This article deals with the developed methodology of research information flows in the distributed control system network of a ship electric power system, based on the notion of software structure in the form of pattern network, in which each generator is assigned to a particular software object, and communication relations represent different types of information interactions between objects. Using the queuing and pattern theories gave the opportunity to develop the algorithm of software formal reorganization in the context of reduction system’s response time.
Słowa kluczowe: Power plant, Information flows, Pattern network, Request queue.
Badano przepływ informacji w systemie zasilania okrętu w którym w sieci wykprzystano oprogramowanie sterujące. W algorytmie sterowania każdy generator jest przypisany do odpowiedniej partii oprogramowania.
Keywords: przesyłania informacji, sieć okrętowa, sieć zasilająca
Modern automation systems are spatially distributed systems. They are created with the use of multi-task controllers and have network organization [1, 2]. Different parts of the system have different physical nature (continuous object and discrete control part), while the whole system can be described by a complex combination of differential equations, algebraic equations, inequalities, and logical conditions. The tasks in a microcontroller are overlapped and blocked out while waiting for shared resources. The time of tasks execution may vary. Network transmission takes place with delays, magnitude and stability of which depends both on the communication protocol and on channels utilization. To avoid the negative impact of such delay and make the best use of computing resources, which are available for control system, design engineering of control algorithms and software should be conducted with the consideration of these factors. Nonoptimal management of information flows without taking into account the inertia of facilities management and delays in time that occur when sending commands over the network will lead to degradation of quality control. Automatic control system and sub-system of electric power unit protection will not work adequate without providing them with timely and accurate information about technical condition of diesel generator sets and other components. Inasmuch as generating units start up and putting into operation requires relatively long time, the reliable information about damages should be acquired as soon as possible. Therefore, the tasks of information flows analyses and assessment of impact of autonomous power system on the information network are urgent. The most difficult step in the implementation of automated control system is the development of software that meets the appropriate quality standards [3-5]. The toplevel software task is remote monitoring and control of electric power system [...]
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