Optimal Sensor/Actuator Placement on a Large Space Structure.

Abstract

The method of eliminating observation and control spillover is studied by making groups of reduced order controlled modes orthogonal to each other. These modes are the rows and columns of the system matrices which are calculated from the direction cosine matrix and the eigenvector matrix. The direction cosine matrix is determined from the locations and orientations of the sensor/actuators. The eigenvector matrix is determined from the NASTRAN finite element model of large space structure. The decentralized controller can be made stable if the placement of the sensors/actuators cause the spillover to be eliminated. The program ANGLE is developed to calculate the angles between modes. After selecting a possible grouping of modes, problems angles are identified for improvement. These angles are then improved using the ORIENT program by manipulating the sensor/actuator placement model. Finally, the finite element model is changed to see its effect on the angles between the modes. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1984
Accession Number
ADA144560

Entities

People

  • R. R. Luter

Organizations

  • Air Force Institute of Technology

Tags

Communities of Interest

  • Energy and Power Technologies
  • Sensors

DTIC Thesaurus Topics

  • Actuators
  • Air Force
  • Computational Science
  • Computer Programs
  • Control Systems
  • Eigenvalues
  • Eigenvectors
  • Engineering
  • Equations
  • Finite Element Analysis
  • Frequency
  • Large Space Structures
  • Mechanics
  • Orientation (Direction)
  • Resonant Frequency
  • Three Dimensional
  • United States

Readers

  • Adaptive Control and Estimation with Uncertainty in Dynamic Systems.
  • Robotics and Automation.
  • Structural Dynamics.

Technology Areas

  • Space
  • Space - Spacecraft Maneuvers