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Optical pathlength control experiment on JPL phase B testbedAn 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 with 6 nanometer rms under the laboratory ambient disturbance and within 9 nanometer rms under a severe forced resonant disturbance.
Document ID
19930050208
Document Type
Conference Paper
Authors
Rahman, Zahidul H. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Spanos, John T. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
O'Brien, John (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Chu, Chengchin (JPL Pasadena, CA, United States)
Date Acquired
August 16, 2013
Publication Date
January 1, 1993
Publication Information
Publication: In: AIAA(ASME)ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, 34th and AIAA/ASME Adaptive Structures Forum, La Jolla, CA, Apr. 19-22, 1993, Technical Papers. Pt. 6 (A93-33876 1
Subject Category
SPACECRAFT DESIGN, TESTING AND PERFORMANCE
Report/Patent Number
AIAA PAPER 93-1695
Distribution Limits
Public
Copyright
Other

Related Records

IDRelationTitle19930049879Analytic PrimaryAIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, 34th and AIAA/ASME Adaptive Structures Forum, La Jolla, CA, Apr. 19-22, 1993, Technical Papers. Pts. 1-6