Abstract:Improvements in reliability, safety, and operational efficiency of aeroengines can be brought in a cost-effective way using advanced control concepts, thus requiring only software updates of their digital control systems. The article presents a comprehensive approach in modular control system design suitable for small gas turbine engines. The control system is based on the methodology of situational control; this means control of the engine under all operational situations including atypical ones, also integra… Show more
“…In order to design an infrared imaging-based diagnostic system for use with turbojet engines and to construct a working knowledge base, a small iSTC-21v turbojet engine, developed in the Laboratory of Intelligent Control Systems of Aircraft Engines at the Faculty of Aeronautics, Technical University of Košice (Figure 9), was used [62]. This is a single-stream, single-shaft turbojet engine with a single-stage one-sided radial compressor, an annular combustion chamber, and a single-stage non-cooled gas turbine with a variable exhaust nozzle with full authority intelligent electronic digital control system developed from the TS-21 engine (Ljulka-Saturn, Rybinsk, Russia).…”
Section: Experimental Setup For Design Of the Infrared Imaging-based mentioning
There are only a few applications of infrared thermal imaging in aviation. In the area of turbojet engines, infrared imaging has been used to detect temperature field anomalies in order to identify structural defects in the materials of engine casings or other engine parts. In aviation applications, the evaluation of infrared images is usually performed manually by an expert. This paper deals with the design of an automatic intelligent system which evaluates the technical state and diagnoses a turbojet engine during its operation based on infrared thermal (IRT) images. A hybrid system interconnecting a self-organizing feature map and an expert system is designed for this purpose. A Kohonen neural network (the self-organizing feature map) is successfully applied to segment IRT images of a turbojet engine with high precision, and the expert system is then used to create diagnostic information from the segmented images. This paper represents a proof of concept of this hybrid system using data from a small iSTC-21v turbojet engine operating in laboratory conditions.
“…In order to design an infrared imaging-based diagnostic system for use with turbojet engines and to construct a working knowledge base, a small iSTC-21v turbojet engine, developed in the Laboratory of Intelligent Control Systems of Aircraft Engines at the Faculty of Aeronautics, Technical University of Košice (Figure 9), was used [62]. This is a single-stream, single-shaft turbojet engine with a single-stage one-sided radial compressor, an annular combustion chamber, and a single-stage non-cooled gas turbine with a variable exhaust nozzle with full authority intelligent electronic digital control system developed from the TS-21 engine (Ljulka-Saturn, Rybinsk, Russia).…”
Section: Experimental Setup For Design Of the Infrared Imaging-based mentioning
There are only a few applications of infrared thermal imaging in aviation. In the area of turbojet engines, infrared imaging has been used to detect temperature field anomalies in order to identify structural defects in the materials of engine casings or other engine parts. In aviation applications, the evaluation of infrared images is usually performed manually by an expert. This paper deals with the design of an automatic intelligent system which evaluates the technical state and diagnoses a turbojet engine during its operation based on infrared thermal (IRT) images. A hybrid system interconnecting a self-organizing feature map and an expert system is designed for this purpose. A Kohonen neural network (the self-organizing feature map) is successfully applied to segment IRT images of a turbojet engine with high precision, and the expert system is then used to create diagnostic information from the segmented images. This paper represents a proof of concept of this hybrid system using data from a small iSTC-21v turbojet engine operating in laboratory conditions.
“…The function f represents the function of the adaptor and Ke, Te are the parameters of the internal model as defined in (1) and Figure 3. The resulting adaptive control system architecture therefore represents an adaptive control system with an internal model [28,29,30].…”
Section: Adaptive Triple Loop Control Systemmentioning
confidence: 99%
“…The table shows that the Naslin adaptive controller performs as the best followed by the neural network adaptive algorithm, nonadaptive and the last is the performance quadratic adaptive controller, although it has also achieved acceptable control quality. To prove the validity of the concept, the triple loop control architecture was employed in laboratory conditions using the iSTC-21v engine [1,35,39]. The simulations are compared to the real data obtained in an experiment as shown in Figure 11, where the Naslin adaptor has been employed in the triple loop control system architecture.…”
Section: Evaluation Of the Control Systemmentioning
confidence: 99%
“…Digital control systems allow updating control algorithms as software packages, which can quickly and effortlessly improve fundamental operational characteristics of an engine. There are many approaches, which are today applied to fulfil this task [1,2,3,4]. Apart from the classical PID control systems, which are quite effective [5,6], more progressive approaches in control of turbojet engines can be taken [7,8].…”
Advanced control in the area of turbojet engines defines many different applied complex control strategies. Highly theoretical approaches and designs are often presented in this area. The article is aimed at practical aspects of adaptive controller design for a class of small turbojet engines in triple loop control architecture. The article presents a non-linear dynamic model of a small turbojet engine taking in account the environmental conditions, which it operates in. The designed triple loop control architecture shows increased precision of control keeping acceleration schedule of the simulated engine and is not susceptible to outer disturbances. The article shows pilot dynamic simulation tests, showing feasibility of the taken approach. It can also be used for other classes of turbojet engines as well other similar technical systems.
“…The selected theoretical frameworks of the Knowledge Alliance within the issues of Simulation and modelling of Security can be found within the work by Fuchs et al (2010) focused on the simulation of dangerous substance outflows into the environment a result of traffic accidents by dangerous substances transport; in the study by Dvorak et al (2010) on the enhancing of security on critical accident locations using telematics support; in the work by Balatka et al (2011) on the exposure of the environment and surface water todangerous liquids -the slop outflow model; in the study by Kelemen and Blišťanová (2014) on the applied knowledge in logistic modelling to handle the threat of floods with aviation logistic support; in the study by Kompis et al (2011) on the parallel computational models for composites reinforced by CNT-fibres for personal and vehicle protection materials; in the work by Vágner and Papová 2014) on the comparison of Radar Simulator for Air Traffic Control used also for the education of new Air Traffic Controllers; in the work by Pavolová and Tobisová (2013) on the model of supplier quality management in the transport company applied for air transport; in the study by Kuzma et al (2016) on the use of the CAX System as a tool for modeling construction elements in the aviation industry; or in the work by Fözö et al (2009) on the advanced anytime control algorithms and the modeling of turbojet engines etc. The selected theoretical frameworks of the Knowledge Alliance within the Applied Technical Sciences are within the work by on the call for more security in the technology revolution: in the work by Bučka and Kelemen (2009) on the analysis of the specific requirements related to the Slovak Air Force; in the book by Hovanec (2016) on the digital factory as a prerequisite for successful application in the area of ergonomics and the human factor; in the study by Andoga et al (2018)…”
The article examines the current aspects of new education and training of pilots within the Knowledge Alliance of Aviation Education as the State-Privat Partnership in the Education Services in the conditions of the Slovak Republic. This article represents the part of the feasibility study. In order to ensure the continuity, quality and safety in the aviation education of future military and civil pilots as the aviation professionals, research works of a similar nature are needed. This article used analysis and synthesis tools, the method "per partes" (integration in parts) and the expert method.
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