Fachbereich Ingenieurwissenschaften und Kommunikation
Refine
H-BRS Bibliography
- yes (235)
Departments, institutes and facilities
- Fachbereich Ingenieurwissenschaften und Kommunikation (235)
- Institut für Technik, Ressourcenschonung und Energieeffizienz (TREE) (150)
- Internationales Zentrum für Nachhaltige Entwicklung (IZNE) (30)
- Institute of Visual Computing (IVC) (25)
- Fachbereich Informatik (24)
- Zentrum für Innovation und Entwicklung in der Lehre (ZIEL) (18)
- Fachbereich Wirtschaftswissenschaften (5)
- Fachbereich Angewandte Naturwissenschaften (2)
- Institut für Sicherheitsforschung (ISF) (2)
- Bibliothek (1)
Document Type
- Conference Object (235) (remove)
Year of publication
Keywords
- FPGA (9)
- Education (5)
- advanced applications (4)
- digital design (4)
- e-learning (4)
- education (4)
- Applications in Energy Transport (3)
- Complex Systems Modeling and Simulation (3)
- Non-linear systems (3)
- efficiency (3)
The proper use of protective hoods on panel saws should reliably prevent severe injuries from (hand) contact with the blade or material kickbacks. It also should minimize long-term lung damages from fine-particle pollution. To achieve both purposes the hood must be adjusted properly by the operator for each workpiece to fit its height. After a work process is finished, the hood must be lowered down completely to the bench. Unfortunately, in practice the protective hood is fixed at a high position for most of the work time and herein loses its safety features. A system for an automatic height adjustment of the hood would increase comfort and safety. If the system can distinguish between workpieces and skin reliably, it furthermore will reduce occupational hazards for panel saw users. A functional demonstrator of such a system has been designed and implemented to show the feasibility of this approach. A specific optical sensor system is used to observe a point on the extended cut axis in front of the blade. The sensor determines the surface material reliably and measures the distance to the workpiece surface simultaneously. If the distance changes because of a workpiece fed to the machine, the control unit will set the motor-adjusted hood to the correct height. If the sensor detects skin, the hood will not be moved. In addition a camera observes the area under the hood. If there are no workpieces or offcuts left under the hood, it will be lowered back to the default position.
Solving transport network problems can be complicated by non-linear effects. In the particular case of gas transport networks, the most complex non-linear elements are compressors and their drives. They are described by a system of equations, composed of a piecewise linear ‘free’ model for the control logic and a non-linear ‘advanced’ model for calibrated characteristics of the compressor. For all element equations, certain stability criteria must be fulfilled, providing the absence of folds in associated system mapping. In this paper, we consider a transformation (warping) of a system from the space of calibration parameters to the space of transport variables, satisfying these criteria. The algorithm drastically improves stability of the network solver. Numerous tests on realistic networks show that nearly 100% convergence rate of the solver is achieved with this approach.