Vibration Control of a Flexible Space Structure via Reduced Order Finite Element Modeling

Abstract

This study presents a hybrid modeling and control approach based on the integration of ANSYS and MATLAB for the active vibration control of flexible space structures. The structural dynamics were obtained through high-degree-of-freedom models via ANSYS APDL and transformed into a reduced-order state-space model (ROSSM) representing the rigid-flexible interaction for controller design. Performance analyses of the designed Pole Placement (PP) controller revealed that a damping ratio of 0.70 rapidly stabilizes oscillations under shock inputs; however, it was observed that this high damping performance significantly increases the control force requirements on the actuator. Sensitivity analyses conducted in the final stage of the study confirmed that the controller maintains its stability despite 10% variations in material properties, demonstrating a robust performance against parametric uncertainties.