NDLI: Microgravity isolation system design: a case study

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Microgravity isolation system design: a case study

Content Provider	NASA Technical Reports Server (NTRS)
Author	Hampton, R. D. Allaire, P. E. Grodsinsky, C. M. Knospe, C. R.
Copyright Year	1994
Description	Many acceleration-sensitive, microgravity science experiments will require active vibration isolation from manned orbiters on which they will be mounted. The isolation problem, especially in the case of a tethered payload, is a complex three-dimensional one that is best suited to modern-control design methods. In this paper, extended H(sub 2) synthesis is used to design an active isolator (i.e., controller) for a realistic single-input-multiple-output (SIMO) microgravity vibration isolation problem. Complex mu-analysis methods are used to analyze the isolation system with respect to sensor, actuator, and umbilical uncertainties. The paper fully discusses the design process employed and the insights gained. This design case study provides a practical approach for isolation problems of greater complexity. Issues addressed include a physically intuitive state-space description of the system, disturbance and noise filters, filters for frequency weighting, and uncertainty models. The controlled system satisfies all the performance specifications and is robust with respect to model uncertainties.
File Size	940321
Page Count	24
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19950011242
Archival Resource Key	ark:/13960/t9p31t56z
Language	English
Publisher Date	1994-12-01
Access Restriction	Open
Subject Keyword	Aeronautics (general) Controllers Robustness Mathematics Control Systems Design Vibration Isolators Optimal Control Feedback Control Microgravity Active Control Tethered Satellites Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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