Abstract: A data transmission system 200 is provided for use with a projectile 120. The projectile 120 is arranged for firing from an artillery piece 110. The data transmission system 200 comprises at least one sensor 220 arranged to sense at least one parameter. The at least one sensor 220 is configured to produce an analogue voltage output. The data transmission system 200 further comprises a first voltage-controlled oscillator 230, configured to produce an output having a frequency proportional to the voltage output of the at least one sensor 220. The data transmission system 200 further comprises an encoder 240. The encoder 240 is configured to generate encoded data using the output of the first voltage-controlled oscillator 230 by switching between two signal streams having different properties. The different properties are used to encode for different logical states. The data transmission system 200 further comprises a transmitter 250 configured to transmit the encoded data.

Abstract: A system (200) for displaying virtual images (43a, 43b), in an ambient scene, the system comprising: a display device (100) for presenting virtual images to the user in a user field of view; a first imaging device (22) generating first ambient image data (CD1) in a first portion (ABC) of the ambient scene, a second imaging device (24) generating second ambient image data (CD2) in a second portion (DEF) of the ambient scene, the first portion and second portion overlapping to define a common portion (GDB) of the ambient scene imaged by both the first and second imaging device; a processor unit (50) for: receiving virtual image data (VID) specifying a virtual image (43a, 43b) and a target real world object (T, R, S) or zone (302, 304) to which the virtual image (43a, 43b) should appear anchored; receiving the first and second ambient image data; from the first ambient image data, identifying the presence of the target real world object or zone, and determining a position of the target real world object or zone

Abstract: There is disclosed a user-mountable display system (200) comprising: a display device (100) for displaying imagery at a first fixed depth and a second fixed depth, the display device having a display field of view (FOV); a range device (10, 22, 24) for generating ambient image data (AID, CD1, CD2) over a range field of view; a processing unit (50) configured to: receive ambient image data; generate range data using the ambient image data; use the range data to determine a first zone (302) of the ambient scene for display of imagery at the first depth, and a second zone (304) of the ambient scene for display of imagery at the second depth; receive virtual image data (VID) representative of at least two images (43a, 43b) for display as virtual images; and process the virtual image data (VID) to: determine from the virtual image data (VID), a virtual image associated with the first zone (302) or associated with the first depth (6), and distribute such first depth imagery (43a) to the display device (100) for dis

Abstract: A computer implemented method of detecting a fault in an onboard computing system (200) comprising: recording a log of messages transmitted on a databus (101) of the onboard computing system for a rolling timespan (116) according to a rule (124) stored in a memory system of the onboard computing system; detecting a target message-transmission event associated with the rule; 2024/236267 retrieving, in response to detecting the target event, the log of messages; determining whether the log complies with a valid digital chain associated with the rule, the valid digital chain comprising a group of messages associated with the target message-transmission event; and in response to the log failing to comply with the valid digital chain of the rule; storing or maintaining the log in a log database.

Abstract: In some examples, a method for manufacturing a switching structure for a radial slot line antenna, RLSA, array using a single semiconductor wafer element, comprises forming a set of active switching devices within the wafer element, a position of each active switching device on the wafer element selected according to a predefined configuration representing a slot element layout for the RLSA array, and forming driving circuitry within the wafer element, the driving circuitry for individually addressing respective ones of the set of active switching devices, whereby to enable selected bias signals to be applied to the set of active switching devices.

Abstract: In some examples, a dual polarized dipole structure comprises a first dipole arm comprising a first dipole and a second dipole arm comprising a second dipole, the first and second dipoles being substantially planar and being joined to each other at a feed point of the dipole structure disposed at the centre of the first and second arms, whereby to form a dual polarized dipole radiating element for an antenna structure, wherein the first dipole arm and the second dipole arm are so arranged, with respect to a square unit cell, such that the first dipole and the second dipole are orthogonal to one another and so arranged as to lie on respective diagonals of the square unit cell.

Abstract: An optical communication system is provided. The system comprises an optical transmitter and receiver mutually optically coupled via an optical fibre cable assembly comprising an optical fibre cable and optical circuits, including a first optical circuit comprising a first optical isolator. The optical transmitter is configured to transmit an optical signal to the optical receiver via the assembly which is received by the optical receiver. The optical circuits are disposed to section the cable into a series of sections including first and second sections. The system also has distributed acoustic sensing (DAS) circuits including a first DAS circuit, which comprises a first DAS optical transmitter and receiver and a first DAS multiplexer/de-multiplexer The first DAS optical transmitter is configured to transmit a first DAS optical signal to the first DAS optical receiver via the first section or the second section and via the first DAS multiplexer/de-multiplexer.

Abstract: A head tracking system HTS configured to determine a head position and/or a head orientation of a user includes one or more optical sensors producing optical measurements; and one or more inertial sensors producing inertial measurements; a processor configured, when the optical sensors fail to provide optical measurements to determine the head location and the head orientation of a user, to operate in a coasting mode using the inertial measurements from the one or more inertial sensors to determine the head location and the head orientation of a user.

Abstract: A jet aircraft with an airflow modifying device in an engine duct thereof comprising: a flow inlet; a flow outlet; and a flow passage extending from the flow inlet to the flow outlet; wherein the device is arranged to receive an incident air flow; and wherein the device is configured to at least partially modulate the air flow in the flow passage to improve flow ordering of the incident airflow, the airflow modifying device further comprising: at least one pitot sensor integral with the device located at the flow inlet; and a pressure line comprising a first end and a second end, the first end connected to the pitot sensor and the second end configured to be connected to a transducer; wherein the pressure line is completely enclosed within the device.

Abstract: A flow body unit (600) for a fluid flow rig (10) for simulating fluid flow patterns; the flow body unit (600) comprising: a flow body support frame (700); a core member (800) extending from the flow body support frame (700) along a flow body unit longitudinal axis (630); the core member (800) having a leading edge end (822) and a trailing edge end (824), the core member (800) mounted to the flow body support frame (700) at its trailing edge end (824) such that it extends away from the flow body support frame (700) to terminate at a free end (834) defined by the leading edge end (822).

Abstract: A suspension strut assembly (10) comprising a strut cylinder (100) that is hollow and defines a chamber (110) and has a first free end (12). A strut cylinder piston (200) is located in, and operable to move along, the strut cylinder chamber (110) to define a first strut cylinder sub-chamber region (112) on one side of the strut cylinder piston (200) and a second strut cylinder sub-chamber region (114) on the other side of the strut cylinder piston (200). A suspension rod (300) extends from the strut cylinder piston (200) inside the second strut cylinder sub-chamber region (114), through an aperture (116) in the strut cylinder (100), to a second free end (14) outside of the strut cylinder chamber (110). The first strut cylinder sub-chamber region (112) is configured to be in fluid communication with a first working fluid circuit (1000) via a first flow port (120).

Abstract: A computer-implemented method of determining utilisation of resources in a system having autonomous capability. The method comprises receiving (304) a plurality of input data from a respective plurality of components of the system, and receiving (302) rule set data comprising a plurality of rules. Each of the plurality of rules is configured to determine an integrity value for the input data. The method further comprises processing (306) the plurality of input data and the rule set data to generate an integrity value for each of the plurality of input data, and using (308) the integrity values to determine utilisation of resources of the system.

Abstract: A self-propelled gun system defining a recoil mitigation system comprises a chassis; a gun barrel and a chassis suspension system comprising a first wheel arm extending away from the chassis to a first wheel, the first wheel being rotatably mounted on the first wheel arm, the first wheel configured for engagement with a support surface. The first wheel arm and first wheel are configured to support the chassis a distance (Dz) apart from the support surface. The recoil mitigation system is operable such that a maximum recoil damping distance (Dz_max) of the chassis from the support surface in the z-axis for a gun firing condition is controlled to be set according to a predetermined relationship by pivoting the first wheel arm relative to the z-axis.

Abstract: A display system (100) for displaying on a least two different types of display a view of an environment in a real world situation, the system comprising: a first display (200) of a first type; a second display (202) of a second type which is different from the first type; a control system (100, 108) for controlling how information is to be displayed between the first display (200) and the second display (202) and configured to: determine (500) there is available symbology relating to the real world situation; determine (502) a positionally correct location the symbology would occupy if visible; determine (504) that at least one of the first display (200) and the second display (202) are displaying a view that corresponds with the positionally correct location of where the symbology, or portions of the symbology, would occupy if visible; cause (512) the symbology, or portions of the symbology, to be displayed, in the positionally correct location in the at least one of the first display (200) and the second d

Abstract: A jet engine exhaust assembly 20 is disclosed. The exhaust assembly comprises a double-walled exhaust duct 22 comprising an inner wall defining the inner profile of the duct and an outer wall spaced apart from the outer surface of said inner wall to define a cooling space 21 therebetween. The double-walled exhaust duct 20 is a structural load bearing component.

Abstract: A system for delivering an image to a user via a waveguide display system and for determining integrity of an image, the system comprising a waveguide assembly including: an in coupling element configured to receive a collimated image from a imaging system and an out coupling element configured to direct the collimated image toward an eye of a user, wherein the waveguide is configured to direct at least a first portion of the collimated image from the in coupling element to the out coupling element to be directed to the user; wherein prior to the collimated image being directed towards the eye a second portion of the collimated image is configured to be directed towards an integrity monitoring module which determines at least one discrepancy between the collimated image and the image to thereby correct the first portion of the collimated image.

Abstract: A swash plate for a hybrid air vehicle able to transition between rotary-wing and fixed-wing flight modes is provided. The swash plate comprises: a frame arranged to be driven to travel up and down a plurality of legs extending from a fuselage of the air vehicle, the frame being mounted such that it can rotate relative to the fuselage; at least one connecting rod for coupling the frame to a wing member of the air vehicle, the at least one connecting rod being coupled at its top end to the wing member and at its bottom end to the frame, wherein a bottom end of the at least one connecting rod is arranged to slide along one side of the frame and to pivot about a transverse axis of the frame. A hybrid air vehicle having the same and a method of operating a swash plate are also provided.

Abstract: A method of simulating a RADAR system defined by a corresponding RADAR model comprising a transmit chain, a receive chain and a data processing chain, the method implemented by a computer comprising a processor and a memory, the method comprising: transmitting, by the transmit chain, a radio frequency, RF, signal into an environment including a target and optionally, clutter (2702); calculating respective reflected RF signals of the transmitted RF signal from the target and from the optional clutter (2704); receiving, by the receive chain, the respective reflected RF signals (2706); detecting, by the data processing chain, the target using the received respective reflected RF signals (2708); and determining a simulated output of the RADAR system using a result of detecting the target (2710).

Abstract: The present disclosure relates to radar decoys, methods for controlling radar decoys and UAVs having a radar decoy. The radar decoy may comprise a passive reflector arranged to reflect radar signals, and a semi-active metasurface configured to have a reflection coefficient with a time-variable complex component. The present disclosure also relates to a method of controlling a semi-active radar metasurface.

Abstract: A system and method for detecting anomalous system behaviour. The system includes a plurality of sensors and a trained autoencoder. The method of training includes: obtaining training data and test data comprising multiple data records for at least one engineering asset which corresponds to the engineering asset whose behaviour is to be classified, wherein the data records comprise a plurality of sensor readings for the engineering asset; fitting the autoencoder to the obtained training data; running the test data through the encoder of the fitted autoencoder to obtain encodings of the test data; generating a plurality of data sets from the obtained encodings, wherein the generated plurality of data sets include under-represented data sets; cloning the fitted autoencoder to create a cloned autoencoder for each of the generated plurality of data sets; and aggregating the cloned autoencoders to form an over-arching autoencoder.