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Influences of prolate spheroidal baffle of sound diffraction on spatial directivity of acoustic vector sensor

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Science China(Technological Sciences) 2010年第10期53卷 2846-2852页

作者： JI JianFei, liang guolong, WANG Yan & LIN WangSheng National Laboratory of Underwater Acoustic Technology, Harbin Engineering University, Harbin 150001, China National Laboratory of Underwater Acoustic Technology Harbin Engineering University Harbin China

The directivity of acoustic vector sensor (AVS) will be distorted by the sound diffraction of the AVS carrier. In this paper,the scattering of a plane acoustic wave from a prolate spheroid baffle is considered. At first,the sound diffraction of prolate spheroidal baffle is established,then the mathematical expressions of sound pressure field and particle vibration velocity field of sound diffraction are derived and the characteristic of the directivity of pressure and velocity of sound diffraction field at different frequencies and distances is analyzed. The directivity of AVS is determined by the amplitude and phase difference of diffraction wave and incident wave,which possesses a close relationship with frequency and incident angle. Finally,the calculated results are compared with the experimental results.

关键词： prolate spheroidal baffle sound diffraction field spatial directivity vector sensor

Frequency-invariant robust adaptive beamforming based on interference covariance matrix reconstruction

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Chinese Journal of Acoustics 2014年第4期33卷 359-368页

作者： FAN Zhan liang guolong Science and Technology on Underwater Acoustic Laboratory Harbin Engineering University

Consider the problems of frequency-invariant beampattern optimization and robustness in broadband ***,a global optimization algorithm,which is based on phase compensation of the array manifolds,is used to construct the frequency-invariant *** with some methods presented recently,the proposed algorithm is not only available to get the global optimal solution,but also simple for physical ***,a robust adaptive broadband beamforming algorithm is also derived by reconstructing the covariance *** essence of the proposed algorithm is to estimate the space-frequency spectrum using Capon estimator firstly,then integrate over a region separated from the desired signal direction to reconstruct the interference-plus-noise covariance matrix,and finally caleulate the adaptive beamformer weights with the reconstructed *** design of beamformer is formulated as a convex optimization problem to be *** results show that the performance of the proposed algorithm is almost always close to the optimal value across a wide range of signal to noise ratios.

关键词： Frequency-invariant robust adaptive beamforming based on interference covariance matrix reconstruction

基于干扰协方差矩阵重构的恒定束宽鲁棒自适应波束形成

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声学学报 2015年第1期40卷 104-109页

作者：范展梁国龙哈尔滨工程大学水声技术重点实验室哈尔滨150001

针对宽带波束形成中的恒定束宽波束响应优化设计问题与鲁棒性问题展开研究。首先,提出一种基于相位补偿的恒定束宽全局优化设计方法,通过对阵列流形向量进行相位补偿来设计恒定束宽波束,与现有的一些方法相比,该方法不仅能获得全局最优... 详细信息

针对宽带波束形成中的恒定束宽波束响应优化设计问题与鲁棒性问题展开研究。首先,提出一种基于相位补偿的恒定束宽全局优化设计方法,通过对阵列流形向量进行相位补偿来设计恒定束宽波束,与现有的一些方法相比,该方法不仅能获得全局最优解,而且物理实现简单。同时,还提出一种基于协方差矩阵重构的鲁棒自适应宽带波束形成算法。该算法采用Capon估计器估计样本数据的空间一频率谱密度函数,然后对期望信号波达方向之外的角度区间进行积分来重构干扰加噪声协方差矩阵,最后利用重构的协方差矩阵设计自适应波束形成器权系数。该波束形成器设计问题被表述成凸优化问题求解。仿真结果表明,在整个输入信噪比范围内,该算法几乎都能获得接近理想值的输出信干噪比。

关键词：自适应波束形成器协方差矩阵恒定束宽矩阵重构鲁棒性干扰波束形成算法宽带波束形成

A subspace fitting algorithm of acoustic vector sensor array and corresponding matrix pre-filter design

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Chinese Journal of Acoustics 2014年第3期33卷 267-278页

作者： WANG Yan WU Wenfeng FAN Zhan liang guolong Science and Technology on Underwater Acoustic Laboratory Harbin Engineering University

In order to ease the pass-band response distortion of the matrix pre-filter,a simple approach for designing matrix spatial filter is proposed,which minimizes the sum of the k maximal distortion norm（k is the number of the constraint points）within the pass-band,while constraining the filter response within the *** the costly amount of calculation of the high-resolution methods,an algorithm with small amount of calculation based on matrix pre-filtering and subspace fitting using acoustic vector array（MF-VSSF）is *** joint processing of signal subspace of both pressure and particle velocity,the pre-filtering matrix and the signal subspace is decreased to M-dimensional（M is the number of array-element）,hence reduces the time-consumption of the matrix pre-filter design and DOA *** results show that,the method offers the same performance as MUSIC with pre-filtering,but has much lesser amount of ***,the designed prefilter can efficiently suppress the interference in the stop-band and improve the estimation and resolution performance of successive DOA estimators.

关键词： MUSIC A subspace fitting algorithm of acoustic vector sensor array and corresponding matrix pre-filter design

Variance-of-instantaneous-frequency detector and its performance evaluation

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Chinese Journal of Acoustics 1999年第1期18卷 19-28页

作者： liang guolong HUI Junying（Harbin Engineering University Harbin 150001）

The optimum detector for a determined signal in the stationary white noise background In ideal channels is a matched *** its performance degenerates seriously in a practical underwater acoustic system for the complexityof underwater acoustic *** on the estimation of instantaneous frequency sequence and its statistical characteristics，a new type ofrobust detector，Varlance－of-Instantaneous-Frequency Detector（VIFD for short），is presented for the detection of CW pulse according to the features of underwater acousticchannels and operating environment of active sonars． It is proved through theoretical analysis，simulation and experiments that VIFD is promising for its robustness in nonstatlonary interference background and channels and that it is alsorobust for the fluctuations and decny of signal or mlsmatch caused by Doppler－frequency shift．

关键词： Variance-of-instantaneous-frequency detector and its performance evaluation kHz

A parameter estimator based on adaptive noise canceller

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Chinese Journal of Acoustics 1996年第1期15卷 21-28页

作者： liang guolong and HUI Junying (Harbin Angineering driversity Harbin 150001)

The application of an adaptive noise canceller to parameter estimation is restricted for its unsatisfactory performance in the condition of high SNR input. In this paper based on an adaptive noise canceller, is presented a parameter estAnating method, which shows ulce filtering function and good tracking ability with ullknown prior information of interference and motion model of the object. The presented estimator only needs that the interference lloise varies faster than the parameter to be estimated. The presented method as a beedng esthaator was used to process the data collected in a sea experiment and the results show exciting property.

关键词： Adaptive noise canceller Parameter estimator Adaptive filtering

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分布式浮标阵高帧率异步水声定位

哈尔滨工程大学学报 2011年第3期32卷 288-293页

作者：王燕梁国龙付进哈尔滨工程大学水声技术实验室黑龙江哈尔滨150001

为增强水声定位系统的高帧率无模糊定位能力,提出了一种测量水下非合作高速运动目标轨迹的分布式浮标阵水声定位技术,将帧率提高到0.1 s量级.设计了组合脉冲串的信号形式,可在不产生距离模糊和不增加系统复杂度的前提下提高测量帧率.采... 详细信息

为增强水声定位系统的高帧率无模糊定位能力,提出了一种测量水下非合作高速运动目标轨迹的分布式浮标阵水声定位技术,将帧率提高到0.1 s量级.设计了组合脉冲串的信号形式,可在不产生距离模糊和不增加系统复杂度的前提下提高测量帧率.采用并行多通道自适应陷波器组和并行拷贝相关器组并联的信号处理结构,可有效抑制通道串漏和减小多普勒效应的影响.给出了定位系统湖试三维定位结果:水平x、y坐标和垂直z坐标的测量误差均小于1 m.

关键词：组合脉冲串高帧率异步水声定位自适应陷波器组拷贝相关器组

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基于稀疏信号重构的阵元位置误差校正方法

声学学报 2017年第6期42卷 677-684页

作者：梁国龙邱龙皓邹男哈尔滨工程大学水声技术重点实验室哈尔滨150001 哈尔滨工程大学水声工程学院哈尔滨150001

阵元位置误差的存在会严重影响水听器阵列的测向性能,为此在使用阵列之前需对该误差进行校正。针对这一需求,提出了一种对任意阵型适用的高精度阵元位置有源校正方法。结合远场阵列模型以及位置误差"有界"的特点,基于压缩感知理论,将阵... 详细信息

阵元位置误差的存在会严重影响水听器阵列的测向性能,为此在使用阵列之前需对该误差进行校正。针对这一需求,提出了一种对任意阵型适用的高精度阵元位置有源校正方法。结合远场阵列模型以及位置误差"有界"的特点,基于压缩感知理论,将阵元位置估计转化为对稀疏信号的重构过程,建立了阵元位置误差模型,构造了该模型下凸优化函数,并采用l_1-SVD(Singular Value Decomposition,SVD)方法进行求解,同时给出了物理解释和算法实施步骤。计算机仿真表明基于稀疏信号重构的校正方法性能明显高于子空间拟合算法,且性能接近相应克拉美罗下界,对于校正源方位误差有较强的容错能力,不受制于微小误差的假设以及初值的选取。该方法是一种可对阵列中的部分或全部阵元进行校正的高精度、稳健的有源校正算法。

关键词：位置误差校正方法信号重构位置估计阵列拟合算法校正算法水听器阵计算机仿真有源

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单矢量水听器方位频率联合估计算法

哈尔滨工程大学学报 2013年第1期34卷 46-50页

作者：梁国龙张柯范展哈尔滨工程大学水声技术重点实验室黑龙江哈尔滨150001

针对单矢量水听器估计信号多维参数问题,提出了一种利用状态空间模型联合估计方位和频率的新方法.利用单矢量水听器接收到的数据,构造一个特殊的状态空间模型,由此可得到包含了信号水平方位角和频率信息的状态过渡矩阵和观测矩阵.方位... 详细信息

针对单矢量水听器估计信号多维参数问题,提出了一种利用状态空间模型联合估计方位和频率的新方法.利用单矢量水听器接收到的数据,构造一个特殊的状态空间模型,由此可得到包含了信号水平方位角和频率信息的状态过渡矩阵和观测矩阵.方位角的估计值由状态过渡矩阵的特征值获得,频率的估计值由观测矩阵经过一定的数学变换获得,无需搜索过程并且能够实现参数的自动配对,不存在角度兼并的问题.由于状态空间方法对模型误差不敏感,因而具有更好的数值稳定性.仿真结果表明,该方法具有良好的估计性能.

关键词：单矢量水听器状态空间模型方位估计频率估计