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Title: Optical Pathlength Control Experiment on JPL Phase B Testbed
Authors: Rahman, Z.
Spanos, J.
O'Brien, J.
Chu, C.
Issue Date: 19-Apr-1993
Citation: La Jolla, California, USA
Abstract: An experimental implementation of a nanometer level optical pathlength control for large baseline space interferometry is presented. The pathlength compensation system is installed on a large flexible experimental truss, thus structural motions play a dominant role in the control system design. The associated control structure interaction problem is addressed to maintain the optical pathlength within the prescribed variation of 10-15 nanometer rms. By a successful blend of a structural control for damping augmentation and a direct pathlength control for the pathlength compensation, the optical pathlength variation has been maintained within 6 nonometer rms under the laboratory ambient disturbance and within 9 nonmeter rms under a severe forced resonant disturbance.
Appears in Collections:JPL TRS 1992+

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