NetSimplex: Controller Fault Tolerance Architecture in Networked Control Systems

作者：Yao, Jianguo^*; Liu, Xue; Zhu, Guchuan; Sha, Lui

来源：IEEE Transactions on Industrial Informatics, 2013, 9(1): 346-356.

DOI：10.1109/TII.2012.2219060

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

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.
The paper extends Simplex architecture from a single node control system to a networked control system, where the stability analysis of this networked Simplex (NetSimplex) must address the challenge of computing the networked system's MSR (NetMSR) under both network delays and varying parameters. A simulation study of a satellite attitude control system is carried out to examine the efficacy of NetSimplex architecture.

• 出版日期2013-2
• 单位上海交通大学