40results about How to "Improve displacement control accuracy" patented technology

The invention relates to a dynamic gas elastic foil bearing with stability and adaptive control functions, comprising a bearing casing, a plurality of bearing pads, an elastic foil, and a piezoelectric ceramics micro displacement actuator. The dynamic gas elastic foil bearing is characterized in that the bearing pads are uniformly distributed along the inner wall of the bearing casing; the bearing pads are welded with a bottom bump foil and one end of a top foil; the other end of the top foil is lapped over an adjacent top foil, wherein the piezoelectric ceramics micro displacement actuator with one end fixed on a set screw and the other end arranged on a jig is connected with two bearing pads; the piezoelectric ceramics micro displacement actuator is connected with a feedback controller PID; an input of the feedback controller PID is connected with an eddy current displacement sensor. The dynamic gas elastic foil bearing with stability and adaptive control functions has the advantages of strengthened equivalent rigidity and equivalent damping of the elastic foil, restrained vibration of rotor system, improved bearing capacity and stability of the bearing, reduced size and structure, increased control precision of displacement, and quickened response speed.

The invention provides a roller-lifting proportional and synchronous hydraulic control system, relating to a perforating machine. The invention solves the problem that the traditional hydraulic control system can not control the displacement conveniently. The roller-lifting proportional and synchronous hydraulic control system comprises a proportional valve, hydraulic control one-way valves, a change valve, a pressure relay, a synchronous motor and two roller-lifting hydraulic cylinders, wherein the three hydraulic control one-way valves are respectively connected with a port p, a port a and a port b of the proportional valve, and the port a of the proportional valve is connected with the pressure relay and an oil inlet of the synchronous motor through the hydraulic control one-way valves; two oil outlets of the synchronous motor are respectively connected with piston cavities of the two roller-lifting hydraulic cylinders, and piston rod cavities of the roller-lifting hydraulic cylinders are connected in parallel and then connected with the port b of the proportional valve through the hydraulic control one-way valves; and a port b of the change valve is connected with oil control ports of the hydraulic control one-way valves, an oil return port of the change valve is connected with return oil of the system, and oil drain ports of the hydraulic control one-way valves are connected with oil return pipes of the system. The roller-lifting proportional and synchronous hydraulic control system can be used for controlling the synchronous movement of a plurality of hydraulic cylinders by using one proportional valve.

The invention provides a mechanical shafting rotary error active compensation device based on a piezoelectric actuator, and relates to the field of mechanical shafting rotary error active compensation. The device aims at solving the problems that the rotary precision of a traditional rolling bearing supporting shafting can hardly be improved in a breakthrough manner through machining and assembling links. The device comprises a metal end cap, two metal gaskets, the piezoelectric actuator and a base support. The piezoelectric actuator is formed by stacking multiple layers of piezoelectric ceramic pieces and metal electrode pieces, wherein the piezoelectric ceramic pieces and the metal electrode pieces are alternately arranged. Each layer of piezoelectric ceramic piece is composed of four sector rings defining a ring, and a certain gap is reserved between every two adjacent sector rings. In each layer of piezoelectric ceramic piece, the polarization directions of a pair of opposite sector rings are opposite, and the polarization directions of the sector rings corresponding to the adjacent piezoelectric ceramic pieces in the axial direction are opposite, in other words, the polarization directions in the axial direction are alternately distributed. The piezoelectric actuator is used as an actuator of the compensation device, and the beneficial effects of being high in displacementcontrol precision and high in response speed are achieved.

The invention discloses a linear motor physical precision compensation control system. The linear motor physical precision compensation control system comprises a linear motor, a linear grating ruler,and a main control unit, wherein the linear motor and the linear grating ruler are electrically connected to the main control unit separately; a compensation data table is pre-arranged in the main control unit, and a plurality of collection points are pre-arranged on the moving track of the linear motor; the main control unit is used for executing a calibration and learning process, wherein whenthe linear motor moves to each collection point, the position data acquired by the linear grating ruler is fed back to the main control unit and is stored in the compensation data table; and meanwhile, the main control unit is used for executing an operation control process, wherein the main control unit determines a collection point according to the target position sent by an upper controller, inquires the position data of the linear grating ruler corresponding to the collection point in the compensation data table, and then controls the linear motor to run to the collection point according to the position data of the linear grating ruler so as to further arrive at the target position. According to the control system, the feedback data of the linear grating ruler can be compensated, so that the displacement control precision of the linear motor is further improved.

The invention provides an intelligent temperature measuring device for high voltage switchgear integration, which comprises a switchgear body, a temperature measurement executing mechanism, a temperature measuring control module and a human-machine aligning module. The temperature measurement executing mechanism is arranged in the breaker chamber inside the switchgear body. The temperature measurement executing mechanism comprises a lateral shifting mechanism, a rotation mechanism, a second regulation mechanism, a third regulation mechanism and a temperature measuring probe. All are mutually connected successively from the top to the bottom. The temperature measuring control module corresponds to and is connected to the temperature measurement executing mechanism and the human-machine aligning module. With the human-machine aligning module provided by the invention, it is possible to perform tests on the temperature through a temperature measurement executing mechanism to the upper and lower three-phase static contacts of a breaker with the further realization of automatic tests on the temperature of a breaker contact. This not only reduces the work intensity of workmen but also raises the work efficiency of temperature measuring.

The invention relates to a laser displacement transducer mounting support provided with an adjusting and self-calibrating structure. The laser displacement transducer mounting support comprises an upper adjusting frame, a pre-tightening spring, a lower adjusting frame, an adjusting bolt and a transducer base frame provided with a transducer. The transducer base frame is fixed on the upper adjusting frame. The lower end face of the upper adjusting frame and the upper end face of the lower adjusting frame are connected by virtue of a dovetail groove structure with inclination, the right end face of the upper adjusting frame is provided with an adjusting screwed hole, a right boss of the lower adjusting frame is internally connected with the adjusting bolt, the upper adjusting frame and the lower adjusting frame are connected in an adjustable way by virtue of the adjusting bolt and the screwed hole, the pre-tightening spring is sheathed outside the adjusting bolt, and the two ends of the pre-tightening spring are respectively connected with the right end face of the upper adjusting frame and the inner end face of the right boss of the lower adjusting frame in a compressed manner. When the laser displacement transducer mounting support provided by the invention is used for carrying out adjustment and preliminary calibration in a laser displacement transducer application field, auxiliary materials, devices or tools are not required to complete the adjustment and preliminary calibration, the laser displacement transducer mounting support provided by the invention is convenient to use and is provided with a corresponding standard, and displacement control accuracy is high.

The invention discloses a method for in-situ dynamic three-dimensional reconstruction of a sample by using a multi-degree-of-freedom sample rod. The method comprises steps of manufacturing the samplerod, and loading a sample into a head end of the sample rod; inserting the sample rod into a transmission electron microscope to adjust a feature point on a to-be-observed area of the sample to be aligned with the axis of the sample rod; enabling the rotating shaft to accumulatively rotate by 180 degrees, and taking a picture every other 1 degree; and S3, importing the pictures obtained in the step S3 into a computer, and carrying out three-dimensional reconstruction.

The invention discloses a multi-degree-of-freedom sample rod. The sample rod comprises a framework and a rotating shaft, wherein a magnet is arranged at a tail end of the rotating shaft, the frameworkis provided with a leading-out circuit board, the framework is provided with a notch, the leading-out circuit board comprises a bent part, the bent part is located in the notch, and a magnetic fieldsensor is fixed to the bent part. The sample rod is advantaged in that the position information of the rotating shaft can be detected, when the rotating shaft rotates and moves back and forth, the magnetic field changes accordingly, the magnetic field sensor measures the magnetic field, the position information of the rotating shaft can be obtained through solving, the magnetic field sensor can befixed through soldering tin connection between the magnetic field sensor and the leading-out circuit board, short circuit of one pair of pins on the leading-out circuit board can be conducted, and the number of wires needing to be connected is reduced; the leading-out circuit board comprises a plane part and a bending part, the plane part and the bending part are vertically laid on a surface of the framework, the magnetic field sensor is fixed to the bending part, and the bending circuit board is small in occupied area and easy to disassemble.

The invention discloses a multi-degree-of-freedom sample rod with a sample clamping nozzle, and the rod comprises a sleeve, a pre-tightening screw and a detachable sample clamping nozzle; the sample clamping nozzle comprises a clamping part for loading a sample and a connecting part. Samples of various sizes can be observed, the sample clamping nozzle is arranged to be used for installing the samples, the samples and the sample clamping nozzle can serve as sample assemblies to be installed at the front end of the sample rod, thereby facilitating installation and disassembly.

The invention discloses a conical cylinder vibration high-speed queuing seed discharging device and method. The conical cylinder vibration high-speed queuing seed discharging device comprises a conical cylinder, a seed discharging head, a vibration motor set, a vibration isolation component and an arch forming detection system, wherein the vibration motor set is installed on the conical cylinder, the vibration isolation component is fixed at the upper end of the conical cylinder through a clamping nut, the seed discharging head is mounted at the lower end of the conical cylinder, and the arch forming detection system is mounted below the seed discharging head. The method specifically comprises the following steps of calibrating parameters, and specifically, calibrating related parameters according to the size and fluidity of seeds; performing queuing and seed discharging, and specifically, controlling the conical cylinder to vibrate according to determined control parameters to realize high-speed queuing and seed discharging; and performing vibration arch breaking, wherein the arch forming condition is detected, and when arch forming is detected, arch breaking vibration related control parameters are started for arch breaking. According to the device and the method, arch forming during seed discharging can be avoided, seeds can be discharged in a high-speed queuing mode, the characteristics of being high in discharge capacity control precision, simple in structure, good in seed discharging uniformity, low in seed damage rate and the like are achieved, high-speed queuing seed discharging can be achieved, and real-time and efficient operation is guaranteed.

The invention discloses an arm type suspension based on a fuzzy PID (proportion integrals differential) controller and an active displacement control method thereof. The arm type suspension based on the fuzzy PID controller comprises an arm type suspension, a frame, a driving circuit, two displacement sensors and the fuzzy PID controller, wherein the arm type suspension is arranged on the frame; the fuzzy PID controller is connected to a motor through the driving circuit; a pulse encoder is arranged on the motor; the arm type suspension comprises the motor, two longitudinal arms, two cantilever transmission regulating mechanisms and two electromagnetic clutches; the two cantilever transmission regulating mechanisms are distributed at the two sides of the motor; two output ends of the motorare connected to one ends of the two cantilever transmission regulating mechanisms through the electromagnetic clutches; the other ends of the two cantilever transmission regulating mechanisms are connected to the two longitudinal arms; the two displacement sensors are respectively arranged on the two longitudinal arms; and the displacement sensors and the pulse encoder are connected to the fuzzyPID controller. The effect of active displacement control of the arm type suspension can be improved; and the arm type suspension based on the fuzzy PID controller improves the driving smoothness ofvehicles, and ensures smooth and steady control, high displacement control accuracy, and no external interference.

The invention discloses a mechanical shaft system revolving error active compensation device based on piezoelectric actuators, relates to the technical field of rotor vibration active inhibition, andsolves such actual problems as difficult prominent improvement of the revolving precision of a traditional rolling bearing support shaft system through machining and assembly links and influence on the machining precision of a machine tool by revolving errors. Multiple piezoelectric actuation assemblies are arranged in symmetric positions of the outer side surfaces of a rolling bearing base, and are mounted on the outer side surfaces of the rolling bearing base through insulation cushions; pretightening force is applied in mounting of the piezoelectric actuators; actuator supports sleeve the rolling bearing base; the multiple piezoelectric actuation assemblies are positioned between the rolling bearing base and the actuator supports; a sensor is used for measuring radial information of a selected measuring point of a rotating main shaft; an active compensation control algorithm is operated in a control circuit; information to be compensated is calculated on the bearing base according to position signals measured by the sensor to generate control signals for driving the piezoelectric actuators; and a driving circuit magnifies the control signals generated by a controller to load onthe piezoelectric actuators.

The invention discloses a spot welding system. The spot welding system comprises a man-machine interaction module, a control module, a welding head control module and a machine table motion module. The man-machine interaction module is used for acquiring motion parameters and sending the motion parameters to the control module; the control module is used for controlling the machine table motion module to move to a corresponding spot welding position according to the motion parameters and sending feedback information to the control module; the control module is also used for sending execution information to the welding head control module according to the feedback information; and the welding head control module is used for controlling a welding head to conduct spot welding according to theexecution information, motion parameters are set in the man-computer interaction module, the control module controls the machine table motion module to move at the position of a welding point, and then the welding head control module controls the welding head to conduct welding. The machine table motion module is adopted to transport batteries and nickel sheets which need to be welded to the position where the welding head control module can conduct welding, manual operation is reduced, the safety of workers is improved, and the welding efficiency is greatly improved.

The invention discloses a multi-degree-of-freedom sample rod with an optical fiber, which comprises a skeleton with an optical fiber groove. On the side of the skeleton, there is a fiber groove for the passage of optical fibers, which can not only avoid the wear and entanglement of the optical fiber, but also make the wiring beautiful; moreover, the fiber groove is connected with the front-end circuit board, and the front-end circuit board has the function of guiding the optical fiber, and the fiber head passes through the front-end circuit board, the optical fiber head has a small bending range, and the light wave will not be attenuated.

The invention discloses a multi-degree-of-freedom sample rod with an optical fiber, which comprises a framework. An optical fiber groove is formed in the framework. The side surface of the framework is provided with the optical fiber groove for the optical fiber to pass through, thereby avoiding abrasion and winding of the optical fiber and being beautiful in wiring; moreover, the optical fiber groove is connected with a front-end circuit board, the front-end circuit board has the function of guiding the optical fiber, the head of the optical fiber passes through the front-end circuit board, the head of the optical fiber has small bending amplitude, and light waves cannot be attenuated.

The invention discloses an arm type suspension based on a fuzzy PID (proportion integrals differential) controller and an active displacement control method thereof. The arm type suspension based on the fuzzy PID controller comprises an arm type suspension, a frame, a driving circuit, two displacement sensors and the fuzzy PID controller, wherein the arm type suspension is arranged on the frame; the fuzzy PID controller is connected to a motor through the driving circuit; a pulse encoder is arranged on the motor; the arm type suspension comprises the motor, two longitudinal arms, two cantilever transmission regulating mechanisms and two electromagnetic clutches; the two cantilever transmission regulating mechanisms are distributed at the two sides of the motor; two output ends of the motorare connected to one ends of the two cantilever transmission regulating mechanisms through the electromagnetic clutches; the other ends of the two cantilever transmission regulating mechanisms are connected to the two longitudinal arms; the two displacement sensors are respectively arranged on the two longitudinal arms; and the displacement sensors and the pulse encoder are connected to the fuzzyPID controller. The effect of active displacement control of the arm type suspension can be improved; and the arm type suspension based on the fuzzy PID controller improves the driving smoothness ofvehicles, and ensures smooth and steady control, high displacement control accuracy, and no external interference.

The invention discloses a multi-degree-of-freedom sample rod with a rotating shaft driving assembly. The sample rod comprises a shell and a rotating shaft, wherein at least one group of rotating shaftdriving assembly is arranged between the shell and the rotating shaft, each group of rotating shaft driving assembly comprises two driving units which are symmetrically arranged, and each driving unit comprises a substrate, an electrode and a piezoelectric ceramic piece. The sample rod is advantaged in that by arranging a plurality of groups of rotating shaft driving assemblies, the rotating shaft can rotate and axially move, and multi-degree-of-freedom driving of the sample rod is realized.

The invention discloses an adjusting method for aligning a sample to the axis of a rotating shaft. The adjusting method comprises steps of manufacturing a sample clamping nozzle, inserting a sample rod with the sample into a transmission electron microscope and the like. When the rotating shaft rotates, a to-be-observed area of the sample is always in the observation visual field of the transmission electron microscope by adjusting the sample to align with the axis of the rotating shaft.

The invention provides a roller-lifting proportional and synchronous hydraulic control system, relating to a perforating machine. The invention solves the problem that the traditional hydraulic control system can not control the displacement conveniently. The roller-lifting proportional and synchronous hydraulic control system comprises a proportional valve, hydraulic control one-way valves, a change valve, a pressure relay, a synchronous motor and two roller-lifting hydraulic cylinders, wherein the three hydraulic control one-way valves are respectively connected with a port p, a port a and a port b of the proportional valve, and the port a of the proportional valve is connected with the pressure relay and an oil inlet of the synchronous motor through the hydraulic control one-way valves; two oil outlets of the synchronous motor are respectively connected with piston cavities of the two roller-lifting hydraulic cylinders, and piston rod cavities of the roller-lifting hydraulic cylinders are connected in parallel and then connected with the port b of the proportional valve through the hydraulic control one-way valves; and a port b of the change valve is connected with oil control ports of the hydraulic control one-way valves, an oil return port of the change valve is connected with return oil of the system, and oil drain ports of the hydraulic control one-way valves are connected with oil return pipes of the system. The roller-lifting proportional and synchronous hydraulic control system can be used for controlling the synchronous movement of a plurality of hydraulic cylinders by using one proportional valve.

The invention discloses a multi-degree-of-freedom sample rod, and the sample rod comprises a shell and a rotating shaft; a skeleton is arranged between the shell and the rotating shaft, and the skeleton is coaxial with the shell and the rotating shaft. During assembly, the rotating shaft and the skeleton are coaxial, then the rotating shaft-skeleton is installed in the shell, and the rotating shaft, the skeleton and the shell are coaxial, so the installation precision is improved; in addition, the skeleton further provides an installation position for the rotating shaft driving assembly, and the skeleton further plays a role in separating the rotating shaft from the wire and preventing the wire from interfering with rotating shaft movement.

The invention discloses a multi-degree-of-freedom sample rod with a self-positioning function. The sample rod comprises a shell and a rotating shaft, wherein the shell is coaxial with the rotating shaft, the shell is provided with an inner cavity, the rotating shaft is positioned in the inner cavity of the shell, and a self-positioning mechanism is arranged in the inner cavity. The sample rod is advantaged in that no matter how the rotating shaft rotates, a central shaft of the rotating shaft can always automatically reset to the original position due to the action of the self-positioning mechanism so that a to-be-observed area of the sample is prevented from being separated from the observation visual field of a transmission electron microscope due to central displacement of the rotatingshaft.

The invention relates to a laser displacement transducer mounting support provided with an adjusting and self-calibrating structure. The laser displacement transducer mounting support comprises an upper adjusting frame, a pre-tightening spring, a lower adjusting frame, an adjusting bolt and a transducer base frame provided with a transducer. The transducer base frame is fixed on the upper adjusting frame. The lower end face of the upper adjusting frame and the upper end face of the lower adjusting frame are connected by virtue of a dovetail groove structure with inclination, the right end face of the upper adjusting frame is provided with an adjusting screwed hole, a right boss of the lower adjusting frame is internally connected with the adjusting bolt, the upper adjusting frame and the lower adjusting frame are connected in an adjustable way by virtue of the adjusting bolt and the screwed hole, the pre-tightening spring is sheathed outside the adjusting bolt, and the two ends of the pre-tightening spring are respectively connected with the right end face of the upper adjusting frame and the inner end face of the right boss of the lower adjusting frame in a compressed manner. When the laser displacement transducer mounting support provided by the invention is used for carrying out adjustment and preliminary calibration in a laser displacement transducer application field, auxiliary materials, devices or tools are not required to complete the adjustment and preliminary calibration, the laser displacement transducer mounting support provided by the invention is convenient to use and is provided with a corresponding standard, and displacement control accuracy is high.

The invention provides an integrated intelligent temperature measuring device for a high-voltage switchgear, which includes a switchgear body, a temperature measuring actuator, a temperature measuring control module and a man-machine docking module. In the device room, the temperature measurement actuator includes a horizontal movement mechanism, a rotation mechanism, a second adjustment mechanism, a third adjustment mechanism, and a temperature measurement probe connected in sequence from top to bottom. The temperature measurement control module is connected with the temperature measurement actuator and the man-machine. Modules are connected accordingly. Through the human-machine docking module in the present invention, the temperature measurement of the upper and lower three-phase static contacts of the circuit breaker by the temperature measurement actuator can be realized, thereby realizing the automatic test of the contact temperature of the circuit breaker, which not only reduces the labor of workers strength, while improving the efficiency of temperature measurement.

The invention relates to a multi-degree-of-freedom sample rod. The sample rod is provided with a nano positioning device, wherein the nano positioning device comprises a driving part, the driving partis a piezoceramic tube, the piezoceramic tube is a hollow tube body, one end of the piezoceramic tube is fixedly connected with a joint ball, and the other end is installed on the sample rod; the piezoceramic tube is provided with an inner surface and an outer surface, one surface of the piezoceramic tube is provided with a plurality of conductive area groups, each conductive area group comprisestwo symmetric conductive areas, the conductive areas are independent from each other, and each conductive area is provided with a conductive wire; and the other surface of the piezoceramic tube is awhole area conductive part. The multi-degree-of-freedom sample rod has three degrees of freedom, i.e. translation along the axis X, translation along the axis Y and rotation along the axis Z and has the advantage that the performance is stable when in reutilization.

The invention discloses a turning chatter suppression device based on a piezoelectric ceramic driver. The turning chatter suppression device comprises a tool rest, a flexible hinge, the piezoelectric ceramic driver, a front flange plate, a rear flange plate, a flexible connector, a vibrating sensor and a controller. The front end of the piezoelectric ceramic driver is connected with the rear end of the front flange plate through the flexible connector, the front end of the front flange plate is fixedly connected with the front end of the tool rest, and the rear end of the piezoelectric ceramic driver is fixedly connected with the rear end of the tool rest through the rear flange plate; the controlled is electrically connected with the vibrating sensor and the piezoelectric ceramic driver; the upper part and the lower part of the flexible hinge are provided with an elastic bending sheet respectively. When precision turning is carried out through the turning chatter suppression device, real-time online position regulation on a tool can be achieved; the turning chatter suppression device has the advantages of being simple in structure, high in rigidity, displacement control precision, response speed and output force, low in power consumption and the like, and can effectively suppress generation of turning chattering.

The invention discloses a multi-degree-of-freedom sample rod with self-positioning function, which includes a shell and a rotating shaft, the shell and the rotating shaft are coaxial, the shell has an inner cavity, the rotating shaft is located in the inner cavity of the shell, and a self-positioning mechanism is arranged in the inner cavity. No matter how the rotating shaft rotates, due to the function of the self-positioning mechanism, the central axis of the rotating shaft can always be automatically reset to the original position, so as to avoid the area to be observed of the sample from the observation field of the transmission electron microscope caused by the shift of the rotating shaft center.

The invention relates to the technical field of hydraulic cylinder control, and discloses a high-precision displacement control hydraulic cylinder system and a control method thereof. The system comprises a controller, a hydraulic cylinder, a first displacement sensor and a second displacement sensor. The first displacement sensor and the second displacement sensor are both used for detecting displacement of an output rod of the hydraulic cylinder, and the measuring range of the first displacement sensor is larger than the measuring range of the second displacement sensor. The controller can receive displacement feedback signals of the first displacement sensor and the second displacement sensor and select a main feedback signal, and can control the hydraulic cylinder to act. The high-precision displacement control hydraulic cylinder system and the control method thereof make the hydraulic cylinder have a large stroke, and can improve the displacement control precision substantially within a small stroke range at the same time; and according to the hydraulic cylinder system, machining is easy to implement, the application fields of the hydraulic cylinder are broadened, the universality is high, and the high-precision displacement control hydraulic cylinder system and the control method thereof can be widely applied to displacement control hydraulic systems such as hydraulic type vibrating tables.

The invention discloses a multi-degree-of-freedom sample rod. The sample rod comprises a framework and a rotating shaft, wherein a magnet is arranged at a tail end of the rotating shaft, the frameworkis provided with a leading-out circuit board, the framework is provided with a notch, the leading-out circuit board comprises a bent part, the bent part is located in the notch, and a magnetic fieldsensor is fixed to the bent part. The sample rod is advantaged in that the position information of the rotating shaft can be detected, when the rotating shaft rotates and moves back and forth, the magnetic field changes accordingly, the magnetic field sensor measures the magnetic field, the position information of the rotating shaft can be obtained through solving, the magnetic field sensor can befixed through soldering tin connection between the magnetic field sensor and the leading-out circuit board, short circuit of one pair of pins on the leading-out circuit board can be conducted, and the number of wires needing to be connected is reduced; the leading-out circuit board comprises a plane part and a bending part, the plane part and the bending part are vertically laid on a surface of the framework, the magnetic field sensor is fixed to the bending part, and the bending circuit board is small in occupied area and easy to disassemble.