NDLI: Evaluation of actuators for the sdof and mdof active microgravity isolation systems

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Evaluation of actuators for the sdof and mdof active microgravity isolation systems

Content Provider	NASA Technical Reports Server (NTRS)
Copyright Year	1993
Description	The University of Virginia examined the design of actuators for both single-degree-of-freedom (SDOF) and multiple-degree-of-freedom (MDOF) active microgravity isolation systems. For SDOF systems, two actuators were considered: a special large gap magnetic actuator and a large stroke Lorentz actuator. The magnetic actuator was viewed to be of greater difficulty than the Lorentz actuator with little compelling technical advantage and was dropped from consideration. A Lorentz actuator was designed and built for the SDOF test rig using magnetic circuit and finite element analysis. The design and some experimental results are discussed. The University also examined the design of actuators for MDOF isolation systems. This includes design of an integrated 1 cm gap 6-DOF noncontacting magnetic suspension system and of a 'coarse' follower which permits the practical extension of magnetic suspension to large strokes. The proposed 'coarse' actuator was a closed kinematic chain manipulator known as a Stewart Platform. The integration of the two isolation systems together, the isolation tasks assigned to each, and possible control architectures were also explored. The results of this research are examined.
File Size	2286058
Page Count	46
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19930018406
Archival Resource Key	ark:/13960/t7rn82z6d
Language	English
Publisher Date	1993-05-01
Access Restriction	Open
Subject Keyword	Structural Mechanics Finite Element Method Actuators Degrees of Freedom Vibration Damping Vibration Isolators Manipulators Microgravity Magnetic Circuits Magnetic Suspension 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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