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Microgravity vibration isolation technology: Development to demonstration

Grodsinsky, Carlos Mauricio
http://rave.ohiolink.edu/etdc/view?acc_num=case1057093710

Abstract Details

1993, Doctor of Philosophy, Case Western Reserve University, Aerospace Engineering.
The low gravity environment provided by space flight has afforded the science community a unique arena for the study of fundamental and technological sciences. However, the dynamic environment observed on space shuttle flights and predicted for Space Station Freedom has complicated the analysis of prior "microgravity" experiments and prompted concern for the viability of proposed space experiments requiring long term, low gravity environments. Thus, isolation systems capable of providing significant improvements to this random environment have been developed. This dissertation deals with the design constraints imposed by acceleration sensitive, "microgravity" experiment payloads in the unique environment of space. A theoretical background for the inertial feedback and feedforward isolation of a payload was developed giving the basis for two experimental active inertial isolation systems developed for the demonstration of these advanced active isolation techniques. A prototype six degree of freedom digital active isolation system was designed and developed for the ground based testing of an actively isolated payload in three horizontal degrees of freedom. A second functionally equivalent system was built for the multi-dimensional testing of an active inertial isolation system in a reduce d gravity environment during low gravity aircraft trajectories. These multi-input multi-output control systems are discussed in detail with estimates on acceleration noise floor performance as well as the actual performance acceleration data. The attenuation performance is also given for both systems demonstrating the advantages between inertial and non-inertial control of a payload for both the ground base environment and the low gravity aircraft acceleration environment. A future goal for this area of research is to validate the technical approaches developed to the 0.01 Hz regime by demonstrating a functional active inertial feedforward/feedback isolation system during orbital flight. A NASA IN-STEP flight experiment has been proposed to accomplish this goal, and the expected selection for the IN-STEP program has been set for July of 1993.
R. Quinn (Advisor)
273 p.
Microgravity vibration isolation technology development demonstration

Recommended Citations

Citations

  • Grodsinsky, C. M. (1993). Microgravity vibration isolation technology: Development to demonstration [Doctoral dissertation, Case Western Reserve University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=case1057093710

    APA Style (7th edition)

  • Grodsinsky, Carlos. Microgravity vibration isolation technology: Development to demonstration. 1993. Case Western Reserve University, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=case1057093710.

    MLA Style (8th edition)

  • Grodsinsky, Carlos. "Microgravity vibration isolation technology: Development to demonstration." Doctoral dissertation, Case Western Reserve University, 1993. http://rave.ohiolink.edu/etdc/view?acc_num=case1057093710

    Chicago Manual of Style (17th edition)

case1057093710
680
© 1993, all rights reserved.
This open access ETD is published by Case Western Reserve University School of Graduate Studies and OhioLINK.