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.

A simulating device

Abstract: The present invention relates to a device for simulating fire effects in military or civilian combat training, said device comprising a light source (1 ) and means adapted to control a light lobe formed by light beams from said light source. Said means comprises a two-dimensional array (3) of elements (18) electronically controllable to assume a selected state among at least a first state of letting through said light inciding thereupon in a main direction of said light lobe or a second state of not letting through said light inciding thereupon in said main direction, and a unit (2) adapted to control said elements for designing the spatial propagation of said light lobe.

Telescopic device and method for operating a telescopic device

Abstract: A method for operating a telescopic device and the elongated telescopic device per se comprises a support element formed to encompass first and second telescopic element mounted so as to be telescopically slidable relative each other in a longitudinal direction; the support element comprises a support element fluid actuator assembly; the first telescopic element is arranged to encompass the second telescopic element and comprises a first fluid actuator assembly. The support element fluid actuator assembly is fixed to an interior portion of the support element and is arranged for engagement or disengagement to a first envelope surface of the first telescopic element and wherein the first fluid actuator assembly is fixed to a first interior portion of the first telescopic element and is arranged for engagement or disengagement to a second envelope surface of the second telescopic element.

Advanced flow simulation methods in aircraft design

Abstract: The compressible Navier‐Stokes equations are solved numerically for turbulent transonic aerospace applications on parallel computers. An Explicit Algebraic Reynolds Stress Model (EARSM) models the turbulence. Expressing the EARSM as an extension of an eddy‐viscosity model makes the implementation straightforward in a flow solver with existing two‐equation eddy‐viscosity models. The k−ω transport equations are used as a platform for the model. The EARSM approach significantly improves the shock position for transonic flow over wings without substantial increase in computational cost. Industrial use of advanced flow modelling requires a short turn‐around time of computations. This is enabled through the use of parallel computers. To achieve good parallel performance the computational load has to be evenly distributed between the processors of the parallel computer. A heuristic algorithm is described for distributing and splitting the blocks of a structured multiblock grid for a good static load balance. Speed‐up results are presented for turbulent flow around a wing on a number of parallel platforms.

Flight vision system and method for presenting images from the surrounding of an airborne vehicle in a flight vision system

Abstract: The present disclosure relates to a method (300) for presenting images from the surrounding of an airborne vehicle in a flight vision system. The method comprises the step of providing (310) a plurality of images of the surrounding of the airborne vehicle. The plurality of images originates from at least two different sources. The method further comprises assessing (320) a quality measure in each of the images out of the plurality of images. The quality measure relates at least to the visibility of objects in the plurality of images. The method even further comprises automatically deciding (330) from which of the at least two different sources at least one image out of the plurality of images should be displayed. The decision is based at least on the assessed quality measure. The method yet even further comprises displaying (340) the at least one automatically decided image in the flight vision system. The present disclosure also relates to a flight vision system, an airborne vehicle, a computer program product and a computer-readable storage medium.

T-shaped broadband bandpass filter

Abstract: The filter unit has a center frequency and comprises a first dielectric substrate, a first conducting plane, and at least one transmission arrangement. The at least one transmission arrangement comprises a shunt node which has a shunt connection to the conducting plane. The electrical length of the shunt connection defines the center frequency of the filter unit. The transmission arrangement further comprises a plurality of transmission lines connected in series between an input port and an output port, wherein each port is connectable to auxiliary systems with a system impedance. Moreover, each transmission line has a characteristic impedance and wherein the characteristic impedance of each transmission line is less than the system impedance.