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.

Methods and arrangements for augmented reality

Abstract: The present invention relates to a method in a mobile device for augmented reality, which does not require markers in the real world, and comprises the steps of : receiving (200) an image of a physical real world environment taken by at least one camera at a position; receiving (210) said position; receiving (220) an id associated with said position, said id being associated with an algorithm to be used on said image to extract a set of features from said image; receiving (230) a stored set of features for said physical real world environment at said position, which has been extracted using said algorithm; extracting (240) said set of features from said image using said algorithm; and determining (250) if and how said camera is observing an object in said physical real world environment by comparing said stored set of features with said set of features. It also relates to a corresponding server and mobile device.

System and a method for navigating a vehicle

Abstract: In a system for navigating a vehicle according to the appearance of the surface region over which it moves there are at least three devices adapted to carry out a position determination of the vehicle according to a predetermined algorithm as well as members adapted to compare the positions determined by the devices and at a substantial deviation of any position from the other positions assume that this is erroneous and form an average of the other positions as the correct position of the vehicle.

Modifying L1 Adaptive Control for Augmented Angle of Attack Control

Abstract: In this paper we use L1 adaptive control to augment a baseline controller for improved angle of attack control of an unstable aircraft with multiple control surfaces. The scope is limited to considering a linearization of the aircraft dynamics in a single point of the flight envelope. Modifications are made to the design method to fit the intended application. These include control input redundancy management, tuning the state predictor in the case of an unmatched model error, using L1 adaptive control to augment a baseline controller and discrete-time implementation of the controller. The resulting controller is evaluated through a simulation example based on the Admire model.

In-situ growth of cerium nanoparticles for chrome-free, corrosion resistant anodic coatings

Abstract: Chrome-based anodization and sealing combined is a cost-effective solution for developing good corrosion protective coatings on aluminum (Al) and its alloys The toxicity of hexavalent chromium, however, requires new, sustainable, environmentally friendly, and efficient chromate-free sealing procedures Herein, a combination of cerium (Ce) sealing and hydrothermal sealing (HTS) is employed to improve the corrosion resistance of the commonly used alloy AA2024-T3 anodized by tartaric sulfuric acid (TSA) The morphologies and components of the resulting surfaces are systematically studied Characterization technologies such as SEM, TEM, EDX, XRD, and XPS demonstrate the in-situ growth of Ce oxide nanoparticles all through the porous structures of the anodic coating and closing of the pores by additional HTS treatment The results from the standardized corrosion test (ASTM B895) demonstrate an improved corrosion resistance obtained by the utilized chrome-free process