Control-Quality Optimization for Distributed Embedded Systems with Adaptive Fault Tolerance
Författare
Summary, in English
In this paper, we propose a design framework for distributed embedded control systems that ensures reliable execution and high quality of control even if some computation nodes fail. When a node fails, the configuration of the underlying distributed system changes and the system must adapt to this new situation by activating tasks at operational nodes. The task mapping as well as schedules and control laws that are customized for the new configuration influence the control quality and must, therefore, be optimized. The number of possible configurations due to faults is exponential in the number of nodes in the system. This design-space complexity leads to unaffordable design time and large memory requirements to store information related to mappings, schedules, and controllers. We demonstrate that it is sufficient to synthesize solutions for a small number of base and minimal configurations to achieve fault tolerance with an inherent minimum level of control quality. We also propose an algorithm to further improve control quality with a priority-based search of the set of configurations and trade-offs between task migration and replication.
Avdelning/ar
Publiceringsår
2012
Språk
Engelska
Sidor
68-77
Publikation/Tidskrift/Serie
24th Euromicro Conference on Real-Time Systems (ECRTS), 2012
Fulltext
- Available as PDF - 716 kB
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Dokumenttyp
Konferensbidrag
Förlag
IEEE - Institute of Electrical and Electronics Engineers Inc.
Ämne
- Control Engineering
Conference name
24th Euromicro Conference on Real-Time Systems
Conference date
2012-07-10
Conference place
Pisa, Italy
Status
Published
Projekt
- ELLIIT LU P02: Co-Design of Robust and Secure Networked Embedded Control Systems
- ELLIIT-sched
Forskningsgrupp
- ELLIIT
- LCCC
ISBN/ISSN/Övrigt
- ISSN: 1068-3070
- ISBN: 978-1-4673-2032-0