Accession Number:

ADA250193

Title:

Studies in Control for Vibration Suppression of the UWAA 20-Bay Planar Truss

Descriptive Note:

Master's thesis

Corporate Author:

AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH

Personal Author(s):

Report Date:

1991-01-01

Pagination or Media Count:

109.0

Abstract:

This thesis is based on research conducted at the newly constructed Aeronautics and Astronautics Control Sciences Laboratory at the University of Washington. The set up of the UWAA 20-bay planar truss is described, and is based upon a simular experimental test bed at the United States Air Force Academy. Validation of existing open loop finite element models of the truss in the cantilevered configuration was conducted for this research. The formulation of non-linear and approximate linear models for the two primary means of structurally-borne actuation, the air jet thrusters and the reaction mass actuators, is also explored. Computer non-linear simulation and experimental testing of classical analog controllers to actively suppress vibration of the planar bending modes of the truss using the air jet thruster and reaction mass actuators independently and jointly for hybrid linearnon-linear actuation is reported in this thesis. The design of an optimal controller for the reaction mass actuators utilizing linear quadratic Gaussian techniques is reported, and includes non-linear simulation of hybrid actuation utilizing the optimal reaction mass actuator controllers and the classical air jet thruster controllers. Recommendations for future study based upon both the hardware implementation and the computer simulation are suggested in the conclusions section of this thesis.

Subject Categories:

  • Structural Engineering and Building Technology
  • Jet and Gas Turbine Engines
  • Unmanned Spacecraft
  • Manned Spacecraft

Distribution Statement:

APPROVED FOR PUBLIC RELEASE