Resumen
The tasks of the study were stated, the theoretical and methodological concept of determining the indicators of reliability and safety of hardware and software (S) for the systems of control of technological processes (ASCTP) was proposed. We presented the aspects of modern approaches to solving the scientific and technical problem of ensuring the necessary safety integrity level (SIL) of technical facilities of the ASCTP for sites of increased danger. As a result of analysis and studying the regulatory framework, the separate methods for determining quantitative indicators of safety control were proposed. It is offered to determine the SIL of the studied hardware of the ASCTP component using the hybrid methods of expert analysis. It is proposed to carry out the hazards and operability analysis with the use of special protocols, which show the relations between possible causes of faults of source elements, their influence on functioning of control system and effect of a fault on the functions of the system. The existing methods were explored and the original methods for determining the standardized indicators of reliability in the analysis of SIL (safety integrity level) were proposed. Problems of ensuring the required SIL during development of the systems of control of technological processes were considered. The existing models and the methods for determining the safety integrity level of the systems of controlling dangerous sites fully meet modern requirements for certification procedures. Rational methods for assessing the probability of hardware faults include the FTA (fault tree analysis), which determine the probability of initiating dangerous events, and the ETA (event tree analysis) to account for the faults of protection systems and determining the scenarios of consequences of such faults