水下无人系统学报

Five-Degree-of-Freedom Dynamic Model for Torpedo-Parachute System

DENG Li-tao, CAO Xiao-juan, MA Xia, YANG Chun-wu

2011, 19(1): 001-5. doi: 10.11993/j.issn.1673-1948.2011.01.001

[Abstract](1854) [PDF 221KB](711)

Abstract:
In the conventional torpedo-parachute system, the effect of parachute is simplified to a force acting on torpedo tail and being along airflow direction, which leads to inaccuracy in numerical analysis of coning motion. According to the fundamental principles of aerodynamics, we establish a five-degr...

Parametric Design of Cylinder Shell Based on Spreadsheet

SONG Bao-wei, YE Jing, CAO Yong-hui

2011, 19(1): 006-9. doi: 10.11993/j.issn.1673-1948.2011.01.002

[Abstract](1658) [PDF 217KB](688)

Abstract:
To shorten design period of autonomous underwater vehicle (AUV), this paper presents a new approach by taking optimization design of an AUV cylinder shell construction as an example. The UG′s modeling ability and the MATLAB′s scientific computing function are combined effectively by virtue of the sp...

Parametric Three-Dimensional Modeling for Torpedo Contra-Rotating Propeller Based on UG OPEN / API

HE Hui-jiang, LI Nan

2011, 19(1): 010-13. doi: 10.11993/j.issn.1673-1948.2011.01.003

[Abstract](1501) [PDF 199KB](1001)

Abstract:
Optimization design of contra-rotating propeller is an important part in torpedo shape design. This paper pre-sents a parametric three-dimensional modeling method for contra-rotating propeller based on UG’s second deve- lopment tools OPEN/API, and a parametric model of torpedo contra-rotating propel...

High Precision Frequency Estimation Method of Torpedo Acoustic Fuse Target Echo

XIE Sheng, CHEN Hang, YU Ping

2011, 19(1): 014-19. doi: 10.11993/j.issn.1673-1948.2011.01.004

[Abstract](1790) [PDF 433KB](818)

Abstract:
The estimation accuracy of Doppler frequency is affected by the body target effect in near field region of submarine and torpedo, therefore a fast and accurate frequency estimation method is presented in this paper to acquire Doppler frequency in submarine target echo. This method is a combined freq...

High Resolution Acoustic Imaging for Torpedo Target Recognition with Sparse Array

FAN Shu-hong, WANG Ying-min, YUE Ling, KANG Wen-yu

2011, 19(1): 020-26. doi: 10.11993/j.issn.1673-1948.2011.01.005

[Abstract](1727) [PDF 425KB](760)

Abstract:
Underwater acoustic imaging and image guidance are the most effective ways to torpedo target recognition and intelligent precision guidance in modern complex underwater acoustic countermeasure of battlefield environment. In order to realize target image recognition and precise image guidance in torp...

A Signal Detection Method for Ship Laser Wake Homing Torpedo

GUO Hu-sheng, LIU Qi-zhong, CHEN Chen

2011, 19(1): 027-30. doi: 10.11993/j.issn.1673-1948.2011.01.006

[Abstract](1403) [PDF 300KB](725)

Abstract:
In torpedo′s detecting underwater target with laser, the backscattering echo is much stronger than the useful tar-get-reflected signal, which makes signal detection and processing very difficult. Therefore, we present an effective laser wake detection method, in which a new adaptive interference can...

A Time Series Modeling and Real Time Filtering Method for FOG Random Noise

HU Jun-wei, LIU Ming-yong, ZHANG Jia-quan

2011, 19(1): 031-34. doi: 10.11993/j.issn.1673-1948.2011.01.007

[Abstract](1310) [PDF 177KB](627)

Abstract:
In order to reduce the random noise of fiber optic gyroscope (FOG), the random noise of FOG is analyzed and modeled by time series analysis method. Based on the established auto regression moving average（ARMA）(2, 1) model, a method that combines modified recursive extended least squares (RELS) algor...

A New Nonlinear Variable Structure Guidance Law for Torpedo

DING Hao, YOU Wen-li, TENG Da

2011, 19(1): 035-38. doi: 10.11993/j.issn.1673-1948.2011.01.008

[Abstract](1758) [PDF 261KB](793)

Abstract:
Torpedo′s target pursuit capability highly dependents on the design of high performance guidance law. In this paper, equations for 3D relative motion between torpedo and targets are built by using global coordinates. Variable structure theory is used to design a new torpedo nonlinear guidance law, a...

A Count Assessment Method of Navigation Localization Accuracy Based on Dual Circular Area for AUV

ZHANG Ning, ZHANG Fu-bin, BAO Hong-jie, ZHANG Yong-qing

2011, 19(1): 039-42. doi: 10.11993/j.issn.1673-1948.2011.01.009

[Abstract](1667) [PDF 196KB](736)

Abstract:
Navigation localization accuracy is an important technical index for an autonomous underwater vehicle (AUV). The probability circle assessment method is not easy to make a quick decision when the navigation accuracy is much lower than the accuracy index and the probability circle radius is selected ...

A Storage Reliability Evaluation Method of Lithium Battery Based on Capability Degenerate Data

HUANG yan, SONG Bao-wei, XIE Ya-li

2011, 19(1): 043-47. doi: 10.11993/j.issn.1673-1948.2011.01.010

[Abstract](1612) [PDF 185KB](731)

Abstract:
The high power lithium batteries often display few failures but more energy loss in storage. Their energy pa-rameters and metrical data are indeterminate and incomplete. In order to evaluate the storage reliability of the battery, this paper presents a method, in which a fuzzy membership function is...

Numerical Simulation about Combustion Performance of Choked Combustor of Turbine

QIAO Hong, ZHAO Wei-bing, MA Xiao-li, SHI Hai-chao

2011, 19(1): 048-54. doi: 10.11993/j.issn.1673-1948.2011.01.011

[Abstract](1601) [PDF 558KB](666)

Abstract:
In order to study the form of turbine combustor and verify its performance, a new choked combustor scheme which is suitable for tri-propellant and matches the lower gas inlet pressure of a turbine under low operating condition was proposed. The combustion characteristics of scheme under multi-operat...

Operational Effectiveness Evaluation for Intelligent Mine Based on Grey Theory

ZHANG Dong, SONG Yu-nong

2011, 19(1): 055-58. doi: 10.11993/j.issn.1673-1948.2011.01.012

[Abstract](1137) [PDF 169KB](598)

Abstract:
Intelligent mine is the major weapon in the future naval blockade. Based on the evaluation system of intelli-gent mine, this paper determines the evaluation index weights by employing the improved weight analysis, and estab-lishes an evaluation model with the improved gray theory. Taking intelligent...

Two Probability Model of SLMM Hitting Predetermined Obstacle Zone

LENG Xiang-wen, ZHAO Xiao-zhe, ZHANG Xu, ZHU Hong-bo

2011, 19(1): 059-62. doi: 10.11993/j.issn.1673-1948.2011.01.013

[Abstract](1504) [PDF 193KB](665)

Abstract:
Based on the operational specialty of submarine launched mobile mine(SLMM), two general models which describe the probability of SLMM hitting predetermined obstacle zone were established. Two examples were simulated to verify the models. The simulation results of both models concerning regularity, a...

Operational Model for Intercepting Uncertain Type of Torpedo with Hovering Depth Charge

YAO Feng-liang, JIA Yue, DING Bei

2011, 19(1): 063-67. doi: 10.11993/j.issn.1673-1948.2011.01.014

[Abstract](1171) [PDF 217KB](752)

Abstract:
How to use hovering depth charge to intercept torpedo is one of the main problems in surface ship torpedo defense. Fuzzy mathematics knowledge is used in this paper for dividing a torpedo warning distance into near, middle, and far fields to establish torpedo warning distance functions and estimate ...

Inner Trajectory Modeling and Simulation of Hydraulic Energy Accumulated Torpedo Launcher

TIAN Bing, WANG Shu-zong, LIAN Yong-qing

2011, 19(1): 068-71. doi: 10.11993/j.issn.1673-1948.2011.01.015

[Abstract](1705) [PDF 199KB](1564)

Abstract:
For its low launching noise and absence of increasing pressure in chamber, the hydraulic energy accumulated torpedo launcher has held navies′ interest around the world. In this paper, to research the inner trajectory characteristic of the launcher, an inner trajectory model for the launching course ...

An Incoming Torpedo Warning System Based on Ship Early Underwater Defense

LI Wei, WANG Hong-sheng, TIAN De-hai

2011, 19(1): 072-76. doi: 10.11993/j.issn.1673-1948.2011.01.016

[Abstract](1591) [PDF 195KB](860)

Abstract:
According to the requirement of threat information acquisition for ship early underwater defense, this paper analyzes the tactic and technical indexes of incoming torpedo warning system, including the detection range, working band, action space, signal recognition, automation and time continuity, ex...

A Test Method of Gas Turbine Performance Analog for Underwater Vehicle

CHEN Gang, SHI Hai-chao, YI Jin-bao, ZHAO Hai-Tao

2011, 19(1): 077-80. doi: 10.11993/j.issn.1673-1948.2011.01.017

[Abstract](1783) [PDF 280KB](768)

Abstract:
Aiming at the shortcomings in power system test, the fundamental principle of gas turbine for underwater vehicle is analyzed. Based on the aerodynamics and the flow field similarity theory, the test principle and method of gas turbine performance analog are discussed, and a test method for verifying...

2011 Vol. 19, No. 1

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