雷達(dá)目標(biāo)角度跟蹤環(huán)路濾波器設(shè)計(jì)新方法
doi: 10.11999/JEIT150389 cstr: 32379.14.JEIT150389
基金項(xiàng)目:
國(guó)家自然科學(xué)基金(61401207)
A Novel Design Method of Radar Target Angle Tracking Loop Filter
Funds:
The National Natural Science Foundation of China (61401207)
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摘要: 角度跟蹤環(huán)路在機(jī)載雷達(dá)對(duì)目標(biāo)的距離、速度、角度3維聯(lián)合跟蹤中起著至關(guān)重要的作用。該文分析指出傳統(tǒng)采用卡爾曼濾波算法形成角度跟蹤環(huán)路對(duì)機(jī)動(dòng)目標(biāo)角度進(jìn)行跟蹤時(shí)跟蹤精度低，角跟蹤誤差收斂速度慢的缺點(diǎn)，提出彎曲度檢測(cè)跟蹤環(huán)路濾波器(Bend Degree Tracking Loop Filter, BDTLF)設(shè)計(jì)方法，其利用彎曲度檢測(cè)角度曲線拐點(diǎn)，自適應(yīng)地調(diào)節(jié)環(huán)路濾波器環(huán)路等效噪聲帶寬，并以此來(lái)控制角度跟蹤環(huán)路。此算法加快了角跟蹤誤差的收斂速度，減輕了拐點(diǎn)處的角度濾波擾動(dòng)，保持了濾波性能的連續(xù)性。計(jì)算機(jī)仿真結(jié)果驗(yàn)證了該文方法相比于卡爾曼濾波算法、粒子濾波算法、-- 濾波算法及恒定系數(shù)環(huán)路濾波器方法，對(duì)弱機(jī)動(dòng)目標(biāo)角度跟蹤具有更加出色的性能。
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關(guān)鍵詞:
- 角度跟蹤 /
- 弱機(jī)動(dòng)目標(biāo) /
- 環(huán)路濾波器 /
- 拐點(diǎn)檢測(cè)
Abstract: The angle tracking loop in airborne radar facing to a maneuvering target plays a vital role in the joint 3D-tracking of range, velocity and angle. This paper analyses the disadvantage of the conventional Kalman filter algorithm employed to track a maneuvering targets angle, which are a low tracking precision and a slow convergence rate of angle tracking error. In order to solve these problems, a novel angle tracking algorithm called Bend Degree Tracking Loop Filter (BDTLF) is put forward to detect the corners in targets angle curve by bend degree detection and adjust the loop noise bandwidth adaptively to control angle tracking loop. The proposed algorithm accelerates the convergence rate in angle tracking loop, lightens the filtering disturbance around targets angle curve corners, and keeps the continuity of filtering performance. The computer simulation results demonstrate that compared with the angle tracking loop using Kalman filtering algorithm, particle filtering algorithm,-- filtering algorithm or a constant coefficient loop filter, this novel method has a more satisfying performance in angle tracking of weakly maneuvering targets.-
Key words:
- Angle tracking /
- Weakly maneuvering target /
- Loop filter /
- Corner detection
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