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Estimation method of target motion parameter for mine platform

A motion parameter and target technology, applied in the field of target motion parameter estimation, can solve the problems that the positioning accuracy has a great influence, the underwater acoustic signal processing method cannot use the mine platform, and the concealment is high.

Inactive Publication Date: 2019-03-29
CSIC NO 710 RES & DEV INST
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Problems solved by technology

[0002] For the mine body of the current mine, the size is basically determined, and the size and formation of the head array used for positioning are basically determined. Due to the influence of the base array size, many underwater acoustic signal processing methods cannot be applied to the mine platform, and the mine service Restricted by conditions such as long period, limited energy, and high concealment, generally only passive methods are used
In the existing mine acoustic array, the time delay estimation theory can be used to estimate the azimuth and pitch information of the target, combined with the water depth information, to solve the motion parameters of the target, but there are still problems such as insufficient distance, slow convergence speed, and insufficient estimation accuracy. advanced questions
[0003] The existing directional attack mines can only passively locate the target by using the head plane ternary array, and use the pitch information of the target, combined with the water depth information, to obtain the position information of the target. This method has a higher estimate for short-range targets. Accuracy, for long-range targets, the positioning accuracy caused by the pitch angle error has a great influence, which cannot meet the requirements of accurate estimation of target motion parameters by sea mines under high pitch conditions

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  • Estimation method of target motion parameter for mine platform
  • Estimation method of target motion parameter for mine platform
  • Estimation method of target motion parameter for mine platform

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Embodiment 1

[0063] see figure 1 , which is a flowchart of a method for estimating target motion parameters for a mine platform provided by an embodiment of the present application. A method for estimating target motion parameters for a mine platform, comprising the following steps:

[0064] S1: Construct the mapping relationship between the initial value of the target motion parameter, the azimuth sequence of the target, and the Doppler frequency sequence, where the initial value of the target motion parameter is an unknown quantity in the mapping relationship, and the azimuth sequence and the Doppler frequency sequence is a known quantity in the mapping relationship.

[0065] S2: By setting the sliding window to extract the azimuth sequence of the target under the set time length {α m (k)} and the Doppler frequency sequence {f m (k)}, then the pseudo-linear least squares method is used to solve the mapping relationship to obtain the initial value of the first group of target motion pa...

Embodiment 2

[0158] Based on the above embodiments, this embodiment takes the surface ship as the target, and estimates the motion parameters of the surface ship.

[0159] The observation base array is a plane three-element array, which is deployed at a depth of 80m. The small boat is a surface target. The record time is 410s, the distance is 99.94m, and the speed is 7.97kn, about 4m / s.

[0160] Figure 4 gives the real track of the surface ship target, where 1 # The base array is a planar three-element base array, the target's frontal and horizontal distance is 99.9m, and the target track and measurement base array layout position are given by GPS. GPS outputs one point per second, and the radial distance between the target and the measurement array is given by two direct GPS measurement points, and the GPS measurement accuracy is within 3m.

[0161] Perform the following data processing:

[0162] Take the sampled data of 3 primitives.

[0163] Select the filter frequency band to filt...

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Abstract

The invention provides an estimation method of target motion parameters for a mine platform. A pseudo linear least square estimation method and the Kalman filtering algorithm are combined. The targetmotion parameters are initialized by adopting the pseudo linear least square estimation method to adaptively update target initial motion parameters. An optimal initial motion parameter is obtained asan iteration initial value of the Kalman filtering to solve the motion parameters of the target. The target motion parameter estimation method for the radar platform can increase the convergence speed and improve the estimation accuracy.

Description

technical field [0001] The invention belongs to the technical field of underwater acoustic signal processing, and in particular relates to a target motion parameter estimation method for a mine platform. Background technique [0002] For the mine body of the current mine, the size is basically determined, and the size and formation of the head array used for positioning are basically determined. Due to the influence of the base array size, many underwater acoustic signal processing methods cannot be applied to the mine platform, and the mine service Due to the limitations of long period, limited energy, and high concealment, generally only passive methods are used. In the existing mine acoustic array, the time delay estimation theory can be used to estimate the azimuth and pitch information of the target, combined with the water depth information, to solve the motion parameters of the target, but there are still problems such as insufficient distance, slow convergence speed,...

Claims

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Application Information

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IPC IPC(8): G01C23/00G01S11/14
CPCG01C23/00G01S11/14
Inventor 刘圣松杨光芦廷彬曹振宇李世智张恒
Owner CSIC NO 710 RES & DEV INST
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