Abstract
The motion of the aerodynamic tether system includes two stages - the deployment and the motion of the deployed system. The initial condition for the deployment model is that of a spacecraft with a rigidly connected second body in a circular orbit about the planet. The deployment process is based on the aerodynamic forces acting on bodies. After the separation of the rigid connection, further motions of the bodies are then controlled by the tether release mechanism which unreels the tether and controls the rate at which the tether is unreeled. The motion of the system is described by the multi-point model, splitting the tether into a number of parts and using the series of separations of material points from the spacecraft, thus forming a mathematical model of the system with distributed parameters. The aerodynamic forces acting on the tether are taken into consideration. This model makes it possible to calculate numerically elastic deformations and curvature of the tether and provides more accurate modelling if compared with the two-point model.
Highlights
The aerodynamic space tether system is a system of two rigid bodies connected by a long thin stretchable tether where the aerodynamic forces has a major influence on the motion of the system
The multi-point modelling predicts angles having slightly smaller values than calculated using the two-point model because the aerodynamic forces acting on the tether are included in the model
The aerodynamic forces acting on the tether have a stabilizing effect
Summary
The aerodynamic space tether system is a system of two rigid bodies connected by a long thin stretchable tether where the aerodynamic forces has a major influence on the motion of the system. The orientation, or attitude, is the part of the description of the placement that the rigid body occupies in space. The other component of placement is its linear position. The attitude is defined by the angles between the longitudinal axis of the spacecraft and some reference line or plane [1] such as the vector of velocity of the air flow. Stabilization means the process of maintaining attitude during motion or tending to restore the original attitude after receiving a displacement or perturbation. Attitude control is the process of achieving and maintaining a desired orientation in space by a corrective action
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