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Modellering av reserv- och nödkraftsystem i JAS 39 Gripen
Linköping University, Department of Electrical Engineering, Automatic Control.
2010 (Swedish)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesisAlternative title
Modeling of Auxiliary and Emergency Power System in JAS 39 Gripen (English)
Abstract [en]

Simulation is a vital tool during development of JAS 39 Gripen, since money and time can be saved.

The Auxiliary and Emergency Power System, AEPS, is a subsystem of the secondary power system in Gripen. It has the function of providing the aircraft with electrical and hydraulical power before activation and after deactivation of the main engine. The system also functions as backup in case of a safety critical problem in the main power supply system. The system basically consists of a control unit and an auxiliary gearbox. The gearbox is driven by an air turbine. An auxiliary generator and a hydraulic pump are mounted on the gearbox to provide the aircraft with electrical and hydraulical power. The airflow to the turbine is regulated by an Air Modulating Valve, AMV.

This report describes a new model of the AEPS. The model encompasses the logical control unit and a physical description of AMV, air turbine, auxiliary gearbox, auxiliary generator and the auxiliary hydraulic pump. The logical model is connected to the physical model whereby simulation of the whole system is made possible. The model is implemented in Matlab/Simulink.

This work provides a complete model of the AEPS which enables simulation of the dynamical processes. Verification was done by comparing simulation results with measurements from the real physical system. Satisfactory results are achieved, especially for inlet pressure for the air turbine and the speed of the auxiliary generator.

 

Abstract [sv]

Simulering är ett viktigt verktyg under utveckling av JAS 39 Gripen, eftersom detta möjliggör att både pengar och tid kan sparas.

Reserv- och nödkraftsystemet Auxiliary and Emergency Power System, AEPS, som är en del av Gripens hjälpkraftsystem, har till uppgift att försörja flygplanet med el- och hydraulkraft före uppstart och efter nedstängning av huvudmotor. Systemet fungerar även som backup vid bortfall av ordinarie kraftförsörjning. Grovt förenklat består systemet av en logisk kontrollenhet och en turbindriven reservväxellåda. På reservväxellådan finns en reservgenerator och en reservhydraulpump för elkraft respektive hydraulkraftförsörjning. Luftflödet till turbinen regleras av en så kallad Air Modulating Valve, AMV.

Den här rapporten beskriver en ny modell av AEPS. Modellen omfattar den logiska kontrollenheten och en fysikalisk beskrivning av systemets reglerventil, turbin, växellåda, reservgenerator och reservhydraulpump. Den logiska modellen kopplas samman med den fysikaliska och möjliggör simulering av hela systemet. Implementeringen görs i Matlab/Simulink.

Arbetet leder fram till en komplett modell för AEPS där dynamiska förlopp beskrivs. Verifiering görs genom att jämföra simuleringar med mätningar från det fysiska systemet. Tillfredställande resultat uppnås, speciellt för tryck in till turbin och varvtal för reservgenerator.

Place, publisher, year, edition, pages
2010. , 87 p.
Keyword [sv]
Modellering, Simulering, Reglerteknik, Hjälpkraft, Logik, Turbinmodellering, JAS 39 Gripen
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering Control Engineering
Identifiers
URN: urn:nbn:se:liu:diva-62341ISRN: LiTH-ISY-EX--10/4438--SEOAI: oai:DiVA.org:liu-62341DiVA: diva2:382476
Presentation
2010-11-05, Algoritmen, Linköping, 13:15 (Swedish)
Uppsok
Technology
Supervisors
Examiners
Available from: 2011-01-03 Created: 2010-11-28 Last updated: 2011-01-03Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
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  • modern-language-association-8th-edition
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  • de-DE
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Output format
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