Analytical formulation of orbiter-payload models coupled by trunnion joints with Coulomb frictionAn orbiter and its payload substructure are linked together by five trunnion joints which have thirty degrees-of-freedom. Geometric compatibility conditions require fourteen of the interface physical coordinates of the orbiter and payload to be equal to each other and the remaining sixteen are free to have relative motions under Coulomb friction. The component modes synthesis method using fourteen inertia relief attachment modes for the formulation of the coupled system is presented. The exact nonlinear friction function is derived based on the characteristics of the joints. Formulation is applicable to an orbiter that carries any number of payload substructures.
Document ID
19870046433
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Liu, Frank C. (NASA Marshall Space Flight Center; Alabama, University Huntsville, United States)