446 results about "Altitude control" patented technology

A HGA comprises a slider, a suspension to load the slider, a flying height controller for controlling flying height of the slider; and a flexible cable to be electrically connected with the slider and the flying height controller. In the present invention, the flying height controller comprises at least one piezoelectric piece disposed between the slider and the suspension. The HGA further comprises ACF to connect the flying height controller with the suspension and the flexible cable. The invention also discloses a disk drive unit with the HGA, a method for flying height control with the HGA, and a system for controlling flying height.

An unmanned helicopter includes an altitude control device for giving a command of a collective pitch blade angle based on an altitude change rate command, etc., and performing altitude control of an airframe and takeoff device, upon reception of a takeoff start command from the ground, for causing the airframe to take off and climbing the airframe to a first altitude while increasing the collective pitch blade angle without performing the altitude control of the altitude control device and then causing the altitude control device to start the altitude control. The unmanned helicopter further includes descending device for causing the airframe to descend to a second altitude while changing descent rate command of the altitude control device and giving a descent rate command smaller than the descent rate command to the second altitude to the altitude control device for causing the airframe to descend from the second altitude to the ground.

The invention provides a water outlet control method and system of a drinking water supply device. The water outlet control method includes the steps of obtaining echo signals detected by ultrasonic wave sensors, wherein the ultrasonic wave sensors are arranged on a water outlet of the drinking water supply device; judging whether a water container is arranged between the water outlet and a shelf or not according to the echo signals and the distance between the pre-stored ultrasonic wave sensors and the shelf of the drinking water supply device; if the water container is arranged between the water outlet and the shelf, determining the height of the container edge of the water container according to the echo signals and the distance; determining the height of the surface of water in the water container according to the echo signals and the distance; and controlling the water outlet of the drinking water supply device according to the height of the container edge and the height of the surface of the water. A user can conveniently use the drinking water supply device like a water dispenser, a water purification machine and the like by adopting the water outlet control method and system; in addition, the water outlet control method and system can be suitable for various water containers with uncertain volumes according to the scheme of the invention.

A head for use in accessing data from an electrically conductive media surface is provided. The head has a slider body defining a bearing plane configured to face the media surface. A fly height control electrode is positioned on the raised portion. Further, the fly height control electrode and the media surface are adapted to form opposing plates of a capacitor with a dielectric layer of air supporting the head. Also, the fly height control electrode is electrically isolated from the slider body. A head electrical connection disposed on the slider body is electrically connected to the fly height control electrode. The head electrical connection is adapted to provide a fly height control voltage to the fly height control electrode.

In an example embodiment, a system for providing a height change command for an implement, comprises a height control module configured to interact with a computer, and configured to receive topographical data, provide a virtual field map based on said topographical data, provide a forward view polygon for an implement based on said virtual field map, and provide a height change command for said implement based on said forward view polygon and an implement control unit configured to receive said height change command and control movement of said implement.

An extremely large aircraft which is suitable for overseas cargo transport and which includes a fuselage defining a central storage cavity, a wing assembly defining a pair of wing storage cavities, an altitude control system, and a plurality of independently steerable landing gear units. The central storage cavity has a length, height and width of at least 100 feet, at least 16 feet and at least 24 feet, respectively. The wing assembly has a wingspan of at least 300 feet and is configured with a moderate aspect ratio to permit both ground-effect and high altitude operation. The altitude control system controls the aircraft in ground effect such that the aircraft is maintained at about a predetermined altitude. The landing gear units are coupled to the fuselage and are arranged in at least two discrete columns and at least ten discrete rows. The central storage cavity and the wing storage cavities are configured to receive cargo including intermodal re-usable cargo containers.

An agricultural vehicle comprises a chassis, a header carried by the chassis, an actuator system including a plurality of actuators linked to a frame of the header and configured to adjust an orientation of the header, a GPS device configured to output a GPS position of the vehicle, and a controller. The header includes a frame and one or more sensors carried by the frame. The controller is electrically coupled to the one or more sensors, the actuator system, and the GPS device. The controller is configured to receive from a memory a final orientation of the header associated with a GPS position at a second location on a last pass that is closest in distance to a GPS position at an upcoming location on the current pass, and activate one or more actuators to re-orient the header before the vehicle arrives at the upcoming location.

Provided is a bridge inspection robot which is capable of climbing over an obstacle, the bridge inspection robot including: a climbing-over portion (110) which is extended to correspond to a gap distance between a flange (1 Ia) of a first girder (11) and a flange (12a) of a first girder (12) which are provided at the upper side of a pier (L) of a bridge (10) in which a robot main body (101) climbs up/down or avoids and climbs over an obstacle, when the robot main body (101) moves on the flange, for example, along a bridge inspection path; an obstacle detection portion (120) which detects the obstacle which exists on the flanges; a photographing altitude control portion (150) which detects an altitude change of an image photographing portion (130) according to height of the obstacle when the robot main body (101) climbs up/down or avoids and climbs over the obstacle, and adjusts a photographing height of the image photographing portion (130) so as to correspond to the altitude change, to thus have a z-axis coordinate of an identical height all the time; a position calculation portion (160) which measures a mobile position of the robot main body (101) which corresponds to a consecutive image

A flight control system and method for controlling the vertical flight path of an aircraft, the flight control system includes a stable decoupled model having a decoupled lateral equation of motion and a decoupled longitudinal equation of motion and a feedback command loop operably associated with the stable decoupled model. The feedback command loop includes a vertical flight path angle control law; an altitude control law; and a vertical speed control law.

A control mechanism for a powered running board on an automotive vehicle, such as a sport utility vehicle, utilizes the memory function of the vehicle to store therein established operating positions for the running board. The user or occupant of the vehicle can manually position the powered running board to a convenient operating position within a range of available operating positions on the vehicle. By storing the selected position of the running board in the memory function of the vehicle, the control mechanism can return to that same operating height each time the occupant seeks to use the running board for entry or exit of the vehicle. The control mechanism is operable with different configurations of running boards and with different power devices for effecting the movement of the running board.

The invention relates to a fault-tolerant anti-interference control method for a multisource interference system. Aiming at the multisource interference system containing time-varying faults, modeling interference and non-modeling random interference, a fault-tolerant anti-interference controller is designed. The fault-tolerant anti-interference control method comprises the following steps of: firstly, designing a fault diagnosis observer to estimate and counteract the time-varying faults in the system; secondly, designing an interference observer to estimate and counteract the modeling interference in the multisource interference system; thirdly, designing a robust H infinity state feedback controller to inhibit the non-modeling random interference, fault estimation errors and interference estimation errors in the multisource interference system; and finally, designing the fault-tolerant anti-interference controller based on the fault diagnosis observer, the interference observer and the robust H infinity state feedback controller. The method has the advantages of high anti-interference performance, significant fault-tolerant performance, high working reliability and the like and can be used for altitude control subsystems in the fields of aviation and aerospace.

An agricultural vehicle includes a chassis and a header system carried by the chassis. The header system includes a frame; a cutter carried by the frame; a cutter sensor associated with the cutter which outputs a cutter height signal; a gauge wheel carried by the frame behind the cutter; a wheel sensor associated with the gauge wheel which outputs a wheel position signal; an actuator system including actuators which can adjust a height and/or a tilt angle of the frame; and a controller electrically coupled to the cutter height sensor, the wheel sensor and the actuator system. The controller is configured to: receive the cutter height signal; receive the wheel position signal; compare the cutter height signal and the wheel position signal to determine a terrain irregularity is present; and activate one or more actuators to adjust the frame in response to determining the terrain irregularity is present.

A roadable, adaptable-modular, multiphibious-amphibious ground-effect or flying, car-boat-plane or surface-effect motorcycle. A pivoting wing using the NACA 23112 airfoil provides longitudinal stability through changes in wing or power settings. The airfoil can also be “locked” in place to provide conventional aircraft type controls. The wings fold for driving mode or can be removed. Surface-effect sensor rods provide the automatic altitude control for operations in surface-effect mode. Horizontal stabilizer and elevator provide trim and balance to level the vehicle for passenger comfort and optimal landing attitude. The hull/fuselage consists of three main modules: The main central module (engine, transmission, passengers, wings and cargo storage), the forward module and the aft module which may include one or two wheels with or without a motor, engine, batteries or fuel and differential.

The invention provides a modular micro-satellite platform configuration, which comprises a bottom plate, a top plate, a first side plate, a second side plate, a third side plate, a fourth side plate, a payload interface module, a satellite and rocket docking module, an altitude control and integration electronic module, a mechanical solar wing module, a propelling module, an integrated solar cell array module and a power supply and distribution module, wherein each side plate is connected with the bottom plate and the top plate respectively, and each of the second and fourth side plates has an embedded frame structure to form a box plate type configuration structure with embedded frames; the satellite and rocket docking module is connected with the bottom plate; the integrated solar cell array module is connected with the top plate; the payload interface module is connected with the first side plate; the altitude control and integration electronic module is connected to the embedded frame of the second side plate; the propelling module is connected with the third side plate; the power supply and distribution module is connected to the embedded frame of the fourth side plate; the mechanical solar wing module is connected to the second and fourth side plates respectively. The modular micro-satellite platform configuration has the advantages of light weight, high bearing capacity, short production cycle and high reliability and universality.

The invention discloses a height control method and a height control system for an aerial vehicle. The height control method comprises the steps of 1), arranging a radar, an accelerometer, a barometer and a GPS module in the aerial vehicle; 2), in the flight process of the aerial vehicle, if the aerial vehicle is in an effective detecting range of the radar, the accelerometer, the barometer and the GPS module and performing fusion, performing fusion on the fused result and information detected by the radar; otherwise, performing data fusion processing based on the accelerometer, the barometer and the GPS module; and obtaining a current height, a current vertical speed and a current vertical acceleration; and 3), performing height control on the aerial vehicle according to the obtained current height, the current vertical speed and the current vertical acceleration. The height control system comprises a detecting module, an information fusion module and a height control module. The height control method and the height control system have advantages of simple control realization, high control precision, high stability, high adaptability, etc.

A fly height controller circuit for a disk drive head having a resistive heater is disclosed. The fly height controller includes an error amplifier that controls a variable current source driving the resistive heater. The error amplifier compares a desired heater power signal with a feedback power signal that is generated by a multiplier. The multiplier receives a signal corresponding to the resistive heater current, for example as generated by a second variable current source also controlled by the error amplifier, and a signal corresponding to a voltage across the resistive heater. A first differential amplifier develops a differential voltage corresponding to the heater voltage. A second differential amplifier is biased by the resistive heater current signal, and receives the differential voltage form the first differential amplifier. A differential current generated by the second differential amplifier produces the feedback power signal as an output voltage.

The invention discloses a rotary control solid attitude and orbit control engine which comprises an outer aircraft shell, an orbit control power system and an altitude control power system. Each orbit control engine comprises an orbit control engine shell, an orbit control engine insulating layer, an orbit control engine grain, an orbit control fuel gas 90-degree pipeline and an orbit control engine jet pipe, wherein the orbit control engine shell adheres to the orbit control engine insulating layer, the orbit control engine insulating layer adheres to the orbit control engine grain, one end of the orbit control fuel gas 90-degree pipeline is connected with an eccentric fuel gas channel of the orbit control engine shell, the other end of the orbit control fuel gas 90-degree pipeline is connected with the orbit control engine jet pipe, and the orbit control engine jet pipe is located on the mass center plane of the engine. The orbit control power system comprises two or more orbit control engines. The altitude control power system comprises three or more altitude control engines. Upper output shafts of the altitude control engines are connected with inner rings of upper altitude control rolling bearings, the outer rings of the upper altitude control rolling bearings are fixedly connected with upper altitude control engine supports, and orbit control engine supports are fixedly connected with the outer aircraft shell. The rotary control solid attitude and orbit control engine is low in technical difficulty, high in feasibility, simple in structure, high in reliability and flexible in form.

A vehicle height controlling suspension apparatus having a signal-freeze determining function includes a plurality of vehicle height sensors to measure the height of a vehicle. Vehicle height adjusting actuators are driven to adjust the height of the vehicle. An electronic control unit (ECU) is configured to perform adjustment of the height of the vehicle by the actuators by calculating a vehicle height variation value from vehicle height signals of the plurality of vehicle height sensors and compare the calculated vehicle height variation value with a reference value to determine whether the signals are frozen.

A method and apparatus for controlling a height of an agricultural equipment component is provided. An average crop height is determined. In one embodiment, the agricultural equipment component is controlled to maintain a predetermined distance from a current top of crop level. If a current top of crop level cannot be determined, a virtual top of crop level is calculated using the average crop height value. The agricultural equipment component is controlled to maintain a predetermined distance from the virtual top of crop level. In another embodiment, the agricultural equipment component is controlled to maintain a predetermined distance from current ground level. If a current ground level cannot be determined, a virtual ground level is calculated using the average crop height value. The agricultural equipment component is controlled to maintain a predetermined distance from said virtual ground level. An ultrasonic sensor is also provided.

A height control valve for controlling the relative height between a vehicle frame and a trailing arm suspension. The height control valve comprises a housing defining an interior chamber and having an inlet port fluidly connecting to a source of pressurized air. An air spring port is provided in the housing for fluidly connecting to an air spring. Additionally, an exhaust port is provided in the housing for fluidly connecting to the atmosphere. A valve is disposed within the interior chamber and is selectively operable between a fill position, an exhaust position, and a neutral position.