Net simplex: Controller fault tolerance architecture in networked control systems

Jianguo Yao, Xue Liu, Guchuan Zhu, Lui Sha

Research output: Contribution to journalArticlepeer-review


The assurance of reliability becomes increasingly challenging as the complexity of networked control systems (NCS) rapidly increases. Simplex architecture was designed to tolerate control software design and implementation. This architecture consists of a high assurance controller (HAC) and a high performance controller (HPC). The HAC uses the linear state feedback control to create a large maximum stability region (MSR). The HPC aims at achieving a better control performance and may use any design. However, the plant's states under HPC must stay within the MSR, or the control is switched to HAC.

Original languageEnglish (US)
Article number6303908
Pages (from-to)346-356
Number of pages11
JournalIEEE Transactions on Industrial Informatics
Issue number1
StatePublished - Jan 7 2013


  • Cyber-physical systems
  • NetSimplex
  • networked control systems
  • reliability

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Information Systems
  • Computer Science Applications
  • Electrical and Electronic Engineering


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