The scientific and practical task was solved in the thesis – the development of information technology for identifying and resolving conflict situations during the flight of airplane-type unmanned aircraft to improve flight safety.
The content of the dissertation is expounded in four chapters, which present the results of the study.
The introduction substantiates the relevance of the research topic, formulates the purpose, objectives, object and subject of the study, indicates the research methods, reflects the relationship of the study with the research work of the International Research and Training Center for Information Technologies and Systems under NAS and MES of Ukraine, and presents the scientific novelty and practical significance of the obtained results. The personal contribution of the applicant in published works is indicated, information on the testing and use of the work results is provided.
Research object: the process of detecting, assessing and resolving conflict situations involving airplane-type unmanned aircraft.
Research subject: methods and information technologies for identifying and resolving conflict situations involving airplane-type unmanned aircraft.
The research purpose is to ensure the identification and resolution of airplane-type unmanned aircrafts conflict situations by assessing the degree of a conflict situation threat and comparing the degree of unmanned vehicles’ controllability.
The first chapter presents an analysis of the current state of determining and resolving conflict situations (CS) problems involving unmanned aerial vehicles (UAVs). It includes an overview of conflict situations for aircraft in general, an analysis of tactical and technical characteristics of UAVs, and the concept of the controlled state area for UAVs.
The second chapter is devoted to developing a method for identifying and resolving conflict situations. It presents a taxonomy of dimensional and functional characteristics of UAVs to determine parameter combinations that can be used in UAV interactions to resolve a conflict situation. A conflict situation degree of threat classification is based on factors such as the size of airplane-type unmanned aircraft (A-type UA), time to collision, speeds of the A-type UAs involved, and the bearing of the other A-type UA relative to its own. The determination of belonging to each of the four classes of threat degree is carried out according to the developed decision rules. Based on information about both A-type UAs involved in the conflict, their degrees of controllability are determined. The A-type UA that will perform the evasive maneuver and the A-type UA against which the maneuver will be performed are identified. At the final stage of the method, the type of evasive maneuver is selected, and the trajectory is calculated according to the base of rules for the divergence of the A-type UAs.
The third chapter substantiates and presents the developed information technology for identifying and resolving conflict situations during A-type UA flights to ensure their safety based on the threat degree. The proposed information technology covers three stages: flight along the initial route, resolution of the CS, and return to the initial route. The information technology, based on the assessment of the threat class determined by the degree of threat classification and considering the available controllability margin of the A-type UAs, allows for determining the maneuver method and modified rules for choosing the A-type UA’s divergence in space. The chapter presents a structural and functional diagram of the technology, algorithms, and a description of the modification of the rules for choosing the type of trajectory and the base of rules for the divergence of A-type UAs. It also discusses the prospects for developing information technology using modern communication technologies.
The fourth chapter presents the information technology implementation as a program module and the results of its testing on a simulator complex for modeling UAV flights. As a result of the testing and computer modeling of A-type UAs conflict situation resolutions, the effectiveness of the developed method was determined. The results of modeling with different parameters of the UAVs, for each of the three stages of the information technology separately and for the technology as a whole, on two variants of computing hardware are presented.
