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Entwicklung eines Regelungsverfahrens zur Pfadverfolgung für ein Modellfahrzeug mit Sattelanhänger
(2009)
Besides the progressive automation of internal goods traffic, there is an important area that should also be considered. This area is the carriage of goods in selected external areas. The use of driverless trucks in logistic centers can report economic efficiency. In particular, these precise control procedures require that trucks drive on predetermined paths. The general aim of this work is the adaption and evaluation of a path following control method for articulated vehicles. The differences in the kinematic behavior between trucks with one-axle trailer and semi-trailer vehicles will be emphasized. Additionally, the characteristic kinematic properties of semi-trailers for the adaptation of a control procedure will be considered. This control procedure was initially designed for trucks with one-axle trailer. It must work in forwards and backwards movements. This control process will be integrated as a closed component on the control software of the model vehicle. Thus, the geometry of the model vehicle will be specified, and the possible special cases of the control process will be discovered. The work also documents the most relevant software components of the implemented control process.
The STOR project aims at the development of a scientific component system employing models and knowledge for object recognition in images. This interim report elaborates on the requirements for such a component system, structures the application area by identifying a large set of basic operations, and shows how a set of appropriate data structures and components can be derived. A small case studies exemplifies the approach.
In recent years, traceability has been more and more universally accepted as being a key factor for the success of software development projects. However, the multitude of different, not well-integrated taxonomies, approaches and technologies impedes the application of traceability techniques in practice. This paper presents a comprehensive view on traceability, pertaining to the whole software development process. Based on graph technology, it derives a seamless approach which combines all activities related to traceability information, namely definition, recording, identification, maintenance, retrieval, and utilization in one single conceptual framework. The presented approach is validated in the context of the ReDSeeDS-project aiming at requirements-based software reuse.
Probability propagation nets
(2008)
This work introduces a Petri net representation for the propagation of probabilities and likelihoods, which can be applied to probabilistic Horn abduction, fault trees, and Bayesian networks. These so-called "probability propagation nets" increase the transparency of propagation processes by integrating structural and dynamical aspects into one homogeneous representation. It is shown by means of popular examples that probability propagation nets improve the understanding of propagation processes - especially with respect to the Bayesian propagation algorithms - and thus are well suited for the analysis and diagnosis of probabilistic models. Representing fault trees with probability propagation nets transfers these possibilities to the modeling of technical systems.