Scanning radar-based target three-dimensional acceleration motion model calculating method

A technology of three-dimensional acceleration, calculation method, applied in the direction of reflection/re-radiation of radio waves, instruments, measuring devices, etc.

Pending Publication Date: 2019-06-07
中国船舶集团有限公司第七二四研究所
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Problems solved by technology

[0004] The purpose of the present invention is to provide a solution to the problem of point trace g

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  • Scanning radar-based target three-dimensional acceleration motion model calculating method
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  • Scanning radar-based target three-dimensional acceleration motion model calculating method

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Embodiment Construction

[0013] The present invention basically includes the key processing steps of target motion calculation model, position space transformation, radar azimuth calculation, step update and sampling time calculation.

[0014] 1) Target motion model and its mathematical description;

[0015] In order to uniformly describe the target motion, simplify the model, ignore the influence of gravity and resistance, simply assume that the target is only in the tangential acceleration Normal acceleration value (a n ,λ), where a t ∈ R, a n ≥0 are the acceleration values ​​in the tangential and normal directions respectively, and the heading angle is defined as (θ, φ), θ is the angle between the heading and the xy plane, and φ is the angle between the heading angle on the xy plane and the positive x axis, When the normal acceleration is 0, it is considered that the target is moving on the x-y plane where the current relative position is after a certain angle of rotation. It is required that t...

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Abstract

The invention proposes a scanning radar-based target three-dimensional acceleration motion model calculating method. According to the method, theoretical analysis is carried out at first, and then, adata processing flow is designed. According to the theoretical analysis, the mathematical formula of two-dimensional space target free motion is derived based on acceleration factor analysis; a targetthree-dimensional position information-to-two-dimensional projection matrix and a target two-dimensional position-to-three-dimensional space transformation matrix are obtained by means of derivation;and the influence of calculation step length selection and sampling time point selection on data precision under multi-platform and multi-radar working modes is analyzed. According to the design of the data processing flow, after target motion state and radar working parameter initial setting is completed, the relative polar coordinate position of a target relative to a radar at a sampling time point is calculated through using a target motion model formula, and the normal direction of the radar at the sampling time point is further calculated; whether it is necessary to output a point trajectory is judged through a post-scanning judgment criterion; and after each calculation step length is terminated, target point trajectory position information is corrected based on the error information of the radar, and is sequenced and outputted according to time.

Description

technical field [0001] The invention belongs to the field of active radar data processing. Background technique [0002] Several problems are faced in the research and improvement of active radar data processing algorithms, including high cost of data collection, few target motion models, difficulty in reproducing extreme moving targets, limited target activity space, and lack of true values ​​for non-cooperative targets. These difficulties lead to a small sample size of target data for typical sports, limited space for adaptability testing, training and analysis of data processing and data fusion algorithms, and cannot meet the needs of complex sports data processing and multi-platform data fusion, and it is difficult to achieve in-depth analysis of processing algorithms and continuous improvement. At present, there are few papers in the field of target motion simulation and point trace calculation, mainly relying on classical algorithms to solve the target to do uniform l...

Claims

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Application Information

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IPC IPC(8): G01S13/88G01S7/02G01S7/40
Inventor 崔威威黄孝鹏姚远丁春
Owner 中国船舶集团有限公司第七二四研究所
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