access icon free Partial TMR method for on-orbit processors based on PageRank algorithm

On-orbit processors generally require reinforcement due to the harsh space radiation environment. Although the traditional full triple modular redundancy (TMR) method can effectively reinforce circuits, it requires excessive physical footprints and energy consumptions. To address this problem, this Letter proposes a general partial TMR method that can effectively reinforce a circuit. The method is based on the PageRank algorithm for sorting the importance of the triggers in a circuit, and the mean time between failure based on the dual logic cone model is used as the criterion to determine triggers that require redundancy under the partial TMR method. The arithmetic module of an optical image processing platform is tested to verify the effectiveness of the partial TMR method proposed in this Letter.

Inspec keywords: radiation hardening (electronics); redundancy; integrated circuit modelling; failure analysis; microprocessor chips

Other keywords: harsh space radiation environment; general partial TMR method; arithmetic module; on-orbit processors; energy consumptions; optical image processing platform; dual logic cone model; traditional full triple modular redundancy method; PageRank algorithm; mean time between failure

Subjects: Microprocessors and microcomputers; Radiation effects (semiconductor technology); Reliability; Digital circuit design, modelling and testing; Microprocessor chips

http://iet.metastore.ingenta.com/content/journals/10.1049/el.2018.7113
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