水下无人系统学报

Overview of Technology Development and System Design of UUVs

QIAN Dong, TANG Xian-ping, ZHAO Jiang

2014, 22(6): 401-414. doi: 10.11993/j.issn.1673-1948.2014.06.001

[Abstract](1454) [PDF 2565KB](2499)

Abstract:
To promote UUV design for both civil and military applications, the grading and diameter restriction of military UUVs are discussed, and the performances and characteristics of popular UUVs in world market are summarized. The key architectural aspects of UUVs are analyzed, such as overall formations, propulsors, control surfaces, energy systems, pressure hulls and wet volume, sensors, communication, launch and recovery. The typical structure properties of UUVs and the influencing factors are discussed. Suggestions about design of military UUVs are offered as follows: 1) open structure and modularization should be adopted for multi-task requirement; 2) medium-weight and lightweight UUVs should take the diameter of 533 mm or 324 mm to meet the military suitability; and 3) watertight components and payloads should be designed for deep diving UUVs in order to decrease the difficulty in manufacture of pressure hulls.

Current Situation and Development Trend of Torpedo Acoustic Stealth Technologies Abroad

ZHANG Chi, ZHANG Zhi-min

2014, 22(6): 415-419. doi: 10.11993/j.issn.1673-1948.2014.06.002

[Abstract](944) [PDF 180KB](1260)

Abstract:
The significance and characteristics of torpedo acoustic stealth are introduced, and the current situation of torpedo acoustic stealth technologies abroad is discussed with emphasis on the research hotspots of torpedo acoustic stealth technologies in Russia and USA. Development trend of torpedo acoustic stealth technology is forecasted, in-cluding continually improving research systems, paying more attention to mechanism study, increasing investment in new materials and techniques, and promoting test technology in regular sequence.

Application of Adaptive Federated Kalman Filter Algorithm to Multi-parameter Estimation for Torpedo Navigation and Positioning

CAO Meng, LI Jian-chen, GUO Lin-na, HUANG Hai, HONG Jian-ying

2014, 22(6): 420-424. doi: 10.11993/j.issn.1673-1948.2014.06.003

[Abstract](1297) [PDF 476KB](500)

Abstract:
Considering the particularity of torpedo underwater navigation, a new adaptive Kalman filter algorithm for torpedo multi-parameter estimation is presented for the purpose of torpedo navigation and positioning. Hence, the low filtering precision due to the uncertainty of the measurement noise′s statistical characteristics of Kalman filter in inte-grated navigation can be improved. This algorithm can conduct filtering calculation via measurement noise′s adaptive information with unknown statistical characteristics of noise. Moreover, a new adaptive information distribution strategy for information fusion is proposed. This distribution strategy can determine the information distribution coefficient of each sub-filter by making use of the estimated mean square error matrix, and make the variation of the coefficient de-pend on the optimal performance of the sub-filter at any time. Comparison between the simulations of the proposed al-gorithm and the normal Kalman filter algorithm verifies the effectiveness of the proposed algorithm.

Electromagnetic Fuze Technology for Torpedo Based on Frequency Hopping Detecting System

YAN Zheng-tong, XIAO Su-juan, CUI Hu-shan, SHI Xiao-hai, FAN Shu-hong, CHEN Ya-lin

2014, 22(6): 425-429. doi: 10.11993/j.issn.1673-1948.2014.06.004

[Abstract](1043) [PDF 356KB](617)

Abstract:
To improve the anti-jamming performance of torpedo active electromagnetic fuze, the frequency hopping technology is applied to the design of torpedo active electromagnetic fuze. Accordingly, a frequency hopping fuze sys-tem based on the high-speed digital signal processing and direct digital frequency synthesizer(DDFS) is proposed. The principle of the fuze system is elaborated with focus on the generation of the frequency hopping signal and the process-ing of the echo signal. And the anti-jamming performance of frequency hopping fuze is analyzed in theory and simula-tion. Simulation results show that the broadband frequency hopping working system can improve the anti-jamming per-formance of torpedo active electromagnetic fuze.

A Target Monitoring Method in Shallow Water Based on Time Reversal Processing

QU Shao-chun, WANG Ying-min, ZHENG Kun

2014, 22(6): 430-435. doi: 10.11993/j.issn.1673-1948.2014.06.005

[Abstract](951) [PDF 1161KB](466)

Abstract:
A method to generate a cordon based on the time reversal processing for real-time target monitoring and judgment in shallow water is proposed. The effects of target strength and depth, the horizontal distance between the target and the source received array, and other factors on the sensitivity of the monitoring system are analyzed theo-retically. Numerical simulations and theoretical calculations for typical shallow water environment demonstrate that the proposed method is better than conventional alert method in shallow water. The proposed method is suitable for detect-ing small targets and the targets with small scattering echo intensity, and is not influenced by complex shallow water acoustic channel and multi-path effects.

Principle of Biomimetic Detection Based on Flow Field Information of Underwater Moving Object

MA Feng, ZHANG Jing-xiao, JIA Xi-yu, LU Xi, WANG Shu-shan

2014, 22(6): 436-441. doi: 10.11993/j.issn.1673-1948.2014.06.006

[Abstract](1014) [PDF 635KB](580)

Abstract:
Fish lateral line explores water flow information on the purpose of environment perception and recognition. It inspires a new development direction to underwater detection technology. Based on the biomimetic detection principle of the lateral line, this study focuses on the detection principle of a moving object by taking the flow field around the object as information source. A round-head-cylinder simulation model is established to reveal the relation between the features of underwater moving object and the characteristic parameters of flow field by combining potential flow theory with simulation. Thus, the characteristic parameters corresponding to velocity, length, radius, and observing point information of a moving object are obtained through the calculation of peak value, valley value and slope of the relation curves. Moreover, the possibility to conduct biomimetic detection of an underwater moving object by making use of the flow field information around the object is discussed.

Fidelity Analysis of a Scale Target Simulator

CHEN Jian-Qing, ZHAO Jun-Jie

2014, 22(6): 442-446. doi: 10.11993/j.issn.1673-1948.2014.06.007

[Abstract](1147) [PDF 208KB](516)

Abstract:
On the basis of the common conclusion of echo characteristics of a submarine and the general recognition method for a torpedo, we take single-receiving multi-transmitting scale target simulator for example to analyze the en-gineering model of a scale target simulator and the key parameter in engineering implementation. Simulation results show that this simulator has insufficiencies in Doppler frequency shift, time delay, and target strength of multi-highlight structure echo, which infers a large space for improvement. This study may provide a reference for further optimization of the scale target simulation technology.

Numerical Simulation of Hydroreactive Metal Fuel Ramjet Spray Angle for Once Water Penetration

FENG Yao-fei, 2 YI Yin, SHI Xiao-feng, HAN Xing-bo, QIAO Hong, XIAO Bo

2014, 22(6): 447-451. doi: 10.11993/j.issn.1673-1948.2014.06.008

[Abstract](932) [PDF 1109KB](474)

Abstract:
To investigate the influence of spray angle on once water penetration reaction in hydroreactive metal fuel ramjet, a once water penetration combustion model of hydroreactive metal fuel ramjet is built and simulated. The hy-droreactive characteristics and the flow field characteristics are analyzed. The diameter of magnesium particles, and the nozzle′s location and spray angle are changed for comparative analysis. The results indicate that: in the position where hydro-reaction is fierce, the volatilization of water drops is fierce; the temperature distribution of flow field is related to the magnesium drops, i.e. the temperature of flow field is lower in the position with more magnesium drops, while the temperature is higher in the position with less magnesium drops; the increase in diameter of magnesium particles results in a backward movement of the fierce hydroreactive region; spray angle has an effect on flow field characteristics; and different magnesium particle diameter corresponds to different optimum spray angle and location of nozzle.

Parameters Identification of Permanent Magnet Synchronous Motor Based on Recursive Least Squares

QIAN Xin, WANG Chong-wu, YU Kun-kun, JIANG Zhi-yuan

2014, 22(6): 452-456. doi: 10.11993/j.issn.1673-1948.2014.06.009

[Abstract](1292) [PDF 445KB](1225)

Abstract:
For the change of the electromagnetic parameters of a permanent magnet synchronous motor in running, a steady-state model of permanent magnet synchronous motor is deduced to identify the resistance and inductance of the motor online by means of recursive least squares(RLS). Simulation via Matlab/Simulink demonstrates that the proposed parameters identification method is accurate, reliable and easy to implement, and RLS can track the electromagnetic parameters accurately.

Simulation on Critical Rotation Speed of High-Speed Rotor of Gas Turbine

LI Ri-zhao, HAO Dong-xu

2014, 22(6): 457-460. doi: 10.11993/j.issn.1673-1948.2014.06.010

[Abstract](923) [PDF 577KB](578)

Abstract:
To ensure a gas turbine working in the safe rang of speed without resonance, it is necessary to obtain the critical rotation speed of its high-speed rotor. In this study, the critical rotation speed of a high-speed rotor is calculated by using the transfer matrix method and the finite element method, respectively. Experiments verified the feasibility and accuracy of the two methods. This study may provide a support to engineering design of high-speed rotor of gas turbine.

A Digital PID Control System for Torpedo Depth Simulator

ZHAO Yu, GAO Tian-zhu, CHEN Jing, WANG Li-wen, KOU Xiao-ming

2014, 22(6): 461-464. doi: 10.11993/j.issn.1673-1948.2014.06.011

[Abstract](859) [PDF 620KB](422)

Abstract:
For improving such performances as response speed and control precision of a depth simulator in torpedo hardware-in-the-loop simulation test, a dynamic digital proportion-integration-differentiation(PID) control system was developed on the basis of PC104 products. The control system adopts the master/slave computers structure, and realizes communication through a serial port. Aiming at the problems in PID control, such as integral saturation, anti-interference, and dynamic process acceleration, a corresponding control correction algorithm was designed to guarantee the control speed and precision of the system. By analyzing the hardware-in-the-loop simulation test data of a torpedo, it is proved that the depth simulator with this PID control system achieves very good performances and meets the requirement in actual use.

Testability Verification Test Method of False Alarm Rate for Torpedo Based on Built-in Test and Automatic Test Equipment Teamwork

GAO Jiang, HE Cheng-gang, XU Hong-rui

2014, 22(6): 465-469. doi: 10.11993/j.issn.1673-1948.2014.06.012

[Abstract](691) [PDF 314KB](479)

Abstract:
The false alarm rate is one of the main problems blocking the development of torpedo testability technology. In this paper, a verification test method of false alarm rate for a torpedo is presented based on the combination of built-in test (BIT) and automatic test equipment(ATE) together with manual testing and comprehensive diagnosis. By comparing the characteristics of verification test between spontaneous faults and simulation faults, spontaneous faults are selected as the verification test sample. The verification test method is discussed from the aspects of test preparations, imple-mentation procedure and test scheme. Example verifies the correctness and rationality of the present method.

Discussion on Disposal of Range Test Quality Problem

CHEN Dong-ke, WANG Xin

2014, 22(6): 470-472. doi: 10.11993/j.issn.1673-1948.2014.06.013

[Abstract](922) [PDF 150KB](491)

Abstract:
Unqualified products will be produced in a range identification test process. The disposal of the unqualified products is an important content of quality management in the range test process. Because the existing range quality system documents do not give detailed definition and disposal method of the unqualified products, it is difficult for the range test staff to accurately understand the definition and correctly execute the disposal method, which affects quality judgment and test efficiency. In this paper, the definition and classification of unqualified products are described. And the composition of examination organization for the unqualified products, the identification and examination of the un-qualified products, the disposal of the unqualified products, and the corrective measures are expounded. This study may provide a reference to the members involved in design approved test from range and related units.

Cooperative Operation Simulation System of Network Torpedo Based on Distributed Interactive Simulation Platform

NI Wen-xi, ZOU Qi-ming, ZHENG Wei, Lü Wei

2014, 22(6): 473-478. doi: 10.11993/j.issn.1673-1948.2014.06.014

[Abstract](1196) [PDF 536KB](461)

Abstract:
According to the principle of cooperative operation of a network torpedo, an underwater network topology model and a cooperative operation simulation model of the network torpedo are established. Further, a coopera-tive operation simulation system is constructed based on the distributed interactive simulation platform. Many opera-tional scenarios are designed to realize cooperative operation simulation of the network torpedo. Simulation results show that the proposed cooperative operation simulation system of the network torpedo is feasible.

2014 Vol. 22, No. 6

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