Showing papers by "Saab AB published in 2007"

Arrangement and method for generating information

Abstract: A method for generating input information associated with a question to be provided to a simulation device on-board a platform. The question is elected among a plurality of questions. A simulation criterion corresponding to the simulation is determined. A simulation scenario is modified depending upon the question. The input information is generated depending upon the elected question and the simulation criterion.

Method and apparatus for generating at least one voted flight trajectory of a vehicle

Abstract: Method for generating a voted trajectory of a vehicle in a first vehicle (10) comprising the steps of: receiving first trajectory data from at least one second vehicle (20,30) in receiver means (107) in the first vehicle (10), calculating trajectory data in calculation trajectory means (101) in the first vehicle (10), wherein the calculated trajectory data and the received first trajectory data concerns a determined vehicle, the determined vehicle being determined from a group comprising the first and the second vehicles, and generating the voted trajectory of the determined vehicle by a voting process based on the calculated trajectory data and the received first trajectory data.

Arrangement and method for providing a three dimensional map representation of an area

Abstract: The present invention relates to an arrangement (201) and a method for providing a three dimensional map representation of an area. The arrangement comprises an image generating unit (204) and a processing unit (206). The image generating unit (204) is arranged to generate time recorded images. The image generating unit (204) is arranged to provide a plurality of at least partly overlapping images each covering at least a part of said area. The processing unit (206) is arranged to stereo process an arbitrary number of at least partly overlapping image sets generated by said image generating unit so as to provide said three dimensional map representation. The arrangement is characterized in that a navigation unit (205) is arranged to output time recorded navigation states related to the image generating unit (204), and in that the processing unit (206) is arranged to, for each time recorded image to be stereo processed, associate the navigation states relating to a corresponding time record.

Hull or fuselage integrated antenna

Abstract: An antenna structure integrated in a hull or fuselage. The hull or fuselage can be the outer surface of an aircraft, artillery shell, missile or ship. The antenna structure includes an array antenna. The array antenna includes a number of antenna elements. Each antenna element includes a radiator and an RF feed. The antenna elements are arranged in a lattice within an antenna area including a central antenna area and a transition region outside the central antenna area wherein a number of the antenna radiators as well as resistive sheets are arranged in substantially the same plane as a surrounding outer surface of the hull or fuselage.

Device at an airborne vehicle and a method for collision avoidance

Abstract: A device at an airborne vehicle including a flight control system configured to control the behavior of the airborne vehicle based on acceleration commands, a first control unit configured to provide the acceleration commands to the flight control system, and a collision avoidance unit. The collision avoidance unit includes a detection unit arranged to detect whether the airborne vehicle is on a collision course and a second control unit arranged to feed forced acceleration commands to the flight control system upon detection that the airborne vehicle is on a collision course. A method for collision avoidance in an airborne vehicle.

Emergency flight plan

Abstract: An emergency flight plan useable for an aircraft provided with a navigation system wherein the flight plan includes a pointer matrix including a number of cells. Each cell of the matrix has a unique identification and each cell corresponds to a geographical area, and wherein each cell of the matrix includes an identification of a cell corresponding to a next waypoint in an emergency route.

Method, computer program and device for determining the risk of midair collision

Abstract: A method for determining the probability of a vehicle colliding with a detected object. The object is detected. A stochastic process is determined representing a relative distance between the vehicle and the detected object. The stochastic process has a direction and a velocity relative the vehicle. A safety zone of the vehicle is defined in relation to the detected object as a straight line perpendicular to a line of sight of the detected object. The probability of colliding with the detected object over a period of time is determined as the probability of the stochastic process crossing the straight line with the direction and velocity of the stochastic process.

Termination secured route planning

Abstract: A method of forming a safe termination operation volume, and an aircraft provided with a system using such a volume to plan a flight route and/or an emergency route The volume indicates the lowest allowable flight altitude to achieve a glide path of a vehicle to a termination point of an area of interest, wherein non allowable fly zones are taken into consideration by adding flight altitude to come around the non allowable fly zones when calculating the lowest allowable flight altitude

Termination map for an aircraft

Abstract: A method of creating a termination map for an aircraft over an area of interest indicating the lowest allowable flight altitude to achieve a glide path of a vehicle to a termination point of the area of interest and a map of vectors of the area of interest indicating direction towards a termination point to control an unmanned vehicle.

Ground target tracking using acoustic sensors

Abstract: In this paper the tracking of ground targets using acoustic sensors, distributed in a wireless network, is studied. The solution to the tracking problem is given within the Bayesian recursive framework. A particle filter (PF) is developed which includes a data association technique based on joint probabilistic data association (JPDA) and a method for handling road constraints. Validation and evaluation of the tracking algorithms are performed using real data extracted from a ground sensor network. The tracking of the targets shows a satisfactory result.

Particle filters for tracking closely spaced targets

Abstract: In this paper we will consider several algorithms for tracking closely spaced objects. In particular we will concentrate on various particle filter implementations. One particular problem when using a joint multi target particle filter is the so-called mixed labelling problem. This problem amounts to the fact that different particles will have a different labelling w.r.t. target identity. The combination of the mixed labelling problem and naive or straightforward track extraction leads to performance degradation. This will be illustrated and alternative methods to alleviate this effect will be presented.

Vector backstepping design for flight control

Abstract: A backstepping design for an aircraft described by rigid body dynamics is proposed. The system states are the unit velocity vector and the angular velocity in a body-fixed coordinate system. The res ...

Fault tolerant data bus node and system

Abstract: A data bus node, being a control node or a sensor node and being arranged to communicate over a TDMA data bus. The node includes a time signal processing device being configured to define a TDMA time slot transmission schedule for at least the node. A switch is configured to either connect or isolate a transmission path of the node to the bus and is configured to be controlled by the TDMA time slot transmission schedule for the node via a bus transmission access control device. The bus transmission access control device is configured to be further controlled by at least one external control signal via at least one external data transmission link being physically separated from the bus. A fault tolerant data bus system includes such a bus node and an aircraft exploiting the node/system. The babbling idiot problem is solved and at the same time the node/s/system fail silent behavior is enhanced.

Method for handling different versions of an application, and an automation system

Abstract: The invention relates to a method in an automated system for handling at least two versions of an application. The system comprises a controller 8 for automation of a process by means of the application stored thereon in bidirectional connection with a communication server 2. The communication server 2 is in turn in bidirectional connection with at least two clients. By means of the method an improved communication between a communication server and several clients are provided. Graphics and images can be displayed without reconfiguration when a new version of an application is used. The invention also relates to such system.

Cooling of avionics using a fuel tank and refrigerant source

Abstract: An avionics cooling system including an avionics cooling circuit operating with a liquid coolant; a fuel circuit; and a vapor cooling cycle operating with a refrigerant. The avionics cooling circuit transfers heat withdrawn from avionics to the fuel circuit, whereby the heat is dumped into fuel, and the vapor cooling cycle transfers heat that cannot be dumped into the fuel from the fuel circuit to ram air.

Internal pressure relieving device for anti-armour ammunition

Abstract: An internal pressure relieving device for anti-armour ammunition. The device is mainly adapted for use with barrel-loaded ammunition, that is a naked round including a cartridge case, which normally would be located in its packaging. A plurality of slot formed openings have been cut out through a wall of the cartridge case and the openings have been sealed by inserts of polymeric plastic introduced with a tight fit into each opening. Hence, by the characteristics of the plastic material, the inserts can be configured to open up at a predetermined level of temperature. Alternatively, the inserts open up at a predetermined level of pressure in the cartridge case.

Efficient 3D Simulation of Thin Conducting Layers of Arbitrary Thickness

Abstract: In this paper it is demonstrated how a class of relatively complex EMC simulations can be performed at a low cost, both in terms of time and money. Using a symmetric, two- way boundary condition formulation, shielding metal layers can be included in a global electromagnetic simulation, without the need to resolve in detail the interior of the layer. This formulation, which has been previously used for some specific microwave and EMC problems, has no restrictions on the ratio of layer thickness to the skin depth. It is implemented in a commercial finite element (FEM) solver installed on a standard PC and no source-code programming is required. The method is validated and its usefulness demonstrated by applying it to a number of 3D examples of general EMC relevance.

Simulation device and simulation method

Abstract: A simulation device for generating an answer to a question inputted thereto. A communication unit is configured to input a selected question associated with a first criterion and a second criterion. A generating unit is configured to generate a copy of a continuously updated environment model. A generating unit is configured to generate a simulation scenario, depending upon the first criterion. A modifying unit is configured to modify the generated simulation scenario. An applying unit is configured to apply the modified generated simulation scenario to the generated copy of the continuously updated environment model. A simulating unit is configured to perform a simulation process in accordance with the second criterion. An answering unit is configured to answer information, depending upon a result of the simulation process.

Business process reengineering in the automotive area by simulator-based design

Abstract: The science of simulation and modeling (SM) strives to showcase the highest possible level of reality in order to determine the conditions necessary for optimal performance. SM is a multifaceted an ...

Dispenser arrangement for discharging countermeasure means

Abstract: A dispenser for a platform, configured to be mounted to the platform and connected to power- and control-systems of the platform. The dispenser includes a magazine for a plurality of pyrotechnic countermeasure cartridges. The magazine is configured for removable fixation to the dispenser by one single fixing bolt in a central location thereof for securing the magazine to the dispenser in an operative mode. A first lock associated with the dispenser and a second lock associated with the magazine are configured to arrest the fixing bolt in interlocking engagement with the first lock and preventing the fixing bolt from coming loose due to environmental influence.

A method and apparatus for manufacture of a profile element

Abstract: A method and an apparatus for manufacturing of a profile element including a web portion, a first and second flange portion, which extend from the web portion and are disposed essentially opposite each other. The method includes folding a blank of composite material about a first and second flange forming surface of a forming tool. The method includes setting at least one flange forming surface of a forming tool a distance from another flange forming surface greater than a desired distance between inner surfaces of the flange portions of a finished profile element. The folded blank is cured and a gradual decrease of the distance between the flange forming surfaces is simultaneously controlled. The cured profile element is removed from the forming tool.

Arrangement, method and computer program product for enhanced prognostics

Abstract: A method, a computer program product, a device and a monitoring arrangement for monitoring operation of an exchangeable unit in a machine. The monitoring arrangement includes at least one sensor, a control unit and a memory, that is arranged on the exchangeable unit.

Device arranged for illuminate an area

Abstract: A device arranged to illuminate an area. The device includes a light source arranged to transmit a light lobe coded with information, and having a predetermined solid angle defining the width of the lobe. The light lobe is expandable/compressible between a first mode in which the light lobe has a first predetermined solid angle and a second mode in which the light lobe has a second predetermined solid angle. The light lobe is arranged to carry first information in the first mode and second information in the second mode.

Arrangement and method for monitoring a hydraulic system

Abstract: An arrangement for monitoring a supply within a platform. A sensor is arranged to generate sample values relating to a fluid characteristic variable, wherein the fluid is fed by the supply within the platform. A processor is arranged to receive a plurality of sample values from the sensor. The processor, is arranged to generate an absolute value of a difference between each of the received plurality of sample values and a subsequent associated sample value, wherein the received sample values are generated during a predetermined time period. The processor is arranged to determine an indication number corresponding to the number of the generated absolute values which are greater than a predetermined threshold value. The sample collecting process is only active when a criterion comprising a stable pump in a no load condition and all hydraulic consumers are in a resting position or close to a resting position is fulfilled. The processor is arranged to generate a piece of indication information depending upon a result of a comparison between the determined indication number and a predetermined comparison value.

Target mechanism and a base unit in such a target mechanism

Abstract: A target mechanism for shooting, including a base unit and a target body which is movably connected to the base unit. The base unit includes elements for moving the target body from a first position to a second position. The second position is an optional position based on at least a signal to the moving elements. A base unit in a target mechanism including elements for moving a target body from a first position to a second position. The base unit includes a control unit arranged to generate at least a signal to the elements for moving the target body to the second position based on the at least a signal.

A method and apparatus for manufacturing of a wing spar profile element

Abstract: The present invention relates to a method and an apparatus for manufacture of an elongated beam profile element (3) comprising a recess (15) provided for accommodating a support element (4), such as a power plant support. The method being performed by forming the blank (28) into the web portion (23) with at least one first protrusion (21) formed to extend across the web portion (23) and to protrude outward from the web portion's (23) outer surface (35); and into the first flange portion (17) with at least one second protrusion (19) formed to extend across the first flange portion (17) and to protrude inward from the first flange portion's (17) inner surface (37), wherein this second protrusion (19) merges into the first protrusion (21) and constitutes said recess (15)ffor accommodating the support element under the wing.

Simulation system and method for determining the compass bearing of directing means of a virtual projectile/missile firing device

Abstract: A simulation system including at least one virtual projectile/missile firing device associated to a determined position and having a movable director arranged to direct a virtual projectile/missile towards a target and an image capturer arranged to capture at least one image of a scene in front of the director. The simulation system includes a terrain database with the positions of landmarks marked, a processor arranged to process the image of the scene so as to identify at least one landmark of the terrain database in the image and the processor is further arranged to determine a compass bearing of the director based on at least the position of the virtual projectile/missile and the position of the identified at least one landmark.

Electricity generating device for use in an armour arrangement, and an armour arrangement of this kind

Abstract: An electricity generating device for use in an armor arrangement, and to an armor arrangement. The armor arrangement includes two inert reactive armor modules arranged one behind the other, which each include a plate made of inert material, interposed between steel plates. Sheet-shaped members are mounted or baked onto the inert material. The sheet-shaped members are provided with a number of mutually separate regions in which, or next to which, there are disposed elements which convert mechanical vibrations or shock waves in the inert material into electrical voltage. The elements can include crystals or piezoelectric layers. The ammunition part or ammunition effect which penetrates the inert reactive armor modules and which generates the mechanical vibrations or shock waves provokes in one or more elements the generation of a voltage which can be used to initiate counteragents against the penetration.

Method for designing array antennas

Abstract: A method for designing low signature array antennas using a calculation method. The method proposes a way of improving antenna and signature performance of array antennas. According to the method electromagnetic antenna and signature characteristics are specified, an iterative optimizing method is performed to design the antenna to fulfil the specified characteristics, the iterative method is interrupted when a design fulfils the specified characteristics, and the specified characteristics are readjusted in an iterative optimizing method to follow if the specified characteristics not are fulfilled.