Derivation of line-of-sight stabilization equations for gimbaled-mirror optical systems

DeBruin, James C.

doi:10.1117/12.51185

Cited by 9 publications

(4 citation statements)

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“…According to Snell's Law, the transformation of the incident vector Pi to the reflected vector Po by the mirror can be represented by the Equation (3) [17][18][19]:…”

Section: Analysis Of Coordinate Transformationmentioning

confidence: 99%

Line of Sight and Image Motion Compensation for Step and Stare Imaging System

Xiu

Huang

et al. 2020

Applied Sciences

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In recent years, applications such as marine search and rescue, border patrol, etc. require electro-optical equipment to have both high resolution and precise geographic positioning abilities. The step and stare working based on a composite control system is a preferred solution. This paper proposed a step and stare system composed of two single-axis fast steering mirrors and a two-axis gimbal. The fast steering mirrors (FSMs) realize image motion compensation and the gimbal completes pointing control. The working principle and the working mode of the system are described first. According to the imaging optical path, the algorithm and control flow of the line of sight (LOS) and image motion compensation are developed. The proposed method is verified through ground imaging and flight tests. Under the condition of flight, the pointing accuracy of the target can be controlled within 15 m. The proposed algorithm can achieve effective motion compensation and get high-resolution images. This achieves high resolution and accurate LOS simultaneously.

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“…According to Snell's Law, the transformation of the incident vector Pi to the reflected vector Po by the mirror can be represented by the Equation (3) [17][18][19]:…”

Section: Analysis Of Coordinate Transformationmentioning

confidence: 99%

Line of Sight and Image Motion Compensation for Step and Stare Imaging System

Xiu

Huang

et al. 2020

Applied Sciences

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“…At present, the antenna stabilization methods based on gyro stabilization are chiefly divided into [2][3][4][5][6][7][8] (1) Procession Gyros the stabilized apparatus and sensors are mounted on procession gyros which use angle momentum to implement line-of-sight (LOS) stabilization. The servo system uses the error signals to drive gyros moving toward targets direction when in searching or tracking operation.…”

Section: Antenna Stabilization Platformsmentioning

confidence: 99%

Study on antenna beam tilting for flat SOTM on vehicle

Mao

Lin

2008

2008 Asia Simulation Conference - 7th International Conference on System Simulation and Scientific Computing

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This paper is based on the direction of low profile and miniaturization for SOTM on vehicle, the performance of beam tilting technique is studied and analyzed according to flat antenna structure, and the performance of insulating vehicle attitude changes is simulated based on angular position compensation, the results indicate that the flat SOTM applying beam tilting technique could reduce height effectively while adds some burden on hardware of azimuth, elevation and polarization compensation. The technique applied and results obtained are instructive for engineering.

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“…A superscript k is added to all these quantities as needed to associate them with a particular component k. Using this notation, Eq. 2 becomes: cj=- (3) Note that the phrase "about or along axis j" allows the influence coefficient definition to be applied to either rotational or translation component disturbances. Beyond the general definitions presented in this and the next section, however, the primary focus of this paper is on rotational disturbances of the entire optical system and its plane-mirror elements.…”

Section: Definition Of An Influence Coefficientmentioning

confidence: 99%

<title>Derivation of structural influence coefficients for plane-mirror optical systems</title>

DeBruin

Johnson

1994

Acquisition, Tracking, and Pointing VIII

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Movement of an optical element from its nominal mounting position can result in shifts in the pointing direction and image orientation of an optical system . This movement can be ei ther stat ic (due to mount ing misal ignment ) , or dynamic (due to structural vibration) . The structural influence coefficients map the translational and rotational motions of lenses, mirrors, prisms, and detectors to changes in line-of-sight direction and image orientation.Influence coefficients are used by the structural dynamicist to predict image jitter from structural finite-element models and by the mechanical designer to tolerance the element-support structure. A method for calculating the influence coefficients for plane-mirror systems is presented. The method includes a working definition of an influence coefficient, a general process for coefficient extraction, and an algorithmic approach to numerical calculations. The method described allows ready calculation of influence coefficients without tedious ray-trace perturbations or dedicated optical analysis software.

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Derivation of line-of-sight stabilization equations for gimbaled-mirror optical systems

Cited by 9 publications

References 0 publications

Line of Sight and Image Motion Compensation for Step and Stare Imaging System

Line of Sight and Image Motion Compensation for Step and Stare Imaging System

Study on antenna beam tilting for flat SOTM on vehicle

<title>Derivation of structural influence coefficients for plane-mirror optical systems</title>

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