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In microsatellite missions devoted to remote sensing, the cost-reliability issue is an important constraint. This paper presents a low-cost methodology to simulate the reliability of a system for the development of fault-tolerant space systems. This methodology does not rely on special facilities or expensive equipment and is focused on the onboard data handling (OBDH) system for microsatellite's...
Commercial SRAM-based, field-programmable gate arrays (FPGAs) have the capability to provide space applications with the necessary performance, energy-efficiency, and adaptability to meet next-generation mission requirements. However, mitigating an FPGA's susceptibility to radiation-induced faults is challenging. Triple-modular redundancy (TMR) techniques are traditionally used to mitigate radiation...
Reconfigurable Field Programmable Gate Arrays (rFPGAs) are employed extensively in spacecraft electronic systems to implement low-power adaptable systems that provide high density functionality. A challenge that must be tackled during system design is their high susceptibility to radiation induced Single Event Upsets (SEUs). A burst of energized particles may cause extensive damage to circuits. Even...
Commonly in space systems there are subsystems or instruments with a low or null communication or processing capabilities. This paper describes a high reliable, low power consumption and small sized remote terminal unit aimed at connecting these subsystems to the satellite's system bus. The design includes a SoC based on an 80C32 microcontroller and provides a 2.0 CAN controller; a general purpose...
This research explores the employment of Reduced Precision Redundancy (RPR) as a power saving alternative to traditional Triple Modular Redundancy (TMR). This paper focuses on the details of RPR implementation and the effect of RPR fault tolerance on the performance of spacecraft systems. RPR-protected system performance is evaluated using a signal-to-noise ratio analogy developed with Matlab and...
The purpose of TAFT fault tolerance studies conducted at CNES is to prepare the space community for the significant evolution linked to the usage of COTS components for developing spacecraft supercomputers. CNES has patented the DMT and DT2 fault-tolerant architectures with 'light' features. The development of a DMT/DT2 testbench based on a PowerPC7448 microprocessor from e2v is presented in this...
Current space applications are pushing for improved on-board processing abilities, in terms of higher computing power, flexibility and fault-resistance, in order to keep up with the huge amount of collected scientific data. Multiprocessor systems seem a viable solution to match these requisites. In particular, systems employing Multistage Interconnection Networks (MINs) offer the advantage of an effective...
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