A5090443322- Advanced Combustion Engine Technologies
- Real-time simulation and control systems
- Metal and Thin Film Mechanics
- Autonomous Vehicle Technology and Safety
- Vehicle Dynamics and Control Systems
- Mass Spectrometry Techniques and Applications
- Robotics and Sensor-Based Localization
- Combustion and Detonation Processes
- Scientific Measurement and Uncertainty Evaluation
- Robotic Path Planning Algorithms
- Additive Manufacturing and 3D Printing Technologies
- Particle accelerators and beam dynamics
- Electromagnetic Launch and Propulsion Technology
- High voltage insulation and dielectric phenomena
- Computational Fluid Dynamics and Aerodynamics
- High-pressure geophysics and materials
- Manufacturing Process and Optimization
- Diamond and Carbon-based Materials Research
- Combustion and flame dynamics
- Injection Molding Process and Properties
- Reinforcement Learning in Robotics
- Water Quality Monitoring and Analysis
- Currency Recognition and Detection
- Engine and Fuel Emissions
- Optimal Power Flow Distribution
Saarland University
1976-2023
Michigan State University
2009-2014
Clausthal University of Technology
2006
Universität der Bundeswehr München
1995-2003
Siemens (Germany)
1985-2003
Federal Highway and Transport Research Institute
2002
Technical University of Darmstadt
1999-2000
Optics Balzers (Germany)
1993
BASF (Germany)
1990
Oerlikon (Liechtenstein)
1990
The increasing demands for low emissions and fuel consumption in modern combustion engines require improved methods online diagnosis best possible control of the process. It is demonstrated that cylinder pressure signal can successfully be used this task. After introduction some theoretical background, several application examples are presented: an supervision injection, results on feedforward emission control, a concept feedback spark timing. Experimental obtained from stock car diesel...
The paper presents an algorithm to alleviate power system emergency conditions by network topology rescheduling. technique, based on sensitivity analysis, makes use of some practical simplifications. switching shunt elements is determined from the changes reactive injections that are necessary voltage violations. A relieving line sequence selecting and ranking possible switchable branches according effectiveness in alleviating overloads and/or has been simulated 24- 118-busbar systems.
Phenomenological investigations of water trees showed clearly that their formation can be inhibited by additives. Stabilizers for concentrated solutions H2O2 were found to particularly effective. Based on this observation, a model water-tree was postulated, which considers treeing essentially as an oxidative degradation with electrochemical initiation at defects and water/polymer interfaces. numerous additives inhibiting have been found, amongst them barbituric acid. This substance is...
Autonomous rides on public roads performed by a seeing road vehicle under normal traffic conditions have been demonstrated German Autobahnen since the beginning of 1992. Meanwhile, new goal autonomous driving lower order has approached including turn-off at intersections. Tests specially designed test track curves with radii from 35-100 m and an intersection. This paper gives short overview applied algorithms as well control structure system which was developed Universitat der Bundeswehr...
Chromium dioxide was introduced in the later 1960s as first magnetic material capable of high density recording. Since that time a continuous improvement properties has been made possible. The most recent concerns particles with coercivities well above 70 kA/m which can be prepared by modified hydrothermal process without using expensive Ir doping. Although CrO/sub 2/ somewhat higher specific magnetization, static and cobalt-modified iron oxides are comparable. There are, however, some...
Neural networks (NN) are gaining importance in sequential decision-making. Deep reinforcement learning (DRL), particular, is extremely successful action policies complex and dynamic environments. Despite this success, however, DRL technology not without its failures, especially safety-critical applications: (i) the training objective maximizes average rewards, which may disregard rare but critical situations hence lack local robustness; (ii) optimization objectives targeting safety typically...
A rotor system with double time delays supported by the high-speed self-acting gas-lubricated bearings three-axial grooves is modeled to implement active delay control of system. The differential transformation method employed solve time-dependent compressible gas Reynolds equation due its rapid convergence rate and minimal calculation error. Based on precise integration method, a proposed analyze dynamic responses bearing-rotor nonlinear delays. motion analysis implemented orbit diagrams,...
Chemical vapor deposited (CVD) diamond films of varying crystallographic orientations and sizes were thermochemically polished on steel plates. The the grains constituting used in this work ranged between 10 100 μm. Images surface morphologies obtained by scanning electron microscope (SEM) before after polishing. A stylus profilometer was to determine roughness (arithmetic mean deviation) as-grown films. average found be about 30 μm growth side 7 substrate side. Polishing for several hours...
By the example of turning right, it is shown how autonomous mobile robots obtain additional basic skills by implementing special behavioral patterns. Autonomy based on processing black and white monocular video image sequences in real time, supported 4-D approach for both vehicle state road recognition. This makes use recursive filter algorithms estimating variables. A feedback controller turns them into actuator signals, leading to reflex-like behavior. mode behavior extended here a...
Increasing demands of low emissions and fuel consumption modern spark ignition combustion engines require new ways for an optimal control the timing. Instead classical open-loop strategies cylinder pressure sensors are used adaptive point. A linear feedback controller is designed as well online neural feedforward controller, latter trained during regular operation, i.e. no test cycles required. The algorithms were implemented tested in a research automobile. Experimental results showed that...
For the metallization process of highly integrated semiconductors extremely low contamination levels are mandatory. In sputter atmosphere (up to 10−2 mbar argon) oxidizing agents like oxygen and water must be limited a few ppm. Mass spectrometric control overcome problems due high total pressure gas. Common differential pumping suffers from background interference setting detection limit more than 100 Past attempts for an effective discrimination method proved complex impracticable. recent...
Water-trees result when polyethylene (PE) or cross-linked (XLPE) is electrically stressed in a moist environment /l/. The experimental results do not present unified picture and the literature abounds with at times rather controversial regarding influence of electric field strength, frequency, type electrolyte, temperature insulating material. Apparently, initiation growth water-trees are complex processes which influenced, addition, by boundary conditions such as sample used, method...