Abstract: A method and system of monitoring a structure, the method including: a) synchronously acquiring data comprising a plurality of operational parameters and at least one strain data, b) building a significant points dataset from the data acquired in step a), and c) modelling a relationship between the operational parameters and the strain data using the built significant points dataset to train a non-adaptive prediction functional supervised approximation method, wherein the step of building a significant points dataset comprises deletion of redundant information from the acquired data. The resultant models may be used to process structure real operation data in order to estimate the eventual crack initiation and crack growth on a set of predefined locations of the structure.

Abstract: A two-stage linear actuator particularly applicable to aircraft control surfaces. The first stage comprises a rotary input shaft driven by an electric motor having a helical threaded zone in its external surface at its inner end and a plurality of first helical roller gears configured to engage with the rotary input shaft in its helical threaded zone for rotating together. The second stage comprises a plurality of second helical roller gears configured to engage with the first helical roller gears for rotating together and with an output shaft having a helical threaded zone in its external surface at its inner end for converting the rotation of the second helical roller gears in a linear movement of the output shaft.

Abstract: A joint attaching a structural element to a composite part comprising a metallic attachment, this joint being subjected to a fire source on one of its sides, the fire side. The joint comprises a retaining device located at the side of the joint opposite to the fire side, the cold side. The retaining device comprises a first surface that is in contact with the metallic attachment, and a second surface which is in contact with the composite part. The second surface has a larger area in contact with the composite part than the area of the first surface in contact with the metallic attachment. The retaining device is made of a material with a high thermal conductivity. Such a joint may be in an aircraft.

Abstract: A guiding tool for the drill bit of a drilling apparatus and a method of making drills. The tool includes a body with an orifice for passage of the drill bit and a base with at least three protruding feet for resting on the working surface. The feet are configured with inner holes with an outlet at its ends. The tool is connected to a pneumatic device of pressurized gas supply which includes a signal indicative of correct positioning of the tool for performing a drill when a simultaneous blocking of gas output in said feet is produced when all of them are in contact with said working surface; the tool including a pressurized gas pipeline up to said feet.

Abstract: A device and a method for eliminating transitions in discrete signals. The working of the device and method is based on allowing the charge of a capacitor with one state when the state opposite the state to which it has been assigned is produced and allowing their discharge through a corresponding capacitor when their state is active. The signal is advantageously consolidated without needing processors or programmes, is very simple, there is increased reliability, and the device can very easily be integrated in any sensor, such as those used in aircraft.

Abstract: A workbench and an assistance method for manufacturing or checking electrical wiring harnesses. The workbench comprises: an assembly board; image projection devices on the assembly board; optical sensors arranged on the assembly board to provide information about its position; cameras arranged to capture gestures of the technician in charge of the workbench; a computer with a set of computer programs adapted to provide, through the image projection devices images in 1:1 scale of templates of the electrical wiring harness being manufactured or checked projected onto the assembly board and, superimposed on them, complementary images of aid requested by the technician, acting on virtual menus and/or buttons projected onto the assembly board.