Abstract:
An impact cartridge unit for military exercise comprises a cartridge (1) containing a propulsive agent and on top thereof a member (2) simulating a low velocity grenade to be fired by a firearm or the like. Said grenade simulating member comprises an arrangement (5) adapted to simulate a detonation of a low velocity grenade and means associated therewith for triggering said detonation.
Abstract:
The present invention relates to a method and an arrangement for, in multi-stage rockets (3) provided with a number of successively ignitable rocket engines (7, 13) arranged one in front of another in the flying direction of the rocket and joined together detachably with one another, each following rocket engine (13) in the ignition sequence depending, for its ignition, on being initiated after a preceding rocket engine (7) has been able to bun out, causing each preceding rocket engine (7) included in the ignition sequence to be jettisoned by virtue of the next engine having reached its working pressure. According to the invention, each preceding rocket engine is designed with a preferably conical guide part (11) which is directed forwards in the flying direction of the rocket and geometrically adapted to the exhaust nozzle (12) of the following rocket engine (13) and which, in the initial position, is fitted into said exhaust nozzle (12) and fixed in this position by means of at least one blocking part (15) which is deformable or capable of elastic recovery.
Abstract:
This invention concerns a weapon effect simulation system comprising a fire simulation system and at least one hit simulation system. The fire simulation system comprises both means (2) for transmitting electromagnetic waves to simulate real ammunition from a weapon and means (21) for including information in the electromagnetic waves. The hit simulation system contains both means for receiving the transmitted electromagnetic waves and means (33) for determining, based on received electromagnetic waves, whether a target has been hit. The weapon effect simulation system is characterized in that the fire simulation system further comprises means (17) for calculating the imagined trajectory of the simulated ammunition and means (20) for determining the geographical position of the weapon, and in that the means (21) for including information in the electromagnetic waves are arranged so as to include information related to coordinates in the three-dimensional space for the calculated ammunition trajectory.
Abstract:
The invention relates to a method and an arrangement in electronic systems. The application can concern smaller systems for control, monitoring and regulation, and can also concern larger systems, such as, for example, systems for police, fire services, rescue services, etc. The application can also relate to a subsystem or a function in a very large system, for example comprised in management systems for military operations. The invention is charaterized in that it handles uncertainties within its area of application in a special way. These can be uncertainties regarding the parameter that is to be determined or uncertainties in the signals or data that constitute the basis for the determination of the sought parameter. There is often also a time-critically within the application. In certain applications, changes can be rapid and the invention can also handle such dynamic processes. The benefit of the invention is particularly marked in the difficult cases when the dynamic processes are associated with uncertainties. The invention carries out detection and prediction in electronic systems.
Abstract:
The present invention relates to an acoustic liner (1) arranged to attenuate sound. The acoustic liner (1) comprises a top sheet (5) having substantially linear characteristics and a liner core (2) or cavity. The top sheet (5) comprises a layer (3) of a metallic foam. The invention also relates to the use of said acoustic liner in a hot stream environment such as the outlet of an aircraft engine, and to the manufacture of an acoustic liner.
Abstract:
This invention concerns a method for reinforcing a core (2) constructed of at least two core parts (2a, 2b, 2c, 2d), each of which exhibits a top side, a bottom side and walls joining the top side and bottom side. The core parts (2a, 2b, 2c, 2d) are arranged joined wall-to-wall with one another along a joint seam (4a, 4b, 4c) filled with glue, preferably in the form of a glue film. The method is characterized in that notches (5a, 5b, 5c) are realized in a number of places in the glue joint, which notches extent between the walls from the top side to the bottom side of the core parts so that the glue joint can be divided into pieces. The invention also encompasses an article fabricated in accordance with the aforementioned method.
Abstract:
The invention relates to communication of data in a time division multiple access system where the data is transmitted wirelessly between station (MS1-MS6; BS1-BS3) in time slots. The time slots are arranged in frames of a repeating frame structure. The stations (MS1-MS6; BS1-BS3) autonomously select time slots for transmission of data according to a self-organizing transmission algorithm, which allows a first station (MS1) to reuse a time slot that is allocated to a second station (MS2-MS6, BS2, BS3). According to the invention an addressed message (M M1 Adr ) is sent from a first base station (BS1) to a mobile station (MS1). This station transmits am acknowledgement message (Ack M1 B1 ) in response to the addressed message (M M1 Adr ) in order to confirm a safe receipt of the addressed message (M M1 Adr ). If due to for example a high traffic load, the acknowledgement message (Ack M1 B1 ) cannot be received directly by the first base station (BS1), the mobile station (MS1) sends this message (Ack M1 B1 ) via a second base station (BS2) to a message handling entity (MHE) in a network (N), which is responsible for the transmission of the addressed message (M M1 Adr ). The message handling entity (MHE) may either be a separate node in the network (N) or be included in the first station (BS1). Thanks to the proposed solution, unnecessary repeated transmissions of the addressed message (M M1 Adr ) can be avoided, and consequently valuable wireless bandwidth be saved.
Abstract:
The invention concerns a method and a system for calculating a flight route between a first position and a second position. According to the method, the first position is chosen as the current position, and the following steps are then repeated until the second position is reached: a loss function is determined corresponding to each flight path in a set of flight paths that are predefined in relation to the current direction of flight; a flight path that yields the most advantageous value for the loss function is selected; a subsection from the current position and a predetermined number of positions forward are registered for the selected flight path, and the position at the end of the subsection is chosen as the new current position.
Abstract:
The subject invention concerns a method of manufacturing mould sections or mould inserts of the type used as interior support and moulding parts during the manufacture of products of malleable materials, such as fibre armoured polymer materials and such as are similar thereto, inclusive of the empty spaces in the final state of the products, such as integrated support profiles, built-in tank spaces etc. Thus, the relevant mould sections or mould inserts, according to the subject invention, shall be produced of a particulate material, in itself hard, that can consist, e.g., of sand, metallic powder or another similar product and that, contained in a gas-tight bag, gives the mould insert the desired exterior shape in a matrix or device equivalent thereto while the bag is vacuum sealed such that the particulate material forms a body of firm cohesion, after which the opening used for the vacuum sealing of the bag is hermetically sealed. The subject invention entails the method of manufacture of said mould inserts in question as well as the method of utilising the same.
Abstract:
The invention concerns a device for overvoltage protection in a wind turbine comprising a drive shaft (7) that is arranged to operatively connect one or a plurality of rotor blades (12) to a generator (9). The invention includes a drive shaft (7) containing a core of carbon fiber composite (7a) with a longitudinally through-passing cavity. In one end a connector (5) for a hub (4) that connects the rotor blades (12) is arranged to be introduced, and in the other end a coupling part (10) to the generator (9) is arranged to be introduced. An inner layer of fiberglass composite (7b), which is integrated with a core of carbon fiber composite (7a) in the drive shaft (7), surrounds the cavity and is arranged so as to electrically insulate the connector (5) and the coupling (10) from the drive shaft (7), which is electrically connected to ground.