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Due to the rising installed power of distributed regenerative energy sources and enhanced flexibility by the installation of local house batteries and battery electric vehicles, todays power grids are facing new challenges. In rural areas farmers are using their roof surfaces to harvest sun energy with photovoltaic cells. This leads to the fact, that small groups of houses may produce more power than...
Solar plants typically consist of several thousands of passive photovoltaic modules that are connected via thousands of string boxes to hundreds of inverters. In addition, a solar plant has meteo-sensors, power meters and control switches. All these components continuously generate data that is collected by monitoring systems or SCADA systems on-site. From there onwards, this data is pushed to remote...
We consider control of multiple luminaires with a central controller and occupancy and light sensors co-located at the luminaires. The sensors periodically provide local occupancy state and illumination information to the central controller. Using this sensor feedback, the central controller determines the dimming levels of the luminaires so as to adapt artificial light output to changing daylight...
Modeling complex mechatronic systems containing parts such as mechanics, electronics and software is a major challenge for the engineering of automation production systems. As a result, many modeling languages as well as tools (e.g. petri nets or MATLAB/Simulink) and verification approaches (e.g. testing, simulation or formal verification) that focus on special challenges to model the mechatronic...
Modern process plants are becoming more and more complex with high demands placed on design, engineering and operation. Throughout the life cycle of process plants, there is always the typical conflict involving costs, time and quality. One way of resolving this conflict is to employ simulation technology as it can be used to answer questions relating to engineering and operation earlier and with...
Occupancy analytics refers to statistical analysis related to occupancy of users in a building to derive information and insights based on which control and management of building systems may be improved. We consider the use of a wireless sensors infrastructure in a lighting system to derive occupancy analytics. Specifically, radio received signal strength indicator (RSSI) values at wireless motion...
This paper proposes a method to facilitate the identification process for a set of configuration parameters to achieve the optimal performance with respect to a benchmark program in HDFS in an automated manner. Performance optimization of Hadoop processes is a tedious yet challenging problem due to the complexity of the systems organization with an extensive list of configuration parameters to be...
The paper deals with the dynamic charging of the electric vehicles by an inductive power transfer (IPT) system with a segmented track. The reflexive properties of the IPT system is studied by evaluating the reactance of a transmitting coil when coupled with a pick-up with respect to uncoupled conditions. Different topologies for the pick-up circuit are evaluated, some of them introduced in this paper,...
The purpose of this paper is to describe the method used to calculate the Reliability and Availability estimations of the Uninterruptible Power Supply (UPS) systems using Monte-Carlo simulation method. In this method, the failure rates (λ), and availability (A) of the major components in the UPS are simulated by the use of random number generators. The main objective of this method is to produce,...
Secure indoor positioning is critical to successful adoption of location-based services in buildings. However, positioning based on off-the-air signal measurements is prone to various security threats. In this paper, we provide an overview of security threats encountered in such indoor positioning systems, and particularly focus on the relay threat. In a relay attack, a malicious entity may gain unauthorized...
Security by isolation is a longstanding, widely applied, and useful paradigm for achieving security goals such as data and code integrity, confidentiality, and availability. Security by isolation can be used to create Trusted Execution Environments. These environments provide specific security guarantees to the information processing taking place therein. In an Industrial Control System secure control...
Yarn quality prediction plays an important role in modern textile production management. Due to the nonlinearity and non-stationarity of yarn quality indicator series, the accuracy of the commonly used conventional methods, including regression analyses and artificial neural networks (ANN), has been limited. A prediction model based on support vector regression (SVR) is proposed in this paper to solve...
Bayesian networks (BNs) have been used in different contexts of decision support solutions such as directive, strategic, tactical and operational. These contexts differ from each other only in the realization of the decision support in terms of time. The real-time implementation of BN in an embedded system for resource optimization is very challenging because of the low computation capacity in embedded...
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