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Target combined positioning method based on Euler's distance means clustering

A technology of mean clustering and Euclidean distance, applied in radio wave measurement systems, instruments, etc., can solve problems such as abnormal positioning results, and achieve the effect of simple calculation model form

Inactive Publication Date: 2015-09-09
CHINA XIAN SATELLITE CONTROL CENT
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Problems solved by technology

In the past, the least squares estimation method was often used, but in the process of data processing, ill-conditioned matrices were often encountered, resulting in abnormal positioning results

Method used

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  • Target combined positioning method based on Euler's distance means clustering
  • Target combined positioning method based on Euler's distance means clustering
  • Target combined positioning method based on Euler's distance means clustering

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Embodiment Construction

[0014] The present invention will be further described below in conjunction with the examples, and the present invention includes but not limited to the following examples.

[0015] The present invention adopts certain K radar devices in the same arc section to track the target. Use the measurement data of these K tracking devices to complete the determination of the positioning results of the launch vehicle.

[0016] The specific process is as follows:

[0017] 1. Calculate the position parameters of the target in the launch coordinate system

[0018] At time k, it is assumed that the observations measured by each radar and corrected by various systematic errors are (slant distance R i , Azimuth A i , pitch angle E i ), the transformation matrix from the station coordinate system to the emission coordinate system is T i , the coordinate vector of the station in the emission coordinate system is (x 0i ,y 0i ,z 0i ), the position parameter of the target in the launch co...

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Abstract

The invention provides a target combined positioning method based on Euler's distance means clustering, wherein the method comprises the steps of obtaining the position parameter of a target in a transmission coordinate system from observation data of each radar, obtaining the estimated amount of a target position parameter according to a simple track fusion method, calculating the Euler's distance between the positioning result of a single radar and a means clustering center, optimally determining the similarity among target position parameters by means of a fuzzy means clustering algorithm, fusing target position parameters according to a corresponding membership grade, and obtaining a target position parameter after fusion. The target combined positioning method has a simple computing model form and furthermore can effectively determine the spatial position of a flying target.

Description

technical field [0001] The invention belongs to the field of aerospace measurement and control, and relates to a target joint positioning method. Background technique [0002] In the flight experiment mission, in order to obtain the parameters of the outer ballistic experiment, the motion parameters such as the position and speed of the target flight must be obtained through optical or radio measurement means during the flight of the target. According to different measurement requirements and different target motion characteristics, different measurement methods and measurement systems are used for the measurement of external ballistic parameters. Pulse radar is one of the main devices of the radio external measurement system. It mainly measures the azimuth, elevation angle and slant distance of the target, and uses these measurement elements to obtain the external trajectory parameters through complex mathematical operations. In the process of tracking measurement, in orde...

Claims

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Application Information

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IPC IPC(8): G01S7/41
CPCG01S7/41
Inventor 柴敏宋卫红王敏陈宁胡绍林王家松李永华
Owner CHINA XIAN SATELLITE CONTROL CENT
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