系數(shù)矩陣正定的單信標(biāo)測(cè)距定位算法
doi: 10.11999/JEIT160604 cstr: 32379.14.JEIT160604
基金項(xiàng)目:
國(guó)家自然科學(xué)基金(61531012),國(guó)防基礎(chǔ)科學(xué)研究計(jì)劃(B2420133002)
A Single Beacon Location Algorithm with Positive Definite Coefficient Matrix
Funds:
The National Natural Science Foundation of China (61531012), The National Defense Basic Scientific Research program of China (B2420133002)
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摘要: 基于單信標(biāo)測(cè)距的定位方法是水聲定位技術(shù)的進(jìn)一步發(fā)展,該文對(duì)直線航跡下的單信標(biāo)測(cè)距定位進(jìn)行研究。一方面,對(duì)于直線航跡,常規(guī)的直接降階求解的算法已不適用。另一方面,水下載體的直線航跡或者直線航跡的延長(zhǎng)線經(jīng)過信標(biāo)時(shí),線性化迭代求解的算法不能夠?qū)d體進(jìn)行定位。系數(shù)矩陣幾乎奇異或者壞條件時(shí),方程的解算結(jié)果誤差會(huì)明顯增大。該文針對(duì)前述解算方法存在的問題,提出一種改進(jìn)的單信標(biāo)測(cè)距定位解算方法,適當(dāng)增加對(duì)角元使得系數(shù)矩陣正定,克服系數(shù)矩陣奇異或者壞條件時(shí)所帶來的影響。仿真結(jié)果表明:該文算法大部分的情況下定位精度和高斯牛頓法一樣;水下載體的直線航跡或者直線航跡的延長(zhǎng)線經(jīng)過信標(biāo)時(shí),該文算法同樣能夠?qū)崿F(xiàn)定位解算;在線性化迭代的低精度區(qū),該文算法能非常明顯地提高定位精度。通過海上試驗(yàn),進(jìn)一步驗(yàn)證了該文算法的有效性。
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關(guān)鍵詞:
- 單信標(biāo)測(cè)距 /
- 直線航跡 /
- 虛擬信標(biāo) /
- 對(duì)角元
Abstract: The positioning method based on single beacon ranging is the further development of the underwater acoustic positioning technology. In this paper, the location of single beacon ranging based on the straight path is studied. On one hand, the conventional direct reduction method is not applicable to the straight path. On the other hand, when the beacon is in the straight line or the extension of the straight line, the linear iterative algorithm can not locate the carrier. When the coefficient matrix is almost singular or bad condition, the error of the solution will obviously increase. In this paper, an improved algorithm is proposed to solve the problems existing in the solving method, which can overcome the influence of singular or bad condition of coefficient matrix. Simulation results show that the localization accuracy of the proposed algorithm is similar to that of the Gauss Newton method in most cases. This algorithm can also realize the positioning calculation when the beacon is in the straight line or the extension of the straight line. This algorithm can obviously improve the positioning accuracy where the positioning accuracy is not high when using the linear iterative algorithm. The effectiveness of the proposed algorithm is verified by experiments on the sea.-
Key words:
- Single beacon ranging /
- Straight line track /
- Virtual beacon /
- Diagonal element
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