Centrifugal compressors are widely used and stability is the key factor. At low mass flow rates d... more Centrifugal compressors are widely used and stability is the key factor. At low mass flow rates different instabilities can occur from which the most dangerous is surge. In contest to conventional passive surge avoidance systems which work with reduced efficiency and have limitations up to date surge suppression systems offer broader operating range and excellent dynamics. The aim of this paper is to develop and simulate linear quadratic regulator for BLDC controlled compressor. The BLDC was tested with different disturbances for the compression system and the result show that the BLDC was able to stabilize the compressor in a significantly road range than its original characteristic.
The goal of this paper is to show the results of the design of a robust, optimal servo control ba... more The goal of this paper is to show the results of the design of a robust, optimal servo control based on LQ for a small scale turbojet engine that is equipped with a variable exhaust nozzle. As the mathematical model and the identification of the plant from previous steps of this research are obtained, now the development and verification of the controller is solved. The major difference between military and civil turbine power plants is the variable exhaust nozzle, which increases the flexibility of the control but also results in a more complex model.
Centrifugal compressors play an important role in different industrial fields including transport... more Centrifugal compressors play an important role in different industrial fields including transportation and energy management. Their stable operation is critical for the systems in which they are installed, thus surge protection is an essential part of their control. This paper introduces the development of a simplified one-dimensional mathematical model that is able to predict the changes in compressor characteristic map due to a novel flow injection method called Blade Load Distribution Control (BLDC). These devices are practically small orifices in the hub of the centrifugal compressor, which can inject pressurized flow preferably from the discharge of the compressor in order to stabilize the main flow of the blade passages. The base flow will deflect according to the amount of the injection, which has been investigated in the earlier part of the research. The calculation procedure is based on the Split Compression Model published previously for a different method and now it is adapted to achieve computation of BLDC system. The paper introduces the basic assumptions, the buildup of the mathematical model and presents the results that can serve later as a basis of implementation of active surge control devices. The primary aim of this paper is to show the expected effect of the BLDC injection, whether this system is worth to be implemented in centrifugal compressors.
A gázturbinás hajtóművek napjainkban már szinte kizárólagosan digitális elektronikus szabályozó r... more A gázturbinás hajtóművek napjainkban már szinte kizárólagosan digitális elektronikus szabályozó rendszerrel (Full Authority Digital Electronic Control, FADEC) rendelkeznek, jobb pontosságuk, kisebb méretük, tömegük és karbantartásigényük miatt. A BME VRHT jogelődjén 2009-ben indult meg a TKT-1 gázturbinás sugárhajtómű megalkotását és üzembe állítását követően a szabályozórendszer tervezése. A cikk bemutatja a fejlesztés főbb állomásait a kiinduló, valamint további típusokon (Deutz T216, PD-60R), a különféle alkalmazott szabályozási törvényszerűségeket (fordulatszám, hajtómű nyomás- és teljesítményviszony). Továbbá bemutatjuk azokat az algoritmusokat is (PID, lineáris kvadratikus és csúszómód-szabályozások), amelyeket FADEC-rendszereinkben kidolgoztunk.Munkánk egyik legnagyobb eredménye, hogy a gázturbinás sugárhajtómű próbapadján ezeketaz algoritmusokat valós körülmények között is le tudjuk ellenőrizni.
2017 International Conference on Military Technologies (ICMT), 2017
The goal of this paper is to show the results of the design of a robust, optimal servo control ba... more The goal of this paper is to show the results of the design of a robust, optimal servo control based on LQ for a small scale turbojet engine that is equipped with a variable exhaust nozzle. As the mathematical model and the identification of the plant from previous steps of this research are obtained, now the development and verification of the controller is solved. The major difference between military and civil turbine power plants is the variable exhaust nozzle, which increases the flexibility of the control but also results in a more complex model.
2020 New Trends in Aviation Development (NTAD), 2020
Centrifugal compressors are widely used and stability is the key factor. At low mass flow rates d... more Centrifugal compressors are widely used and stability is the key factor. At low mass flow rates different instabilities can occur from which the most dangerous is surge. In contest to conventional passive surge avoidance systems which work with reduced efficiency and have limitations up to date surge suppression systems offer broader operating range and excellent dynamics. The aim of this paper is to develop and simulate linear quadratic regulator for BLDC controlled compressor. The BLDC was tested with different disturbances for the compression system and the result show that the BLDC was able to stabilize the compressor in a significantly road range than its original characteristic.
Centrifugal compressors are widespread in gas turbines – for example in thrust or turboshaft engi... more Centrifugal compressors are widespread in gas turbines – for example in thrust or turboshaft engines in the field of aviation, or in power generation. The main features of centrifugal compressors are high pressure ratio per each stage and stable operation at a relatively wide range of the fluid flow. Despite these advantages at low mass flow rates, some kind of instabilities appear (like rotating stall and surge), which are the same in axial compressors and which may occur in the form of total pressure and mass flow rate fluctuation. It is very important to avoid these instabilities to protect the equipment and the connected systems, because the energy stored in the fluctuations is enough for the disintegration of impeller blades as well. Creating a mathematical model of the centrifugal compressor is very important regarding the prediction of the system behavior in different operational modes, and in the unstable operational ranges an active surge suppression system could avert the ...
2020 IEEE 18th World Symposium on Applied Machine Intelligence and Informatics (SAMI), 2020
Centrifugal compressors play an important role in different industrial fields including transport... more Centrifugal compressors play an important role in different industrial fields including transportation and energy management. Their stable operation is critical for the systems in which they are installed, thus surge protection is an essential part of their control. This paper introduces the development of a simplified one-dimensional mathematical model that is able to predict the changes in compressor characteristic map due to a novel flow injection method called Blade Load Distribution Control (BLDC). These devices are practically small orifices in the hub of the centrifugal compressor, which can inject pressurized flow preferably from the discharge of the compressor in order to stabilize the main flow of the blade passages. The base flow will deflect according to the amount of the injection, which has been investigated in the earlier part of the research. The calculation procedure is based on the Split Compression Model published previously for a different method and now it is adapted to achieve computation of BLDC system. The paper introduces the basic assumptions, the buildup of the mathematical model and presents the results that can serve later as a basis of implementation of active surge control devices. The primary aim of this paper is to show the expected effect of the BLDC injection, whether this system is worth to be implemented in centrifugal compressors.
Centrifugal compressors are widely used and stability is the key factor. At low mass flow rates d... more Centrifugal compressors are widely used and stability is the key factor. At low mass flow rates different instabilities can occur from which the most dangerous is surge. In contest to conventional passive surge avoidance systems which work with reduced efficiency and have limitations up to date surge suppression systems offer broader operating range and excellent dynamics. The aim of this paper is to develop and simulate linear quadratic regulator for BLDC controlled compressor. The BLDC was tested with different disturbances for the compression system and the result show that the BLDC was able to stabilize the compressor in a significantly road range than its original characteristic.
The goal of this paper is to show the results of the design of a robust, optimal servo control ba... more The goal of this paper is to show the results of the design of a robust, optimal servo control based on LQ for a small scale turbojet engine that is equipped with a variable exhaust nozzle. As the mathematical model and the identification of the plant from previous steps of this research are obtained, now the development and verification of the controller is solved. The major difference between military and civil turbine power plants is the variable exhaust nozzle, which increases the flexibility of the control but also results in a more complex model.
Centrifugal compressors play an important role in different industrial fields including transport... more Centrifugal compressors play an important role in different industrial fields including transportation and energy management. Their stable operation is critical for the systems in which they are installed, thus surge protection is an essential part of their control. This paper introduces the development of a simplified one-dimensional mathematical model that is able to predict the changes in compressor characteristic map due to a novel flow injection method called Blade Load Distribution Control (BLDC). These devices are practically small orifices in the hub of the centrifugal compressor, which can inject pressurized flow preferably from the discharge of the compressor in order to stabilize the main flow of the blade passages. The base flow will deflect according to the amount of the injection, which has been investigated in the earlier part of the research. The calculation procedure is based on the Split Compression Model published previously for a different method and now it is adapted to achieve computation of BLDC system. The paper introduces the basic assumptions, the buildup of the mathematical model and presents the results that can serve later as a basis of implementation of active surge control devices. The primary aim of this paper is to show the expected effect of the BLDC injection, whether this system is worth to be implemented in centrifugal compressors.
A gázturbinás hajtóművek napjainkban már szinte kizárólagosan digitális elektronikus szabályozó r... more A gázturbinás hajtóművek napjainkban már szinte kizárólagosan digitális elektronikus szabályozó rendszerrel (Full Authority Digital Electronic Control, FADEC) rendelkeznek, jobb pontosságuk, kisebb méretük, tömegük és karbantartásigényük miatt. A BME VRHT jogelődjén 2009-ben indult meg a TKT-1 gázturbinás sugárhajtómű megalkotását és üzembe állítását követően a szabályozórendszer tervezése. A cikk bemutatja a fejlesztés főbb állomásait a kiinduló, valamint további típusokon (Deutz T216, PD-60R), a különféle alkalmazott szabályozási törvényszerűségeket (fordulatszám, hajtómű nyomás- és teljesítményviszony). Továbbá bemutatjuk azokat az algoritmusokat is (PID, lineáris kvadratikus és csúszómód-szabályozások), amelyeket FADEC-rendszereinkben kidolgoztunk.Munkánk egyik legnagyobb eredménye, hogy a gázturbinás sugárhajtómű próbapadján ezeketaz algoritmusokat valós körülmények között is le tudjuk ellenőrizni.
2017 International Conference on Military Technologies (ICMT), 2017
The goal of this paper is to show the results of the design of a robust, optimal servo control ba... more The goal of this paper is to show the results of the design of a robust, optimal servo control based on LQ for a small scale turbojet engine that is equipped with a variable exhaust nozzle. As the mathematical model and the identification of the plant from previous steps of this research are obtained, now the development and verification of the controller is solved. The major difference between military and civil turbine power plants is the variable exhaust nozzle, which increases the flexibility of the control but also results in a more complex model.
2020 New Trends in Aviation Development (NTAD), 2020
Centrifugal compressors are widely used and stability is the key factor. At low mass flow rates d... more Centrifugal compressors are widely used and stability is the key factor. At low mass flow rates different instabilities can occur from which the most dangerous is surge. In contest to conventional passive surge avoidance systems which work with reduced efficiency and have limitations up to date surge suppression systems offer broader operating range and excellent dynamics. The aim of this paper is to develop and simulate linear quadratic regulator for BLDC controlled compressor. The BLDC was tested with different disturbances for the compression system and the result show that the BLDC was able to stabilize the compressor in a significantly road range than its original characteristic.
Centrifugal compressors are widespread in gas turbines – for example in thrust or turboshaft engi... more Centrifugal compressors are widespread in gas turbines – for example in thrust or turboshaft engines in the field of aviation, or in power generation. The main features of centrifugal compressors are high pressure ratio per each stage and stable operation at a relatively wide range of the fluid flow. Despite these advantages at low mass flow rates, some kind of instabilities appear (like rotating stall and surge), which are the same in axial compressors and which may occur in the form of total pressure and mass flow rate fluctuation. It is very important to avoid these instabilities to protect the equipment and the connected systems, because the energy stored in the fluctuations is enough for the disintegration of impeller blades as well. Creating a mathematical model of the centrifugal compressor is very important regarding the prediction of the system behavior in different operational modes, and in the unstable operational ranges an active surge suppression system could avert the ...
2020 IEEE 18th World Symposium on Applied Machine Intelligence and Informatics (SAMI), 2020
Centrifugal compressors play an important role in different industrial fields including transport... more Centrifugal compressors play an important role in different industrial fields including transportation and energy management. Their stable operation is critical for the systems in which they are installed, thus surge protection is an essential part of their control. This paper introduces the development of a simplified one-dimensional mathematical model that is able to predict the changes in compressor characteristic map due to a novel flow injection method called Blade Load Distribution Control (BLDC). These devices are practically small orifices in the hub of the centrifugal compressor, which can inject pressurized flow preferably from the discharge of the compressor in order to stabilize the main flow of the blade passages. The base flow will deflect according to the amount of the injection, which has been investigated in the earlier part of the research. The calculation procedure is based on the Split Compression Model published previously for a different method and now it is adapted to achieve computation of BLDC system. The paper introduces the basic assumptions, the buildup of the mathematical model and presents the results that can serve later as a basis of implementation of active surge control devices. The primary aim of this paper is to show the expected effect of the BLDC injection, whether this system is worth to be implemented in centrifugal compressors.
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