Multiple degree of freedom force-state component identification
Abstract
Force-state mapping is extended to allow the quasistatic characterization of realistic multiple degree of freedom systems whose constitutive relations are nonlinear, dissipative, coupled and depend on memory of past states. A general constitutive force-state 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 Kalman filter and a nonlinear least squares fit. A six degree of freedom force-state testing device was constructed, and used to obtain data on one bay of a simple truss and on one bay of the MODE deployable truss.
- Publication:
-
AIAA/ASME/ASCE/AHS/ASC 34th Structures, Structural Dynamics, and Materials Conference
- Pub Date:
- April 1993
- Bibcode:
- 1993ssdm.conf.3071M
- Keywords:
-
- Degrees Of Freedom;
- Kalman Filters;
- Least Squares Method;
- Linear Filters;
- Structural Analysis;
- Trusses;
- Calibrating;
- Constitutive Equations;
- Memory (Computers);
- Parameter Identification;
- Torsion;
- Transfer Functions;
- Transformations (Mathematics);
- Structural Mechanics