Multiple degreeoffreedom forcestate component identification
Abstract
Forcestate mapping is extended to allow the quasistatic characterization of realistic multiple degreeoffreedom systems whose constitutive relations are nonlinear, dissipative, coupled, and depend on memory of past states. A general constitutive forcestate model is formulated, which includes dynamic hysteresis phenomena typical of that found in deployable structures. A two step parameter identification approach is developed, which employs a linear extended least squares and a nonlinear least squares fit. A six degreeoffreedom forcestate testing device was constructed and used to obtain data on one bay of a simple truss and on one bay of the middeck zerogravity dynamics experiment deployable truss.
 Publication:

AIAA Journal
 Pub Date:
 November 1994
 DOI:
 10.2514/3.12287
 Bibcode:
 1994AIAAJ..32.2276M
 Keywords:

 Degrees Of Freedom;
 Dynamic Response;
 Parameter Identification;
 Spacecraft Structures;
 Structural Analysis;
 Trusses;
 Hysteresis;
 Least Squares Method;
 Mathematical Models;
 Space Shuttle Payloads;
 Spaceborne Experiments;
 Weightlessness;
 Structural Mechanics