87 results about "Pitch movement" patented technology

The invention provides a digital ship model plane motion organization experimental method based on computation fluid dynamics CFD software FLUENT. The method includes applying a FLUENT pre-process software GAMBIT to establish a research object model and a control domain; arranging a triangle grid on the model surface, then arranging a unstructured grid in the control domain; setting the boundary condition, joining an user-defined function UDF document, introducing dynamic grid technology, using a finite volume method based on the complete unstructured grid, realizing a pure swaying movement, a pure rising and falling movement, a pure oscillatory movement, a pure pitching movement and a pure rolling movement carried on by a plane motion organization experiment; applying a science computation software MATLAB to do Fourier expansion of a force and a moment coefficient obtained by the FLUENT, being fitted by EXCEL least squares method, obtaining a hydrodynamic force coefficient of a vertical plane and a horizontal plane as well as the related hydrodynamics analysis by dimensionless. The invention carries on the digit plane motion organization experiment using the CFD software, can satisfy the request of hydrodynamic force data in the design initial period of a submersible.

The invention provides a rehabilitation chair for the upper limbs and the lower limbs. The rehabilitation chair comprises a chair frame, a motor, a lower-limb rehabilitation mechanism and an upper-limb rehabilitation mechanism, wherein the lower-limb rehabilitation mechanism comprises a motor, belt wheels, belts, a transmission shaft, pedal plates, a crankshaft assembly and sliding blocks and the like; the upper-limb rehabilitation mechanism comprises belt wheels, belts, cranks, connecting rods, sliding blocks, sliding rails and a handle and the like; the motor drives the transmission shaft by a belt-wheel transmission mechanism; the belt wheels are arranged at the middle part of the transmission shaft and drive the crankshaft to rotate by belt transmission; the rotation of the crankshaft drives the pedal plates to do certain-angle pitching movement around the installing axis of the top end so as to drive the lower limbs to do rehabilitation movement; and the two ends of the transmission shaft are respectively provided with the belt wheels to drive a belt transmission mechanism and drive the cranks to rotate; the connecting rods drive the sliding blocks to do reciprocating linear movement along the sliding rails; hand-held plates and the handle are fixed on the sliding blocks so as to drive the upper limbs to do reciprocating rehabilitation movement. The rehabilitation chair provided by the invention has the advantages that the structure is simple, the use is convenient, and the simultaneous rehabilitation function of the upper limbs and the lower limbs is realized by a single power source, so that the rehabilitation chair is suitable for being promoted and applied.

The invention discloses a high-rigidity and anti-deformation hydraulic driving mechanical arm which comprises a rotating base, a large arm body, a second arm body, a third arm body, a wrist and a handgrip. The rotating base is driven by rotating motors to rotate, and the rotating base is hinged to the large arm through a hinging point; the large arm can achieve vertical pitching movement and is hinged to the second arm body; through stretching-out and drawing-back of a hydraulic cylinder, the second arm body makes pitching movement around the large arm; the second arm body is slidably connected with the third arm body, and through stretching-out and drawing-back of the hydraulic cylinder, the third arm body makes linear movement; and the third arm body is hinged to the wrist, the tail endof the wrist is connected with the hand grip, and the hand grip can rotate around the wrist. Through pitching and swing movement of the rotating base, the large arm body, the second arm body, the third arm body and the wrist, grabbing and loosening of the hand grip in any position in the space can be finally achieved.

The invention discloses a driving device for a solar cell array, which comprises: an A-axis mechanism driving rolling rotation and a B-axis mechanism driving pitching motion. The A-axis mechanism includes: an A-axis motor, a reducer, and a drive shaft, and a power and signal transmission device is arranged on one side of the drive shaft. The transmission of the A-axis motor through the drive shaft enables the solar array to achieve directional tracking of the rolling direction to the sun within the range of ±360°. The B-axis mechanism includes: a B-axis motor, a reducer, and a flexible spline of the reducer is connected in rotation with a support shaft. In the B-axis mechanism, the motor is decelerated by the reducer and the torque is amplified, so that the solar array can realize the sun orientation in the pitch direction within the range of ±90°. The invention solves the problem that the solar battery array cannot always be aligned with the sun's rays, and achieves beneficial effects of improving electric energy transmission and tracking precision.

A wind turbine rotor blade assembly includes a rotor blade having a pressure side, a suction side, a leading edge, and a trailing edge extending in a generally span-wise direction between a tip and a root. An edge extension is attached along either or both of the leading edge or trailing edge in a generally span-wise direction from adjacent the root towards the blade tip, with the edge extension having a contoured outer surface that defines a generally continuous aerodynamic surface. The edge extension has a terminal end that is spaced from root. A curtain is attached to the edge extension and extends in a span-wise direction from the terminal end t to the root. The curtain is formed from a pliant, flexible material that accommodates connection of the root to a rotor hub, as well as pitch movement of the rotor blade relative to the hub.

A three-degree-of-freedom high-altitude mounting manipulator for large plates is characterized by comprising four vacuum suckers, a sucker rack, a main electric pushing rod, a main electric pushing rod rack, a main support arm, a rotary lead screw pushing rod, an oscillating screw rod pushing rod, a pitching support plate, an oscillating support plate, a spindle, a planar connecting rod and a vacuum pump matched with the vacuum suckers, wherein the bottom edge of the sucker rack can rotate relative to a horizontal plane for +/-20 degrees; when a push rod body of the rotary lead screw push rod extends and retracts, the oscillating support plate is driven to oscillate relative to the pitching support plate by taking a pivot body of a pivot connecting mechanism as a rotation axis, and the maximum included angles between the oscillating support plate and the left and right ends of the pitching support plate are 20 degrees; when a push rod body of the main electric push rod extends and retracts, the pitching support plate is driven to perform pitching movement of 80 degrees.

The invention discloses a disturbance compensation device (5) of a two-axle balance ring frame, which is arranged at an external frame axle (9) of the balance ring frame; A motor (2) is coaxially arranged at an internal frame axle (7) with A potentiometer (2A), and the A motor (2) is used for driving the internal frame axle (7) to rotate, thus realizing the pitching movements of a camera (1), and the A potentiometer (2A) is used for producing an internal frame rotation angle Theta7 under the rotating state of the sensitive internal frame axle (7); B motor (3) is coaxially arranged at the external frame axle (9) with B potentiometer (3A), and used for driving the external frame axle (9) to rotate, thus realizing the orientation movements of the camera (1), and the B potentiometer (3A) is used for producing an external frame rotation angle Theta9 under the rotating state of the sensitive external frame axle (9); then a method of coordinate transform is adopted to convert the triaxial angular velocity of an aircraft to the coordinate system of an optical axle of the camera, and then by using the fusion to distribution of F3, three components of the triaxial angular velocity of the aircraft are fused and distributed so as to separate the coupling disturbance caused by the movements of the aircraft to the optical axle of the camera, thus leading the optical axle of the camera to keep stable.

The invention relates to a large scale redundancy manipulator used for handling explosion and rescuing, pertaining to the technical field of mechanical engineering. In the invention, a lumbar mechanism, a large arm, a mid-arm, a small arm, a wrist mechanism and a paw are connected in series, thus obtaining a wingspan not more than 5 metres. The large arm realizes pitching movement relative to the lumbar mechanism under the action of a first push rod; the mid-arm realizes the pitching movement relative to the large arm under the action of a second push rod; the small arm realizes the pitching movement relative to the mid-arm under the action of a third push rod; the wrist mechanism realizes the pitching movement relative to the small arm under the action of a forth push rod; the paw which is driven by the wrist mechanism turns around relative to the wrist mechanism; 7 degrees of freedom are provided including the paw. The invention realizes the manipulator with high load, large wingspan, high redundancy and high precision, provides possibility for solving the problem of energy supply for long-term working and has high applicability in dangerous and complicated fields such as explosion disposal and rescuing.

The invention discloses a rollover movement control method of a multi-joint dolphin robot. A control method and achieving steps of front rollover movements and rear rollover movements of the dolphin robot are provided by performing theoretical analysis and system research on the front rollover movements and the rear rollover movements of the dolphin robot and combining a propulsion mechanism of movements of a dolphin. Due to the fact that the front rollover movements and the rear rollover movements of the dolphin robot belong to pitching movements of the dolphin, first the pitching movements of the dolphin are analyzed and divided into a bending stage and an stretching stage, the bending stage and the stretching stage are respectively analyzed, a calculation formula of a joint turning angle and a movement path of joints during the pitching movements are provided, and movements of pitching joints of the dolphin robot are controlled. The rollover movement control method of the multi-joint dolphin robot can accurately control a pitch angle of the dolphin robot during the movements, and achieves accuracy of pitching movement control of the dolphin robot.

A pitch system locking arrangement is provided. A rotor of a wind turbine is disclosed with a pitch system locking arrangement to lock the position of a wind turbine rotor blade. A rotor comprises a rotor hub and a rotor blade, whereby the rotor blade is connected to the hub via a bearing, to be rotatable in respect to the hub in a pitch movement. The rotor blade comprises a root section, and the root section comprises a plate, that at least partially covers the cross section of the rotor blade. A certain predetermined rotational position of the rotor blade in respect to the hub 1 is a locked position. The hub includes a locking pawl. The plate comprises an opening, and the locking pawl is at least partially located in the opening of the plate, when the rotor blade is in the locked position.

An implement pitch-yaw system for effectively and efficiently controlling the pitch of an implement. The implement pitch-yaw system includes a first yaw actuator and a second yaw actuator attached between an implement structure pivotally attached to a support structure and a connecting member slidably attached to the support structure, and a pitch actuator attached between the connecting member and the support structure. The extension/retraction of the pitch actuator moves the yaw actuators accordingly thereby creating the desired pitch movement for the implement structure.

A method and apparatus comprising a refueling controller. The refueling controller is configured to receive a number of operator commands for moving a refueling boom on a tanker aircraft in a desired direction. The number of operator commands defines at least one of an azimuth movement and an elevation movement of the refueling boom during flight of the tanker aircraft. The refueling controller is further configured to generate a number of intermediate commands for moving the refueling boom in the desired direction as defined by the number of operator commands. The number of intermediate commands defines at least one of a roll movement and a pitch movement such that the refueling boom moves in the desired direction.

A suspension for a cab base on the frame of a swather tractor includes four dampened springs at the four corners with three links each pivoted on one end of the frame and the other end on the base. The links include two parallel links in the fore and aft direction parallel to the mechanical speed control link arm and one side to side link which constrain movement of the base against fore and aft movement and side to side movement parallel to the mechanical steering control link arm. This arrangement restricts movement of the base while allowing roll and pitch movements of the cab structure with the links arranged such that steering and ground speed are substantially unaffected when the cab moves on the suspension.

The invention discloses a micrometer precise holder motion control device. The control device is composed of a shell, and an orientation driving component, a pitching driving part, a north part, a control part, a network communication part and a power supply management part arranged in the shell. The invention further discloses a control method of the control device. The control method comprises path planning, motion control and motion compensation. Through the path planning, a motion path is segmented, and for different path segments, different motion control algorithms are adopted: at the beginning, a relatively low starting speed is adopted for preventing the step-out of the motor, and by loading a driving force, a maximum speed is reached within the shortest time; at a high-speed motion stage, a uniform motion is performed at the maximum motion speed to guarantee the minimum motion time, so that the motion control time of a micrometer holder is optimized; and finally for a pitchingmotion, a lost motion position error of the holder caused by the influence of a load torque is eliminated through a compensation algorithm, so that the motion control precision of the holder is improved.

An accumulator is provided in an oil circuit of the pressure supply device and has a gas chamber for storing the pressure generated by the oil pump. A gas pressure judgment unit judges a soundness on the gas pressure of the gas chamber of the accumulator. A pitch movement judgment unit judges whether the pitch movement is performed soundly by the oil pressure accumulated in the accumulator if the gas pressure judgment unit judges that the gas pressure is sound. A start judgment unit judges a start condition to start the gas pressure judgment unit every predetermined period or when a start switch is operated.

The invention discloses an automobile inertial parameter measurement test bed and an automobile inertial parameter dynamic calculation method. The automobile inertial parameter measurement test bed comprises a supporting system, a loading system, a measuring system, a movement platform system and a control calculation system. The supporting system supports an automobile to be measured and the loading system. Three electric cylinders of the loading system drive the movement platform system, so that the movement platform system rotates around the X axis, the Y axis and the Z axis respectively. The measuring system measures the rotating angles and the driving force of the automobile to be tested under different movement working conditions. The control calculation system drives the loading system to load the automobile to be measured, collects signals obtained by the measuring system, and calculates the signals. According to the automobile inertial parameter measurement test bed and the automobile inertial parameter dynamic calculation method, a unique double-hinged-fork mechanism is adopted to transmit the driving force of the electric cylinders in the process of pitching movement or yaw movement, and the inertial parameters of the automobile are dynamically solved through sinusoidal motion. The automobile inertial parameter measurement test bed has the advantages of being simple in structure, low in cost and high in measurement precision.

The invention provides an under-ship-movement trigger signal self-trigger device for ship stern flow field PIV measurement in waves and a measurement method. The under-ship-movement trigger signal self-trigger device comprises a PIV data acquisition and signal conditioning computer, a laser sensor, a PIV measurement system, a laser signal receiving and signal triggering mark plate, a signal synchronizer, a ship model movement sinking-merging rod and a pitch angle shaft encoder, wherein the pitch angle shaft encoder is arranged on a ship model, the ship model movement sinking-merging rod is arranged above the pitch angle shaft encoder, and the laser signal receiving and signal triggering mark plate is arranged on the ship model movement sinking-merging rod. When laser light signals transmitted by the laser sensor pass through a silver mark line on the mark plate, a signal trigger access is formed, trigger signals are sent to the synchronizer, the synchronizer receives signals sent during pitch movements and sinking-merging movements and triggers the PIV flow field measurement system, and the PIV flow field measurement system begins to work and acquires pictures. The under-ship-movement trigger signal self-trigger device is used for avoiding the problem that man-made signal trigger and interference and movement positions are desynchronized with measurement positions.

A device for coupling the roof area of two articulated vehicle parts, for limiting the roll and/or pitch movements of the vehicle parts relative to each other. The device includes at least two consoles. At least one console is disposed on the roof area of a first vehicle part. The at least two consoles are connected to each other by a coupling arm. At least one of the consoles includes a leaf spring.