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| Number | Title | Issue Date |
| 7338011 | Method making it possible to prevent vibration of a rudder of an aircraft and aircraft using this method A method for preventing vibration of a rudder of an aircraft may have, on a lateral aerodynamic surface of the aircraft's rudder, a protruding aerodynamic element capable of generating an aerodynamic effect tending to rotate the rudder about its articulation axis. A... | 03/04/2008 |
| 7258307 | Device and method for damping at least one of a rigid body mode and elastic mode of an aircraft A device for damping at least one rigid body mode and/or at least one elastic mode of an aircraft, especially for blast load reduction and increase of stability and comfort, in an airplane having at least one sensor, a regulation unit connected to the sensor, and at... | 08/21/2007 |
| 7130725 | Method for correcting control surface angle measurements in single viewpoint photogrammetry A method of determining a corrected control surface angle for use in single viewpoint photogrammetry to correct control surface angle measurements affected by wing bending. First and second visual targets are spaced apart from one another on a control surface of an ... | 10/31/2006 |
| 7090172 | Process for countering the vibrations induced in an aircraft by the windmilling of a fan and system of electric flight controls implementing this process A system and process for countering the vibrations induced in an aircraft by the windmilling of an engine fan may produce a first electric flight control command for a servocontrol to use in actuating a control surface of the aircraft. The servocontrol is slaved to ... | 08/15/2006 |
| 6928340 | Process and system for moving a control surface of an aircraft An electric control system (1) comprises a control unit (4) which comprises a member (5) able to be actuated by a pilot and a means of load-wise protection (7), and which delivers a first deflection order representative of the action exer... | 08/09/2005 |
| 6915989 | Aircraft multi-axis modal suppression system Vibrations due to excitation of the natural modes of an aircraft's body are suppressed by an active multi-axis modal suppression system. Dedicated sensors are positioned in the aircraft at optimal locations for sensing modal induced vibrations. The sensor produced s... | 07/12/2005 |
| 6816823 | Process for designing flight controllers Process for designing flight controllers, in which first for the rigid airplane and then for the elastic airplane the damping and the phase delay for each excitation frequency is determined, and the flight controller is adapted in such a manner that the structural r... | 11/09/2004 |
| 6772979 | Method and device for reducing the vibratory motions of the fuselage of an aircraft Method and device for reducing the vibratory motions of the fuselage of an aircraft. According to the invention, accelerometers (9, 10) are mounted on engines (M1, M4) of the aircraft (1) and, with the aid of the accelerometric mea... | 08/10/2004 |
| 6766981 | Control system for alleviating a gust load on an aircraft wing Disposed on each wing of an aircraft adjacent the wing tip is at least one deflector mechanism for twisting the wings as part of a control system for alleviating a gust load on the wing. The wing twisting is performed in conjunction with a vertical motion sensor, a ... | 07/27/2004 |
| 6416017 | System and method for compensating structural vibrations of an aircraft caused by outside disturbances Method for compensating structural vibrations of an aircraft caused by wind blasts and buffeting in an aircraft in flight includes the steps of: detecting the structural vibrations by measurement technology using roll rates determined in an inertial sensi... | 07/09/2002 |
| 6189836 | Model-following control system using acceleration feedback A feedback system for reducing the effects of destabilizing forces in a vehicle (e.g. helicopter) by utilizing acceleration feedback data sensed by an acceleration sensor located in the vehicle. This sensed acceleration signal is passed through a low-pass... | 02/20/2001 |
| 6161801 | Method of reducing wind gust loads acting on an aircraft A method of reducing the bending moment effect of wind gust loads acting on the wing of an aircraft involves adjusting the aerodynamic configuration of the wing so as to alter the distribution of lift generated by the wing during phases of flight in which... | 12/19/2000 |
| 6076767 | Flight control surface actuation system A flight control surface actuation system is provided in which a plurality of actuators (6-13) are connected to one another in order to synchronize their operation. Each actuator has its own gearbox such that the torque transmitted in the synchronizing el... | 06/20/2000 |
| 5669582 | Method and apparatus for reducing unwanted sideways motion in the aft cabin and roll-yaw upsets of an airplane due to atmospheric turbulence and wind gusts A method and apparatus for reducing the unwanted sideways motion of an airplane by reducing the lateral side loads and upsets caused by atmospheric turbulence and gusts is disclosed. A rudder modification command that causes the rudder command of the airp... | 09/23/1997 |
| 5667166 | Aircraft frequency adaptive modal suppression system An aircraft modal suppression system which recognizes that the frequency and phase of the body bending mode varies when the weight of the aircraft differs from the design gross weight. An active damper notch filter which is tabulated as a function of airc... | 09/16/1997 |
| 5375793 | Process for the control of the control surfaces of an aircraft for the low speed compensation of a lateral path deviation The present invention relates to a process for the automatic control of the control surfaces of an aircraft for the low speed compensation of a lateral path deviation, in which beyond a given deflection threshold (20) of the deflected rudder (17), there i... | 12/27/1994 |
| 5375794 | Apparatus and method for reducing aircraft loads resulting from atmospheric turbulence and gusts A controller for reducing unwanted sideways motion of an aircraft by reducing lateral side loads, resulting from air mass, turbulence and gusts. The controller functions in a manner that in the presence of higher frequency side loads, the rudder is caused... | 12/27/1994 |
| 5248114 | Adaptive autopilot An autopilot system including parameter identification circuits wherein the function of the torque and the function of the translational force on a missile are unknown and varying (including approaching zero).... | 09/28/1993 |
| 5186416 | System for reducing the forces applied to the wings and particularly to the root of the wings of an aircraft in flight A system for reducing the forces applied to the wings of an aircraft in flight includes an accelerometer for measuring the vertical acceleration of the aircraft and generators for generating signals to control the aerodynamic surfaces in the wings of the ... | 02/16/1993 |
| 4932611 | Leading-edge flap system In order to realize an optimum operating condition of a leading-edge flap, a wind-direction sensor and a load sensor are provided at a leading-edge flap or at each of a plurality of parts of a leading-edge flap divided along the direction of a wing span. ... | 06/12/1990 |
| 4905934 | Universal-type gust alleviation system for aircraft The gust alleviation system was designed to be an add-on to any existing g-command flight control system. The system assumes that there already exists, a stability augmentation system which will hold the aircraft's attitude. This system minimizes the inte... | 03/06/1990 |
| 4863120 | Optimal flight guidance for aircraft in windshear An aircraft guidance system for optimizing the flight path of an aircraft in the presence of a windshear maximizes the time the aircraft remains in the air and the distance traveled regardless of the magnitude of the windshear, in the presence of horizont... | 09/05/1989 |
| 4845357 | Method of actuation and flight control The method of the invention provides for actuating at least one actuator, such as a piezoelectric transducer in response to movement of a waveguide, such as an optical fiber. In a preferred embodiment of the invention, both the piezoelectric member and th... | 07/04/1989 |
| 4841448 | Windshear flight recovery command system The present invention constitutes a system for generating an elevator command signal for directing a pilot in guiding his aircraft along a path effective for recovering from hazardous windshear conditions. The system includes a descending mode guidance su... | 06/20/1989 |
| 4821981 | Maneuver enchancement and gust alleviation system This invention provides a system for enhancing the performance of an aircraft during flight. The aircraft, which includes at least two control surfaces, such as stabilon and trailing edge flaps, includes devices for: generating a signal representative of ... | 04/18/1989 |
| 4725020 | Control system incorporating structural feedback Strain gages embedded in an upper skin structure portion of the wing, near the centerline axis, measures centerline moment and produces a feedback signal used for adjusting the control surfaces of the wing, to produce stabilizing forces. This enables the ... | 02/16/1988 |
| 4706902 | Active method and installation for the reduction of buffeting of the wings of an aircraft To reduce buffeting caused by separation on the wings of an aircraft, a parameter representing the buffeting in amplitude, frequency and phase is measured. The measuring signal is subjected to filtering intended to establish the characteristics of at leas... | 11/17/1987 |
| 4651958 | Method and apparatus for effecting fine control of aircraft velocity In order to achieve fine control of the velocity of an aircraft flying a predetermined flight path at a predetermined nominal speed in the presence of such perturbations as wind gusts, a low inertia, fast acting device is extended or deployed into the air... | 03/24/1987 |
| 4651955 | Device for automatically controllable unloading of aircraft wings A device for an automatically controllable off-loading of aircraft wings, arranged between the aircraft wing structure and the control surfaces, spoilers or flaps and is a single device or in the form of a plurality of devices respectively assigned to the... | 03/24/1987 |
| 4593285 | Windshear detection and warning system with evasion command A windshear warning apparatus which separately compares a plurality of signals derived from horizontal and vertical inertial acceleration and air mass acceleration components to indicate incipient windshear. The compared signals are substantially equal un... | 06/03/1986 |
| 4591113 | Aircraft controls On an aircraft having spoilers on the wing, the spoilers are converted, according to this invention, following the ACT philosophy, for use in countering gust effects. Accordingly, a sensor of gusts is arranged to transmit warning of the arrival of a signi... | 05/27/1986 |
| 4227662 | Air turbulence reducer An aircraft carries a pressure indicator well in advance, which may record barometric pressure of vertical air currents. The indicator reading is converted to electric current and averaged over a short period. The unaveraged current at a given position of... | 10/14/1980 |
| 4050651 | Wing and reduced airspeed system for jet aircraft A thin, high performance swept wing of the tapered type with an improved leading edge characterized by (1) camber that increases from a minimum near the wing root to a maximum near the wing tip, and (2) substantially a constant leading edge radius extendi... | 09/27/1977 |
