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2011 Vol. 37, No. 10

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Numerical investigation of impingement and heat transfer on inner surface of airfoil former cavity with film holes
Wu Hong, Liu Yusheng, Xu Guoqiang
2011, 37(10): 1191-1195. doi: CNKI:11-2625/V.20111013.1738.017
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Abstract:
Numerical simulations of impingement and heat transfer in a static airfoil former cavity with film holes were performed on conditions at different Reynolds numbers. Flows of the vortex by impingement on heat transfer mechanism was analyzed on the inner surface of leading-edge. The numerical result s...
Multiple channels extended chirp scaling algorithm for spaceborne multi-channels data processing in ScanSAR mode
Yang Wei, Li Chunsheng, Chen Jie, Wang Pengbo
2011, 37(10): 1196-1201. doi: CNKI:11-2625/V.20111013.1436.005
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Aimed at the realization of ultra-wide-swath, the operation of spaceborne multi-channels synthetic aperture radar(SAR) systems in ScanSAR mode was studied. Based on the characteristic analysis of the mode, a new method of ultra-wide-swath was presented as well as the imaging algorithm (MCECS, multip...
Real-time performance evaluation in fibre channel networks
Zhao Changxiao, Tu Xiaojie, Ding Fan, Xiong Huagang
2011, 37(10): 1202-1206. doi: CNKI:11-2625/V.20111013.1517.013
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To solve real-time performance evaluation problem in fibre channel (FC) network, a network model of the FC networks was built, and then two different switch strategies were proposed to satisfy different needs of avionic networks. A method of end-to-end maximum delay calculation was provided, based o...
Flight operations risk diagnosis method on quick-access-record exceedance
Qi Mingliang, Shao Xueyan, Chi Hong
2011, 37(10): 1207-1210. doi: CNKI:11-2625/V.20111020.1126.010
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Based on the data of quick access record(QAR), a mathematical model was formulated to find the high risk subspace-, which has high probability for a special QAR exceedance in landing stage, in the space- consisted of the flight operation indexes, such as decline rate, aircraft pitch, etc. Focusing o...
Dynamic response analysis of airdrop for flexible aircrafts
Wu Zhigang, Yang Chao, Jing Zhiwei, Yang Qiuyan
2011, 37(10): 1211-1217. doi: CNKI:11-2625/V.20111014.0830.002
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Abstract:
Airdrop of heavy cargos can produce severe dynamic loads. Excitation of the loads have wide band of frequency, which can excite many higher order elastic modes. And the dynamic response may be amplified by the aeroelastic effects. A method of dynamic response analysis of heavy cargo airdrop for flex...
Mechanical behaviors of brush seals and sealing performance
Wang Zhili, Guo Miaomiao, Li Like
2011, 37(10): 1218-1222. doi: CNKI:11-2625/V.20111013.1436.007
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The brush seal design and analysis software named Field CAL which was built independently. The mechanical behaviors of bristles are the main reasons of bristles ‘low down’ and hysteresis effect. The pressure field and flow field of brush seal were stimulated and the bristle mechanical behaviors were...
Results analysis and prediction on civil aviation safety indices
Wang Yanyang, Cao Yihua
2011, 37(10): 1223-1227. doi: CNKI:11-2625/V.20111013.1727.015
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In order to predict civil aviation safety, the range prediction model was developed by using grey range prediction method, which suited for the character of less and uncertain of the safety assessment result data. The results of civil aviation safety indices were shown. According to these results, t...
Route planning of cruise missile based on improved particle swarm algorithm
Sun Jian, Wu Sentang
2011, 37(10): 1228-1232. doi: CNKI:11-2625/V.20111013.1436.008
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Particle swarm optimization algorithm(PSO) is new type swarm intelligence algorithm after genetic algorithm and ant colony optimization algorithm,which is usually used in solving complex problems. Because its iterative formula is continuous, PSO is more suitable to solve route planning without grid....
Quality of service guarantee for avionics high-speed switched network
Wang Haotian, Zhou Li, Liu Cheng, Xiong Huagang
2011, 37(10): 1233-1237. doi: CNKI:11-2625/V.20111020.1126.008
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To achieve avionics network-s real-time and high bandwidth performance, the fibre channel(FC) over wavelength division multiplexing(WDM) architecture was established, which adopt the periodical flows for real-time communication in switches, and the scheduling algorithm based on load-matching output ...
Analysis method for influential factors of aviation equipment availability based prognostics and health management
Liu Rui, Ma Lin, Kang Rui, Zou Yingzhi
2011, 37(10): 1238-1244. doi: CNKI:11-2625/V.20111020.1126.003
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Abstract:
The aviation equipment availability analysis method was reviewed and the influential factors of aviation equipment availability were classified as three categories.The newly increased influential factors of aviation equipment availability were analyzed through analyzing in the influence of prognosti...
Inter-satellite links topology scenario based on minimum PDOP criterion
Sun Hua, Hao Xiaopeng, Feng Wenquan, Yin Jia
2011, 37(10): 1245-1249. doi: CNKI:11-2625/V.20111013.1436.006
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Inter-satellite link is a critical technology for the satellite navigation system to realize its independent running. On the base of Walker(24/3/2) constellation, the visibilities between satellites and relative constraints of inter-satellite links were analyzed. After computing and determining the ...
Improved approach for digital multiple notch filter design
Wang Qiusheng, Yuan Haiwen
2011, 37(10): 1250-1255. doi: CNKI:11-2625/V.20111013.1436.009
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A digital multiple notch filter was mainly used to remove sinusoidal interferences contained in a digital signal. To remove the shortcomings in the classic methods, an improved design approach about the filter was presented. It made use of the mapping relationship between the amplitude response of a...
Critical region protection testing method for operating system shared date
Zhang Mingjie, Lei Xun, Song Heng, Li Qiang
2011, 37(10): 1256-1259. doi: CNKI:11-2625/V.20111020.1126.002
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Abstract:
The method for testing critical region protection was studied. A method called SVAM (shared variable address monitor) for testing critical region protection mechanism of shared variable, which is based on monitoring shared date address, was presented. The proposed testing method consists of a real-t...
System synthesis design method in system engineering process
He Fei, Yang Jianjun
2011, 37(10): 1260-1263,1270. doi: CNKI:11-2625/V.20111020.1126.005
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Abstract:
Based on the design process acted as a solution-finding process under certain constraints, and on analysis of the system engineering process, for a complex product, a system synthetic design method with ‘request-function-structure’ solution space and ‘analysis-synthesis-evaluation’ execution mechani...
CAN bus application layer protocol design for unmanned helicopter system
Zhang Lei, Zhu Ming, Wu Zhe
2011, 37(10): 1264-1270. doi: CNKI:11-2625/V.20111013.1436.012
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Abstract:
In order to put the CAN (Controller Area Network) into UHS (Unmanned Helicopter System) application, a universal CAN application layer protocol was developed. The problems which are data definition, telemetry, telecontrol data link bandwidth and so on in the CANaerospace V1.7 protocol application in...
On-orbit calibration of stellar camera considering distribution of star image points
Xie Junfeng, Jiang Wanshou, Gong Jianya
2011, 37(10): 1271-1276. doi: CNKI:11-2625/V.20111020.1127.013
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Although the parameters of the stellar camera are accurate by the ground calibration in advance, they will change due to the intense vibration in the process of the satellite launch or the change of space environmental factors such as the temperature, the atmospheric pressure, etc. The on-orbit cali...
Planning of CSADT with stress optimization under cost constrained
Ge Zhengzheng, Li Xiaoyang, Jiang Tongmin
2011, 37(10): 1277-1281. doi: CNKI:11-2625/V.20111020.1127.012
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Abstract:
In constant stress accelerated degradation testing (CSADT)scheme, there are four variables: stress levels, interval of performance inspection, sample size and number of inspection at each stress level need to be determined. However, the issue about how to optimize stress levels is seldom discussed. ...
Optimal safety partition design for integrated core processor under dynamical priority
He Feng, Gu Jian, Xiong Huagang
2011, 37(10): 1282-1287. doi: CNKI:11-2625/V.20111020.1127.011
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Abstract:
During the research on the application of partition management model into avionic integrated core processor (ICP), the reasonable partition parameters design is an important factor to ensure the mission-critical and safety-critical guarantee for the whole system. Based on the standard model, the ext...
Power line communication for control system of reconfigurable machine tools
Yang Dongsheng, Huan Ji, Stefan Schmitz, Karl-Heinz Wurst
2011, 37(10): 1288-1292,1297. doi: CNKI:11-2625/V.20111020.1126.007
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Abstract:
The communication system requirements for reconfigurable machine tools were analyzed. A new communication system based on PLC (power line communication) was proposed. The carrier frequency and bandwidth of the communication system were settled according to the channel characteristics and noise spect...
Sun sensor calibration based on exact modeling with intrinsic and extrinsic parameters
Fan Qiaoyun, Zhang Guangjun, Wei Xinguo
2011, 37(10): 1293-1297. doi: CNKI:11-2625/V.20111013.1435.003
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Abstract:
Polynomial equation fitting and simply modeling with only intrinsic parameters were generally used methods to calibrate a sun sensor, in which its accuracy was limited to 0.02° in field of view: ±60°. To improve the accuracy, a new calibration method based on integrated modeling with intrinsic and e...
Theoretical analysis on stiffness and damping characteristics of metal rubber
Zhu Bin, Ma Yanhong, Hong Jie
2011, 37(10): 1298-1302. doi: CNKI:11-2625/V.20111020.1126.004
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The theoretical research on hysteretic characteristic and nonlinear stiffness and damping characteristics of metal rubber was performed. Wire helix was considered as the micro-element structure of metal rubber by analyzing the characteristics of processing components of metal rubber. A mechanical mo...
Fast target detection based on area prediction and visual attention computation
Liu Qiong, Qin Shiyin
2011, 37(10): 1303-1307. doi: CNKI:11-2625/V.20111013.1436.004
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A new method of fast target detection was proposed with combination of area prediction and modeling computation of visual attention (VA). A rule set to predict target area was established based on the analysis of three feature parameters in three horizontal subareas: grayscale rate, entropy and its ...
Instantaneous phase based SNR estimation algorithm for BPSK signals
Zhang Xiaoyong, Luo Laiyuan
2011, 37(10): 1308-1311. doi: CNKI:11-2625/V.20111020.1126.001
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By studying of the characteristics of the instantaneous phase of the mixed signals of sinusoidal signal and additive white Gaussian noise (AWGN), a novel signal-to-noise ratio (SNR) estimation algorithm for binary phase shift keying(BPSK) signal was proposed. There is a nearly linear one to one rela...
Subsystem disturbance rejection control of turbo-shaft engine/helicopter based on cascade ADRC
Sun Liguo, Wang Rixian, Sun Jianguo, Zhang Haibo
2011, 37(10): 1312-1316. doi: CNKI:11-2625/V.20111020.1126.009
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Disturbance rejection control problem of turbo-shaft engine speed was studied. A disturbance rejection control scheme of turbo-shaft engine was proposed based on increment cascade adaptive disturbance rejection control (ICADRC). For one thing, cascade control structure was used to ensure that the di...
Fast transform and frequency estimation algorithm of finite Ramanujan Fourier transformation
Guo Xujing, Wang Zulin
2011, 37(10): 1317-1320,1325. doi: CNKI:11-2625/V.20111020.1126.006
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A new Ramanujan transformation (RFT) is an arithmetic transformation based on Ramanujan sums, well adapted to the analysis of signals with fractional frequency. First, spectrum characteristic for the finite Ramanujan transform and the distribution model of Ramanujan base vectors were presented. Seco...
Laser triangulation based measurement about the surface 3D topography of a cup CBN grinding wheel
Chen Feng, Chen Wuyi, Chen Zhitong
2011, 37(10): 1321-1325. doi: CNKI:11-2625/V.20111013.1708.014
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The limitation of the normal measuring methods about the surface topography of the grinding wheel was discussed, and the theory of the laser triangulation was expounded. Then, a method of measuring the surface topography of the wheel using the laser triangulation was proposed and the measuring syste...
AFDX modeling and simulation based on discrete event method
Huang Zhen, Zhang Yongtao, Xiong Huagang
2011, 37(10): 1326-1332. doi: CNKI:11-2625/V.20111013.1436.011
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Abstract:
For dimensioning avionics full duplex switched ethernet (AFDX) network, discrete event method was used. Devices in the network, such as end-system and switch, were modeled by the basic network elements. The communication behavior including VL control, message framing and switch forwarding etc. was d...

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