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Double-observer cooperative passive positioning method and system

A technology of passive positioning and observation, applied in the direction of radio wave measurement systems, positioning, measuring devices, etc., can solve problems such as being easy to be found, achieve strong stability and adaptability, ensure passive positioning accuracy, and prevent target models from being inaccurate The effect of matching problems

Active Publication Date: 2020-04-14
北京壹氢科技有限公司
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Problems solved by technology

However, due to its active emission of high-power signals, it also brings defects, that is, it is easier to be discovered, thus causing incalculable consequences

Method used

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  • Double-observer cooperative passive positioning method and system
  • Double-observer cooperative passive positioning method and system
  • Double-observer cooperative passive positioning method and system

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Experimental program
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Embodiment

[0058] The overall flowchart of the algorithm is as follows: figure 1 shown. The system sequence diagram is as follows figure 2 shown.

[0059] The specific process includes the following steps:

[0060] Step 1: Each observer uses the IMM algorithm + CKF (Cubature Kalman filter, volumetric Kalman filter) according to the target information sensitive to its own sensor (the relative angle between the observer and the target (pitch angle and azimuth angle)). The algorithm performs target tracking estimation independently, obtains the target tracking estimation result of the platform, and converts the target tracking result into information form.

[0061] For the convenience of the following introduction, two observers are defined as observer a and observer b. This part mainly introduces "IMM algorithm + CKF algorithm". The calculation flow chart of this algorithm is as follows image 3 shown, refer to image 3 , the specific calculation process of the algorithm is as follow...

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Abstract

The invention discloses a double-observer cooperative passive positioning method and system. The method comprises the steps of acquiring filtering information of a model selected at the previous moment and the observed quantity of an observer at the current moment ; determining the mixing probability of the model selected at the previous moment according to the mutual transition probability of theselected model and the probability that the model selected at the previous moment correctly describes the target motion; calculating a filtering information initial value according to the mixing probability of the model selected at the previous moment and the filtering information of the model selected at the previous moment, wherein the filtering information initial value comprises a filtering estimation result initial value and a filtering estimation error covariance initial matrix; respectively calculating a target passive tracking and positioning result of each observer at the current moment; and performing weighted fusion processing according to the target passive tracking and positioning result of each observer at the current moment to obtain a fused target tracking and positioningresult. The method and the system have the advantages that the positioning time can be shortened while the positioning precision is improved.

Description

technical field [0001] The invention relates to the technical field of target tracking and positioning, in particular to a dual-observer cooperative passive positioning method and system. Background technique [0002] Radiation source location is an important part of electronic countermeasures and reconnaissance. The elimination and destruction of targets depends on the precise positioning of threatening targets. The radiation source location method is divided into active location and passive location according to whether the location terminal actively transmits signals. The positioning method of active positioning is to locate the target through the positioning terminal actively emitting signals such as sonar, laser and radar. The advantage of this method is that it can work 24 hours a day without interruption and has high positioning accuracy. However, due to its active transmission of high-power signals, it also has defects, that is, it is easier to be found, thus causin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/18G01S5/08G06F30/20
CPCG06F17/18G01S5/08
Inventor 梁源徐兵
Owner 北京壹氢科技有限公司
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