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Hu Q.,Science and Technology on Underwater Information and Control Laboratory | Hao B.,China Shipbuilding Industry Corporation | Yi H.,Science and Technology on Underwater Information and Control Laboratory | Yang Y.,Science and Technology on Underwater Information and Control Laboratory
Advanced Materials Research | Year: 2011

Due to the high-speed, short-time countermeasure and small target strength of underwater high-speed small targets (UHSST), it is difficult to use a traditional method to accurately detect UHSST. So a novel passive detection model based on three-dimensional hyperbeam forming (3D-HBF) and fuzzy support vector data description (FSVDD) is proposed, where these advantages of beam width reduction and side lobe suppression for 3D-HBF and excellent target-detection capability for FSVDD are combined. The model consists of two stages. In the first stage, 3D-HBF is carried out to obtain the beam respond vectors (BSV) from original underwater acoustic signals. In the second stage, the BSV are input into the detector based on FSVDD to detect and locate the underwater targets intelligently. This model is applied to target detection of UHSST, and these testing results show that the proposed model has better detection performance than the conventional beam forming method, with a high detection success rate and localization capability. © (2011) Trans Tech Publications. Source


Shen S.,China Shipbuilding Industry Corporation | Shen S.,Science and Technology on Underwater Information and Control Laboratory | Hong C.,China Shipbuilding Industry Corporation | Mingzhou W.,China Shipbuilding Industry Corporation | Mingzhou W.,Science and Technology on Underwater Information and Control Laboratory
Proceedings of the 2013 International Conference on Advanced Information Engineering and Education Science, ICAIEES 2013 | Year: 2013

Based on the nonlinear dynamics theory, the feature of the sinusoidal signal, the active homing echo signal and the active homing echo signal after filtering and normalizing is presented detailedly in this paper. Through the analysis of the phase trajectory, the phase trajectory slope and the slope spectrum's changing rule of a certain number of measured active homing echo signal sample data, it can be seen that the phase trajectory motion characteristic, the slope and the slope spectrum's changing rule have certain separability. © 2013. The authors - Published by Atlantis Press. Source


Yang B.-M.,China Shipbuilding Industry Corporation | Yang B.-M.,Science and Technology on Underwater Information and Control Laboratory | Li W.,China Shipbuilding Industry Corporation | Li W.,Science and Technology on Underwater Information and Control Laboratory
Xitong Fangzhen Xuebao / Journal of System Simulation | Year: 2011

Underwater combat is more and more complex in modern sea war environment. In order to improve an operational efficiency, it is necessary to improve the ability of target identification in underwater vehicle homing system. Acoustic image method is one of an important branch in target recognition and anti-counter measure fields, which helps the underwater vehicle to recognize the real target among fakes, to determine the crucial part of the target in complex combat fields. Main composing and implemental method of acoustic image simulation system were introduced, which was used in underwater vehicle. Real characteristic of target was obtained for forming the acoustical image of the target. Quadrature demodulation, plural multi-beam forming, image interpolation, image process technology were used to form the acoustic image. The experiment proves that this method has supplied an effective way for underwater vehicle to recognize, to attack the target efficiently. Source


Liu W.,Northwestern Polytechnical University | Liu W.,Science and Technology on Underwater Information and Control Laboratory | Li X.,Northwestern Polytechnical University | Li X.,Science and Technology on Underwater Information and Control Laboratory | And 2 more authors.
Applied Mechanics and Materials | Year: 2012

A gateway based on ARM is presented to achieve mutil-protocol conversion among different electronic control units. To guarantee its real-time ability and stability, the μC/OS-II embedded operation system was adopted. The first-in-first-out data queue is used to balance the communication rate among the different communication protocols which consist of the Controller Area Network, TCP/IP and RS-232. The gateway can be used in remotely manipulation between the console with Ethernet and remote underwater vehicle with other serial communication protocols. © (2012) Trans Tech Publications, Switzerland. Source


Lv W.,China Shipbuilding Industry Corporation | Lv W.,Science and Technology on Underwater Information and Control Laboratory | Wang Z.,China Shipbuilding Industry Corporation | Li J.,China Shipbuilding Industry Corporation | And 7 more authors.
2012 5th International Congress on Image and Signal Processing, CISP 2012 | Year: 2012

In order to compare the performances of STAP for the underwater LFM with CW signal, the method of STAP for LFM was proposed. First, the principle of STAP for CW was analyzed, according to the underwater echo of CW. Second, the space-time steering vector of LFM is deduced by analysing the underwater echo of LFM. At last, the performances of STAP for LFM and CW were compared by simulation. The results show that the proposed method of STAP for LFM can achieve the good performance in target detection and tetection, but CW has the superiority in the performance of STAP. © 2012 IEEE. Source

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