Paper & Publications

Electrical Design

Several research papers have been written in cooperation with BTU Cottbus Senftenberg, HAW Hamburg University of Applied Sciences, University of Applied Science Berlin, University of Applied Science Mittweida, University of Applied Science Wildau and Alfonso X el Sabio University (UAX) in cooperation with Fairleigh Dickinson University.

For information on QPAC R&D projects and papers, please contact:

Tel.: +49 40 9999 872 0
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Latest Publications:

Sparr, H., Hausdorf, A., Jeskea, P., Kale, N., Schacht, R., Ziegenhorn, M., Zysk, O. (2015)
"+-270 VDC Aircraft Harness Structural Analysis"
1st International Conference on Structural Integrity

Kale, N., Ilkay, F., Zysk, O., (2015) "Particular risk analysis: impact on hybrid aircraft design", International Journal of Structural Integrity, Vol. 6 Iss: 3, pp.402 - 409

Kale, N., Bubos, J., Zysk, O., (2013): Certification requirements for hybrid aircraft
3rd EASN International Workshop on Aerostructures, Politecnico di Milano.

Liesk, T., Nahon M., Boulet B. (2013): Design and Experimental Validation of a Nonlinear Low-Level Controller for an Unmanned Fin-Less Airship. IEEE Trans. Contr. Sys. Techn. 21(1): 149-161

Paper & Thesis

Title: "Risk assessment of production processes: Procurement of manufacturing equipment for an aircraft manufacturer"
Author: Thomas Peters
University: FH-Stralsund
Type: Bachelor Thesis
Date: 03.2017
Under the topic Risk assessment of processes, the aim of the thesis was to investigate a procurement process of small jigs in relation to possible risks. This would allow to take over similar assignments with a higher level of planning security and moreover it should help to avoid process deviations at following processes. For this purpose three examples are showing, which kind of consequences can result from process disturbances. After that an overview explains which standards are applicable for aviation industry and which notes can be found their in relation to risk management, process control and countermeasures. At next the procurement process is explained and possible risks or failures are collected by a failure mode and effects analysis. As suitable preventive actions, methods like flow chart, visualization of a supply chain, risk assessment by forms and brainstorming are explained.
Lastly, planned modifications of the DIN EN 9100:2016 standard is described and an outlook shows, in which way a procurement process can be influenced by the approach of industry 4.0.

Title: "Design, dimensioning and technical execution of a device to manufacture resin specimen for a new kind of test method for fibre-reinforced composites"
Author: Daniel Pohlner
University: HAW Hamburg
Type: Bachelor Thesis
Date: 12.2016

The thesis is part of a project which has the objective of developing a new testing method to estimate the remaining residual service lifespan of reinforced fibre materials. The main objective of the bachelor thesis is to develop and create a casting device to manufacture resin specimen for a new testing method.

The particularity of the resin samples produced is an omitted defect. This defect is to be used in later tests on a specially developed test rig to determine whether the defect can be compensated by temperature changes in the material during cyclic loading with thermographic real-time monitoring and data acquisition.

The epoxy resin used is a component of the matrix of carbon fiber reinforced components. In order to be able to examine CFRP components for defects with the same method, these tests are classified as basic tests in order to be able to draw conclusions and conclusions about material behavior and possible component damage during subsequent tests of CFK samples.

For CFRP components, there are not yet sufficiently accurate methods for defect detection. If the project is successfully carried out, the remaining life of safety-related components, such as for example Turbine blades are better assessed with the test stand and the components do not have to be prematurely replaced.

For the development and solution of the device, the methods of the morphological box and the design thinking method were used to achieve an effective solution. Individual parts and prototypes have been made using the Fused Deposition Modeling method. In this way, long production times were circumvented by non-tested parts and could be adjusted and re-established at short notice.

The empirical use of various tools for sample preparation has resulted in a useful result.

Title: "Construction and visualization of a specimen casing on a dynamic testing facility to carry out infrared and deformation measurements"
Author: Benjamin Krützberg
University: HAW Hamburg
Type: Bachelor Thesis
Date: 05.2015
The current methods for assessment and control of reinforced plastics are very complex and expensive. Especially in times of rising popularity of components made of CFRP, there is a growing demand for alternative methods which are simpler and cheaper than the status quo, while remaining as reliable. One method is concerned with the detection of defects by the increase in temperature and deformation in non-destructive dynamic loading. The infrared radiation of the specimen is taken by a camera here and represented in a temperature curve. Content of this report is the development of a test bed for the implementation of infrared and deformation recordings. The influence of environmental conditions is considered and reduced by the construction of an enclosure. All the component elements and compounds are designed to dynamic loading. On the basis of a given test bed model the casing will be constructed with the CAD system CATIA V5 R21 and then be verified by a stress analysis in static and in frequency domain.

Title: "Design and construction of a test bed for thermal and mechanical analysis and testing of aircraft cables"
Author: Alexander Happe
University: HAW Hamburg
Type: Bachelor Thesis
Date: 08.2014
As part of the development of large civil aircraft, power systems with high levels of voltage (± 270VDC) are investigated.
As part of a research project, the properties of power cables for transmission of high voltage levels should be inspected and - if possible - be improved. The maximum static and dynamic loads from the so-called windmilling load case are considered for defining the corresponding test cases. This work includes the design and construction of a pneumatically operated test bench for investigation and examination of the characteristics of electrical aircraft cables. The cable should be embedded as realistically as possible in the test environment. The development process is carried out in accordance with VDI guidelines

Title: "Certification of safety-critical systems – using the example of alternative energy technology in the aviation "
Author: Jacqueline Bubos
University: TH Wildau
Type: Master Thesis
Date: 03.2013
This master’s thesis documents the investigation of the multifunctional fuel cell to achieve the “ACRAE”-objectives in the area environment and safety. Certification of the airplane, including the fuel cell, must be done to ensure the safety of the environment and the passengers.
This thesis researches which safety requirements are required to certify a safety-critical system such as the fuel cell for the aviation industry. The result is that the certification requirements of the EASA for a civil aircraft (CS 25.1309) are applicable for the integration of the multifunctional fuel cell. A new rule type does not need to be created for the approval of a new aircraft including the system. The proof of compliance with the airworthiness requirements of the aviation authority can be carried out based on the SAE ARP 4761 “Guidelines and methods for conducting the safety assessment process on civil airborne systems and equipment”.
A functional hazard analysis was performed to identify and classify failure conditions of those functions according to their severity. The result showed that the fuel cell can be a hazard to a small extent. Hazardous impact damage may be produced only by the discharge of hydrogen, because it generates an explosive hydrogen-air mixture. For this reason, the hydrogen tank is one of the greatest sources of danger. A safe design of the fuel cell system must be considered in the next steps of the safety process.

Title: "Certification of Hybrid Aircraft"
Author: Firat Ilkay
University: HAW Hamburg
Type: Master Thesis
Date: 03.2013
In this thesis, a new hybrid aircraft series is analyzed and evaluated based on the certification specifications (CS) of EASA.The aircraft combines the techniques of the helicopters, the wing airplanes, airships and hovercrafts comprising all the advantages and features of those carrier devices. The aim of this thesis is the identification of CS rules for certification and examining the requirements . In addition, there is a Particular Risk Analysis (PRA) for the central propeller according to ARP 4754-guideline. The analysis is done by Uncontained Engine Failure (UERF) in order to determine the effects of the bursting on the aircraft and the passengers.

Author: Antonio Fernandez Ameneiro
University: Alfonso X el Sabio University (UAX)in cooperation with Fairleigh Dickinson University
Type: Master Thesis
Date: 09.2012
This project is part of the Autonomous Vehicle Project developed in the School of Computer Sciences and Engineering of Fairleigh Dickinson University, New Jersey. The main objective of this project has been to develop a steering control system for an Autonomous Vehicle, so it could be able to perform all driving operations safely, without any human interaction. It should also allow the driver to take control over the vehicle in case of any emergency or system failure. This system has been specifically designed to be implemented on a Powerwheels Fisher Price-Jeep™ scale model for test purposes, as a first milestone for a future full-size vehicle adaptation. Several sensors have been installed in the test vehicle in order to obtain inputs from the road and its surrounding area. A PC has also been installed as a control and processing unit for all vehicle systems. Software has been programed in the FDU Robotics Laboratory and installed on the PC for that matter. Electromechanical actuators have been designed and installed to take control over the vehicle steering mechanism. A preliminary design for full-size vehicle adaptation of the system has also been detailed, along with next possible steps to be taken for the design process. In the Project Report, a brief explanation about the current status of the Automobile Industry regarding Autonomous Vehicle Technologies and its legal and safety issues has also been included.

Title: "Evaluation and validation of core processes and optimization of the corresponding process instructions for a quality management system in accordance with DIN EN 9100:2010"
Author: Robert Buchholz
University: University of Applied Science Wildau
Type: Bachelor Thesis
Date: 16.06.2011
The bachelor thesis paper includes the evaluation of core processes and the evaluation of corresponding process instructions. As a result, the core processes of systems engineering and computer-aided engineering have been reworked corresponding to their actual content. Optimized process instructions have been created. To improve their property as work-descriptions, they were extended by flowcharts and descriptions. The new layout allows an quick overview of the core processes and serves as a detailed process-documentation, as requested in the DIN EN 9100:2010.

Title: "Alternative fuels and drive systems in aviation and their influence on infrastructure of airfields"
Author: Oliver Kirst
University: University of Applied Science Wildau 
Type: Master Thesis 
Date: 16.06.2011
This research paper deals with alternative fuels and drive systems in aviation and their influence on infrastructure of airfields. For this purpose the different types of currently realistic technologies got analyzed and compared to each other. Therefore this paper deals with the topic of liquefied gas and its use in aviation in detail.

Title: "Cost calculation using the example of the Company QualityPark AviationCenter GmbH as a supplier for Airbus"
Author: Roman Geißler 
University: University of Applied Science Mittweida
Type: Diploma Thesis 
Date: 31.08.2009

Title: "Creation of a Quality Management System for the Company QualityPark AviationCenter GmbH"
Author: F. Setzer
Type: Master Thesis
Date: 31.08.2009

Title: "Cabin Interior for a Super-Sonic Business Jet (SSBJ)"
Author: Avdi Shala
Type: Master Thesis
Date: 23.06.2009

Title: "Modelling, simulation and control of a hydraulic servo mechanism "
Author: Achille Nguegnia Yinga
Type: Diploma Thesis
Date: 31.03.2009

Title: "Design of a cargo trailer chassis"
Author: Vitaliy Aliyev
Type: Diploma Thesis
Date: 09.01.2009

Title: "Development of a Freely Configurable, Modular Equipment Rack for the Installation of Cabin Control Units"
Author: Alexander Ruppel
University: University of Applied Science Hamburg
Type: Diploma Thesis
Date: 26.08.2008

Title: "The Modeling and Simulation of Aircraft Engines for the Reduction of CO2 & NOx Emissions"
Author: A. Ngankou
University: University of Applied Science Hamburg
Type: Diploma Thesis
Date: 29.02.2008
Bleed air and wave power is taken from the engines to power for example, the fuel pump to generate the in-flight entertainment or Flügelvorderkantenenteisung. This energy generation, has an increase in fuel consumption and emissions result. It turns out that the place has the air bleed a strong influence on the gradient of the fuel consumption. The thesis deals with a turbofan what one studies, the effects of benefit withdrawals. As simulation software Matlab / Simulink 6.0 were used. The aim of this work is to determine a mathematical relationship to calculate the additional fuel mass flow due to a bleed air or wave power extraction.

Title: "Analysis of Systematic Wiring Methods in Aircraft Cabins using Cable Conduits"
Author: W. Breidenbücher
Type: Diploma Thesis
Date: 08.02.2008

Title: "Concept Development for a Flexible Electrical Connection for Cabin Modules"
Author: M. Smadi
Type: Diploma Thesis
Date: 25.07.2007

Title: "Integration of Customer-specific Electrical Supply for Cabin Equipment in the BWB Configuration
Author: D. Krychmar
Type: Diploma Thesis
Date: 07.05.2007

Title: "Cabin Electrical Installation for BWB Aircraft"
Author: Prof. W. Granzeier, O. Zysk, T. Liesk
Type: Publication at CEAS 2007
Date: 12.09.2007
The paper presents a conceptual study for the electrical cabin installation in the VELA2 Blended Wing Body aircraft. The increasing amount of cabin configuration options together with the complexity of the requirements for the electrical installation lead to a time–consuming and costly customization process for modern passenger aircraft. The goal of this concept is to allow a quick and cost–efficient adaptation of the electrical cabin installation to the respective customer layout of a Blended Wing Body aircraft. This is made possible through the introduction of cabin main routes that cover a large majority of all cabin relevant electrical bundles. An analysis is performed to identify the main cost drivers for the cabin electrical harness installation. The majority of these use similar route paths, which have been grouped to minimize the amount of harness paths required. To cover the routings required to supply the controlling equipment and the majority of the customized routings, predefined route paths are used. Route path definition is also performed along all of the monument flexible zones, so that any monument position inside of the flex zone can be connected without further effort.
Title: "Integration of ATA92 Systems into a Blended Wing Body Configuration"
Author: André Schmidt
Type: Master Thesis
Date: 08.12.2006
The paper presents an integration concept of ATA92 "Electrical and Electronic Common Installation" onboard the VELA2 Blended Wing Body configuration. The main electrical route classes of common large civil transport A/C are identified and adapted to VELA2's unique geometry. The layout proposal is done utilizing the System Integration Layout process and the software tool IRIS. It is checked for conformity with regulations of the airworthiness authorities and other (functional, safety, maintenance...) requirements. Particular risk analysis is performed to demonstrate the system's safety.
Title: "Integration von Kabinensystemen in BWB-Flugzeugkonfigurationen" - "Integration of Cabin Systems into BWB Aircraft"
Author: Max Mahnken
Type: Diploma Thesis
Date: 12.01.2006
The VELA "Very Efficient Large Aircraft" project is a first step in the development of a transport aircraft which should strengthen and expand Europe's market position in the next 30 through 50 years. Aerodynamics, flight mechanics, structures and issues like cabin layout, evacuation and passenger acceptance have been investigated up to now. With this preliminary design study data concepts of the aircraft systems to be integrated are created, in order to investigate effects on the structure, the cabin and other systems. This type of approach makes it possible to create initial integration solutions which fulfill requirements set by structure, interior and systems. In a first step space allocations are made for devices and components of the air conditioning, fire detection and suppression, oxygen, water and waste water as well as the bleed air systems. Clashes between devices and ducts are eliminated as far as possible. At the same time it is checked if the system requirements are met. Conventional concepts are compared to (VELA) adapted solutions. Problems manifest upon conventional positioning of air conditioning mixing units, fresh water tanks and bleed air ducts between the port and starboard sides of the aircraft. Important requirements for the duct installation cannot be met. The adapted alternatives lead to a positioning of the mixing units above the cabin roof. The free space in the bilge is used for water tank integration. The concepts created identify the sensitive areas namely the connections between air generation unit and mixer as well as the fresh and gray water networks. The system models provided in this paper can serve as a basis for succeeding integration studies.
Title: "Simulation der Temperaturregelung von Flugzeugklimaanlagen" – "Simulation of Temperature Control in Aircraft Air Conditioners"
Author: Mark Schmidt
Type: Diploma Thesis
Date: 12.10.2005
The diploma thesis paper describes selected air conditioning system for airplanes. It focuses on the system part of the air supply of air conditioners. In new system designs the air is not supplied by the conventional method of bleeding air off the engine compressors. Power compressors take over the workload of pressurizing the air. This philosophy promises economic and reliability advantages as well as mass reductions. The analysis of this thesis is done by simulating the effected systems with MatLab/Simulink and subsequently calculating costs. Especially the calculation of fuel mileage of bleed-less air conditioners per long range aircraft promises cost savings. Other factors, such as mass savings, turn out rather disappoint results, e.g.. The new Boeing 787, which is currently in development, is expected to yield exciting data for comparison. This aircraft is supposed to apply the discussed air conditioning concept for the first time.

Brandenburg Stipendium:


In the time frame between 1.9.2013 to 31.1.2015 Lukas Nagel was working as student team member, where the period from 1.9.2013 to 28.2.2014 was sponsored by Brandenburg Stipendium. During this period he was working on the Aircraft Simulation with a focus on the Cockpit indications on PFD, EWD and SD (ATA31).