486 results about "Servo actuator" patented technology

A system for enabling the hearing impaired comprises a plurality of servo actuators each associated with a particular segment of a predetermined frequency domain. The servo actuators drive tactile stimulators which engage the skin of the hearing impaired person in patterns that are unique to individual inputs thereby enabling the hearing impaired person to “hear” signals within the defined frequency domain. An electromechanical system for enabling the visually impaired comprises a two dimension array of servo actuators which respond to optical sensors and which actuate tactile stimulators thereby identifying objects in the path of the visually impaired person.

An avionics system for a mechanically-controlled aircraft configured to provide envelope protection for deterring a pilot from flying outside of acceptable flight parameter limits for flight parameters such as banking angle, pitch attitude, g loading, proximity to terrain and / or obstacles, angle of attack, and / or airspeed. The avionics system may comprise at least one servo actuator and a computing device. The computing device may engage envelope protection by engaging the at least one servo actuator if the aircraft reaches a maximum or minimum limit for any of the flight parameters, such that the at least one servo actuator provides a force to urge a flight control device in a direction to bring the aircraft back within the acceptable flight parameter limits. The servo actuator may be disengaged when the aircraft flight parameters reach an end value corresponding to the start value that triggered envelope protection to engage.

A robotic life form simulates a live creature responsive to a changing environment sensed by the robot, and has a robotic body that is articulated for motion around an upright axis and supported by at least two legs, each having at least two joints. The neck of the body terminates in a head provided with eyes and a mouth, and, in the illustrated creature, has a tail. Internal and external input sensors are located on the robotic body and responsive to touch, sound and lighting conditions, motion, food, temperature, voice commands, time of day, and obstacles and hazards, and include a head touch sensor, a plurality of touch sensors extending along a torso of the body, and a plurality of touch sensors on the feet. Actuators responsive to the input sensors control the eyes of the robot, opening and closing of its mouth, movement of the head, movement of the neck relative to the torso, and relative movements of the front and rear sections of the torso to cause the torso to pivot and twist and thereby provide lifelike responses to the sensed conditions. Drive index levels in accordance with priority criteria selected from a plurality of animation groups determine the drive index levels, and servo actuators associated with the body are responsive to dominant drive indexes causing the robot to execute animations resulting therefrom.

A master ECU instructs door actuators having a counter value of θ n (where n=1,2,3) to set the address n as their unique network addresses. A control unit in each door servo actuator determines whether a counter value (θ n) that is the subject of a query from the master ECU corresponds to its own counter value, and the control unit sets the address n, when the control unit determines that the counter value (θ n) of the query corresponds to its own counter value. The counter value (θ n) is a unique quantity associated with each servo actuator

The invention discloses a vehicle shock-absorber double-acting endurance test apparatus, comprising a hydraulic servo actuator, a hydraulic servo controller and a test bracket. The hydraulic servo controller comprises a system controlling a waveform formed by folding two sine waves with the different frequencies and swings; the hydraulic servo controller is connected with the hydraulic servo actuator; the test bracket comprises a gantry and the hydraulic servo actuator is fixed on a beam of the gantry; and the hydraulic cylinder of the hydraulic servo actuator is arranged downward and a power output shaft is fixed with the upper end of the shock-absorber to be tested and the lower end of the tested shock-absorber is fixed under the gantry. The invention can respectively brings an action with different frequencies and swings to the upper and lower ends of the shock-absorber to respectively simulate the movement of wheels and vehicle body; and the control precision is high and the noise is lower.

The invention relates to a steel-concrete composite column anti-seismic anti-torsion test loading device and a manufacturing method thereof, and belongs to the technical field of structure engineering. The steel-concrete composite column anti-seismic anti-torsion test loading device comprises a loading frame, a top beam, a base, an antifriction plate, a thrust jack, and two electro-hydraulic servo actuators. The loading frame is obtained by welding steel plates. All column bases of the loading frame are provided with bolt holes and are fixedly connected to the ground by ground anchor bolts. The top beam is obtained by welding steel plates. The bottom of the top beam is provided with bolt holes and is fixedly connected to a top steel plate of a test piece by bolts. The base is obtained by welding steel plates. The top of the base is provided with bolt holes and is connected to a bottom steel plate of the test piece by bolts. An upper end of the thrust jack is connected to the loading frame by a rolling bearing. The antifriction plate is horizontally arranged in the center of the top of the top beam. The electro-hydraulic servo actuators are arranged horizontally and are fixedly connected to the top beam. The steel-concrete composite column anti-seismic anti-torsion test loading device solves the problem of the prior art, has a simple structure, is convenient for use, has strong universality, can be used for anti-seismic anti-torsion tests on various steel-concrete composite columns, and has wide application prospects.

A linear actuator is provided with an integral permanent magnet, brushless motor capable of axial, self adjustment of the rotor position within the stator for field weakening. Axial displacement of the rotor within the stator allows for significantly improved speed performance from aligned rotor / stator components during light axial loading. Upon contact with a load, the screw and nut, as an integral part of the motor rotor, self align to fully engage within the stator for generation of high forces with minimal current. This axial shift can further be used as a high precision, low cost measure of the force applied for quality assurance purposes.

An improved energy efficient intelligent pulser driver used for generating a mud pulse in a MWD (measurement while drilling) application. In the pulser driver, a direct current (DC) powered control circuit activates a three-phase DC brushless motor that operates a servo-valve. Opening of the servo-valve equalizes pressure in a plenum causing the operation of a main valve reducing flow area and causing a pressure spike in the mud column. Closing of the servo-valve creates a reduction in mud pressure that operates the main valve and increases the flow area causing an end to the pressure spike. The servo-valve is powered both in opening and closing operations by the motor.

A loading device applicable to a space specially-shaped column node test comprises a specially-shaped column structure of a test node, wherein the specially-shaped column structure of the test node is arranged in a loading device composed of a reaction force wall, a ground groove, a column top reaction force steel frame, a beam end reaction force steel frame and an electro-hydraulic servo actuator. A rolling shaft spherical hinge device is arranged below the column top reaction force steel frame, and a hydraulic jack is arranged on the lower portion of the rolling shaft spherical hinge device to be used for applying axial pressure to a specially-shaped column. A column bottom hinged support is arranged at the bottom of the specially-shaped column, and each beam end loading point of the beam end reaction force steel frame is provided with a beam end hinged support. The electro-hydraulic servo actuator is installed on the top of the specially-shaped column. According to the loading device applicable to the space specially-shaped column node test, a column end loading mode is adopted to coordinate with the whole set of loading device to form a bi-directional repeated loading force-bearing condition. A force-bearing mechanism coincides with an actual situation, and loading requirements of the space specially-shaped column structure node test with different sections such as T-shaped, L-shaped and cross-shaped can be met. Different-angle loading schemes can be achieved through adjustment of the position of the beam end reaction force steel frame.

The invention relates to an undercarriage test load loading device. A through hole for installing an FZ loading connector and an FX loading hole for installing an FX loading connector are formed in an upper part of a loading fake wheel; one end of an FZ loading lug is connected to the FZ loading connector, and the other end of the FZ loading lug is connected to one end of a hydraulic servo actuator cylinder; the other end of the hydraulic servo actuator cylinder is arranged on a vertical column; a shaft sleeve hole for arranging the loading fake wheel on a wheel shaft of an undercarriage and a PX loading hole for installing a PX loading lug are formed in a lower part of the loading fake wheel; a PY loading hole for installing a PY loading lug is formed in the bottom of the loading fake wheel; a chain is connected to the PY loading lug; and force sensors are arranged on the upper parts of the hydraulic servo actuator cylinder and the chain. The loading fake wheel replaces an airplane wheel so as to satisfy the loading demand of a test, a connection between the loading fake wheel and the undercarriage is consistent with a connection between a real airplane wheel and the undercarriage, the transmission path of the load is constant, the accuracy of a test result will not be affected, and the loading demands of different testes in different directions can be met.

The invention relates to a rotary inertia identification method of an alternating-current servomechanism, the load inertia and the rotor inertia of a motor are regarded as a whole inertia, a servo system does an accelerated motion and a decelerated motion, so as to obtain the system output torque and the motor average rotate speed for a period of time. The average torque of the servo system can be obtained by the system output torque, the value of the whole inertia can be obtained according to the motor average rotate speed, the average torque of the servo system, and the total operation time of the accelerated motion and the decelerated motion of the system, that is, the rotary inertia of the alternating-current servomechanism can be identified. The invention does not need to singly identify the load inertia or the load torque for identifying the system rotary inertia, but causes the load inertia and the motor rotary inertia to be regarded as an inertia, and the identification of the system rotary inertia can be realized by combining the system output torque. The implementation of the method is simple, the use is convenient, the identified inertia precision is higher, and the method can be applied to the servo system inertia detection of a permanent magnetism synchronous servo-actuator.

The invention relates to a multi-station numerical control engraving machine comprising a machine body (1), an engraving machine portion and an electric portion, wherein the electric portion comprises a software portion and a hardware portion, the hardware portion employs a control core combined by an industrial control computer and a movement control card, the movement control card is connected with a digital servo-actuator or multi-shaft stepping motor which are controlled by the movement control card by data wire, the software employs an application running under Visual C++ program Windows 2000 XP and an application of 51 single chip computer, the engraving machine portion is mainly composed of an engraving head (10), a multi-station tool device (11) and a tool setting and feeding device, the engraving head uses a brushless direct current motor (9) to drive the central axis. The multi-station numerical control engraving machine can simultaneously engrave various Chinese characters, curves and patterns with single line or double line on cylindrical surfaces, conical surfaces and geometric plane surfaces at multiple stations, and additionally engraving patterns and characters can be edited and designed by users.

A printing register detection method includes the following steps: (1) printing required various color registered graphs on printed matter; (2) grasp shooting the printing registered graphs through cameras installed on the printer in the printing process, and transmitting the information to computer; (3) digital anglicizing the grasp shooted registered graphs by computer, calculating various color chromatic error, and transmitting the error data to the servo-actuator of printer to correcting the error; after several timely capture images properly, calculating error and error correction, then the printing register achieves best status. The method has convenient operation, can fast and accurately detect chromatic error, the detection effect is audio-visual and clean; it can complete vertical and horizontal two directions error detection once and has a very good extension value.

The invention provides a multifunctional three-dimensional model testing platform for a roadbed slope and underground engineering. The multifunctional three-dimensional model testing platform is composed of an underground groove body, a ground reaction wall, a ground groove body, a servo actuator, a loading plate, a middle separation plate, an underground water system and an artificial rainfall system, wherein the ground reaction wall is located at one end of the underground groove body; the ground groove body is mounted on the side wall of the underground groove body; the servo actuator is arranged between the ground reaction wall and the ground groove body; the underground water system is arranged in the ground groove; the artificial rainfall system and a shower nozzle are arranged above the ground groove body. The construction of the multifunctional three-dimensional model testing platform for the roadbed slope and the underground engineering can further improve an existing large-size foundation and slope model testing system, so as to provide a good testing platform for a large-scale model test of engineering projects including roadbed slope supporting structures, foundation treatment, tunnels, foundation pits and the like; the construction cost is reduced and the model testing efficiency is improved.

A double-layer beam warper, comprising machine head, left wallboard of machine head, electromotor, middle wallboard, tail wallboard, servo-actuator, ball screw, contains connecting rod mechanism, double layer roll mechanism and synchro actuating mechanism. Connecting rod mechanism is firmly joined to tail wallboard. Servo-actuator through ball screw and connecting rod mechanism drive upper and lower guide needle bars, arranged in parallel, whose swing are equal and swing direction are inverse, move to and fro in horizontal direction respectively. Upper and lower 0 roll, set among left wallboard of machine head, middle wallboard, tail wallboard, is driven by electromotor run-in synchronism and upper and lower beam rotate synchronously by friction force of upper and lower roll. Because of uniform diameter and rotational speed of upper and lower roll, linear speed of upper and lower beam are stationary so as to ensure beaming of high efficiency and quality. The invention is characterized in simple structure, convenience adjusting, stationary performance and energy conservation.

Methods, servo systems, and data storage drives follow the lateral shift excursions of longitudinal tape, for example, from flangeless tape guides. A servo sensor is configured to sense lateral position of a tape head with respect to longitudinal servo tracks of the tape, a fine actuator is configured to translate the head laterally, and a coarse actuator is configured to translate the fine actuator laterally. Position error is determined between the head and a desired position related to the servo track, and the fine actuator operated to translate the head laterally to reduce the position error. In the embodiment, lateral shift excursion is sensed from the position error, and the coarse actuator is positioned substantially at a midpoint of the lateral shift excursion. Thus, the fine actuator follows the lateral shift excursions, while the coarse actuator remains at the midpoint.

A system and method for minimizing compensation rope sway by altering the natural frequency of compensation ropes using servo actuators. The rope sway may be minimized by moving the compensation sheave to adjust the tension of the compensation rope or adjusting the position of the termination of a compensation rope to account for changes in the position of a structure. Servo actuators may also be used to re-level the elevator car to account for rope stretch.

The invention discloses a three-dimensional model testing system of a deep mine construction engineering, which comprises a hydraulic loading system, a control system, a data monitoring system and a counterforce frame device, wherein the hydraulic loading system comprises a servo oil source group and a servo actuator group which are correspondingly communicated, and an actuator support frame usedfor supporting the servo actuator group; the counterforce frame device comprises a rectangular-ambulatory-plane main frame body, a gate type counterforce frame, a rear loading frame, a drive device and a wheel type bracket, a gate type counterforce frame shaft is connected to the side surface of the rectangular-ambulatory-plane main frame body, the rear loading frame corresponds to the gate type counterforce frame, and the servo actuator group is respectively fixed on the inner side end faces of the working ends of the rectangular-ambulatory-plane main frame body and the rear loading frame through the actuator support frame. The three-dimensional model testing system has the advantages of reasonable structure design, simple operation, convenience and flexibility in use, actual and reliable space simulation of a three-dimensional model, wide application range and strong adaptability.

A system and method for minimizing compensation rope sway by altering the natural frequency of compensation ropes using servo actuators. The rope sway may be minimized by moving the compensation sheave to adjust the tension of the compensation rope or adjusting the position of the termination of a compensation rope to account for changes in the position of a structure. Servo actuators may also be used to re-level the elevator car to account for rope stretch.

The invention discloses an electro-hydraulic servo actuator. The electro-hydraulic servo actuator comprises an oil tank (1), an electric motor (2), a hydraulic pump (3), two filters, an overflow valve (6), a servo valve (7), a hydraulic cylinder (12), a pressure relay (15), an energy accumulator (17), a pressure gage (24), two hydraulic locks, three one-way valves, three safety valves, a two-position three-way magnetic valve (11), a two-position four-way magnetic valve (19), a three-position four-way manual directional valve (23),a manual pump (21) and a manual stop valve (16). The electro-hydraulic servo actuator adopts modular design, and the hydraulic cylinder (12) and an actuator host can be installed in a separation mode. The actuator utilizes the servo valve (7) to regulate a controlled object, and the hydraulic pump (3) and the energy accumulator (17) provide pressure oil for the servo valve (7) together. The electro-hydraulic servo actuator has the advantages that energy is saved, efficiency is high, response speed is fast, and failure self-protection function is possessed.

The invention relates to the field of pile foundation project study, and aims at providing a one-dimensional horizontal circulation load loading device and an experiment method thereof. The one-dimensional horizontal circulation load loading device comprises a model groove, a loading system and a monitoring system. The interior of the model groove is used for being filled with filling soil and provided with a model pile. The loading system comprises a hydraulic servo actuator, a computer control system, a counter-force frame, a hydraulic jack, a positioning support and a positioning support guide rail. The monitoring system comprises a strain gage and a data collecting system. According to the circulation load loading experiment method, the horizontal circulation load is exerted on the model pile, real-time monitoring is carried out, and the working characteristic of the model pile under the action of the horizontal circulation load, the bearing force weakening situation and the influence range on the surrounding soil are studied. A series of one-dimensional horizontal circulation loads such as the wave load, the windstorm load and the earthquake load are simulated by changing the conditions such as the load amplitude, the load average value, the number of circulation times and the circulation frequency.

The invention relates to intelligent three dimensional microgravity air feet, which pertains to the microgravity simulation experiment device of spatial mechanism. Three air feet are arranged on the lower side of a supporting plate and a shell and three steering bars are arranged on the upper side of the supporting plate. The bottom part and the upper part of the shell are respectively provided with a servo-actuator and an antithrust bearing. A shaft joint and a speed reducer are arranged between the servo-actuator and the antithrust bearing. The lower end of a screw bolt inserted in the antithrust bearing bore is connected with the shaft joint. Transmission nuts matched with three sleeves are arranged on a connection board. A linear bearing is matched with and arranged on the lower end of the sleeve. Three flexible spring mechanisms are connected with a working plate on which a sensor and a joint for a test piece bracket are arranged. The intelligent air feet can effectively solve the technical problem of microgravity simulation during the complicated three dimensional movement of the spatial mechanism and is characterized by simple structure, high simulation precision, flexible test method, simple technique, small floor occupation and convenient debugging, thus being particularly applicable to the microgravity simulation test of complicated three-dimensional movement.

The invention discloses an electric servo cylinder earthquake simulation vibrating table in a small engineering structure, which comprises a vibrating table base, a servo motor, an electric servo actuator, a vibrating table top and a prestress gapless connection mechanism, wherein the vibrating table base is connected with the vibrating table top by a linear guide rail pair; a tested piece is placed on the vibrating table top; the servo motor is mounted below the vibrating table base; an output shaft of the servo motor is connected with an input shaft of the electric servo actuator used for converting rotation into linear motion; an output shaft of the electric servo actuator is connected with a piston rod; a motion direction of the piston rod is consistent with a motion direction of the linear guide rail pair; a table top driving connection seat and the prestress gapless connection mechanism are mounted at the front end of the piston rod; and the upper end of the table top driving connection seat is fixedly connected with the vibrating table top. The electric servo cylinder earthquake simulation vibrating table in the small engineering structure can simplify a structure, lower the cost, and shorten a production period and a single test period.

The present invention provides a high-effective ultrasonic processing equipment. Its structure is formed base, machine body, guideways, ultrasonic vibration working device, working table, main shaft feeding device, control device and ultrasonic generator. The machine body is placed on the base, said guide ways are parallelly placed on the machine body, the ultrasonic vibration working device is connected with guideways and can be up-down moved along the guideways by means of supporting plate of main shaft feeding device, the working table is placed on the base under the ultrasonic vibration working device, the control device is placed in the internal cavity of the base and is connected with main shaft feeding servo-actuator and sensor and energy converter of ultrasonic vibration working device by means of wires and can be formed into a closed-loop control circuit, and the ultrasonic generator is placed in the internal cavity of base and is connected with energy converter by means of wire.

This invention discloses a kind of numerical control device which consists of CPU module, switch module, power amplification module, and communication module. It could control Magnetic Suspended CMG servo system with high degree of accuracy. Data from the servo-actuator such as current, rotate speed and position signal was obtained by interface circuit and transported to CPU module; controlled quantity was created by operation to modulate the PWM; PWM with certain duty ratio was isolated and transported to the power amplification module to drive electric engine. Whole numeralization, integration, and high degree of accuracy control in CMG servosystem was realized in this invention.

The invention discloses a small liquid / solid rocket thrust vectoring nozzle servo control system. The system comprises a servo mechanism and a servo controller; the servo mechanism comprises two servo actuators, a cross-shaped omnidirectional mechanism, angle encoders and travel switches; the two servo actuators are respectively mounted on an X-axis surface and a Y-axis surface of a thrust vectoring nozzle; each travel switch is mounted in the middle of a push rod of the corresponding servo actuator; the angle encoders are mounted at shaft ends of two shafts, which are perpendicular to each other, of the cross-shaped omnidirectional mechanism; the servo controller comprises a core board and an interface extension board; and a CPU soft core is quickly established for the core board by an FPGA chip. By the control system and method, the size and the weight of the servo mechanism are greatly reduced because a mode of directly driving a lead screw by a motor is adopted, and reliability of the servo mechanism is improved; the FPGA-based core board and the peripheral interface extension board are adopted, instantaneity is good, computing efficiency is high, and extensibility is also high; and the servo mechanism and the servo controller are integrated, so that integration level is high, dynamic response is quick, and control precision is high.

Provided is a five-freedom-degree earthquake simulation vibrating table for on-bridge railway tracks. The end portion of each bridge body of a bridge is arranged on a side plate of a box type base, and the tracks are installed on the upper surface of the bridge bodies. a horizontal electro-hydraulic servo actuator, a left-side vertical electro-hydraulic servo actuator and a right-side vertical electro-hydraulic servo actuator are hinged to a base plate of the box type base. The actuating end of the horizontal electro-hydraulic servo actuator is sequentially hinged to the side faces of the bridge bodies of the bridge through a vertical connecting rod and a horizontal connecting rod, and the middle of the vertical connecting rod is further hinged to a support block of the box type base. The actuating ends of the left-side vertical electro-hydraulic servo actuator and the right-side vertical electro-hydraulic servo actuator are hinged to the bottoms of the bridge bodies. The five-freedom-degree earthquake simulation vibrating table can achieve five-freedom-degree movements including vertical translation, horizontal translation, rolling, nodding and shaking of the tracks, completely simulate seismic waves of the on-bridge railway tracks and large road distortion deformation caused by an earthquake and further obtain incentive data of the seismic waves, and provides an important test basis for railway train operation safe and structural earthquake-resistant design and safe operation management.

A tire uniformity testing machine includes an upper spindle including an upper rim portion, a lower spindle including a lower rim portion, and a spindle actuator such as a servo actuator adapted to vary a distance between the upper and lower spindles along a y axis. The tire testing machine also includes a conveyor adapted to move an associated tire to be tested along an x axis in a conveying direction. The conveyor is driven by a conveyor actuator said as a servo actuator. A motion controller is provided and receives x axis position feedback indicating a conveying distance moved by the conveyor along said x axis and that uses the x axis position feedback to control the spindle actuator to vary the distance between the upper and lower spindles along the y axis according to a function y=F(x) for coordinated synchronous variation of the distance between the upper and lower spindles along the y axis in response to movement of the conveyor along the x axis. The conveyor also moves vertically along the y axis and its position along with y axis can also be controlled by a servo actuator for coordinated vertical movement as a function of said x axis position feedback and / or as a function of y axis position feedback provided by said spindle actuator indicating a distance between said lower and upper spindles.

The invention provides a servo controller comprising a servo actuator driving module, a D / A (Digital-to-Analog) conversion module, a real-time control module DSP (Digital Signal Processor), an A / D (Analog-to-Digital) converting module, a signal acquiring and conditioning amplifying circuit module for acquiring signals of a displacement sensor, a force sensor, a speed sensor and a limit switch, a two-port RAM (Random Access Memory) module, a PC(Personal Computer) / 104 interference module, a level translator driving circuit module, a voltage-stabilizing source circuit module and a logic circuit module. The servo controller solves the problems of large size, complexity, inconvenience in operation and single function of the traditional hydraulic servo control system. The electric-hydraulic servo controller integrates data acquiring, processing and amplifying, meanwhile, a pulse excitation source link is additionally provided, and an electric-hydraulic servo actuating system can be directly controlled without addition of external equipment, so that the hydraulic servo control system has the advantages of small size, simplicity in operation and capability of realizing multichannel and multi-parameter simultaneous control.