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9 results on '"Steyn, Willem Herman"'

2. Gyro-Control of a Solar Sailing Satellite

Author

Jordaan, Hendrik Willem and Steyn, Willem Herman

Subjects
Physics - Space Physics, Astrophysics - Earth and Planetary Astrophysics, Astrophysics - Instrumentation and Methods for Astrophysics, Electrical Engineering and Systems Science - Systems and Control
Abstract

Recent successes in the deployment of sails in space have reduced the risk associated with solar sailing missions. The attitude control requirements for a solar sailing mission is low with only slow attitude maneuvers needed to maintain a stable attitude and produce a required solar thrust. Future science missions will require large attitude maneuvers with a fully deployed sail. This article investigates the current options for attitude control on solar sails and proposes a gyro-controlled solar sailing. This concept uses a spinning solar sail to construct a control moment gyroscope capable to produce large torques. Steering laws for performing attitude maneuvers and simulation results are presented which demonstrates the capabilities of such a solution.

Published
2019

7. The Development of 'nSight-1' - Earth Observation and Science in 2U

Author

Wiid, Kannas, Visagie, Lourens, Burger, Hendrik, Malan, Daniel Francois, and Steyn, Willem Herman

Abstract

nSight-1 (QB50 AZ02) is a 2U size satellite developed in South Africa as part of the international EU-funded QB50 project. The satellite carries two main payloads: an atmospheric science instrument and an imager for Earth observation. Mission-specific challenges included integrating our imaging hardware into the severely space-and-power constrained 2U form factor enforced by the QB50 mission. Additionally, the available UHF data link needs to simultaneously serve the atmospheric science payload as well as the intended imaging mission. nSight-1 serves as a benchmark for CubeSat programmes, having been completed in full compliance with the QB50 project and launch requirements in a mere 6 months. Deployment into orbit was achieved on 25 May 2017. We present our programme’s development and early commissioning results, paying specific attention to nSight-1’s role as Earth Observation technology demonstrator.

Published
2017

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