Abstract: A firearm barrel tray having a barrel channel and a firearm accessory mounting interface, wherein the firearm barrel tray is configured to be attached to a firearm stock such that the barrel channel sits on a first side of the firearm stock and the firearm accessory mounting interface is configured to align with a recess on a second side of the firearm stock.

Abstract: A gun sling that allows easy movement between various firing positions includes a loop of strapping, a means of adjustment, quick-release system, anchor point, and a sliding device. The sliding device allows an attached weapon to travel across the length of the gun sling itself. A stretchable material may be incorporated to at least one segment of the gun sling in order to facilitate the transition. Additionally, the gun sling may be used in a system involving a harness or vest, wherein a user attaches the gun sling to the hardness or vest and can allow easy transition under a user's arms.

Abstract: This application discloses systems and methods of a laser device which could be used to aim firearms. The device includes a laser diode capable of emitting two or more different wavelengths of light to form a laser using a collimator, for example a single collimator or a compound collimator. In embodiments using a single collimator, the collimator can be repositioned at different distances from the laser diode to ensure proper positioning to create a laser beam for the particular wavelength of light emitted from the laser diode. In embodiments using a compound collimator, the collimator could have different collimating regions and be configured to rotate to cause the different collimating regions to receive light emitted from the laser diode such that different light wavelengths are properly collimated without needing to alter the distance from the collimator to the laser diode.

Abstract: A method of threat detection includes illuminating a scene with short-wavelength infrared (SWIR) illumination and receiving a return of the SWIR illumination reflected back from the scene. The method includes analyzing the return of the SWIR illumination to detect presence of man-made optics in the scene. Illuminating, receiving, and analyzing can be performed by a device, e.g., a rifle-mounted laser device.

Abstract: A multimode seeker includes an imager and an image processor. The imager is configured to capture image data received by the multimode seeker during a search period and a track period, wherein the search period includes a plurality of search cycles, and wherein a duration of each of the plurality of search cycles is equal to a predetermined pulse period plus a predetermined drift period. The image processor is configured to detect at least one laser candidate based upon the image data and to track the least one candidate laser during the track period.

Abstract: The present invention discloses a fast-locking anti-loosening locking device, comprising a body, a pull rod threads, a cap nut, a pressing block and an eccentric handle, wherein the pull rod penetrates through the pressing block and the body; the pressing block is connected onto the pull rod in a sliding manner; the inner end of the pull rod is articulated with the inner end of the eccentric handle, and the outer end of the pull rod penetrates through the body to be in screw-thread fit with the cap nut; a mounting hole is formed in the eccentric handle, and is internally provided with a wrench and a spring. The fast-locking anti-loosening locking device has the advantage that even through in the case of firearm firing, the device can still maintain a locked state instead of loosening, thereby ensuring the reliability and practicality of the mechanism.

Abstract: A modular system for mounting firearm accessories and a method for attaching a firearm accessory to a firearm are provided. In embodiment, the modular system includes a first mounting member capable of receiving a firearm accessory, and a second mounting member capable of combining with the first mounting member. A joining mechanism rotatable about an axis perpendicular to a longitudinal direction of the firearm, releasably joins the first mounting member with the second mounting member. In another embodiment, the modular system further includes an adjustment mechanism for adjusting engagement tightness of the mounting members with a mounting site to ensure more secure joining thereof.

Abstract: A method of making an armor component that includes wrapping a ceramic tile with a plurality of wrappers that are impregnated with a curable polymer, and forcing the curable polymer into microscopic surface cavities of the ceramic tile by isostatically pressing the wrapped ceramic tile while curing the curable polymer to obtain an armor component that includes the ceramic tile integrated with the wrappers.

Abstract: The present invention provides a smoke screen generator with a high diffusion rate of a smoke screen. Openings at both ends of a cylindrical housing are closed by a first closure 20 including an igniter and a second closure 30 having a smoke screen source discharge port 38 respectively. A porous cylindrical body 50 is arranged between the first closure 20 and the second closure 30. When an igniter 5 is actuated, a smoke screen generating agent 56 in a smoke screen generating agent-accommodating chamber 55 is ignited and burned, and a smoke screen source is generated. The smoke screen source moves and passes through the porous cylindrical body 50 and, after passing through a smoke screen source discharge port 38, the smoke screen source is discharged to the outside to generate a smoke screen.

Abstract: Systems and methods thermal management of a directed energy weapon are provided. The system may include a controller module executable by a processor to determine a planned energy emission from a light-emitting diode (LED) of the directed energy weapon. The controller module may generate a cooling instruction to influence a temperature of the LED with a cooling fluid in response to the planned energy emission. The controller module may cause the cooling fluid to be applied to the LED in accordance with the cooling instruction prior to a start of the planned energy emission of the LED.

Abstract: A conducted electrical weapon (“CEW”) launches wire-tethered electrodes from one or more cartridges to provide a current through a human or animal target to impede locomotion of the target. The CEW may detect when the electrodes launched from the cartridges may provide the current through more than one target. The CEW may detect when electrodes launched from the cartridges may provide the current through the same target. The CEW may set the pulse rate of the current based on detecting the launch of electrodes from one or more cartridges, detecting that electrodes may provide the current through two or more targets, and/or detecting that two or more pairs of electrodes may deliver the current through the same target.

Abstract: Shooting target assemblies have a post element having spaced-apart upper first and second protrusions defining an elongated target receptacle slot, the target receptacle slot having a closed lower end and an open upper end, a target plate having a main portion and an elongated stem portion extending from the main portion, the stem portion having parallel stem legs spaced apart to define a stem slot, a bridge portion connected between the stem legs away from the main portion and defining a lower end of the stem slot, the stem slot of the target plate being adapted to closely receive one of the first and second protrusions of the post element, and the target receptacle slot of the post element being adapted to closely receive the bridge portion of the target plate. The target receptacle slot may have a slot width adapted to closely receive the bridge.

Abstract: Bullet trap systems receive projectiles fired thereinto and allow for the recovery of the projectiles. Specifically, the bullet trap systems include strategically-placed support structures for ensuring that the projectile entry path remains unblocked and further includes sidewalls in the projectile containment units to prevent traveling of projectiles within the projectile containment units to prevent or minimize damage within the projectile containment units. Moreover, one or more accessibility hatches may be provided to allow individuals to gain access to the interior of the bullet trap systems.

Abstract: A charge comprises a case, the bottom of which has disposed therein an explosive cartridge, on the inside surface of which cartridge there is mounted a liner. Opposite the bottom, an upper portion of the case is cylindrical and threaded and is provided with a threaded bushing, which is mounted such as to abut the liner and has a through aperture with a diameter that is less than the inside diameter of the liner. The threaded sleeve has an internal or an external thread and the upper portion of the case has an external or an internal thread accordingly. The threaded sleeve has recesses about its periphery for the installation of a removable turning means. The bottom and the outside surface of the cartridge are conical. The liner is configured with a cylindrical shoulder in its upper part and has a height which is greater than that of the cartridge.

Abstract: A training cartridge for use in firearm malfunction training is disclosed. The training cartridge is used in a firearm including a clip or magazine to prevent conventional ammunition cartridges from being properly fed into the firing chamber of the firearm. The training cartridge includes a generally cylindrical body, a skirt portion extending outwardly relative to an outer surface of the body, an annular rim spaced from a lower surface of the skirt that is oriented toward the rim such that an annular recess is formed between the lower surface of the skirt and the rim. A feed malfunction is induced when a conventional ammunition cartridge, as it is fed into the firing chamber, is snagged by the adjacent training cartridge.

Abstract: The invention a multi-purpose, multi-reusable, multi-ejectable grenade and anti rioting device in a single unit. Explosion(s) occur by being thrown after setting the desire pyrotechnic effects. Further Characteristics in that principally consist of four quarter mountable oval shape charges that ejected or launch after being toss and impact with target surface or target object that will occur during detonation process hence create the desired pyrotechnic effects.

Abstract: A method and tooling for forming a cartridge case blank comprising backward extruding a tube from a length of wire stock in multiple backward extrusion steps with progressive tooling to obtain an intermediate blank that can be finish drawn without a preceding annealing step and which if otherwise not subjected to multiple backward extrusion steps, would require annealing prior to finish drawing to avoid tearing.

Abstract: One embodiment of the present invention provides a polymeric ammunition cartridge and methods of making and using the same. The cartridge includes a substantially cylindrical insert connected to a substantially cylindrical polymeric middle body. The substantially cylindrical insert includes a top surface opposite a bottom surface and a substantially cylindrical coupling element that extends from the bottom surface, a primer recess in the top surface that extends toward the bottom surface, a primer flash hole positioned in the primer recess to extend through the bottom surface, and a flange that extends circumferentially about an outer edge of the top surface.

Abstract: The disclosed technology includes a bumper system for use with an Explosive Ordnance Disposal disruptor. The bumper system can include a bumper stop configured the slidably engage the disruptor, and a bumper configured to receive at least a portion of an initiation system of the disruptor. The bumper may be configured to receive at least a portion of the initiation system such that the bumper is attached to the at least a portion of the initiation system by friction.

Abstract: The present invention provides methods for the manufacture of body line templates, and for the use of those templates to repair the body lines of motor vehicle body panels. The present invention improves body line repair by restoring body lines more precisely and in the fraction of time it would typically take. Templates are often used in the industry to cut and forge body panels or body panel pieces, but not for repairing body lines. The original pattern for a body line template is made from an undamaged, perfectly contoured panel, such as a quarter panel, door panel or fender. The body line templates are used as a guide to restore the original shape of the body line on a damaged body panel. The templates are also used as a guide to more easily perfect the body lines by manipulating the applied body filler. In this way, repair time can be reduced by fifty, or as much as seventy-five, percent.

Abstract: A shaft roundness gauge measures the roundness (or lack thereof) of a surface such as a bearing surface of a shaft or axle of a truck, tractor or trailer. The gauge comprehends a plurality of specifically sized rings or collars having inner diameters which correspond to common outside diameters of shafts, axles and other circular or cylindrical components. The ring includes a radial opening which receives a collet fitting which receives a probe housing of a dial indicator. A collet clamp may be tightened to secure the dial indicator to the ring. The ring and dial indicator are positioned on a shaft, at that position where the shaft or component is believed to be least worn. The dial indicator is zeroed and then the assembly is rotated around the shaft or component to determine, by the reading of the dial indicator, the location of and the extent of wear of the shaft or component.

Abstract: A tool calibration system includes a tool and a wrench pivotally coupled to the tool. The tool calibration system also includes a tool calibration device coupled to the tool and to the wrench. The tool calibration device includes a baseplate including an arcuate slot defined therein and a pin coupled to the baseplate and slidably moveable along the slot. The pin is configured to engage the wrench such that movement of the pin along the slot causes rotation of the wrench.

Abstract: A multipoint-measurement strain sensor which is free of a conduction failure originated from slippage at the time of lamination and which can reduce the material cost, and a method for producing the multipoint-measurement strain sensor are provided. A multipoint-measurement strain sensor 31 of the present invention includes a substrate film 34, a plurality of strain-sensing parts 33 formed on a first main surface 34a of the substrate film 34, routing circuits 37, 38 formed, in correspondence with the respective strain-sensing parts 33, on a second main surface 34b of the substrate film 34, and having outer connection terminals 37b, 38b near an outer edge of the substrate film 34, and a conductive paste 41, 42 to fill via holes 39, 40 such that each of the strain-sensing parts 33 is connected to the corresponding routing circuit 37, 38.

Abstract: Various optical systems equipped with diode laser light sources are discussed in the present application. One example system includes a diode laser light source for providing a beam of radiation. The diode laser has a spectral output bandwidth when driven under equilibrium conditions. The system further includes a driver circuit to apply a pulse of drive current to the diode laser. The pulse causes a variation in the output wavelength of the diode laser during the pulse such that the spectral output bandwidth is at least two times larger the spectral output bandwidth under the equilibrium conditions.

Abstract: Exemplary apparatus and method are provided for illuminating a sample. With such exemplary apparatus and/or method, it is possible to, using at least one source arrangement, provide at least one first electro-magnetic radiation. Using an optical system of an optics arrangement, it is possible to receive the first electro-magnetic radiation(s), and modifying the at least one first electro-magnetic radiation to be at least one second electro-magnetic radiation so as to be forwarded to the sample. Further, with the optical system, it is possible to extend the at least one second electro-magnetic radiation into or across the sample for a distance of at least 2 times the Raleigh range of a Gaussian beam when the optics arrangement and the sample are stationary with respect to one another. Additionally, using the optical system, it is possible to control a placement of a focus of the at least one second electro-magnetic radiation on or in the sample.

Abstract: Measurement of the three dimensional morphology of blood cells is performed using a model for simulating reflectance confocal images of the cells, providing the relation between cell morphology and the resulting interference patterns under confocal illumination. The simulation model uses the top and bottom membranes of the cell as the elements for generating the interference fringes, and takes into account the cell size, shape, angle of orientation and distance from the focal point of the confocal illumination beam. By comparing the simulated cell images to actual interference patterns obtained in confocal images obtained from the blood samples, the model can be used for providing three dimensional measurements of the individual cell morphology. This enables, for instance, in vitro measurement of the mean corpuscular volume of blood cells and diagnosis of hematological disorders which are associated with cell morphology deviations, such as thalassemia and sickle cell anemia.

Abstract: Provided is an optical displacement meter capable of enlarging an output signal region with respect to a region in which a light-receiving amount needs to be measured, a method for adjusting an optical displacement meter, and an optical displacement measuring method. The optical displacement meter includes a light-receiving element in which a maximum value of an output signal is set with respect to a boundary value, which is a maximum value of a region in which the light-receiving amount needs to be measured. The entire region of the output signal of the light-receiving element can be assigned to the valid region, in which the light-receiving amount needs to be measured with an optical displacement meter, and the optical displacement meter can have an enlarged output signal region with respect to the region in which the light-receiving amount needs to be measured.

Abstract: A film thickness measurement method capable of measuring the film thickness of a coating film in a short period of time while maintaining the advantages of the destructive measurement method that a high measurement accuracy can be obtained are provided. A film thickness measurement method according to an embodiment is a film thickness measurement method for measuring, in a coating film 10 including a plurality of films laminated in layers, the film thickness in each of layers 1-4, the method including: a working step for performing cutting work on the coating film 10 in such a way that the coating film 10 has a predetermined gradient; and a measuring step for deriving the film thickness in each of the layers 1-4 by measuring distances of boundaries 15a-15e of the respective layers 1-4 in the coating film 10 exposed as a result of the cutting work.

Abstract: Embodiments of the present disclosure provide a functional assembly, a display device and a terminal. The functional assembly includes a sensor unit, a first light-guiding component and a camera. The sensor unit includes an emitter and a receiver. The emitter is configured to emit probe light. The first light-guiding component is configured to introduce the probe light and transmit the probe light to the outside through the camera. The receiver is configured to receive detection light through the camera, the detection light being formed by reflection of the probe light against an obstacle. The functional assembly, the display device and the terminal in the present embodiment increase an area of a display region effectively, hence realizing an effect of large-screen display.

Abstract: A method is presented for determining strain in a magnetoresistive random access memory (MRAM) structure. The method includes exposing long lines of the MRAM structure to monochromatic light to produce a diffraction pattern, measuring changes in interference fringe spacing in the diffraction pattern, determining the changes in the local strain in the MRAM structure from the measured changes in the interference fringe spacing, and assessing a performance of the MRAM structure from values of the changes in the local strain.

Abstract: A method is presented for determining strain in a magnetoresistive random access memory (MRAM) structure. The method includes exposing long lines of the MRAM structure to monochromatic light to produce a diffraction pattern, measuring changes in interference fringe spacing in the diffraction pattern, determining the changes in the local strain in the MRAM structure from the measured changes in the interference fringe spacing, and assessing a performance of the MRAM structure from values of the changes in the local strain.

Abstract: A dimensioning system including a computing device running an alignment software program is disclosed. The alignment software uses range information from a range sensor in order to generate alignment messages. The alignment messages may help a user define a frame of reference and align the dimensioning system's range sensor for improved dimensioning performance.

Abstract: An inspection mechanism for metal blank, adapted for sensing the surface condition of a metal blank, includes a framework, a holding device, a shuffling device, and an inductive control device. It mainly utilizes the inductive control device to drive the holding device to hold and position the metal blank and control the shuffling device to move the sensor of the inductive control device to the path of sensing the metal blank, so as to conduct the sensing operation.

Abstract: An inventory management device wherein the user inputs a material of known characteristics such as weight, thickness, and width, or length into a computer via user interface. The device calculates the length of the material and displays the remaining coiled length on a display screen. When the user is ready to feed the material, the material is rolled over a feed wheel, which turns a measure wheel. The measure wheel communicates with a computer control chip to deduct the quantity fed off the coil. The actual remaining length is shown on the display screen in real time or near real time. When the user is finished working with the material, the user can select to print a label with a barcode to affix to the material. The barcode contains characteristics of the material so the material can be inventoried and/or reused on the feeder.

Abstract: A high-stability step gauge and a preparation method therefor, where the step gauge has a base body, the base body includes a pillar carrier disposed along a coordinate direction, gauge block mounting blocks are distributed on the pillar carrier, and gauge pieces are fixedly mounted on the gauge block mounting blocks. The high-stability step gauge has good accuracy and stability, a small size, and strong functions. Deformation errors caused by the step gauge due to factors such as a weight of the base body are effectively and prominently reduced by means of reasonable combination of the base body and the gauge block mounting blocks. The preparation method thereof provides a stable length direction low deformation performance by using a cylindrical rigid support as the base body. The sleeved gauge block mounting blocks have high fixed mounting stability, and positioning and assembly of the gauge pieces are accurate.

Abstract: A measuring device (10) for determining the location of one or more measurement points relative to the measuring device. The measuring device is arranged to be coupled to a non-contact distance measuring device or EDM (12) and one or more sensors (16) for determining the orientation of the EDM. The measuring device comprises an image capture device or ICD (20) operable to output digital images and being arranged to be coupled to the EDM such that the ICD moves in known registration with respect to the EDM. A controller (28) is arranged to receive data from the one or more sensors and the ICD. The controller is configured to: a) associate an image with the orientation of the EDM during exposure of the image; b) locate one of the measurement points within the image; and c) use the location of the measurement point within the image in combination with the EDM orientation to establish the direction of the measurement point with respect to the measuring device.

Abstract: In a target detection apparatus mounted in a vehicle, a target detector is configured to detect a target present in a forward direction of the vehicle based on image information acquired from an imager to capture images of a scene ahead of the vehicle. A position-of-collision calculator is configured to calculate an expected position of collision at which the target is expected to collide with the vehicle in the future based on a position of the target relative to the vehicle. A first determiner is configured to, based on the expected position of collision calculated by the position-of-collision calculator, determine whether or not a situation exists where a determination as to whether or not the target is a traversing target that is a target moving in a direction transverse to a forward direction of the vehicle can be made based on an optical flow of the target.

Abstract: A survey system includes a camera provided on a UAV and taking a plurality of images for photogrammetry. A surveying portion tracking the camera and continuously determining a position of the camera and a relative photographing position calculation portion calculates a relative photographing position of each image based on the plurality of images taken by the camera, and a traveling path calculation portion calculates a traveling path of the UAV from a survey result obtained by the surveying portion. A photogrammetry analysis portion associating a point group of the relative photographing positions calculated by the relative photographing position calculation portion with a flight path calculated by the flight path calculation portion, and generating data for photogrammetry.

Abstract: To provide a surveying device whereby there is no need to remove a light-receiving part when removing a handle. A surveying device is provided with a handle having a cantilever structure provided with a rod-shaped grip part and a handgrip support part for supporting one end of the grip part, and a body having a top-part structure having a two-headed structure configured from a body part and a body part extending upward, a light-receiving part for optical communication is provided, a handgrip support part in which the rod-shaped grip part is fixed in a detachable state is fixed to a top part of the body part, and the handgrip support part is fixed in a detachable state to a top part of the body part.

Abstract: Position-sensitive light beam detector comprising photodiodes and at least two weighting networks, each of which includes a signal output and network nodes. According to the invention, a plurality of the network nodes of the first weighting network is provided for the photodiode terminal in such a way that each node of said plurality of nodes is connected to a node of the second weighting network via a photodiode.

Abstract: The purpose is to accurately and promptly calculate an error of a magnetic sensor. A sensor error calculating device may include a GNSS attitude angle calculating module, a GNSS geomagnetism calculating module, and an error estimating module. The GNSS attitude angle calculating module may calculate a GNSS attitude angle of a movable body based on positioning signals of a GNSS. The GNSS geomagnetism calculating module may calculate a GNSS geomagnetism based on the GNSS attitude angle. The error estimating module may estimate a sensitivity error, a misalignment error and a bias error of the magnetic sensor by using a magnetic detection value of the magnetic sensor and the GNSS geomagnetism.

Abstract: In a vibrating structure angular rate sensor, a signal generator generates a phase change suppressing signal in which a phase change according to an amplitude of a rectangular wave signal generated by at least one of a first modulator and a second modulator is suppressed.

Abstract: A gyroscope includes connecting portions which are provided between a mass body and a mass body and connects the mass body with the mass body. Here, the connecting portions includes a fixing portion fixed to a substrate, a shuttle provided between the fixing portion and the mass body, a shuttle provided between the fixing portion and the mass body, a beam connecting the fixing portion with the shuttle, a beam connecting the fixing portion with the shuttle, a beam connecting the mass body with the shuttle, a beam connecting the mass body with the shuttle, and a beam connecting the shuttle with the shuttle. The fixing portion is provided between the shuttle and the shuttle.

Abstract: A ring laser gyroscope comprises a laser block that includes a resonant internal cavity defined by a plurality of surfaces of an optical closed loop pathway, and a plurality of electrodes coupled to the laser block. The electrodes are configured to generate a pair of counter-propagating laser beams from a lasing gas in the optical closed loop pathway. The ring laser gyroscope also includes a field reducer shield comprising an electrically conductive material, with the field reducer shield located completely within the laser block. The field reducer shield is configured to modify an electric field generated by the plurality of electrodes to substantially prevent ions in the laser block from migrating toward the plurality of surfaces of the optical closed loop pathway.

Abstract: The described embodiments relate to a photonic integrated circuit (PIC) for use in a fiber optic gyroscope (FOG). Some embodiments describe a PIC with connectors for coupling to external components such as a light source, a photodetector and a fiber coil, with beamsplitting devices (e.g., couplers), waveguide and other photonic components integrated on the PIC. Some embodiments describe a hybrid PIC (HPIC) with the PIC, light source and photodetector attached to a common submount, and with connectors for coupling to a fiber coil. Other embodiments describe an extended PIC (EPIC) that integrates the PIC components, the light source, the photodetector, and other components (e.g., a wavemeter) on a common substrate. The described embodiments may also include a detection/feedback circuit that provides control signals and other parameters to the PIC, HPIC, or EPIC, and receives output signals from the PIC, HPIC, or EPIC.

Abstract: Techniques are disclosed for systems and methods for sensor fusion with respect to mobile structures. A mobile structure may include multiple ranging sensor systems and/or receive navigational data from various sensors. A navigational database may be generated that includes data from the ranging sensor systems and/or other sensors. Aspects of the navigational database may then be used to generate an integrated model, which can be used to generally aid in the navigation of the mobile structure.

Abstract: Techniques are disclosed for systems and methods for video based sensor fusion with respect to mobile structures. A mobile structure may include at least one imaging module and multiple navigational sensors and/or receive navigational data from various sources. A navigational database may be generated that includes data from the imaging module, navigational sensors, and/or other sources. Aspects of the navigational database may then be used to generate an integrated model, forecast weather conditions, warn of dangers, identify hard to spot items, and generally aid in the navigation of the mobile structure.

Abstract: A position detection system according to an embodiment of the present invention includes a plurality of fixed stations 20; and a sensor unit 10 including an inertial sensor that detects movement history of a mobile body 51 and a distance sensor that detects separation distances between the mobile body 51 and the fixed stations 20. A position of the mobile body 51 is determined by detecting a first arrival position P1 obtained based on the movement history, a second arrival position P2 obtained based on the separation distances, and a relative distance L1 between the first arrival position P1 and the second arrival position P2, and by comparing a range value R1 obtained based on the movement history with the relative distance L1. The range value R1 is changed based on the movement history.

Abstract: An adaptive navigation system for airborne, ground and dismount applications. The system performs adaptive fusion of all sensed signals, information sources, and databases that may be available on a single or multiple cooperative platforms to provide optimal Positioning, Navigation, and Timing (PNT) state. To reduce error building over time, the system incorporates the concept of geo-registration fusion into the ANAGDA filter. The architecture of the ANAGDA filter consists of user/application configurable functionalities in hierarchical layers. The sensing layer senses the environment and contains the required databases such as surveyed landmarks, and Digital Terrain Elevation Data/Digital Elevation Model (DTED/DEM). The processing layer has a Smart Sensor Resource Manager which is a performance-based sensor/feature selection module. The measurement abstraction layer isolates the filter from hardware specifics.

Abstract: Disclosed is a method and apparatus for performing positioning of an unmanned aerial vehicle (UAV). The method may include determining a first position of the UAV using a first positioning system during flight of the UAV. The method may also include deactivating the first positioning system after determining the first position, and detecting one or more motor characteristics of one or more motors of the UAV during flight. Furthermore, the method may include determining a second position of the UAV based on the first position and one or more motions of the UAV that correspond to the detected one or more motor characteristics.