Semi-active friction tendons for vibration control of space structures

GARRIDO HERNÁN; CURADELLI, OSCAR; AMBROSINI, DANIEL

JOURNAL OF SOUND AND VIBRATION

ACADEMIC PRESS LTD-ELSEVIER SCIENCE LTD

Lugar: Amsterdam; Año: 2014 vol. 333 p. 5657 - 5679

0022-460X

Semi-active vibration control systems are becoming popular because they oer both the reliability of passive systemsand the versatility of active control without high power demands. In this work, a new semi-active control system isproposed and studied numerically. The system consists of variable-friction dampers linked to the structure throughcables. Auxiliary soft springs in parallel with these friction dampers allow them to return to their initial pre-tensionedstate. Using cables makes the system suitable for deployable, flexible and lightweight structures, such as space structures(spacecraft). A control system with three control laws applied to a single-degree-of-freedom structure is studied.Two of these laws are derived by using Lyapunov theory, whereas the third one is developed heuristically. In orderto assess the performance of the control system, a parametric study is carried out through numerical simulations. Anapplication of the proposed method to multi-degree-of-freedom structures is also presented and demonstrated througha numerical example. The system in semi-active mode is more eective than in passive mode and its eectiveness isless sensitive to loss of pre-tension.