Nonlinear model and attitude dynamics of flexible spacecraft with large amplitude slosh
| Autor: | Baozeng Yue, Mingle Deng |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Coupling
020301 aerospace & aeronautics Engineering Spacecraft Slosh dynamics business.industry Nutation Computation Aerospace Engineering 02 engineering and technology 01 natural sciences 010305 fluids & plasmas Physics::Fluid Dynamics Vibration Nonlinear system Amplitude 0203 mechanical engineering Control theory Physics::Space Physics 0103 physical sciences business |
| Zdroj: | Acta Astronautica. 133:111-120 |
| ISSN: | 0094-5765 |
| DOI: | 10.1016/j.actaastro.2017.01.003 |
| Popis: | This paper is focused on the nonlinearly modelling and attitude dynamics of spacecraft coupled with large amplitude liquid sloshing dynamics and flexible appendage vibration. The large amplitude fuel slosh dynamics is included by using an improved moving pulsating ball model. The moving pulsating ball model is an equivalent mechanical model that is capable of imitating the whole liquid reorientation process. A modification is introduced in the capillary force computation in order to more precisely estimate the settling location of liquid in microgravity or zero-g environment. The flexible appendage is modelled as a three dimensional Bernoulli-Euler beam and the assumed modal method is employed to derive the nonlinear mechanical model for the overall coupled system of liquid filled spacecraft with appendage. The attitude maneuver is implemented by the momentum transfer technique, and a feedback controller is designed. The simulation results show that the liquid sloshing can always result in nutation behavior, but the effect of flexible deformation of appendage depends on the amplitude and direction of attitude maneuver performed by spacecraft. Moreover, it is found that the liquid sloshing and the vibration of flexible appendage are coupled with each other, and the coupling becomes more significant with more rapid motion of spacecraft. This study reveals that the appendage's flexibility has influence on the liquid's location and settling time in microgravity. The presented nonlinear system model can provide an important reference for the overall design of the modern spacecraft composed of rigid platform, liquid filled tank and flexible appendage. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect