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Wireless sensor networking, as a burgeoning technology, supports the monitoring of physical environments and control of sensor data, and has been widely applied in many fields. Due to its unique features, a number of formal theories, as well as verification tools, have been developed to make an in-depth study. In this paper, we propose a timed broadcasting language, the Timed Wireless Sensor Processes,...
Future spacecraft are envisioned as autonomous, miniature, intelligent and massively distributed space mechatronic systems. To improve the applicability of such small satellites for complex space missions, a virtual structure is proposed. This paper presents a novel study on a fractional satellite attitude decision and control system using one-bit processing, which could result in a highly efficient...
This paper presents a novel approach for wireless networked real-time control. Using delta-sigma modulation sensing and control signals are encoded in a binary format, which can be implemented in one-bit registers. The one bit signals are pulses that are able to be transmitted naturally in wireless. Control laws can be efficiently implemented with one-bit signals at both the input and output. The...
In this paper a hardware-in-loop simulator is presented to demonstrate the satellite sensor network concept developed at the Surrey Space Centre under the ESPACENET project. The simulator includes software that emulates satellite orbit dynamics in Low Earth Orbit and picosatellite sensor nodes. The picosatellite currently under development is based on the CubeSat platform. The main payload will be...
Future spacecraft are envisioned as massively distributed space systems flying in formation. In this paper we present an approach to signal routing over inter-satellite links (ISL) in a network of sub-kilogram satellites using a single-objective optimisation algorithm (SOA) and a multi-objective evolutionary algorithm (MOEA). The IEEE 802.11 protocol is modified for ISL, with a maximum communication...
Future spacecraft are envisioned as autonomous, miniature, intelligent and massively distributed systems. At the Surrey Space Centre, a research project is currently under investigation, which aims to develop a picosatellite sensor network using the CubeSat platform. The proposed satellite sensor network will be used to demonstrate technology advances in space, including modified IEEE 802.11 wireless...
This paper is concerned with application of standard wireless COTS protocols to space. Suitability of commercially available wireless sensor mote kits for communication inside and between satellites is investigated. Spacecraft applications of motes are being considered and a set of requirements are identified. Selected mote kits are tested under various scenarios complying with spacecraft testing...
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