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Method for estimating measuring angle error in bearings-only passive positioning

A passive positioning and error estimation technology, used in positioning, radio wave measurement systems, measurement devices, etc., can solve the problems of low estimation accuracy and estimation methods relying on estimated values, etc., to improve estimation accuracy, improve estimation accuracy, and improve The effect of positioning accuracy

Active Publication Date: 2019-02-22
PLA OF CHINA AIR FORCE EARLY WARNING ACADEMY LEIDA SERGEANT SCHOOL
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Problems solved by technology

[0005]Aiming at the deficiencies in the prior art, the purpose of the present invention is to provide a method for estimating angle measurement error in pure azimuth passive positioning, which solves the problem of existing estimation The method relies heavily on the estimated value of the target position, and the estimation accuracy is not high

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  • Method for estimating measuring angle error in bearings-only passive positioning
  • Method for estimating measuring angle error in bearings-only passive positioning
  • Method for estimating measuring angle error in bearings-only passive positioning

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Embodiment 1

[0057] Embodiment 1: Implementation conditions: Consider a positioning scenario of a single motion sensor and a single fixed target. Suppose the target position is X=(30,35)′km; the sensor motion equation is y=-0.2x+14, and x∈[15,30]km, the sampling interval is 0.1km; the standard deviation of sensor angle measurement error σ∈ [1,10]°. In order to analyze the advantages and disadvantages of the algorithm performance, the angle measurement error estimation results of the present invention are compared with the estimation results of TLS (total least squares), projection CTLS (structural total least squares), and first-order derivative CTLS algorithms respectively. The so-called projection CTLS method is based on nonlinear programming and projection technology so that the positioning equation still has the structure of the original LS equation, and each row in the data vector is the inner product of the corresponding row vector in the coefficient matrix and the sensor position, a...

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Abstract

The invention, which relates to the technical field of passive positioning, discloses a method for estimating a measuring angle error in bearings-only passive positioning. The method includes the following steps: step 1, performing first-order Taylor series expansion on a measurement equation to obtain a bearings-only positioning equation; and step 2, performing loop iteration on the positioning equation to obtain weighted least squares estimation of a target position and thus obtaining an azimuth estimation error. The positioning equation contains a measuring angle error term, so that the estimation accuracy of the measurement angle error can be effectively improved and the effect is obvious especially under the condition of having a large measurement angle error. The measurement angle error obtained by the method can be applied to a weighted or deviation compensation positioning algorithm, so that the positioning accuracy of the algorithm can be effectively improved.

Description

technical field [0001] The present invention relates to the technical field of passive positioning, in particular to a method for estimating an angle measurement error in azimuth-only passive positioning, which is applicable to multiple fixed sensors, single moving targets or single moving sensors, and single fixed (or moving) targets Estimation of angle measurement error in azimuth-only positioning scenarios of . Background technique [0002] Passive positioning technology has the characteristics of good concealment performance and strong survivability, making it widely used in military and civilian positioning scenarios such as electronic warfare and passive sonar. In the azimuth-only positioning technology that only uses target azimuth information, since the angle measurement error can be used to calculate the weighted matrix or construct a deviation compensation positioning algorithm, thereby significantly improving the positioning accuracy of the original algorithm, the...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S5/02
CPCG01S5/02
Inventor 王本才唐志凯秦开兵何缓付莹许晓剑
Owner PLA OF CHINA AIR FORCE EARLY WARNING ACADEMY LEIDA SERGEANT SCHOOL
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