Advanced methods for optical jitter suppression using acoustic acutators

Suk-Min Moon; Robert L. Clark

doi:10.1117/12.432735

2 July 2001 Advanced methods for optical jitter suppression using acoustic acutators

Suk-Min Moon, Robert L. Clark

Proceedings Volume 4331, Smart Structures and Materials 2001: Damping and Isolation; (2001) https://doi.org/10.1117/12.432735
Event: SPIE's 8th Annual International Symposium on Smart Structures and Materials, 2001, Newport Beach, CA, United States

Abstract

The objective of the research is to investigate an effective method of using servo control through the use of a fast steering mirror and/or acoustic actuators and sensors for optical jitter suppression. The experimental testbed is built in an anechoic chamber at Duke University. Two optical benches are used to isolate metrology components from vibrating optical elements. A Helium-Neon laser and a position sensor are mounted on one optical bench and a turning flat mirror and a 3-axis fast steering mirror are on the other optical bench. External acoustic disturbances from the speaker are used to generate vibration in the optical components. A speaker housed within an enclosure and a fast steering mirror are the two allowable control actuators and external microphones are used for reference measurement, microphones/accelerometers mounted on or nearby the optical elements and the optical sensor are the three allowable control sensors in the experiment. The generalized predictive controller is used to conjugate the process of the system identification algorithm and the process of the controller design, and can be updated adaptively in the changes of the operating environment. The generalized predictive controllers are designed for each actuator and each sensor: Case 1) Fast steering mirror and position detector, Case 2) Control speaker and position detector, Case 3) Fast steering mirror and external microphones. The generalized predictive controller for all control actuators and sensors is also designed.

Citation Download Citation

Suk-Min Moon and Robert L. Clark "Advanced methods for optical jitter suppression using acoustic acutators", Proc. SPIE 4331, Smart Structures and Materials 2001: Damping and Isolation, (2 July 2001); https://doi.org/10.1117/12.432735

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KEYWORDS

Sensors

Mirrors

Actuators

Acoustics

Feedback control

Optical components

Optical benches

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