Absolute passive mode peculiarities and applications for LEO missions

Paper number

IAC-16,D1,IP,5,x35477

Author

Dr. Vladimir Ten, Ghalam LLP, Kazakhstan

Coauthor

Mr. Baubek Oralmagambetov, Ghalam LLP, Kazakhstan

Coauthor

Dr. Sergey Murushkin, Ghalam LLP, Kazakhstan

Coauthor

Mr. Arman Bekembayev, Ghalam LLP, Kazakhstan

Year

2016

Abstract

Some high priority factors may drive the design of the whole spacecraft in the early stages of development. One of these mission-driving factors is the safe mode configuration in terms of attitude, power and thermal state of the spacecraft. The simplest and most robust approach from the implementation point of view is the so-called passive safe mode where the spacecraft is left powered off in random tumble.

This paper analyzes power and thermal aspects of absolute passive safe mode i.e. spacecraft behavior in the absence of active or passive control (even without magnetic or gravitational stabilization). Analysis involves Monte-Carlo based approaches and provides universal patterns and rules discovered in the process.

The research takes advantage of using orbit and design data from two different missions KazEOSat-2 (launched in 2014) and KazSTSat (to be launched in 2017) for the analysis. 
Following mission characteristics and preconditions are taken into consideration: 

 - influence of orbit characteristics

 - spacecraft inertia properties

 - solar arrays structural allocation

The paper also provides an approach to find driving design cases from the simulation range.

Abstract document

IAC-16,D1,IP,5,x35477.brief.pdf

Manuscript document

IAC-16,D1,IP,5,x35477.pdf (🔒 authorized access only).

To get the manuscript, please contact IAF Secretariat.