Dr. Suk-Min Moon Profile

Dr. Suk-Min Moon

at Adaptive Technologies Inc

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Publications (7)

Proceedings Article | 10 May 2007 Paper

Real-time optimal sensing strategies for active control of optical systems

Suk-Min Moon, Leslie Fowler, Robert Clark, Eric Anderson

Proceedings Volume 6569, 65690R (2007) https://doi.org/10.1117/12.719372

KEYWORDS: Sensors, Adaptive control, Digital signal processing, Actuators, Control systems, Detection and tracking algorithms, Optical components, Mirrors, Signal attenuation, Sensing systems

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The pointing and imaging performance of precision optical systems is degraded by disturbances on the system that create optical jitter. These disturbances can be caused by structural motion of optical components due to vibration sources that (1) originate within the optical system, (2) originate external to the system and are transmitted through the structural path in the environment, and (3) are air-induced vibrations from acoustic noise. Beam control systems can suppress optical jitter, and active control techniques can be used to extend performance by incorporating information from accelerometers, microphones, and other auxiliary sensors. In some applications, offline fixed gain controllers can be used to minimize jitter. However there are many applications in which a real-time adaptive control approach would yield improved optical performance. Often we would like the capability to adapt in real-time to a system which is time-varying or whose disturbances are non-stationary and hard to predict. In the presence of these harsh, ever-changing environments we would like to use every available tool to optimize performance. Improvements in control algorithms are important, but another potentially useful tool is a real-time adaptive control method employing optimal sensing strategies. In this approach, real-time updating of reference sensors is provided to minimize optical jitter. The technique selects an optimal subset of sensors to use as references from an array of possible sensor locations. The optimal, weighted reference sensor set is well correlated with the disturbance and when used with an adaptive control algorithm, results in improved line-of-sight jitter performance with less computational burden compared to a controller which uses multiple reference sensors. The proposed technique is applied to an experimental test bed in which multiple proof-mass actuators generate structural vibrations on a flexible plate. These vibrations are transmitted to an optical mirror mounted on the plate, resulting in optical jitter as measured by a position sensing detector. Accelerometers mounted on the plate are used to form the set of possible optimal reference sensors. Reduction of the structural vibration of optical components is attained using a fast steering mirror which results in a reduction of the corresponding jitter.

Proceedings Article | 19 May 2005 Paper

Optimal sensing strategy for adaptive control of optical systems

Suk-Min Moon, Leslie Fowler, Robert Clark

Proceedings Volume 5757, (2005) https://doi.org/10.1117/12.605544

KEYWORDS: Sensors, Actuators, Adaptive control, Optical components, Digital signal processing, Mirrors, Acoustics, Control systems, Detection and tracking algorithms, RGB color model

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Proceedings Article | 26 July 2004 Paper

Recursive generalized predictive control for systems with disturbance measurements

Suk-Min Moon, Robert Clark, Daniel Cole

Proceedings Volume 5383, (2004) https://doi.org/10.1117/12.538095

KEYWORDS: Control systems, System identification, Sensors, Acoustics, Data modeling, Systems modeling, Feedback control, Error analysis, Adaptive control, Mirrors

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Proceedings Article | 26 July 2004 Paper

Adaptive generalized predictive control combined with a least-squares lattice filter

Suk-Min Moon, Robert Clark, Daniel Cole

Proceedings Volume 5383, (2004) https://doi.org/10.1117/12.538493

KEYWORDS: Digital filtering, System identification, Acoustics, Filtering (signal processing), Control systems, Adaptive control, Algorithm development, Linear filtering, Systems modeling, Data modeling

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Proceedings Article | 1 August 2003 Paper

The online generalized predicitive control combined with a fast transversal filter

Suk-Min Moon, Robert Clark, Daniel Cole

Proceedings Volume 5049, (2003) https://doi.org/10.1117/12.484760

KEYWORDS: Picosecond phenomena, Information technology, Data modeling, Data conversion, System identification, Bismuth, Digital filtering, Control systems, Weapons of mass destruction, Neodymium

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Proceedings Article | 27 June 2002 Paper

Recursive methods for optical jitter suppression using acoustic actuators

Suk-Min Moon, Robert Clark

Proceedings Volume 4697, (2002) https://doi.org/10.1117/12.472656

KEYWORDS: Picosecond phenomena, Ferroelectric materials, Information technology, Control systems, System identification, Process control, Acoustics, Actuators, Smart materials, Weapons of mass destruction

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Proceedings Article | 2 July 2001 Paper

Advanced methods for optical jitter suppression using acoustic acutators

Suk-Min Moon, Robert Clark

Proceedings Volume 4331, (2001) https://doi.org/10.1117/12.432735

KEYWORDS: Sensors, Mirrors, Actuators, Acoustics, Feedback control, Optical components, Optical benches, Digital signal processing, Matrices, Control systems

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Showing 5 of 7 publications

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