Klaus-Peter Neitzke

• Professor (Full) at Nordhausen University of Applied Sciences

The paper describes the structure of a wireless sensor network. This is able to measure, transmit and store field sensor data from a rural environment. The data are stored at a web server and they are available on a web page. LoRa transceivers are responsible for the transfer of the data from the sensor to the gateway. This allows long distances bu...

The paper describes the structure of an ad hoc communication system witch allows to collect, transport and write field sensor data from a rural environment into the internet. The data are stored at a web server and can be read on a web page. The data are transported by LoRa transceivers witch allows long distances at low data rates. The field data...

Assessment of non-functional reliability and safety requirements in the early development phases helps to prevent conceptually wrong decisions and, as a consequence, significantly reduces overall development costs. The application of model-based system analysis techniques demonstrates promising results for complex avionics systems, especially softw...

A failure in the behavior of safety-critical systems such as Unmanned Aerial Vehicles (UAV) may lead to hazards and serious consequences. Therefore UAVs must perform correctly throughout their intended life cycle. However, the functional system specification is not sufficient to ensure proper performance. The assessment of non-functional reliabilit...

Assessment of non-functional reliability and safety requirements in the early development phases helps to prevent conceptually wrong decisions and, as a consequence, significantly reduces overall development costs. The application of model-based system analysis techniques demonstrates promising results for complex avionics systems, especially softw...

The IMUFUSION project was one of seven BEXUS experiments carried in two BEXUS balloons launched in 2018. BEXUS balloons are lifted to a maximum altitude of 30 km, depending on total payload, with a flight duration of about five hours. The idea was to calculate the trajectory of the balloon within the BEXUS campaign with the help of an Inertial Meas...

Model-based systems engineering approaches are commonly used to develop safety-critical mechatronic systems. Recently, a new SysML-based method for the dependability analysis of Unmanned Aerial Vehicles (UAVs) has been introduced. The method consists of three main steps: (i) creation of a structural SysML model using building blocks from the underl...

Model-based systems engineering approaches are commonly used for the development of various heterogeneous mechatronic systems including nowadays popular Unmanned Aerial Vehicles (UAV). As a rule, the dependability analysis is carried out during the system integration phase of the UAV development. Therefore, fundamental design drawbacks might be unc...

This paper describes a family of innovative fixed wing UAS with can vertical take off and land – the SONGBIRD family. With nominal payloads starting from 0.5 kg they can take off and land safely like a multi-rotor UAV, removing the need for an airstrip for the critical phases of operation. A specially designed flight controller allows stable flight...

The present invention provides a method and a system for determining forces which act on a body with a controlled volume which is provided inside the flow tunnel and in which the body is arranged. A first measuring means is used to measure a pressure distribution for each surface defining the controlled volume. A second measuring means measures a v...

Contrarotating open rotor propulsion systems have seen renewed interest as a possible economic and environmentally friendly powerplant for future transport aircraft. While the potential efficiency benefits are well accepted, concerns persist regarding the probable rotor-to-rotor interaction-driven noise penalty this type of engine would have in com...

Counter rotating open rotor (CROR) propulsive systems are again considered as fuel efficient alternatives to conventional propulsion systems. In the present paper details of dedicated experiments on a generic CROR model are studied using stereoscopic Particle Image Velocimetry. The CROR model has 10 front blades and 8 aft blades, with blade design...

This article describes the two accompanying fluid dynamics videos for the "Counter rotating open rotor flow field investigation using stereoscopic Particle Image Velocimetry" presented at the 64th Annual Meeting of the APS Division of Fluid Dynamics in Baltimore, Maryland, November 20-22, 2011.

Currently counter rotating open rotor (CROR) propulsion systems are again considered as viable alternatives to conventional propulsion systems. This paper contributes to the resurgence of CROR concepts and contains details of an experimental and numerical concept study on a generic CROR model. This model has 10 front blades and 8 aft blades, with b...

Counter rotating open rotor (CROR) propulsive systems are again considered as fuel efficient alternatives to conventional propulsion systems. In the present paper details of dedicated experiments on a generic CROR model are studied using stereoscopic Particle Image Velocimetry. The CROR model has 10 front blades and 8 aft blades, with blade design...

Stereo PIV measurements have been performed in 5 cross - flow planes along the trajectory of the strake wake vortex above the suction surface of the KH3Y wing. The measurement planes were oriented in a model - fixed coordinate system perpendicular to the mean flow direction at α = 0° and tilting with the angle of incidence. A tower - like traverse...

In this overview the measurement techniques and results gained in the project EUROLIFT II will be presented. A realistic transport aircraft configuration was measured with the measurement techniques force measurements, moment measurements, pressure distribution measurements, oil-flow visualization, Infra Red (IR) imaging and Particle Image Velocime...

The numerical simulation of the flowfield around a whole high-lift element with deployed slat and flap is a problem of outstanding importance. Additionally, environmental concerns require substantial reductions in noise and emission prediction. Therefore, research activities have been intensified over the last years including both numerical and exp...

Within the framework of the European Union's EUROPIV-2 programme, experiments using Particle Image Velocimetry (PIV) were performed in the low-speed wind tunnel of Airbus Bremen, Germany. The goal was to investigate the flow over a two-dimensional, slat/wing/flap model in a high-lift configuration. For this, a system for acquiring PIV data from mul...

Experiments using multi-window, particle image velocimetry (PIV) were performed in the low-speed wind tunnel of Airbus Bremen, Germany, over a two-dimensional, slat/wing/flap model in a high-lift configuration. For this, a system for acquiring PIV data from multiple cameras simultaneously was devised and installed underneath the LSWT. The PIV exper...

Weiterentwickelte PIV-Methode zur räumlich und zeitlich korrelierten Untersuchung von Strömungen. Anwendung auf Hochauftriebskonfigurationen, insbesondere zur Erfassung von turbulenten Umschlägen, Ablösungen, Rezirkulationsbereichen und Nachläufen.

Es wurde eine Übersicht über den Tau-Code gegeben. Den Zuhörern wurden die einzelnen Module wie: Preprocessing, Flow-Solver und Adaptation vorgestellt. Einen weiteren Schwerpunkt bildete der Überblick über bereits durchgeführte Stroemungsberechnungen. Im Anschluss wurde auf Ideen fuer die weitere Entwicklung und die Qualitätssicherung des Tau-Codes...