Integrity of systems under decentralized integral control
A decentralized controller that maintains closed loop stability, when the individual controllers fail or are taken out of service, provides fault tolerance and flexibility in operation. Recently, necessary and sufficient conditions for the existence of a block decentralized controller...
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2009
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/90901 http://hdl.handle.net/10220/4504 |
| Summary: | A decentralized controller that maintains closed loop stability, when the individual controllers fail or are taken out of service,
provides fault tolerance and flexibility in operation. Recently, necessary and sufficient conditions for the existence of a block decentralized controller with integral
action for a system to possess integrity against controller failures were proposed. In this paper, these conditions are
equivalently expressed using the well-known notions of Niederlinski index (NI) and block relative gain (BRG). The alternate representation implies that under minor assumptions, the available necessary conditions based on NI and BRG are actually
both necessary and sufficient. We also show that confirming the existence of a block decentralized controller with integral action
such that the system has integrity is NP-hard. |
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