Methodological approach to the system assessment of the safety of complex technical systems

Abstract

An approach to the system assessment of the danger and safety of complex technical systems is considered. It is assumed that security is not a property similar to the definition of reliability. Safety is the state of a system when it is present or functioning in a certain environment, in which there are no negative impacts on composite objects within this system or on other objects located in this environment. A methodological approach to the qualitative and quantitative determination of danger and safety, as well as the risks of dangerous situations, is presented. The potential loss function depending on the vector of all phase coordinates of the complex technical system (CTS) is considered. In the general case, a potential loss function is presented that depends on the vector of all the phase coordinates of the CTS, and not only its spatial position. The criteria defining dangerous (or unacceptable) states of the system should be dynamic in the sense that they should depend on the stage of the system functioning. The approach to assessing the safety of the system operation consists in identifying a set of unacceptable values of the vector of system parameters and the vector of unacceptable phase coordinates. The approach to the assessment of the safety of the functioning of the STS according to the requirements of ensuring the required level of operational efficiency is considered. The evaluation of the effectiveness of the system, taking into account the safety conditions, is determined. The identification of the set of acceptable values of the vector of CTS parameters by the criterion of efficiency for the intended purpose is carried out. The indicator of the effectiveness of the functioning of the CTS is determined, taking into account the requirements for safety and aggressive influences from the external environment.