Abstract:
The invention provides a method of dynamically alleviating loads generated on an aircraft (2) by a disturbance of gust and/or turbulence, the method comprising the steps of: on a flight of the aircraft (2), a monitoring is applied for automatically detecting a disturbance due to gust and/or turbulence and determining an incidence angle or angle of attack of the disturbance; when a disturbance due to gust and/or turbulence is detected, automatically generating control commands (36; 32, 38, 40, 42) for deflecting control surfaces dependent on the incidence angle or angle of attack; and applying the control commands (36; 32, 38, 40, 42) to deflect the control surfaces. For optimizing the performance, it is proposed to conduct at least one of the following step sequences A) and/or B): A) adapting the control commands (36; 32, 38, 40, 42) not only to the amount of the incidence angle or angle of attack but also to the gust length in order to adapt the deflection of the control surfaces both to the incidence angle or angle of attack and the gust length; and/or B) generating first control commands (y, 34; 32, 38) for first control surfaces and second control commands (36; 32, 38, 40, 42) for second control surfaces, comparing the incidence angle or angle of attack with a predetermined value and generating the first control commands (y, 34; 32, 38) to actuate the first control surface until the incidence angle reaches this predetermined value and generating the second control commands (36; 32, 38, 40, 42) to add a deflection of the second control surfaces when the incidence angle or angle of attack is above the predetermined value.
Abstract:
An active winglet includes a body portion substantially parallel to a wing of an aircraft, as if it were an extension of the wing, and an angled portion that projects at an upward angle from the body portion. The body portion is attachable to an aircraft wing and includes a controllable airflow modification device coupled thereto. By virtue of having a controllable airflow modification device, the winglet is capable of adjusting a control surface of the controllable airflow modification device in response to in-flight conditions, to reduce wing loads, increase range, and increase efficiency.
Abstract:
본 발명은 자력탐사용 휴대용 무인비행선 및 이를 이용한 자력탐사 시스템에 관한 것으로, 기체의 부력을 이용하며 자체 동력으로 추진하는 비행선 본체; 상기 비행선 본체를 자동으로 운항시키기 위한 자동운항장치; 상기 비행선 본체에 설치되며 지표나 지층의 자력을 측정하기 위한 자력측정장치; 상기 자력측정장치를 통해 획득된 자기데이터를 외부로 송신하기 위한 무선통신장치; 및 상기 자동운항장치 및 상기 자력측정장치의 작동을 제어하기 위한 제어모듈; 을 포함한다. 이에 따라, 무인비행선의 전체적인 운항시간을 늘릴 수 있으며, 무인비행선에 적재되는 페이로드(payload)의 하중을 늘릴 수 있는 기술이 개시된다.
Abstract:
A computer implemented method, apparatus, and computer usable program product for symmetric and anti-symmetric control of aircraft flight control surfaces to reduce wing-body loads. Commands are sent to symmetrically deploy outboard control surfaces to shift wing air-loads inboard based on airplane state and speed brake deployment. Surface rate retraction on a wing with peak loads is limited to reduce maximum loads due to wheel checkback accompanied by utilization of opposite wing control surfaces to retain roll characteristics. Airloads are shifted inboard on a swept wing to move the center of pressure forward, thereby reducing the tail load required to perform a positive gravity maneuver. In a negative gravity maneuver, speed brakes are retracted, thereby reducing the positive tail load and reducing the aft body design loads. High gain feedback commands are filtered from wing structural modes above one hertz by a set of linear and non-linear filters.
Abstract:
The invention relates to a method and a device for creating a continuous protected space along the path of an aircraft (1), in which protected space a maximum induced speed Vtc in a vortex (3) of radius Rtc in the wake of an aircraft (1) is decreased by increasing the radius Rtc. The method comprises - a preliminary step of identifying changes in the aerodynamic configurations of the aircraft (1) liable to initiate disruptions in the wake that will have the effect of increasing the radius Rtc, - for each change in configuration determining beforehand the characteristics of propagation of the wake disturbances in the vortex (3), - carrying out, along the course of the aircraft (1), at least two configuration changes separated by a distance such that spaces, in which the effects of the wake disturbances resulting from each of the configuration changes propagated for a predetermined length of time, forms a substantially continuous protected space
Abstract:
A method for vertical gust suppression due to turbulence for an aircraft having at least one of direct lift control surfaces or pitch control surfaces. The method includes sensing atmospheric turbulence, measuring the sensed atmospheric turbulence to generate turbulence data, generating a command based on the turbulence data, and applying the command to aircraft controls to actuate the direct lift control surfaces or the pitch control surfaces based on the turbulence data. Therefore, an aircraft response to the actuation of the direct lift control surfaces or the pitch control surfaces reduces a vertical acceleration, a pitch acceleration, a pitch rate, a pitch attitude or a structural load of the aircraft due to the turbulence. Thus, the method reduces the effects of vertical gusts of wind on the aircraft, improves the comfort level for aircraft passengers and crew, and reduces diversions the aircraft may take to avoid the turbulence.
Abstract:
The invention relates to a method for actuating an adjusting drive for adjusting an elevator (12) and an adjusting drive for adjusting a moveable tail (23) provided with the steps : Generation of an elevator command to actuate the elevator adjusting drive; Calculating a moveable tail command (IHCl) for actuating the moveable tail adjusting drive in such a manner that the moveable tail (23) is tracked to the elevator input signal (10); Depending on the adjusting states of the elevator (12) and/or the moveable tail (23) or flight states, retaining the adjusting state of the moveable tail adjusting drive or actuating the moveable tail adjusting drive with a moveable tail command (IHCMD) for changing the adjusting state of the moveable tail (23), during actuation of the elevator adjusting drive with an elevator command for changing the adjusting state of the elevator (23) and in the event of a deviation from the calculated moveable tail command (IHCl) and the commanded moveable tail command (IHCMD), acting upon the elevator command to compensate for retention of the adjusting state of the moveable tail adjusting drive and a control device for carrying out the method.
Abstract:
A flight control system includes a collective position command algorithm for a lift axis (collective pitch) which, in combination with an active collective system, provides a force feedback such that a pilot may seamlessly command vertical speed, flight path angle or directly change collective blade pitch. The collective position command algorithm utilizes displacement of the collective controller to command direct collective blade pitch change, while a constant force application to the collective controller within a "level flight" detent commands vertical velocity or flight path angle. The "level flight" detent provides a tactile cue for collective position to reference the aircraft level flight attitude without the pilot having to refer to the instruments and without excessive collective controller movement.
Abstract:
The movable surfaces affecting the camber of a wing are dynamically adjusted to optimize wing camber for optimum lift/drag ratios under changing conditions during a given flight phase. In a preferred embodiment, an add-on dynamic adjustment control module provides command signals for optimum positioning of trailing edge movable surfaces, i.e., inboard flaps, outboard flaps, ailerons, and flaperons, which are used in place of the predetermined positions of the standard flight control system. The dynamic adjustment control module utilizes inputs of changing aircraft conditions such as altitude, Mach number, weight, center of gravity, vertical speed and flight phase. The dynamic adjustment control module's commands for repositioning the movable surfaces of the wing are transmitted through the standard flight control system to actuators for moving the flight control surfaces.
Abstract:
The invention relates to an aerodynamic body (4) for applying to a carrier wing on which at least two flow flaps (5a, 5b) adjacently arranged in the longitudinal direction of the aerodynamic body are mounted, to a carrier wing comprising a main carrier wing (2) and the at least one additional aerodynamic body, and to a computer comprising an actuating drive control module which generates time-variable command signals for actuating drives. The actuating drive control module has a function which, when activated, generates at least two oscillatory command signals on each actuator drive, said signals being in opposition of phase. The invention also relates to a computer program for implementing in a computer with an actuating drive control module, to a method for influencing command signals for an actuating drive system, and to combinations of such a computer with an actuating drive control module, a carrier wing, and at least one actuating drive.