73results about How to "Realize full closed-loop control" patented technology

The invention relates to a 3D (three-dimensional) printing system structure. The 3D (three-dimensional) printing system structure comprises a lifting printing platform, a dual-screw dual-optical-axis Z-shaft driving mechanism, an X-shaft drive mechanism, a Y-shaft drive mechanism as well as a stationary object carrying platform, wherein the printing platform is provided with an X-shaft drive motor and a Y-shaft drive motor; the two motors are respectively connected to a pair of driven bearings by synchronous belts at two ends of the driving shaft; double slide shafts in the X direction and the Y direction are both provided with slide seats; two pairs of slide seats are respectively connected by an X cross beam and a Y cross beam, and the two cross beams respectively penetrate through a 3D printer head; a driving motor of the dual-screw dual-optical-axis driving mechanism and the driving shaft are connected by the synchronous belt; the position of the driving motor can be adjusted randomly. The X-shaft drive mechanism, the Y-shaft drive mechanism and the driving shaft operate individually, so that the motion modulation is reduced; the dual-screw dual-optical-axis driving mechanism has favorable stability, so that the printing platform is stressed in a balance manner; the driving in each direction is stable; the 3D printing precision is improved.

The invention discloses a movable drilling and milling robot system achieving automatic addressing. The movable drilling and milling robot system comprises a movable drilling and milling robot body subsystem, an integrated control subsystem and a navigating and positioning subsystem; the movable drilling and milling robot body subsystem comprises an omni-directional intelligent moving platform module, a manipulator module and a drilling and milling end executer module; the navigating and positioning subsystem comprises an omni-directional intelligent moving platform navigating and positioning module, a manipulator positioning precision improving module and a high-precision end executer positioning module; the integrated control subsystem comprises a central control module, an omni-directional intelligent moving platform control module, a manipulator control module, an end executer control module and an energy management control module. The system can rapidly adjust the layout according to changes of manufacturing tasks or production environments, is suitable for multi-variety and middle-small-batch production and overcomes the processing technological difficulties of an overlarge structure.

This invention relates to a device and method of detecting the angle of communication antenna downdiping, which comprises the following parts: motor driver (1), phase shifter (2), potentiometer (3). The moving end of potentiometer (3) connects the mobile portion of phase shifter (2) mechanically. The motor driver (1) synchronizes the motion of the phase shifter (2) and potentiometer (3).

The six-freedom micro operation robot with complete position a posture feedback features that the bench and the pedestal are connected through 12 kinematic link branches, including 6 feedback branches comprising a feedback branch pillar with flexible hinges on two ends and a strain gauge each, and 6 driving branches comprising a driving branch pillar with flexible hinges on two ends, parallel plate elastic shift pair and piezoelectric ceramic displacement unit each. The 12 kinematic link branches are separated into 3 groups including 2 feedback branches and 2 driving branches each. The main body of the six-freedom micro operation robot is one integral part machined through once machining. The present invention has simple structure, small size, low manufacture cost and other advantages, can realize micro complete closed-loop control with no friction, no interval and high resolution, and may be used widely.

The invention relates provides a linear rotary servo motor with two degrees of freedom, and relates to the field of servo motors, wherein the linear rotary servo motor with two degrees of freedom can achieve two degrees of freedom of linear motion and rotary motion on one output shaft simultaneously, be used for mechanical equipment, simplify complexity of the equipment, and reduce production and maintenance cost. The linear motion is produced by Ampere force borne by a coil on a primary rotor in a magnetic field, and position feedback is conducted by using a grating ruler. The rotary motion is produced by a hollow cup coil, and position feedback is conducted by using a rotary encoder. Both a primary coil and a secondary coil are of a non-iron-core structure so that rotor mass and rotary inertia can be reduced greatly. The linear rotary servo motor with two degrees of freedom has high response speed. As a position feedback device is directly installed on the rotor, zero transmission and full-closed loop control are achieved, and motion accuracy is improved greatly. The linear rotary servo motor with two degrees of freedom is applicable to short-route, light-load, precision and high-speed movement occasions.

The invention discloses a three-axis antenna test turntable system with a low reflection characteristic, which is composed of three parts of a rolling shaft system assembly, a pitching shaft system assembly and an azimuth shaft system assembly, wherein the azimuth shaft system assembly is arranged on a microwave anechoic chamber ground through an azimuth base; the pitching shaft system assembly is fixedly connected with the outer ring of an azimuth four-point contact ball turntable bearing through a pitching frame lower flange face by using a screw; the rolling shaft system assembly is fixedly connected with the upper end face of a pitching upper support through a rolling frame lower flange face by using a screw; and a load is arranged on a rolling load mounting plate. Movement of three degrees of freedom rotation of rolling, pitching and azimuth can be realized, accurate positioning at a specified angle position can be realized, and the system of the invention has the advantages of practicality, stability and reliability.

The invention discloses a force feedback main manipulator for minimally invasive surgery. The force feedback main manipulator comprises a first parallelogram structure, a second parallelogram structure, an attitude adjusting mechanism and a clamping mechanism; the first parallelogram structure and the second parallelogram structure are both formed by a plurality of rod pieces which are sequentially hinged end to end; a first hinging point of the first parallelogram structure is coaxial with a first hinging point of the second parallelogram structure; a second hinging point of the first parallelogram structure is connected with a second hinging point of the second parallelogram structure through a connecting rod; the tail end of the second parallelogram structure is a wrist part, wherein the wrist part can be keep horizontal under connection of the first parallelogram structure and the second parallelogram structure; the wrist part is hinged with the attitude adjusting mechanism; and the attitude adjusting mechanism is hinged with the clamping mechanism. The force feedback main manipulator provided by the invention can meet the requirements of minimally invasive surgery, conforms toergonomics, has a force feedback function and is low in cost.

The method comprises: using a bar stock saw automatically-adaptive lay- off system. The method comprises: a horizontal AC servo drive system is used for realizing the rod feed; a highly-accurate photoelectric encoder is used to detect the amount of fed rod; a grating shifting sensor is used to detect the height value of front end of the rod; a vertical AC servo drive system is used to adjust the height of the rear end of the rod to keep the consistency between the front end and the rear end of the rod; a highly-accurate weight sensor is used to weigh the actual weight G of the rod and to compare the actual weight of rod with the reset value, and according to the difference Delta G to adjust the cutting length.

The invention provides a planar parallel mechanism end tracking control system based on a two-dimensional encoder and a planar parallel mechanism end tracking control method thereof. The system comprises a planar parallel mechanism, a two-dimensional encoder measurement device, a mechanism clearing device and a control device which are installed on a static platform. The control device is composed of a servo motor control module, a trigger photoelectric switch module, a parallel mechanism positioning control module and a parallel mechanism trace tracking control module. According to the whole system, firstly the end of the planar parallel mechanism is enabled to be located in the zero point through the mechanism clearing device, then the real-time position of the end of the planar parallel mechanism is measured through the two-dimensional encoder and then inputted to the control device, and the planar parallel mechanism is driven by the control device so that the end is enabled to be accurately positioned according to the preset traces. According to the control system and method, a data processing module involved can obtain the position of the end of the platform through simple resolving so that the real-time performance is great. Meanwhile, the end trace tracking precision of the planar parallel mechanism can also be enhanced so that the condition for realizing submicron level positioning precision is provided for the planar parallel mechanism.

The invention discloses a Stewart platform attitude measurement device. Axial directions of three coordinate axes of a movable platform coordinate system are respectively X, Y and Z, four tri-axial acceleration sensors are installed on the movable platform of the Stewart platform through four cushion blocks, two tri-axial acceleration sensors are symmetric to each other by using a coordinate origin Ob of the movable platform coordinate system and respectively arranged at two sides of the X axis, another two tri-axial acceleration sensors are symmetrically installed by using the X axis as the symmetric axis. The invention further discloses a measurement method adopted by the Stewart platform attitude measurement device, the acceleration component of the coordinate origin Ob of the movable platform with respect to the coordinate origin OI of a fixed platform and a movable platform rotation angle speed are obtained through a formula, so that the position and attitude parameters of the movable platform coordinate system with respect to the fixed platform coordinate system can be obtained. Through the adoption of the measurement device and measurement method disclosed by the invention, the centroid coordinate, the rotation angle and the rotation direction parameter of the Stewart platform can be directly obtained without complex computation.

The invention relates to a parallel orientating system with two free degree, high acceleration, high precision and macro/micro dual driven. The mutually perpendicular X-shaft liner driven apparatus 2 and Y-shaft liner driven apparatus are fixed on the base 1; the X-shaft liner driven apparatus 2 is fastened with X-shaft moving platform assembly 8; the Y-shaft liner driven apparatus 3 is fastened with Y-shaft moving platform assembly 9; the X-shaft parallel linkage 12 is hinged between X-shaft moving platform assembly 8 and X-shaft end platform 10; the Y-shaft parallel linkage 13 is hinged between Y-shaft moving platform assembly 9 and Y-shaft end platform 11; the X-shaft end platform 10 and the Y-shaft end platform 11 are fastened with the end output platform 15.

The invention discloses a controller for a bus-type fully electric injection molding machine. The controller comprises a human-machine interaction unit and a main control unit; a field bus master station functional module reads instruction data written by an embedded microprocessor from a double-port data memory, packs the instruction data according to the format of a field bus protocol and then outputs the packed instruction data, and the packed instruction data pass through a first network chip and a first network interface and then are transmitted to a slave station; after the slave station processes the instruction data, feedback data are uploaded to the field bus master station functional module from a second network interface and a second network chip; the field bus master station functional module unpacks the uploaded feedback data, and writes the unpacked feedback data into the double-port data memory; and the embedded microprocessor reads the uploaded feedback data from the double-port data memory, submits the feedback data to the human-machine interaction unit for displaying, meanwhile, carries out various control calculations, and writes the calculated control instruction data into the double-port data memory.

The invention relates to the field of centrifugal experiments. The invention particularly discloses a test piece rotation driving device for a centrifugal overload test of a solid rocket engine. The device comprises a mounting bottom plate and a driving motor, the output end of the driving motor is connected with a ball screw nut pair, a first guide rail is arranged on the mounting bottom plate along the ball screw nut pair, a first sliding block is arranged on the first guide rail, a screw nut of the ball screw nut pair is connected with the first sliding block, and a moving seat is arrangedon the first sliding block. The device further comprises a rocker arm, a second guide rail is arranged on the rocker arm along the rocker arm, a rotating seat is slidably arranged on the second guiderail, and a rotating shaft is arranged on the rotating seat and rotationally connected with the moving seat. The driving device has the advantages that a speed reducer, the screw nut pair, the rockerarm and the like in the driving device are of labor-saving structures, and large torque can be provided; the driving device is controlled by a servo motor, driven by the ball screw nut pair and guidedby a guide rail sliding block pair, and full-closed-loop control is realized by an encoder, so that the whole system has very high control precision.

The invention relates to a magnetic material temperature feature testing method, which belongs to the technical field of material testing. The method comprises the following steps: 1, a special testing device is built; 2, n temperature sampling points are selected, wherein n is a natural number no smaller than 2; 3, the special testing device with tested magnetic material is fixed on a rotating table, the temperature environment is the ith temperature sampling point Ti, the rotating table is rotated, a weight m fixed at the input end of a compensation wheel enables the compensation wheel to deflect under the effect of a gravitational acceleration g, current Ii is then generated in a current coil, and the value of the current Ii is measured, wherein i=1, 2, to n; and 4, at different temperature sampling points, the tested magnetic material has different magnetic induction intensities B, I passing through a torque coil is different, and thus temperature features of the tested magnetic material can be obtained. The method of the invention is high in testing precision and wide in application range.

The invention provides a precision robot. The robot comprises a base assembly, a big arm assembly, a forearm assembly and a control system; one end of the big arm assembly is rotationally arranged on the base assembly; a first angle encoder coaxially rotating with the big arm assembly is arranged on the base assembly; one end of the forearm assembly is rotationally arranged at the other end of the big arm assembly; a second angle encoder coaxially rotating with the forearm assembly is arranged at the other end of the big arm assembly; the other end of the forearm assembly is connected with a load; the first angle encoder and the second angle encoder are in signal connection with an input end of the control system; and the base assembly and the big arm assembly are in signal connection with an output end of the control system. With the precision robot, the position and the motion track of a mechanical arm can be detected by the control system online in real time, so that full-closed loop control on input and output is realized, and the motion speed and precision of the robot are greatly increased.

The invention discloses a high-speed board thickness measuring and retaining device. The device comprises a guide mechanism and thickness measuring mechanisms; the guide mechanism is inserted on a sliding block with a reset spring in a sleeving manner, and can vertically move on a guide rail; the three thickness measuring mechanisms are arranged at the middle position and the two symmetric side positions of the place where a board passes through; a suspension mechanism is formed by the whole guide mechanism and the thickness measuring mechanisms, and the board to be measured is in the natural stretching state, the problems of measuring abrasion of a traditional displacement sensor and the damage to the board are solved, and the measuring precision is improved.

The invention relates to a combined production process, in particular to a modular combined production process for automatic ball cage manufacturing. The method comprises the following steps of feeding machine operation, positive and negative recognition system operation, elevator operation, numerical control window grinding machine operation, numerical control cylindrical grinding machine operation, numerical control internal grinding machine operation and automatic online detection operation. The functions of automatic feeding, recognition, clamping, machining, automatic detection, sorting,diagnosis, alarming, protection, communication, calling and the like are configured, and full-closed-loop control over high-precision ball cage grinding automation and real-time efficient online detection is truly achieved.

The invention relates to a vertical high-speed high-accuracy direct-driving mechanism. The mechanism comprises a vertically-placed base, vertically-placed sliding rails on the base, a primary linear motor and a secondary linear motor. The primary linear motor is installed on the base. The secondary linear motor is connected to a movable carrying plate, on which a sliding block is arranged. The sliding block is clamped on the sliding rails and move along the sliding rails. The primary linear motor and the secondary linear motor are arranged oppositely. The movable carrying plate is provided with a reading head. The base is further provided with a grating ruler used for sensing changes of the position of the reading head. The vertical high-speed high-accuracy direct-driving mechanism has following beneficial effects: by adoption of direct-driving technology of linear motors, extremely high acceleration and deceleration speed and motion speed are achieved; mechanical abrasion and opposite clearance are avoided; non-contact driving technology is utilized so that long service lifetime is realized; the base is made by large damping material so that value of amplitude for harmonic response of a lower-order mode is inhibited and vibration of the high-order mode is overcome; good dynamic response attribute is obtained; and by adoption of high-resolution position feedback device, full closed-loop control is achieved and the repeated accuracy is higher.

The invention relates to the field of semiconductor equipment, in particular to a crucible lifting and rotating mechanism special for a silicon carbide furnace. The mechanism comprises a lifting mechanism, a rotating mechanism is installed on a lifting sliding table of the lifting mechanism, the rotating mechanism comprises a rotating shaft, and the rotating shaft is rotationally connected with the lifting sliding table through a magnetofluid rotary sealing piece; the periphery of the magnetofluid rotary sealing piece is connected with the lower end of a corrugated pipe device; the upper end of the corrugated pipe device is a corrugated pipe upper flange for connecting a silicon carbide furnace bottom cavity; the lower end of the rotating shaft is rotationally connected with a rotating joint which is provided with a water inlet and a water outlet; and a cooling loop is arranged in the rotating shaft, one end of the cooling loop is communicated with the water inlet, and the other end of the cooling loop is communicated with the water outlet. The magnetofluid rotary sealing piece is additionally arranged, so that the rotating effect and the high-vacuum sealing effect are achieved. High sealing performance between the rotating position and a silicon carbide furnace inner cavity is conveniently achieved, then the high vacuum degree of the silicon carbide furnace inner cavity can be guaranteed, and the mechanism is suitable for processing and production of third-generation semiconductor materials.

The invention discloses a smelting control method of a metal electroslag remelting furnace. The method is characterized by comprising the following steps: before smelting, firstly installing three position sensors used for detecting the position of an electrode in the metal electroslag remelting furnace; secondly before smelting and during smelting, detecting the position of the electrode by the position sensors, feeding the position of the electrode, detected by the position sensors, back to a data control processing system and then controlling executive devices to move a crystallizer to achieve automatic centering of the electrode under closed-loop control, wherein the three position sensors are arranged in a concentric circle along the axial lead of the crystallizer and are uniformly distributed and fixed on the upper surface of the crystallizer in a ring shape. The method has the advantages that the method can conduce to facilitating centering, reducing the phenomenon of failure of the crystallizer and prolonging the service life of the crystallizer.

The invention provides a precise linear shaft for a cutter grinder and relates to the field of precise cutter machining equipment. The precise liner shaft comprises a base, a water retaining plate, an end plate, a protecting plate, a left dust cover, a right dust cover, a movable plate, a dust cover connecting plate, drainage grooves, an external-interface connecting plate, an electrical interface, an air pipe connector, a linear motor rotor, a linear motor stator, limiting blocks, a reading ruler, a grating ruler, hard limit, a slider, a guide rail and an inner water retaining plate. The technical problems existing in transmission cutter machining and the cutter grinder for grinding of old cutters can be solved; the cutter grinder set up by modularized design for the precise linear shaft can improve machining speed, the performance of a complete machine is improved to a certain degree, and an integrated optimization solution is provided for precise cutter maching.

The invention discloses a double-code-disc motor control system which comprises a first code disc which is arranged on the motor and is used for calculating speed feedback of a speed ring, a second code disc which is arranged on an external execution mechanism and is used as position feedback of a motor control position ring. Three-ring control is used by the motor control system, and the positionring, the speed ring and a current ring are arranged from the outside to the inside. According to the double-code-disc motor control system provided by the invention, the double code discs are used to achieve the full-closed-loop control of a motor, when the execution mechanism has a problem of a transmission gap, elastic deformation or the like, a short-time 'galloping' phenomenon of the motor can be eliminated, and a vibration phenomenon of the motor in passing the transmission gap is greatly improved.