Accession Number : ADA330608

Title :   Characterization of Joint Nonlinear Stiffness and Damping Behavior for Inverse Dynamics of Flexible Articulated Structures.

Descriptive Note : Final technical rept. 15 Aug 93-14 Aug 96,

Corporate Author : CALIFORNIA UNIV SANTA BARBARA DEPT OF MECHANICAL AND ENVIRONMENTAL ENGINEERING

Personal Author(s) : Paden, Brad ; Trautt, Thomas A.

PDF Url : ADA330608

Report Date : 14 AUG 1996

Pagination or Media Count : 10

Abstract : An inverse dynamics algorithm is derived for active vibration quenching of structures. The algorithm uses frequency domain techniques to compute an input function needed to produce a desired response at a particular degree of freedom. The desired response is a transition from the initial vibrating condition to a non-vibration condition. The algorithm can also be used to modify the input function to correct for system disturbances while the input function is already being applied to the system. The algorithm is demonstrated in a simulation of a simply supported beam controlled by a torque actuator at one end of the beam. The finite element method is used to discretized the equations of motion of the beam.

Descriptors :   *VIBRATION, *DAMPING, ALGORITHMS, EQUATIONS OF MOTION, PHASE TRANSFORMATIONS, FINITE ELEMENT ANALYSIS, BEAMS(STRUCTURAL), QUENCHING, NONLINEAR SYSTEMS, INVERSION, FREQUENCY DOMAIN, TORQUE, DISCRETE FOURIER TRANSFORMS.

Subject Categories : Numerical Mathematics
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE