Abstract:
A backlit flat panel display (10) includes a fluorescent tube (16) positioned for illuminating the display, and a plurality of display illuminating LEDs (46) on the periphery of the display. The fluorescent tube (16) illuminates the display (12) through a first range of brightness above a predetermined transition level and the LEDs (46) illuminate the display (12) through a second range of brightness below the transition level. When the illumination of the display is adjusted through the transition level to account for changes in ambient light, the LEDs (46) and the fluorescent tube (16) are operated together, so that the combined brightness of the illumination provided by the LEDs (46) and the fluorescent tube (16) will provide the desired display brightness; this advantageously compensates for delayed illumination of the fluorescent tube at start up and for persistence in the tube after shutdown.
Abstract:
An autothrottle system for an aircraft includes a motor, actuator assembly, and position sensor operatively connected between the motor and a moving portion of the actuator assembly. An electronic controller is configured to control the motor to move the actuator assembly to actuator positions based at least on position information from the position sensor to move the throttle lever to lever positions. The actuator assembly includes a bearing assembly having a plurality of bearings to contact a surface of a shaft for converting rotational movement of the shaft into linear motion of the bearing assembly along the shaft. The actuator assembly further includes a shuttle arm having at one end a mounting surface to attach to the bearing assembly and at the other end a linkage arm operatively coupled to the attachment end of the lever.
Abstract:
An image display generator for use in a head-up display includes an array of light emitting devices such as LEDs or VCSELs formed on a semiconductor layer deposited on one surface of a glass like, e.g. Sapphire, sheet in which a plurality of lenses are formed on the opposite surface with each lens aligned with a respective one of the LEDs or VCSELs. A layer of transparent insulating material is disposed over the semiconductor layer and is coated with a reflecting material. Light emitted by the LEDs is directly incident onto respective over the lenses and is indirectly reflected onto the lenses by the reflecting material.
Abstract:
An autothrottle for an aircraft that includes a power-control input (PCL) manually movable by a pilot along a travel path to effect a throttle setting that controls engine power of the aircraft. The autothrottle determines a control-target setting for a throttle of the aircraft and dynamically adjusts the throttle according to the control-target setting, including moving the PCL to achieve the control-target setting. A virtual detent is set and dynamically adjusted at positions along a travel path of the PCL corresponding to the control-target setting. The virtual detent is operative, at least when the autothrottle is in a disengaged state for autothrottle control, to indicate the control-target setting to the pilot via a haptic effect that applies a detent force opposing motion of the PCL in response to the PCL achieving the position of the virtual detent.
Abstract:
Dynamic monitoring of the amount of fuel remaining in an aircraft fuel tank is effected by delivering a constant volume flow of an inert gas into the fuel through the respective open distal ends of a sensor conduit tube and a reference conduit tube, each of which extends from a proximal end exterior of the tank to its respective distal open end located within the fuel tank. The sensor conduit tube distal end is fixed closely proximate the bottom of the tank, and the reference conduit tube distal end is fixed proximate but at a vertical spacing h from the sensor conduit tube distal end. The pressure at which the gas is delivered into the fuel at the constant volumetric rate through each of the sensor and reference conduit tubes is monitored. The pressure difference between the monitored pressure in the sensor conduit tube and the pressure in the free space in the fuel tank above the surface of the remaining fuel is directly proportional to the weight of the fuel lying above the sensor conduit tube distal end. The density of the fuel is proportional to the monitored pressure difference between the sensor and reference conduit tubes, divided by the vertical spacing h. The calculated weight of the fuel, divided by the calculated density of the fuel, is proportional to the volume of the fuel remaining in the tank.
Abstract:
A system and method for facilitating user entry of a manually-adjustable data setting in an aircraft cockpit normally presents an image of the data setting on the display at a predetermined size. When the user commences to manipulate a control for manually adjusting the data setting, the imaged data setting on the display is automatically enlarged to a predeterminately enlarged size to thereby unambiguously direct the user's attention to the imaged data setting to be adjusted. The imaged data setting on the display is returned from its enlarged size to its normal size when user manipulation of the control has ceased, preferably a predetermined time interval after such user manipulation has ceased.
Abstract:
In an aircraft conventionally-including a redundant pair of independent primary altitude determination systems of accuracy certified for RVSM operations, an initially loosely calibrated backup altimeter (32) receives independent static pressure data for use in calculating altitude.
Abstract:
A flat panel display (10) for presenting graphical renderings (16) of aircraft flight, operation and system status data to an aircraft pilot renders the data at various predetermined brightness levels depending on the category of data assigned to that data. Primary data appears on the screen (12) at a full brightness level and secondary data appears on the screen (12) at a brightness level less than the full brightness level. In this manner, a wide variety and range of aircraft flight, operation and system status data can be simultaneously conveyed to the pilot on a single display screen (12) through selective illumination of particular classes or categories of the data on the display at predetermined brightness levels, thereby advantageously directing the pilot's attention specifically to the primary data which is presented at full brightness.
Abstract:
An improved flat panel display provides reduced reflection of incident light on the display to improve visibility. The display includes a transparent top cover panel such as glass which is bonded or laminated to the display polarizer. The outer viewing surface of the top cover panel carries a plurality of integral surface features defined in the surface, which may comprise etched bumps or micro-machined tetrahedron-shaped protuberances that may be truncated, smoothed, and/or variously oriented and sized to further reduce incident light reflectivity. A multi-layer HEA coating on the featured surface defines a graduated transition layer with an index of refraction that gradually, and preferably smoothly, varies from layer to layer of the HEA coating from the index of refraction of the top cover panel to the index of refraction of the ambient air or other material which the outermost viewable surface of the display presents an image to an observer or viewer.
Abstract:
A flat panel display system (10A, 10B) for an aircraft display includes a graphics rendering computer (34) for rendering of anti-aliased graphical imaging data derived from aircraft sensors for full-field imaging on a cockpit display screen (12A, 12B). A comparator processor (32) independently generates, from the same sensor data, a selected subset or "points of light" of the display screen image and compares the points of light data to the data generated by the rendering computer for the same display screen pixel locations. The comparator processor checks a meaningful subset of the imaging data generated by the rendering computer for each display refresh scan and thereby obviates the need for the otherwise-required level of rendering computer certification that is impractical or unavailable.