The passive security systems protect the passengers when the car has an important accident. These systems are based in a good and strength car structure to not deform the passenger cabin. In Gestamp Hardtech are producing pieces with an important strength without increasing the car weight. These pieces are produced using the hot stamping process [...]
Biomass- and coke oven gas based methanol production
This study considers production of methanol as a motor fuel, generated from coke oven gas at the steel mill SSAB Tunnplåt in Luleå. In addition, different systems with a biomass gasification plant included are considered. The produced synthesis gas is mixed with the coke oven gas to enhance the methanol production. Different technologies for production [...]
Development of design guidelines for underground platinum mine regional support pillars
Assessment of pillar stability is one of the most crucial steps in mine design (Sjöberg, 1992). South African platinum mines has reached a point where layouts made for shallow operations are insufficient due to increased depth, creating a necessity for new design layouts for medium depth mines (>1000 m). In this thesis, a design criterion [...]
Study of the reactions between iron ore slag and refractories
For the fabrication of iron ore pellets at LKAB (Luossavaara-Kiirunavaara AB), one of the methods used is to sinter the pellets in a rotary kiln. This Kiln has a drift temperature of 1250°C in average. During this process a coating, causing the wear of the refractories materials, is formed, inducing expensive maintenance periods. The aim [...]
Principal component analysis of T-waves
The mechanical work of the heart is triggered by electrical activity in the muscle fibres. The potentials from individual muscle fibres interfere with each other to produce an electrical field which can be examined by recording potential differences on the body surface with an electrocardiogram (ECG). An ECG contains several wave- components, each describing one [...]
Multi objective optimization and probabilistic design on aircraft fuel system
The fuel system in an aircraft is the largest and the most important system. Designing a fuel system puts large demands on the engineers and therefore a computer software (a quantified morphological matrix) has been developed by Saab Aerosystems. The software is used as synthesis help during the conceptual phase and helps the designer to [...]
Improved aero blade design for multi-disciplinary integration
Robust design and reduced lead-time are key issues in the general field of product development today. The meaning of KEE (Knowledge Enabled Engineering) can be generalized as a process to customize computer aided engineering systems to reduce the lead time for routine engineering work as well as securing the design “know-how” for specific components. As [...]
Improved stability analysis of rocket engine nozzles
This master’s thesis was conducted at Volvo Aero Corporation (VAC) in Trollhättan at the department of combustion chambers and nozzles. This department is responsible for the development of the main engine nozzle extension to the European Ariane 5 rocket. During space flight there are a variety of loads which may cause structural instability in the [...]