The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Different parameters like temperatures, pressures, speed, and vibrations are used in evaluation of technical state of turbojet engines. The article presents a pioneering idea to expand this set of parameters with measurements of distortions in magnetic field in a close vicinity of the engine to obtain more information about its state, which can be further used in its diagnostic and control systems...
The paper deals with approaches in controlling of a complex electro-mechanical system. The proposed system is servomotor as a part of camera gimbal intended for UAVs (Unamnned Aerial Vehicles). Camera gimbal is a non-linear system with hysteresis and transport delays. The paper deals with experimental data driven method of servomotor modeling and also with classical control algorithms method and control...
The paper deals with mathematical modeling of a small turbojet iSTC-21v with variable exhaust nozzle. We evaluate and measure the appropriate parameters that describe the engine modes during changes of the exhaust nozzle diameter. The article describes methods of experimental identification (the method of successive integration and the approximation of characteristic response) applied on a system...
This paper deals with the calculation of 3D flow in a gas turbine and a nozzle with variable geometry of small jet engine ISTC-21V placed in a laboratory LIRSLM at Faculty of Aeronautics. It was used methods of meshing around the geometry of the CAD model and the CFD calculations for viscous flow. The resulting data was then compared to the measured in the laboratory and calculated from the analytical...
How to use an old turbo-compressor (turboshaft) engine and transfer it into a laboratory system used for design and development of progressive control, diagnostic and modeling algorithms transforming it into an intelligent turbo-compressor engine? The intelligent turbo-compressor engine currently designated as iSTC-21v is a small turbojet engine with a single sided radial compressor, bound combustion...
This paper provides a description of a hybrid method for automated evaluation of qualitative parameters. The method is presented on an example of efficiency evaluation by planning experiments with specified set of key performance indicators in case of a turbojet engine in laboratory of intelligent control systems of jet engines (LIRS LM). The implementation of this example is done in form of a state...
Small turbo-compressor engines represent a specific class of such engines with application in small aircraft and as auxiliary energetic units. Energetic efficiency and high safety standards are nowadays key factors in practical applications of small turbo-compressor engines. One approach to achieve these aims is to design and utilize progressive control algorithms. As turbo-compressor engines represent...
In order to achieve higher efficiency and to explore new progressive approaches in control of turbo-jet engines with more than one degree of freedom, the experimental turbojet engine MPM-20 has to be expanded with flexible geometry exhaust nozzle. The article is aimed at design of a mechanism, which would control the variable geometry exhaust nozzle of the engine allowing its practical application...
The presented paper proposes a design of a scientific research information system (SRIS), intended for real world use according to existing requirements and processes in the Laboratory of Intelligent Control Systems of Aircraft Engines. The novelty of the proposed SRIS lies in universal and narrow scope of the system and digitalization of existing manual processes, with the addition of algorithms...
This paper presents a general description of behavior of a complex thermodynamic system, represented by a small turbojet engine MPM 20. The main aim is to provide basic constraints of chosen measured parameters. Obtained results will be used in future data filtering, to recognize faulty output sensor values, critical situations and normal engine operation field. According to these constraints the...
Controlling position of an aircraft in its trajectory is a matter of high precision. The requirement on precision is becoming a priority primarily in the phase of landing, when the aircraft is in automated mode of landing controlling/maintaining lateral deviation along the trajectory by autopilot. The contribution is describing shaping and modeling control signals in the stage of final approach for...
Development of aircraft engines is aimed on increase of reliability, efficiency and ecology of operation. The presently still used hydro-mechanic control systems are being replaced by electronic ones characterized by high speed, precision of control and ability to optimize all operating regimes of an engine. One of the aims of research in the Laboratory of intelligent control systems of aircraft engines...
The article deals with description of thermodynamic processes in a class of small turbojet engines with description of experimental and analytic modeling approaches to create a mathematical model. The model will describe a small turbojet engine as a system with one degree of freedom (fast exhaust nozzle), two degrees of freedom controlled by fuel supply and exhaust nozzle diameter. The article then...
The article deals with basic description of turboprop engines as a special class of turbine engines - advanced approaches in its modeling and control. The article will deal with description of analytical and experimental approaches in modeling of individual parts of the engine with description of their thermo-dynamics and states. Such engines are systems with two degrees of freedom and demand advanced...
The paper deals with approaches in modeling of a complex electro-hydro-mechanical system. The proposed system is a fuel metering device that is a non-linear system with hysteresis and transport delays. The classical methods of modeling demand knowledge of mechanics and inner structure of the researched object. The paper deals mainly with experimental data driven methods of modeling. The created models...
This paper deals with modeling and diagnostics of complex systems and with a prestart diagnostics expert system design and implementation. In the area of modeling, the authors describe dynamic models of the speed dependence upon the fuel flow supply of a small turbojet engine MPM-20. The first model is done with use of neural networks and the second is a linear model. Both models are then methodologically...
The article is focused on diagnostics in the field of aviation turbo-jet engines. Evaluation of their technical status, and potential failures and pre-failure processes can be improved by monitoring their thermally loaded components. Part of the research in the given area also involves mathematical modeling of the channel measuring the exhaust gases temperature, using neural networks to compensate...
The paper deals with modeling and diagnostics of complex systems. In the area of modeling, the authors describe dynamic models of dependence of speed upon fuel flow supply of a small turbojet engine MPM-20. The first model is done with use of neural networks and the second is a linear model. Both models are then methodologically incorporated into the diagnostic and backup system of the optical sensor...
Mathematical modeling represents an efficient method allowing us to examine properties of a researched object. Realization of mathematic models has become a fundamental part of design of many complex systems. By use of simulation, we can experiment with mathematical model similarly as with the real object without the risk of damage and with much lower expenses. Modeling represents experimental process...
This article is concentrated on research of magnetic aura of aircraft engine MPM 20 during its operating modes. Next aim of this article is description of usability of magnetic aura for MPM 20 situational control by fuzzy controller.
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.