Accession Number:

ADA207874

Title:

Admittance Modeling of Structures with Active Controls

Descriptive Note:

Final rept. 1 Dec 1987-31 May 1988

Corporate Author:

CSA ENGINEERING INC PALO ALTO CA

Personal Author(s):

Report Date:

1988-05-31

Pagination or Media Count:

17.0

Abstract:

There are few methods available for analyzing structures or structures with controls that have high-modal densities andor unmodelable excitations these are essential characteristics of large space structures. Admittance models do not require that a structure be described in modal coordinates or that excitations be characterized as determinate functions of space. Methods have been developed for the analytical and experimental modeling of actuators and combining them with structural models. A scheme for optimal design of controller impedance using only measured admittance functions was derived and tested. The necessary elements for a hardware demonstration of the theory have been identified. A scheme for design and testing of a structure for verification of the equivalent excitation and structural modification equations has been developed. Large space structures, Control systems, Admittance models, Transient response, Random excitation, Unmanned spacecraft.

Subject Categories:

  • Unmanned Spacecraft

Distribution Statement:

APPROVED FOR PUBLIC RELEASE