Influence of uncertainty on performance of opportunistic maintenance strategy for offshore wind farms

The increasing capacity of offshore wind energy around the world brings challenges in Operation and Maintenance (O&M) management. Over the past years, many studies have focused on developing sound maintenance strategies in order to minimize maintenance cost or maximize availability. One of the promising maintenance strategies is...

Examining pilot decision making in information-rich cockpits

Pilots are faced with making decisions based on a range of different information sources. One challenge pilots often face is the presentation of conflicting information between sources. This effort examined pilot decision making with conflicting information by conducting structured interviews with 13 pilots, including seven airline, three...

Designing military cockpits: To support a broad range of personnel body sizes

The Joint Primary Aircraft Training System (JPATS) body size cases provide aircraft designers access to representative Airmen anthropometric dimensions based on a database of air force personnel. To ensure new aircraft can support a broad range of pilot body sizes, designers can reference JPATS case numbers to assure adequate access to specific...

Effects of Verbal vs Graphical Weather Information on a Pilot’s: Decision Making during Preflight

Advancements in technology has made obtaining a graphical/textual preflight weather briefing easier than a traditional verbal briefing. This study compared weather briefings delivered in a verbal format (i.e., written narrative) to those delivered in a graphical format (i,e., radar map plus textual data) in a within-subjects study that altered...

Field Studies on the Axial Capacity of Small Diameter Piles and Ageing Effects in Sands

Comprehensive series’ of field pull-out tests have been carried out on small diameter (48 to 60mm outside diameter (OD)) open-ended steel driven piles at Larvik in Norway, Dunkirk in France and Blessington in Ireland to investigate the processes that affect the ageing of axially loaded piles in sand. This paper reports new investigations of the...

Improved cost of energy comparison of permanent magnet generators for large offshore wind turbines

This paper investigates geared and direct-drive permanent magnet generators for a typical offshore wind turbine, providing a detailed comparison of various wind turbine drivetrain configurations in order to minimise the Cost of Energy. The permanent magnet generator topologies considered include a direct-drive machine and single stage, two-stage...