Dynamics of Articulated Aerospace Structures.

Abstract

A unified variational approach to dynamics of flexible multibody systems has been developed and demonstrated on several test problems, including a deployable space structure, flexible manipulators with feedback control, spinning blades, impacting elastic bodies, and variety of mechanisms. A new recursive formulation was developed for dynamics of flexible multibody systems. This new formulation demonstrated in excess of an order of magnitude speed up in computation, compared to the Cartesian coordinate approach, with comparable accuracy and improved stability. A substructuring formulation that accounts for geometrically nonlinear deformation effects in spinning blades and large space structures was developed and demonstrated, using both the Cartesian coordinate and recursive relative coordinate formulations. The substructure technique was further extended to account for contact-impact effects between structural components. A new formulation of translational joints between flexible bodies was developed, to account for deformation due to sliding contacts. Keywords: Articulated structures. (jhd)

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Document Details

Document Type
Technical Report
Publication Date
Apr 22, 1988
Accession Number
ADA195685

Entities

People

  • Edward J. Haug

Organizations

  • University of Iowa

Tags

Communities of Interest

  • Space

DTIC Thesaurus Topics

  • Availability
  • Cartesian Coordinates
  • Classification
  • Computational Complexity
  • Computer-Aided Design
  • Computers
  • Engineering
  • Equations
  • Equations Of Motion
  • Feedback
  • Large Space Structures
  • Manipulators
  • Mechanical Properties
  • Mechanics
  • Simulations
  • Sliding Contacts
  • Universities

Readers

  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)
  • Robotics and Automation.
  • Structural Dynamics.

Technology Areas

  • Space
  • Space - Spacecraft Maneuvers