Dependability evaluation and management of control systems for possible publication in international standards

2016 Fiscal Year Final Research Report

• Project/Area Number: 26420410
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Control engineering/System engineering
• Research Institution: Tokyo University of Marine Science and Technology
• Principal Investigator: SUYAMA Koichi 東京海洋大学, 学術研究院, 教授 (80226612)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 制御工学 / システム工学 / ディペンダビリティ / アベイラビリティ / 国際規格

Outline of Final Research Achievements

Since there are the varieties in structures and functions of control systems, it is difficult to analyze their dependability according to international standards. In this research, we use the LFT description of control systems in order to absorb the variety of system structures and an idea of "available states" on state-transition diagrams used in continuous-time Markov analysis in order to absorb the variety of designed control functions. We then establish a general framework of availability analysis of control systems according to IEC standards, which is based on continuous-time Markov analysis and gives the value of steady state availability as the analysis result. It enables us to quantitatively evaluate fault tolerance of control systems in various application areas, and thus it succeeds in improving the practicality of fault-tolerant control.

Free Research Field

工学