International Society of Science and Applied Technologies |
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Reliability Evaluations of a Control System Connected with the Network | ||||
Author | Mitsuhiro Imaizumi
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Co-Author(s) | Mitsutaka Kimura
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Abstract | As the Internet technology has developed, not only the information system but also the control system which controls various devices have become connected with the Internet. The operational efficiency of a control system is improved by being connected with the Internet. However, it increases the risk of cyber attacks. Meanwhile, in terms of the control system, the real-time property which guarantees response within strict time constraints is required. This paper considers the optimal policy of a control system connected with the network. The control system consists of N units. If cyber attack cannot be detected, the system becomes failure. If the N-th operating unit cannot finish one processing until a time limit T, a processing of system interrupts. The mean time to system failure or interruption is derived. Further, the optimal policy which minimizes the cost effectiveness is discussed. Finally, numerical examples are given.
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Keywords | Security, Control system, Markov renewal process, Optimal policy | |||
Article #: 2136 |
August 6-8, 2015 - Philadelphia, Pennsylvia, U.S.A. |