Work

Semi-analytical attitude propagation of low-altitude Earth orbiting objects

Year: 2024

Type: article

Abstract: The paper introduces an averaged model suitable for studying the long-term attitude dynamics of low Earth orbit objects subject to the interaction with the exosphere. This work extends previous results by the authors on the development of a semi-analytical theory for long-term attitude propagation. The first-order averaged model is developed by expressing the rotational problem in modified Sadov variables and performing the average of the equations of motion over the fast Sadov angles and the orbital mean anomaly. A transformation from osculating to mean variables is also derived from a combination of Lie transformations. The approach proposed in this paper is applied to two possible atmospheric drag models: a simple, commonly used, model characterised by a constant dimensionless drag coefficient and a higher fidelity model based on the theory by Sentman (1961). • Semi-analytical theory for long term attitude propagation in Sadov variables. • Theory applicable to space objects with general shape and matrix of inertia. • Inclusion of mid-fidelity model for aerodynamic forces. • Derivation of accuracy maps.

Source: Communications in Nonlinear Science and Numerical Simulation

DOI: 10.1016/j.cnsns.2024.108550

Authors: I. Cavallari, J. Feng, M. Vasile

Institution: University of Strathclyde

Language: English

Topic: Spacecraft Dynamics and Control

Subfield: Aerospace Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,600

Funder: European Space Agency