State-of-the-practice in quality assurance in Java-based open source software development

To ensure the quality of software systems, software engineers can make use of a variety of quality assurance approaches, for example, software testing, modern code review, automated static analysis, and build automation. Each of these quality assurance practices have been studied in depth in isolation, but there is a clear knowledge gap when...

ClimAIte Control: Improving Building Operation Through AI

Current building operations can be improved through smart predictive operation based on weather and use patterns in order to save energy with minimal impact on the building fabric and daily use. The existing literature has investigated implementations, and potential savings through combining with variable tariffs, however, this thesis addresses...

ThinkingSkins: Cyber-physical systems as foundation for intelligent adaptive façades

New technologies and automation concepts emerge in the digitalization of our environment. This is, for example, reflected by intelligent production systems in Industry 4.0. A core aspect of such systems is their cyber-physical implementation, which aims to increase productivity and flexibility through embedded computing capacities and the...

Automated adaptive façade functions in practice: Case studies on office buildings

The study examines the existing technical basis in building practice for the application of cyber-physical systems on the façade. The associated intelligent cooperation of automated adaptive façade functions, inspired by intelligent technical systems in industry 4.0, offers a potential for the overall building performance. By the type and...

Prototype of a cyber-physical façade system

This research examines the technical feasibility of façades as cyber-physical systems, which can revolutionize former hierarchical and closed automation concepts of mechatronics through their cooperation of decentralized entities. While such systems are already employed in many application fields to increase the flexibility and performance of...

Scenario-based model predictive control approach for heating systems in an office building

In the context of building heating systems control in office buildings, the current state-of-the-art applies either a deterministic Model Predictive Control (MPC) controller together with a nonlinear model, or a linearized model with a stochastic MPC controller. Deterministic MPC considers only one realization of the external disturbances,...

A message passing algorithm for automatic synthesis of probabilistic fault detectors from building automation ontologies

Model-based fault diagnosis has been indicated as a fundamental method in enabling optimal maintenance of buildings, thus leading to important energy savings. However, accurate models of buildings and their technical equipment are seldom available, and this lack of knowledge applies even more to descriptions of modeling and measurement...

Secure Control Applications in Smart Homes and Buildings

With today’s ongoing integration of heterogeneous building automation systems, increased comfort, energy efficiency, improved building management, sustainability as well as advanced applications such as active & assisted living scenarios become possible. These smart homes and buildings are implemented as decentralized systems, where embedded...

A Robust Setpoint Based Heartbeat Solution for Unreliable IEEE 802.15.4 WSANs

Wireless sensor and actuator networks (WSANs) suffer from interference making them unfeasible for actuators that require reliability. This asks for an IEEE 802.15.4 behavior analysis for building automation actuators and a robust WSAN solution. This thesis uses the IEEE 802.15.4 based JenNet communication stack for experiments to define, measure...