Accession Number : ADA320235

Title :   Mechanics and Control of Nonlinear Structures.

Descriptive Note : Final Annual rept. 31 Aug 93-31 Jul 96,

Corporate Author : TEXAS A AND M UNIV COLLEGE STATION DEPT OF AEROSPACE ENGINEERING

Personal Author(s) : Junkins, John L.

PDF Url : ADA320235

Report Date : 22 NOV 1996

Pagination or Media Count : 337

Abstract : This report documents results of analytical, computational, and experimental research on nonlinear structural analysis. In particular, a novel inverse dynamics method is presented whereby exact solutions for nonlinear dynamical response can be determined near a given approximate numerical solution. This method is useful for validation and tuning of dynamic response simulations. Also, novel results are reported for parameterization of NxN proper orthogonal matrices and applications in mechanics and control are explored. A novel quasi-coordinate method is developed for nonlinear flexible multi-body structural systems having a configuration variable mass matrix. This approach avoids the necessity of inverting the mass matrix through the derivation of differential equations which generate an instantaneously diagonalizing transformation. Finally, experimental results of maneuvers of the ASTREX Test Article are presented.

Descriptors :   *ROBOTICS, *STRUCTURAL RESPONSE, ALGORITHMS, COMPUTERIZED SIMULATION, VIBRATION, OPTIMIZATION, MATRICES(MATHEMATICS), STRUCTURAL ANALYSIS, STRUCTURAL MECHANICS, DYNAMIC RESPONSE, NONLINEAR SYSTEMS, PARTIAL DIFFERENTIAL EQUATIONS, SYSTEMS ANALYSIS, NONLINEAR ANALYSIS, CONTROL THEORY, FLEXIBLE STRUCTURES.

Subject Categories : Cybernetics
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE