References of "Automatisierungstechnik"
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See detailLTI Modell arbiträrer wechselrichtergeführter Inselnetze
Jostock, Markus UL; Sachau, Jürgen UL; Tuttas, Christian

in Automatisierungstechnik (2013), 61(12), 818-830

This paper presents the development of a control model for inverter driven island grids. The herein presented structured approach creates a multi voltage source inverter model from a single inverter state ... [more ▼]

This paper presents the development of a control model for inverter driven island grids. The herein presented structured approach creates a multi voltage source inverter model from a single inverter state space model and combines this with the node incidence matrix of a network into a compound model of an island grid. The presented approach allows to analyse arbitrary grid structures and different inverter models and it incorporates a large number of inverters. The model can be particularly used for ohmic-inductive low voltage lines. At the end of the article, a stability analysis of a sample network is presented. [less ▲]

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See detailEntwurf eines Flugreglers für ein vierrotoriges unbemanntes Fluggerät - Control Systems Design for a Quadrotor UAV
Voos, Holger UL

in Automatisierungstechnik (2009), 57(9), 423-431

This paper describes the design of a nonlinear control system for a small four-rotor aerial robot, a so called quadrotor UAV (unmanned aerial vehicle). Stabilizing control of these vehicles is a difficult ... [more ▼]

This paper describes the design of a nonlinear control system for a small four-rotor aerial robot, a so called quadrotor UAV (unmanned aerial vehicle). Stabilizing control of these vehicles is a difficult task because of the nonlinear dynamic behavior. The proposed control system is based on a decomposition into an inner attitude and an outer velocity control loop. For the attitude control, feedback linearization is applied that transforms the system into a decoupled linear system in state variable format. This resulting system is controlled via a conventional linear controller, leading to a sufficiently fast and damped closed loop dynamics. The outer control loop applies a nonlinear inversion to compensate a static nonlinearity and a linear control system to control the remaining linear dynamics. The advantage of the derived control system besides the excellent performance is the simple structure and the easy implementation. [less ▲]

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See detailAnalyse der evolutiven Adaptation am Beispiel einer pyruvat-auxotrophen Escherichia coli-Mutante
Feuer, Ronny; Ederer, Michael; Gilles, Ernst Dieter et al

in Automatisierungstechnik (2008), 56

The biotechnological production of substances with help of microorganisms is an economically important application of systems biology. In this paper a pyruvate-auxotrophic Escherichia coli-strain is ... [more ▼]

The biotechnological production of substances with help of microorganisms is an economically important application of systems biology. In this paper a pyruvate-auxotrophic Escherichia coli-strain is utilized in order to activate alternative pyruvate synthesis pathways via evolutive adaptation. The outcome of the chemostat experiments are pyruvateprototrophic strains. Due to the activated alternative synthesis pathways, these strains are a basis for future industrial production-strains in order to systematically produce the intermediate products on these pathways. By means of a simple dynamical model of a chemostat, the evolutive adaptation in chemostat mode is studied. Rules to adjust the feeding concentration and the dilution rate of the bioreactor could be obtained in order to accelerate the evolutive adaptation towards a pyruvate-prototrophic strain. A flux balance analysis of the metabolic network of the pyruvate-auxotrophic strain results in 20 different alternative pathways. For a well arranged presentation of those pathways a reduced visualization method is introduced. [less ▲]

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See detailNeuroIdentifier: Tool zur Identifikation dynamischer Systeme mit neuronalen Netzen
Habtom, Ressom; Voos, Holger UL; Litz, Lothar

in Automatisierungstechnik (1999), 47(4), 181-182

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