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External trajectory optical measurement precision analysis method based on virtual platform

A precision analysis and optical measurement technology, applied in image analysis, image data processing, animation production, etc., can solve the problems of high manpower and material resources consumption, low flight speed of drones, and the influence of uncontrollable factors on the accuracy of precision analysis. Achieve low-cost, easy-to-achieve effects

Pending Publication Date: 2021-04-02
BEIJING RES INST OF TELEMETRY +1
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Problems solved by technology

[0011] Due to the low flying speed of the UAV, it is especially difficult to compare with the extremely high flying speed of the missile re-entry stage, so this method is only suitable for the measurement accuracy analysis of the low-speed target ballistic parameters
In addition, the field test needs to consume a lot of manpower and material resources, and the accuracy of precision analysis is easily affected by uncontrollable factors such as on-site atmospheric visibility and weather

Method used

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  • External trajectory optical measurement precision analysis method based on virtual platform
  • External trajectory optical measurement precision analysis method based on virtual platform
  • External trajectory optical measurement precision analysis method based on virtual platform

Examples

Experimental program
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Embodiment 1

[0041] like figure 1 As shown, a method for analyzing the accuracy of external ballistic optical measurement based on a virtual platform includes the following steps:

[0042] S1. Three-dimensional modeling: use 3ds Max software to carry out three-dimensional modeling of the topography of the shooting range and the measured flight target;

[0043] like image 3 As shown, the model is the desert Gobi landform, the tested flight target is the US-made AGM-65B air-to-ground tactical missile, and the attack target is the barracks. The 3D model is created in a 1:1 ratio;

[0044] S2. Build a virtual external ballistic optical measurement device: use the camera in the 3ds Max software to simulate the external ballistic optical measurement device in reality, and set the camera parameter α; the camera parameter α includes the geographic coordinates of the camera in the three-dimensional model, the camera azimuth angle and Pitch angle, camera image sensor size and resolution, camera ...

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Abstract

The invention provides an external trajectory optical measurement precision analysis method based on a virtual platform. The method comprises the following steps: S1, three-dimensional modeling; s2, constructing virtual outer ballistic trajectory optical measurement equipment; s3, generating a target three-dimensional flight animation; s4, outputting a two-dimensional image sequence; s5, setting an error term; s6, performing image processing and parameter calculation; s7, measurement precision analysis. According to the virtual platform-based external ballistic optical measurement precision analysis method, precision analysis can be performed on an image processing software algorithm, and the precision analysis capability of optical measurement equipment from hardware to a software algorithm whole system is achieved; the method can analyze the measurement precision of dynamic outer trajectory parameters related to target motion, such as flight speed and attack angle, and has the capability of analyzing the static and dynamic full-parameter measurement precision of the outer trajectory.

Description

technical field [0001] The invention relates to the technical field of external ballistic optical measurement, in particular to a method for measuring the accuracy of external ballistic optical measurement based on a virtual platform. Background technique [0002] External ballistic optical measurement refers to the acquisition of flying target images by the principle of optical imaging, and the processing of external ballistic parameters such as ballistic trajectory, flight speed, flight attitude (pitch angle, yaw angle and roll angle), and attack angle, etc. Complete the trajectory measurement of the initial stage of the target flight and the low-altitude reentry stage. It has the advantages of high measurement accuracy, strong intuition (can record target images), and is not subject to interference from "black barriers" and ground clutter. It can provide accurate flight trajectory parameters for the evaluation, design, improvement and finalization of weapons for the tech...

Claims

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Application Information

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IPC IPC(8): G06T7/00G06T7/13G06T7/20G06T13/20
CPCG06T7/0002G06T7/13G06T7/20G06T13/20G06T2207/10028G06T2207/30241Y02T90/00
Inventor 李庆丰王伟魁聂新建彭泳卿冯红亮
Owner BEIJING RES INST OF TELEMETRY
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