Modeling of the coupled nonlinear dynamics of booster vehicles, including flex modes, engines, and slosh
Abstract
The dynamics of large booster vehicles is characterized by the significant coupling between fuel slosh, engine gimballing, and vehicle rigid and flexural motion. This inherently makes the task of modeling booster vehicles a multi-flexible-body dynamics problem. There are many methods for formulating the equations of motion of a coupled nonlinear dynamical system. Many common methods require order(n-cubed) operations to evaluate the equations of motion, where n is the number of degrees-of-freedom of the coupled system. Recent developments in dynamics have made it possible to evaluate the equations of motion in order(n) operations. This makes it possible to write very efficient computer simulations of systems with many degrees of freedom. This paper presents a unified analysis of the coupled nonlinear dynamics of the rigid booster vehicle, flex modes, slosh masses, and engines. The formulation of the equations of motion is accomplished in order(n) operations.
- Publication:
-
AIAA, SAE, ASME, and ASEE, 26th Joint Propulsion Conference
- Pub Date:
- July 1990
- Bibcode:
- 1990jpof.confQ....P
- Keywords:
-
- Astrodynamics;
- Booster Rocket Engines;
- Flexible Bodies;
- Liquid Sloshing;
- Mathematical Models;
- Computerized Simulation;
- Degrees Of Freedom;
- Equations Of Motion;
- Fuel Tanks;
- Launch Vehicles and Space Vehicles