooperative guidance law for multiple heterogeneous ...
Stability analysis on scale factor of accelerometer based on fuzzy theory
Huang Xiaokai, Chen Yunxia, Zhang Shunong, Kang Rui
2012, 38(1): 133-137.
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Fuzzy theory was used to analyze the scale factor stability of accelerometer, since many affected factors of scale factor of accelerometer emerged some uncertainty nature, which can be describe by fuzzy theory. Specifically, triangular fuzzy numbers was used to derive the changing interval of magnet...
Principle and application of functional dimension driving in 3D tolerance analysis
Zheng Hongyong, Zheng Guolei, Zhao Huangjin
2012, 38(1): 138-142.
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As the differences between functional dimensions and modeling parameters of the product bring limitations on the application of parameter-driven technique in tolerance analysis, a method based on functional dimension-driven technique was presented. Traditional dimensions were defined by constraints ...

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