A system can be defined as an array of parts designed to accomplish an objective according to plan. The parts of the system are arranged in a fixed manner, which are inter related to each other and each of them play an important role.

The systems approach is the foundation of systems engineering. It is fundamental to systems, systems thinking, systems methodology, systems design, and systems engineering. It is a set of top-level rules from which systems engineering methodologies can be derived.

2015

The word "system" is used in many areas (e.g. solar system, telephone system, nervous system, transportation system, ecological system, etc.) mainly to convey a meaning of ordering and/or interaction. The systems of interest for Systems Engineering are a specific subset: Engineered Systems. These are defined as "an integrated set of elements, subsystems, or assemblies that accomplish a defined objective." Having delimitated the area of application, what appears to be worth to be analyzed is if, and how, Systems Engineering differentiates itself from "Traditional Engineering". A useful, and very concise, reference for the description of engineering (design) is the one from the Royal Academy of Engineering (Royal Academy of Engineering, 1999):  Need-All design begins with a clearly defined need;  Vision-All designs arise from a creative response to a need;  Delivery-All designs result in a system, product or project which meets the need.

Актуальні питання у сучасній науці

Taking into account that all systems tend to function in the same way, the authors emphasize the significance of a deep understanding of the concept of a system for any scientific research. A holistic view of the concept of a system, its development, and its application gives deep understanding of how to organize the process of scientific research effectively. Therefore, this retrospective view provides insight into the past contributions of system thinkers, researchers, and educators to the evolutionary development and application of the concept of systems in different fields of knowledge. The article aims to review the concept of system, analyze the definitions of "system" in dictionaries and scientific research, compare the ontological, epistemological, and methodological interpretation of the term "system" from general to special, trace the genesis of the system; evaluate different concepts. In the research, data collection and analysis were used to trace the development of the concept of a system. Concept review, as a study type, was used to evaluate different meanings of the concept of a system to figure out which one is the most appropriate in the system of higher education. The analysis was structured around the theoretical and methodological foundations of the concept of a system.

In it's broadest conception, a "system" may be described as a complex of interacting components together with the relationships among them that permit the identification of a boundary-maintaining entity or process. Since social and psychological phenomena tend to resist quantitative modeling by posing basic difficulties already on the plane of boundary identification, alternative approaches must be relied upon. One such approach draws on the body of knowledge derived from General System Theory and its application in the domain of human activity systems.

Fırat Üniversitesi Mühendislik Bilimleri Dergisi, 2019

Öz: Şebekeden çekilen reaktif güç ve harmonikler güç kalitesi problemini oluşturmaktadır. Bu problemler aktif güç filtresi olarak bilinen güç elektroniği devrelerinin uygun algoritmalar kullanılarak denetlenmesiyle büyük oranda iyileştirilebilmektedir. Bu çalışmada bir fazlı paralel aktif güç filtresi modeli oluşturulmuştur. Bu paralel aktif güç filtresinin denetimi histerisiz bant akım denetim yöntemi kullanılan bir evirici ile yapılmıştır. Sistem p-q teorisi tabanlı olup bu teori bir fazlı sisteme göre uyarlanmıştır. Tüm sistem Matlab/Simulink' te oluşturulmuş olup hem paralel aktif güç filtresi devre dışı iken, hem de devreye alındıktan sonra elde edilen akım dalga şekilleri gösterilmiştir. Kullanılan paralel aktif güç filtresi ile harmoniklerin bastırıldığı ve güç kalitesindeki iyileşmenin açık olarak görüldüğü sonuçlar verilmiştir. Anahtar kelimeler: Aktif güç filtresi, harmonik bastırma, histerisiz akım denetleyici, reaktif güç kompanzasyonu.