Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/77310
Title: Post-capture vibration suppression of spacecraft via a bio-inspired isolation system
Authors: Dai, H 
Jing, X 
Wang, Y 
Yue, X
Yuan, J
Issue Date: 2018
Source: Mechanical systems and signal processing, 2018, v. 105, p. 214-240
Abstract: Inspired by the smooth motions of a running kangaroo, a bio-inspired quadrilateral shape (BIQS) structure is proposed to suppress the vibrations of a free-floating spacecraft subject to periodic or impulsive forces, which may be encountered during on-orbit servicing missions. In particular, the BIQS structure is installed between the satellite platform and the capture mechanism. The dynamical model of the BIQS isolation system, i.e. a BIQS structure connecting the platform and the capture mechanism at each side, is established by Lagrange's equations to simulate the post-capture dynamical responses. The BIQS system suffering an impulsive force is dealt with by means of a modified version of Lagrange's equations. Furthermore, the classical harmonic balance method is used to solve the nonlinear dynamical system subject to periodic forces, while for the case under impulsive forces the numerical integration method is adopted. Due to the weightless environment in space, the present BIQS system is essentially an under-constrained dynamical system with one of its natural frequencies being identical to zero. The effects of system parameters, such as the number of layers in BIQS, stiffness, assembly angle, rod length, damping coefficient, masses of satellite platform and capture mechanism, on the isolation performance of the present system are thoroughly investigated. In addition, comparisons between the isolation performances of the presently proposed BIQS isolator and the conventional spring-mass-damper (SMD) isolator are conducted to demonstrate the advantages of the present isolator. Numerical simulations show that the BIQS system has a much better performance than the SMD system under either periodic or impulsive forces. Overall, the present BIQS isolator offers a highly efficient passive way for vibration suppressions of free-floating spacecraft.
Keywords: Bio-inspired
Impulsive force
Nonlinear damping
On-orbit capture
Under-constrained system
Vibration isolation
Publisher: Academic Press
Journal: Mechanical systems and signal processing 
ISSN: 0888-3270
EISSN: 1096-1216
DOI: 10.1016/j.ymssp.2017.12.015
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