Automated processing of trajectory data of system of registration based on general purpose cameras

Author(s):  E.M. Volotov, candidate of Sciences, Moscow Aviation Institute (National ResearchUniversity), branch «Vzlet» in Akhtubinsk, Akhtubinsk, Russia, volotovevgenii@gmail.com

S.V. Nesterov, candidate of Sciences, Moscow Aviation Institute (National ResearchUniversity), branch «Vzlet» in Akhtubinsk, Akhtubinsk, Russia

I.V. Mitrofanov, candidate of Sciences, Military unit 15650, Akhtubinsk-7, Russia

S.B. Kokorina, Military unit 15650, Akhtubinsk-7, Russia

E.I. Mitrofanov, Сlose corporation «Technological Park of Astronautics «Linkos», Moscow, Russia

Issue:  Volume 45, № 4

Rubric:  Infocommunication technologies

Annotation:  One of the priority directions of improvement of flight tests quality of aeronautical equipment and aircraft weapon is upgrading information support of tests. When conducting tests for measurements on the final trajectory of test items, the use of new mobile optical devices is required. These devices should provide automatic recording standby mode, be serviced by a small number of personnel and be quickly delivered and deployed in a given area. Today there is a large scale implementation of system of registration on the basis of traditional video cameras. Automated processing of trajectory data received from such systems is a relevant objective. The article describes the production line and the stages of processing of information recorded with the help of general purpose video cameras. Automated processing of trajectory data, regardless of the type of measuring tool used, the media, and the requirements of the processing task, is performed in four stages. The first stage is the preliminary processing of measurement data. This stage is the most labor intensive and less automated. Time and labor costs for solving the tasks of this stage make up 60% of the total costs of the information processing. The second stage is the preliminary data preparation. At this stage, the measurement data is prepared and reduced to a form suitable for processing programs. Time and labor costs at this stage are 4–10% of the total costs of the technological process. The third stage is data processing. At this stage, the data is processed in accordance with the program withrespectto the task. Time and labor costs at this stage range from 5 to 12% of all labor costs for processing and depend on the type of flight experiment. The fourth stage is the analysis of processing results. At this stage, the processing results are analyzed, formalized and sent the customer. The stage is not automated; all operations are performed manually and take up 18–20% of the total costs of the processing. To determine the trajectory parameters of a test item, the direction finding method based on the synchronous calculation of angular directions to the item based on the video information received from two video cameras is used. At the same time, algorithms for determining angular directions to reference points, calculating the focal length of video cameras, determining the position of the optical axes of video cameras and determining the rectangular coordinates of the item are implemented. The technological line for processing trajectory data includes application software which consists of: video processing software; programs for calculating the true angular directions to the item and its coordinates. The use of video of system of registration based on general purpose video cameras, as well as production lines of information processing recorded by such systems in flight tests, allows to obtain not only qualitative, but also quantitative assessments of the processes which the test item is subject to, which ultimately increases the level of information support of the test process

Keywords:  system of registration, technological lines of information processing, focal length, position of the optical axis, angular directions, rectangular coordinates

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