| タイトル | Comparative analysis of different configurations of PLC-based safety systems from reliability point of view |
| 本文（外部サイト） | http://hdl.handle.net/2060/19940023422 |
| 著者（英） | Tapia, Moiez A. |
| 著者所属（英） | Miami Univ. |
| 発行日 | 1993-12-01 |
| 言語 | eng |
| 内容記述 | The study of a comparative analysis of distinct multiplex and fault-tolerant configurations for a PLC-based safety system from a reliability point of view is presented. It considers simplex, duplex and fault-tolerant triple redundancy configurations. The standby unit in case of a duplex configuration has a failure rate which is k times the failure rate of the standby unit, the value of k varying from 0 to 1. For distinct values of MTTR and MTTF of the main unit, MTBF and availability for these configurations are calculated. The effect of duplexing only the PLC module or only the sensors and the actuators module, on the MTBF of the configuration, is also presented. The results are summarized and merits and demerits of various configurations under distinct environments are discussed. |
| NASA分類 | QUALITY ASSURANCE AND RELIABILITY |
| レポートNO | 94N27925 |
| 権利 | No Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/113049 |
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