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The Key Technology Research of the Panoramic Aerial Camera Dynamic Resolution Detection System

Author: BaiXueMei
Tutor: AnZhiYong
School: Changchun University of Science and Technology
Course: Optical Engineering
Keywords: Panoramic aerial camera Dynamic resolution detection Infinity dynamic target Uniform linear motion Fuzzy RBF Neural Network
CLC: P231
Type: PhD thesis
Year: 2009
Downloads: 333
Quote: 1
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Abstract


Panoramic aerial camera is mounted in the aircraft on the ground photographic precision optical instruments, is an important device reconnaissance carrier. Panoramic aerial camera performance detection system, the dynamic resolution detection is very important. Dynamic resolution is an important basis for image quality measure camera to take pictures in the random flight process or when taking pictures of moving objects. This paper, dynamic resolution panoramic aerial camera detection system and the key technologies involved in specific research. The papers in the panoramic aerial camera imaging principle on the basis of a detailed analysis of the proposed dynamic resolution detection of overall program. The detection system consists of the infinity dynamic target system, stable platform for its mechanical, electrical control system structure. Infinity dynamic shooting target placed in the camera scan within three different angles infinity dynamic target event of a system camera; stable platform system provides aircraft attitude movement and forward movement of the working environment, to mimic the aerial camera in the aircraft in which the various postures. The entire system related to key technologies including infinity dynamic target technology, linear motion control technology and stable platform control technology. Paper, infinity dynamic target system build, design a large field of view collimator (focal length 1000mm, depending on the angle of 5 °), foot-shaped resolution board (JB / T 9328-1999 standard pattern replication stitching production ), and the linear motion device. Camera exposure time of the camera, the foot-shaped resolution plate movement to the collimator field of view, to simulate infinity dynamic target. Infinity dynamic target of infinity dynamic target speed uniformity and uniform segment higher speed coverage (50mm / s ~~ 1500mm / s). In response, in this paper, a straight-line the uniform motion control algorithm, the repetitive control algorithm the nonlinear PID algorithm, friction feed forward compensation algorithm and torque feedforward compensation algorithm for composite, and the composite control algorithm transplant to a programmable multi-axis Motion Controller (PMAC), and the uniform segment reached 300mm, instantaneous speed error is less than 1.5 mm / s. Paper, the angular position of the Euler angles describe the mathematical model of the three-axis stabilized platform, and analyzed the the aircraft attitude error image motion compensation. Come to meet the engineering applications, dual-axis stabilized platform can be used to be the realization conclusions. In the control system, a Bayesian probability is introduced into the fuzzy RBF neural network to enhance the reasoning ability of the system to improve the aircraft analog servo precision of each fairway position. As can be seen from the simulation results, stable platform for tracking error is less than ± 0.005 °. The resolution detection theory applied to the dynamic resolution panoramic aerial camera detection system, through infinity dynamic target event of a system, the system of linear motion systems and stable platform design and realization of complete dynamic resolution detection, as provide an important basis for measuring image quality of panoramic aerial camera.

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CLC: > Astronomy,Earth Sciences > Surveying and Mapping > Photogrammetry and Surveying, Mapping and Remote Sensing > Aerial Photogrammetry
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