Nº 2 (2022)
Surveys
PROBLEMS OF MANAGING THE FIRE SAFETY SYSTEM OF A FACILITY. PART II: MONITORING METHODS
Resumo
This paper overviews fire safety monitoring methods for a facility and state assessment methods for socio-economic systems used in fire safety. As discovered, none of the existing fire safety monitoring systems has a decision support procedure for adjusting a parameter (or several parameters) deviating from a given range. The majority of fire safety monitoring systems only assess the state of fire protection systems and transmit information on their triggering to the operational services. Thus, fire safety monitoring is simplified to assessing the state of fire automation systems, which cannot objectively reflect the fire safety state of the facility. As established, the integrated rating procedure is a most developed tool for assessing the state of a complex socio-economic system. This procedure is widespread in the theory of active systems. Its application to fire safety assessment is described. The existing contradictions in the management of fire safety systems are revealed, and some ways to resolve them are presented.
Control Sciences. 2022;(2):3-11
3-11
Control in Social and Economic Systems
A MATHEMATICAL MODEL OF MANAGING A REGULATED MONOPOLY DISTRICT HEATING MARKET
Resumo
This paper formulates an approach to managing the district heating of consumers in a hierarchical two-level system. The upper level is a regulator (e.g., a regional tariff service) that adjusts the heat energy tariff for consumers. The lower level is a district heating system that technologically and organizationally combines heat energy production and transport within a unified heat supply organization. The interaction of all participants in the process of heat supply to consumers is described. Optimization criteria are proposed for the upper and lower levels. A bi-level mathematical model of the district heating system is developed using the theory of hydraulic circuits and bi-level programming. This model operates in the conditions of a regulated monopoly heat energy market. The developed approach is applied to the real district heating system of Angarsk.
Control Sciences. 2022;(2):12-23
12-23
Control of Technical Systems and Industrial Processes
Redundancy management of ONBOARD EQUIPMENT: AN ARBITRATION APPROACH BASED ON CONFIGURATION SUPERVISORS
Resumo
This paper considers the operational reconfiguration of an onboard equipment complex with redundant heterogeneous and non-universal components for achieving fault tolerance and other operational and technical characteristics. An approach to building a redundancy management system (RMS) is formulated as a conceptual solution. This approach uses configuration supervisors according to the number of previously developed competitive configurations of the complex. Each supervisor can be self-sufficient to execute the following functions: monitor the readiness and functional efficiency indicators of the components included in the corresponding configuration; participate in arbitration for the right to implement the corresponding configuration in current conditions; initiate and control the operation of the corresponding configuration. A three-stage algorithm of the RMS is proposed. It contains a sequence of paired arbitrations of computers and configurations. An illustrative example explains RMS operation in different modes of the complex under detectable and undetectable failures of equipment components and computers allocated for redundancy management. The proposed approach unifies and rationalizes the information and logical structure of redundancy management tools, thereby simplifying the creation of an efficient RMS with flexibility, a wide coverage of equipment and configurations, and a significant reduction of bottlenecks in the redundant complex.
Control Sciences. 2022;(2):24-35
24-35
THE handling-comfort trade-off in a quarter-car system: Automatic adaptive management via Active Disturbance Rejection Control
Resumo
The effectiveness of a vehicle suspension is often assessed by maximum passenger comfort given continuous contact with the road (road holding). This paper investigates managing the comfort-handling trade-off in a quarter-car suspension system via active disturbance rejection control (ADRC). An adaptive control law is built to manage this trade-off automatically depending on the ADRC parameters. The idea is to use the ADRC-estimated disturbance signal to adjust the system’s domain of interest. The effectiveness of the proposed approach is validated: the adaptive control law is tested for a nonlinear hydraulic suspension system. Moreover, the effects of road disturbances amplitudes and road quality on the system performance are studied. Simulation results show the smoothness and simplicity of the adaptive algorithm for managing the comfort-handling trade-off.
Control Sciences. 2022;(2):36-48
36-48