Saab Ab

Erik Petrini

Bengt-Göran Sundqvist

Simone Duranti

Sören Molander

Andreas Persson

Johan Pellebergs

A method for estimating, from a platform, at least one parameter of an intruder. Consecutive frames of image data at different times of the intruder utilizing at least one passive sensor are generated. A direction from the platform to the intruder is determined based on the generated consecutive frames of image data. A time period remaining until a potential collision between the platform and the intruder is estimated. An angular extent of the intruder, as viewed by the passive sensor, is estimated based on the image data. At least one of a first relative location vector to a minimum intruder associated with the intruder or a second relative location vector to a maximum intruder associated with the intruder is estimated. An arrangement for generating input data to a sense-and-avoid system on-board a platform, a computer program, a computer program product and a platform carrying the arrangement are also provided.

Method and arrangement for estimating at least one parameter of an intruder

A range estimation device for use in an aerial platform including at least one passive sensor, a trajectory determination unit and a control system. A control unit is arranged to indicate to the control system to perform own-ship maneuvering of the aerial platform such that characteristics of passive sensor measurements from the at least one passive sensor enable a range estimation to a target to be determined. The control unit is arranged to determine characteristics of the own-ship maneuvering based on the range uncertainty estimations to the target. A method and a computer program product for use in range estimation device.

Range estimation device

A method for automatically determining an avoidance maneuver in an automatic collision avoidance system of an aircraft. A maximum kinematic acceleration envelope is determined by determining a multitude of avoidance maneuver angle kinematic acceleration pairs in a kinematic acceleration plane, and interpolating gaps between points, thus creating a curve. The curve is called maximum kinematic acceleration envelope. The curve may also be approximated by an analytical expression. An adjusted kinematic acceleration envelope is formed in the plane by forming a new envelope. The new envelope at each point laying closer to or at the same distance from an origin as the points of the maximum kinematic acceleration envelope and such that there is only one value of the kinematic acceleration a for a given avoidance maneuver angle. An avoidance maneuver angle is received for which a suitable bank angle and a suitable normal load is to be determined. Determining The magnitude of the kinematic acceleration a corresponding to the adjusted kinematic acceleration envelope for the avoidance maneuver angle is determined by reading the envelope curve, or if the curve is an analytical expression, calculating the curve by using the analytical expression. The normal load is determined based on the kinematic acceleration, and the avoidance maneuver angle. The bank angle is determined based on the kinematic acceleration and the avoidance maneuver angle.

Avoidance manoeuvre generator for an aircraft

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.

Termination map for an aircraft

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.

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Stockholm, Sweden

Erik Petrini