Saab AB

About: Saab AB is a company organization based out in Thun, Switzerland. It is known for research contribution in the topics: Antenna (radio) & Signal. The organization has 862 authors who have published 928 publications receiving 8807 citations. The organization is also known as: Saab AB & Svenska Aeroplan AB.

Device and method for rotor blades

Abstract: The invention concerns a method and a device for a rotor blade for joining the rotor blade to a hub, wherein a fastening part (12) on the rotor blade comprises a composite material and is designed so as to enclose a connecting element on the hub. The invention is characterized in that the composite material is a fiber composite comprising a first set of fibers (14) that extends along the fastening part (12) in a direction that lies roughly within a range of +(10°-80°) relative to the longitudinal direction of the fastening part, and a second set of fibers (15) that extends along the fastening part in a direction within said interval, but with the fibers oriented at an angle relative to the longitudinal direction of the fastening part, which angle has the opposite sign vis-a-vis the first set of fibers. The fastening part thereby exhibits transverse contraction in the event of tensile loads on the blade with a component in the longitudinal direction of the fastening part, which imposes a clamping grip on the connecting element.

A method for determining a direction to a signal-emitting object

Abstract: The present invention relates to a method for determining a direction to a signal-emitting object by means of a platform comprising at least two antennas separated by a known distance. The method comprises said steps of: receiving, with each of said at least two antennas, a signal from said signal-emitting object at first positions, determining a first phase relation of said signal between said at least two antennas, - receiving, with each of said at least two antennas, a signal from said signal-emitting object at at least second positions, determining at least a second phase relation of said signal between said at least two antennas, characterised by the steps of: determining change(s) in position(s) of at least one antenna of said at least two antennas, and determining a direction to a signal-emitting object based on said first phase relation, said at least second phase relation and said change(s) in position(s) of said at least one antenna. The invention further relates to a platform performing a determination of a direction to a signal-emitting object.

An arrangement of components

Abstract: The present invention relates to an arrangement for transferring message based communications between separate disjunctive components, wherein the arrangement comprises at least two components, wherein at least a first component is arranged to provide services to at least one second component and/or to an operator of the loosely coupled system, at least one message bus arranged to perform real-time transfers of communications from/to the at least one first component to/from the at least one second component wherein the at least one message bus is connected to or integrated in an internal communication backbone arranged with means for establishing outgoing communication links, a predetermined message based interface arranged relative to each of the components and the at least one message bus such that all communications between the at least one first component and the at least one second component are defined in the same single standardized message language. The present invention further relates to a method for providing components in such an arrangement and a platform comprising such an arrangement.

Method for improving the accuracy of a radio based navigation system

Abstract: The invention relates to a method for improving the accuracy of a radio based navigation system by correcting the position given by the said radio based navigation system with a correction vector derived from localization data stored in a map database, where the correction vector is calculated by; (a) measuring the position coordinates of the radio based navigation system, (b) selecting based upon the measured position coordinates of the radio based navigation system position coordinates a set of 3D map data, (c) determining from the selected 3D map data the actual position, (d) retrieving based upon the determined actual position the actual position data coordinates from the 3D map data, (e) calculating the correction vector from position difference between measured radio based navigation system position coordinates and retrieved actual position coordinates (f) correcting the position given by the radio based navigation system with the correction vector.

Intentional Electromagnetic Interference and Critical Infrastructure

Abstract: Intentional Electromagnetic Interference or IEMI is the result of maliciously created electromagnetic disturbances in sensitive electronic systems. Modern infrastructure such as power supply, wireless communication networks, banking system, and transportation networks are dependent on civilian-off-the-shelf (COTS) equipment for its uninterrupted and reliable operations. Even though COTS equipment are tested for electromagnetic compatibility as per pre-defined un-intentional electromagnetic environment and test methods, intentionally created electromagnetic disturbances creates a lot of uncertainty in the proper functioning of critical COTS elements of the infrastructure. Infrastructure is interconnected widely distributed systems and there are several ports where substantial electromagnetic energy can be coupled intentionally by saboteurs and once coupled these disturbances travel through the interconnected system and cause breakdown at one or more weak links. It is probable that some of these breakdowns may lead to widespread disruption of critical infrastructure, such as power supply blackouts, financial service shutdown or disruption in railway network due to signal failures. Due to its inherent nature, EM attacks to civilian infrastructure may happen anonymously and repeatedly without detection. Protection of civilian critical infrastructure against the effects of IEMI has received a lot of attention recently from the EMC community. This article reviews the work done around the world with special emphasis on the work done in Sweden [e.g; 1–5].