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Use of an Least Mean Squares Filter in the Control of Optical Beam Jitter

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Author
Watkins, R.
Agrawal, B.N.
Date
2007
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Abstract
Meeting optical beam jitter requirements is becoming a challenging problem for several space programs. A laser beam jitter control test bed has been developed at the Naval Postgraduate School to develop improved jitter control techniques. Several control techniques, such as least means squares and linear–quadratic regulator were applied for jitter control. Enhancement in least means squares techniques to improve convergence rate was achieved by adding an adaptive biasfilter to the reference signal. In the experiments, the platform is vibrated at 50 and 87 Hz. In addition, a fast steering mirror is used to inject a random component of 200 Hz band-limited white noise. The experimental results demonstrated that the addition of the adaptive bias filter to the least means squares algorithm significantly increased the converging rate of the controller. To achieve the reduction of both sinusoidal and random jitter, a combination of least means squares/adaptive bias filter and linear–quadratic regulator is most effective. The least means squares/adaptive bias filter control is most effective for a sinusoidal jitter and the linear–quadratic regulator control for a random jitter.
Description
The article of record as published may be found at http://dx.doi.org/10.2514/1.26778
Rights
This publication is a work of the U.S. Government as defined
in Title 17, United States Code, Section 101. As such, it is in the
public domain, and under the provisions of Title 17, United States
Code, Section 105, is not copyrighted in the U.S.
URI
http://hdl.handle.net/10945/34503
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  • Faculty and Researchers' Publications
  • Spacecraft Research and Design Center Publications

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    Optical Beam Jitter Control 

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  • Thumbnail

    The adaptive control of optical beam jitter 

    Watkins, R. Joseph (Monterey, California. Naval Postgraduate School, 2004-12);
    Acquisition, Tracking and Pointing (ATP) of space and airborne optical beams is becoming an important research topic as the requirements for the control of the beam is increasing. Arc-second accuracy and nano-radian jitter ...
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    Optical Beam Control Testbeds 

    Martinez, T.; Agrawal, B.N. (2008);
    This paper discusses two optical beam control testbeds developed at the Spacecraft Research and Design Center, Naval Postgraduate School, to evaluate and develop control techniques for jitter and adaptive optics control. ...
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