Optimized operation of the administrative buildings of Nordkraft Eiendom

Ensuring the long-term stability of a gravity-tractor spacecraft near a binary asteroid demands guidance laws that can withstand the nonlinear, multi-body dynamics and uncertainties of space. We derive and compare three controllers the PD+, the LQR, and a High-Order Sliding-Mode Controller (HOSMC) with super-twisting, for both a two-body approximation and the full circular restricted three-body ...

A new type of emergency parachute system is developed using engineering, combining off-the-shelf components with parts produced with additive manufacturing. A new ultralight method for retaining the the parachute and lid using as thin line is developed and tested, An ultralight redundant trigger mechanism with health monitoring to ensure reliable triggering is also developed and tested. Parts ...

Floating closed containment fish farms are highly susceptible to severe sloshing due to their large proportion of internal liquid mass. The coupled fluid-structure interaction is shown to be affected by the presence of internal liquid as the rigid body motion of a closed containment fish farm is subject of sloshing analysis through CFD simulations applying external wave loads. The simulations ...

This thesis presents a comprehensive finite element analysis (FEA) of the Skattørsund Bridge, a concrete slab bridge in Norway, using shell-based modeling techniques. The study aims to evaluate the bridge's structural behavior under static and dynamic loads, including traffic, environmental factors, and natural hazards, to ensure its long-term safety and performance. The research leverages the Finite ...

Over the years, alkali activated materials (AAM) have gained interest as a sustainable alternative to conventional concrete made with ordinary Portland cement (OPC) as OPC production is a major contributor to CO₂ emissions in the construction sector. The need of concrete in the construction sector continues to grow, and therefore, the environmental impact is a legitimate concern. AAM-concrete has ...

A particular laser harmonic with an effective combination of process parameters can break plastic bonds by surpassing the dissociation threshold. Exploring this direction is imperative to uncover new physics and chemistry related to laser-high-density polyethylene (HDPE) interactions and to understand the phenomena occurring during laser induced degradation. An experiment was conducted in an open-air ...

The application of cathodic protection (CP) gains increasing interest for maintaining the structural integrity of coastal concrete bridges facing premature degradation due to reinforcement corrosion. The present investigation was undertaken to obtain field experience on the long-term performance of impressed current cathodic protection (ICCP) installed on a Norwegian marine concrete bridge. Cores ...

In this paper, a model of a leader-follower spacecraft formation in six degrees of freedom is derived and presented. The nonlinear model describes the relative translational and rotational motion of the spacecraft, and extends previous work by providing a more complete factorization, together with detailed information about the matrices in the model. In addition, mathematical models of orbital ...

DC grid-forming converters are used to provide dc power distribution inside buildings. Often, such converters are based on dual-active bridge (DAB) technology to provide high-frequency isolation. Certain developing standards related to dc installations specify different isolation classes and protection zones. This is a critical requirement for power converter design, especially for building applications ...