64results about How to "Fast compensation" patented technology

The invention discloses a triangular connection type comprehensive compensation system integrated with a cascaded active filter and a reactive compensator. The system comprises triangular connection type N-grade cascaded converters and a three-phase filter inductor connected with each N-grade cascaded converter; triangular connection type thyristor reactors and star-shaped connection type thyristors are used for switching the reactive compensator composed of fixed capacitors; and the triangular connection type N-grade cascaded converters and the reactive compensator are connected in parallel between a connection node and a ground node of an input power grid voltage and a load. According to the system provided by the invention, reactive power and harmonic current in a medium-voltage power grid are subjected to dynamic compensation and the efficiency of the power grid is improved; when the system is used for compensating, the system has no negative influences on the power grid, and has advantages of stable system, simple structure, strong stability and flexibility in compensation.

The invention provides a silicon pressure sensor temperature compensation method based on an extreme learning machine. The method is characterized in that data sources acquired under different temperature are used as the sample data for building a temperature compensation model of the extreme learning machine, and then silicon pressure sensor temperature compensation model of the extreme learning machine is learnt and verified according to a training sample and a testing sample. The method has the advantages that little characteristic variable is needed, the compensation is fast, the precision is high, and the number of the optimal hidden nodes is independently selected.

The invention discloses a positioning compensation method and device for a robot. The method comprises the following steps of acquiring a moving point set of the robot moving in a preset space lattice, wherein the space lattice is a lattice divided by a cube of a preset step size in a working area of the robot; carrying out moving point set training to obtain an error compensation model, wherein the error compensation model is a model established according to an error compensation parameter between a theoretical position of a flange center point and an actual position of the robot; acquiring actual coordinates of a target position to be arrived by the robot; calculating a compensation parameter of the robot moving to the actual coordinates by means of the error compensation parameter, wherein the compensation parameter is used for compensating a positioning precision of the robot moving to the actual coordinates; and controlling the robot to arrive in the target position based on the compensation parameter. The positioning compensation method solves the technical problem that the positioning precision compensation demand of the robot cannot be met as robot is relatively low in positioning error compensation speed and low in adaptability in the prior art.

The invention discloses a display panel, a driving method thereof and a display device. The display panel comprises a plurality of sub-pixels arranged in an array, a plurality of data lines and a plurality of compensation detection lines. Each data line is electrically connected with a column of sub-pixels. Every three columns of sub-pixels are used as a first sub-pixel group, and each first sub-pixel group corresponds to two compensation detection lines and comprises a first detection line and a second detection line. In each first sub-pixel group, the first column of sub-pixels are electrically connected with the first detection line, the third column of sub-pixels are electrically connected with the second detection line, and the second column of sub-pixels are alternately and electrically connected with the first detection line and the second detection line. In the display panel, for each first sub-pixel group, two sub-pixels connected with different compensation detection lines can be selected from two adjacent rows of sub-pixels to be compensated together, so that every two rows of sub-pixels only need to be compensated for three times, the compensation speed is increased toa great extent, the display time is relatively long, and the display effect is improved.

The invention provides an inductosyn angle measurement error analysis and compensation method and belongs to the technical field of detection. The method comprises: using a high-precision single-axistest rotary table as an angle measurement reference and using the least squares identification method to analyze respective harmonics of the angle measurement of the inductosyn; making targeted hardware adjustment according to an analysis result; acquiring error data again as a compensation sampling point, and using the linear interpolation method to compensate the angle measurement error software. The method solves the problems that the existing inductosyn analysis and compensation method is incomprehensive in analysis, unsatisfactory in compensation effect, limited in the number of samplingpoints, low in efficiency, and difficult in model creation.

A quartz resonance differential accelerometer temperature compensation method comprises the following steps: frequency signals f1 and f2, a temperature signal T and an acceleration a output by an accelerometer and a temperature sensor are collected; zero offset K0, a scale factor K1 and a second-order nonlinear coefficient K2 of a static mathematical model of the accelerometer at different temperatures are calculated, and f1, f2, T, a, K0, K1 and K2 form a data source; data sources under different temperature and acceleration conditions are selected as initial sample data, and the sample datais preprocessed and divided into a training sample and a verification sample; related parameters of a self-increment extreme learning machine are set; model learning and verification are carried out by taking the sample data as the input of a temperature compensation model of the auto-increment extreme learning machine; and the preprocessed measured frequency signals f1 and f2 and temperature signal T are input for model prediction. The method not only has the advantages of high compensation speed and self-determination of the number of hidden nodes, but also has an accelerometer calibration function.

The invention discloses a large pentahedral gantry machining center and a method for compensating the deformation of a movable cross beam. The machining center comprises two fixed cross beams, a moveable cross beam, a workbench and the like, wherein the two fixed cross beams are respectively arranged on a left upright post and a right upright post; an X-axis linear guide rail is arranged on the fixed cross beams; X-axis slide blocks are arranged on the X-axis linear guide rail; the moveable cross beam is connected with the X-axis slide blocks; an X-axis linear motor drives the X-axis slide blocks to move along the X-axis linear guide rail; a Y-axis linear guide rail is arranged on the moveable cross beam; Y-axis slide blocks are arranged on the Y-axis linear guide rail; a slide saddle is connected with the Y-axis slide blocks; a Y-axis driving motor drives the Y-axis slide blocks to move along the Y-axis linear guide rail; a Z-axis linear guide rail is arranged on the slide saddle; Z-axis slide blocks are arranged on the Z-axis linear guide rail; a ram is connected with the Z-axis slide blocks; a Z-axis driving motor drives the Z-axis slide blocks to move along the Z-axis linear guide rail; a main shaft unit comprises an A-shaft rotary driving shaft and a C-shaft rotary driving shaft and is arranged on the ram. The machining center is applied to the high-speed and high-precision machining places of large parts.

The invention discloses a novel system and method for managing electrification railway electric energy quality, wherein the system comprises a traction transformer with a filter winding, a sensing filter circuit, an MMC compensation system, an MMC controller, a voltage and electric current measuring apparatus; the traction transformer high voltage side is connected to electric network; a traction side is connected to a traction arm of an electric locomotive for providing electric power for the electric locomotive; and a low voltage compensation side is connected to the sensing filter circuit and the MMC compensation system. The MMC compensation system is constituted by two connected to single-phase MMC traction arm groups; direct current sides of the two MMC traction arm groups are connected together through a serial capacitor; and a grounding point of the MMC compensation system is led out in the geometric midpoint of the serial capacitor. With the method, harmonic waves are dynamically tracked and suppressed through the MMC technology and the sensing filter technology; active power balance and reactive power adjustment are performed to the load at two traction sides, thereby achieving the purposes of managing the harmonic waves, reactive power and negative sequence of the traction transformer high-voltage side of the electrification railway.

The invention discloses a pixel circuit, a driving method thereof and a display device. The pixel circuit comprises a write-in sub-circuit, a light-emitting control sub-circuit, a sensing sub-circuit,a driving sub-circuit and a light-emitting element, wherein the write-in sub-circuit provides a first reference voltage signal or a data voltage signal of a data line for a first node under the control of a first scanning line; the light-emitting control sub-circuit provides a signal of a first power supply voltage end for a second node under the control of a third scanning line; the sensing sub-circuit provides a second reference voltage signal of the sensing line for a third node under the control of a second scanning line; the driving sub-circuit performs voltage compensation on the thirdnode under the control of the first node and generates a first driving current for driving the light-emitting element to emit light. Internal compensation and external compensation can be realized atthe same time so that the compensation speed can be enhanced, the compensation range can be expanded and the display quality of the display device can be enhanced.

The invention discloses an electric network positive and negative reactive power compensation device which is applied to compensate the voltage and the reactive power of an electric network. The electric network positive and negative reactive power compensation device comprises a pressure regulator (2), one or a plurality of capacitors (9) and one or a plurality of reactors (6), wherein the line inlet end of the pressure regulator (2) is connected with a bus (7) by a circuit breaker (1); the capacitor (9) and the reactor (6) are connected with the line outlet end of the pressure regulator by one or a plurality of switches; after being connected with the reactor and the switch (4) connected in front of the reactor in parallel, the capacitor and the switch (3) connected in front of the capacitor are connected to the line outlet end of the pressure regulator (2); and the reactor is connected to the inside of a branch circuit of the capacitor in series. The invention provides a still reactive power compensation device which can supply capacitive compensation and inductive compensation, regulates the reactive power output of the capacitor and the reactor by regulating the output voltage of the pressure regulator, does not switch the capacitor at rated voltage, prevents serious overvoltage and inrush current and can realize finite order fine regulation in a total range from rated capacitive compensation capacity to rated inductive compensation capacity.

The invention relates to the technical field of robots, and discloses a method for compensating friction force or friction torque. The method for compensating the friction force or the friction torquecomprises the steps that the current output force/the current output torque of a controller in a closed-loop control system is obtained, the previous friction force/friction torque is compensated according to the current output force/the current output torque, and the current friction force/the current friction torque is obtained, the current output force/current output torque is compensated according to the current friction force/current friction torque to obtain a force control value/torque control value, and the actuating mechanism is controlled according to the force control value/torquecontrol value. By adopting the method for compensating the friction force or the friction torque, the friction force can be compensated more quickly. The invention further discloses a device for compensating the friction force or the friction torque and a rehabilitation robot.

A magnetic compensation floating side plate combination piece comprises an inner side plate (5), an outer side plate (6), an arc-shaped high-pressure oil groove (1), an unloading groove (2), an arc-shaped groove (3) and an arc-shaped through hole (4). The arc-shaped high-pressure oil groove (1) and the unloading groove (2) are located in a reverse thrust face (P) of the inner side plate (5), the arc-shaped groove (3) is located in a compensation face (Q) of the inner side plate (5), the arc-shaped through hole (4) is located in the outer side plate (6), and the inner side plate (5) and the outer side plate (6) are mutually embedded and positioned. The arc-shaped groove (3) and the arc-shaped through hole (4) are the same in shape, and magnetic strips are embedded into the arc-shaped groove (3) and the arc-shaped through hole (4). According to the magnetic compensation floating side plate combination piece, the magnetic force generated by repelling of the same magnetic poles of the magnetic strips serves as compensation force to achieve rapid compensation, the deformation condition, caused by high-pressure oil on the back faces of flotation side plates, of a sealing ring is improved, the problems that existing gear pump flotation side plates are seriously abraded and the compensation effect is not ideal are solved, and the magnetic compensation floating side plate combination piece is especially suitable for serving as an axial sealing device of a gear pump under the high-temperature, high-pressure and high-speed working conditions.

The invention discloses an arc extinction grounding device. The arc extinction grounding device comprises an electric reactor, a current conversion chain, a phase-shifting transformer, a main controller, a voltage transformer and a current transformer. The main controller collects the voltage of a neutral point of a power grid by the voltage transformer, calculates the voltage output by the current conversion chain according to the collected voltage, and transmits a corresponding motion signal to control the voltage which is actually output by the current conversion chain to control the compensating current which is injected by the arc extinction grounding device to the power grid, so as to extinct arcs. The current conversion chain is used, and the compensating current is controlled by adjusting the output voltage of the current conversion chain, so that compared with traditional technical means, the arc extinction grounding device has the advantages of high compensating speed and precision; and moreover, electric reactors and capacitors which are large in capacity are eliminated, so that the running loss of the arc extinction grounding device is effectively reduced.

The invention provides an IMU-enhanced event camera optical flow estimation method and a system, and the method comprises the steps: firstly reconstructing a fuzzy brightness image at any moment intoa clear brightness image through an EDI model, building a basic optical flow model through combining with a brightness constant hypothesis, and enabling the EDI to represent event-based double integration; then adding the IMU as a constraint into a basic optical flow model to realize continuous optical flow estimation in any motion consistent scene; separating a background and a foreground for processing when a hybrid motion scene appears, introducing IMU constraints during background optical flow estimation, introducing sparse constraints during foreground optical flow estimation, jointly estimating the background optical flow and the foreground optical flow of the hybrid motion scene through an alternate iterative updating mode, and finally, the overall continuous optical flow of the scene is obtained through combination. The method is suitable for scenes comprise a motion consistency scene in which a single background moves or a foreground object moves consistently, and a mixed motion scene in which the background and the foreground move in different directions and sizes.

The invention discloses a cogging torque compensation method of a permanent magnet synchronous servo motor, relates to a cogging torque compensation technology of the permanent magnet synchronous servo motor, and aims to solve the problems of heavy accurate modeling operation burden and low discrete table lookup accuracy in the existing cogging torque compensation method. The cogging torque compensation method comprises the following steps of: acquiring data of cogging torque of the permanent magnet synchronous servo motor to obtain accurate cogging torque data, and establishing an accurate cogging torque lookup table; and performing feedforward control on the cogging torque of the permanent magnet synchronous servo motor based on the cogging torque accurate lookup table to realize compensation of the cogging torque of the permanent magnet synchronous servo motor. The cogging torque compensation method has the advantages that a precise permanent magnet synchronous servo motor mathematical model is not needed, a large amount of cogging torque data is calculated, and the problem that the cogging torque data obtained through an existing lookup table method is poor in precision can be solved.

The invention discloses a fed paper cutting position adjustment and compensation device of a packing machine. The device comprises a power input shaft, an input gear fixedly connected with the power input shaft and a power output shaft, wherein the input gear is engaged with a planetary gear mechanism on the power output shaft, and a rotary arm in the planetary gear mechanism is connected with a velocity compensation and locking mechanism to form a differential gear transmission structure. The planetary gear mechanism is used as a compensation device, and a compensation displacement angle is superposed to the power output shaft in a mode of superposing a compensation velocity and a main shaft feeding velocity, so fed paper cutting position adjustment and compensation are realized and can be performed in a main shaft clearance or continuous paper feeding; and the device has the advantages of high precision, high compensation velocity and capability of automatically judging the compensation direction according to the main shaft feeding condition to perform positive or negative compensation, meanwhile, has pre-adjusting function, can track color codes after first startup or packing material change, and has high product qualification rate.

The invention discloses an unbalanced load based flying capacitor type modular multi-level reactive compensation device. A traditional control strategy is to detect reactive component to serve as reference of compensating current; and the compensation precision greatly depends on a voltage and current sampling and detection scheme. The unbalanced load based flying capacitor type modular multi-level reactive compensation device comprises a primary circuit which comprises an inductor connected with an electric grid; the inductor is connected with a flying capacitor type modular multi-level cascade inverter (1); the flying capacitor type modular multi-level cascade inverter is connected with a DC voltage sampling circuit (2); the inductor is connected with an inverter AC sampling circuit (3);the DSP chip (4) is respectively connected with the DC voltage sampling circuit, the inverter AC sampling circuit, an electric grid voltage detection circuit (5), an electric grid load AC sampling circuit (6) and an FPGA chip (7); and the FPGA chip is connected with a drive circuit (8). The unbalanced load based flying capacitor type modular multi-level reactive compensation device is applied tothe unbalanced load based flying capacitor type modular multi-level reactive compensation device.

A six-degree-of-freedom non-decoupling mechanism tail end pose error compensating method in a time-varying temperature field is provided. The method comprises steps of: establishing a deformation error database related to an external object; determining the actual position of the tail end of the external object after the temperature of the temperature field changes; comparing the actual position and the ideal position of the tail end of the external object to determine the positional deviation value of the tail end of the external object; determining an adjusted value required to be adjusted of the position of the tail end of the external object according to the deviation value of the external object and the deformation error database; and adjusting the position of the tail end of the external object by using the six-degree-of-freedom non-decoupling mechanism according to the adjusted value required to be adjusted of the position of the tail end of the external object. The compensation of the micro change of the position of the tail end of the six-degree-of-freedom non-decoupling mechanism caused by the six-degree-of-freedom non-decoupling mechanism time-varying temperature field external object module error compensation method in a stable inconstant state due to thermal expansion and contraction can improve the motion pose accuracy of the external object.

The invention discloses a transaction compensation method and device, relates to the technical field of financial payment, and aims to realize second-level response of transaction compensation when payment transaction is abnormal and improve the payment experience of a user. The method comprises the steps of obtaining a transaction order with a changed state from a service system; calculating compensation initiation time of each transaction order based on the update time of the transaction order and compensation time of the corresponding transaction order in the task configuration table; caching the transaction orders to a memory queue according to the sequence of the compensation initiation time; and regularly scanning the order tasks in the memory queue, and notifying the service systemto initiate a compensation action to the corresponding transaction order when the compensation initiation time is up. The device applies the method provided by the scheme.

The invention discloses a pixel driving circuit, a driving method of the pixel driving circuit, a display panel and a display device. The pixel driving circuit comprises a drive circuit, an energy storage circuit; a data and sensing line; a first initialization circuit; a second initialization circuit and a data writing circuit, wherein in the display mode, the data and sensing line writes data voltage into the control end of the driving circuit through the data write-in circuit; in the sensing mode, the data and sensing line receives the sensing data output by the driving circuit through thesecond initialization circuit to obtain external compensation value of the drive circuit; therefore, the data lines and the sensing lines are combined, the number of source-level driving chip channelscan be reduced, meanwhile, the accuracy of the obtained external compensation value can be ensured, the physical resolution of the panel can be improved, and the compensation speed can be increased.

The invention discloses a system and a method for optimizing rotor vibration compensation through using variable-step variable-angle search genetic algorithm of a bearingless permanent magnet synchronous motor. The method comprises the steps that a rotating speed serves as the input of an improved wave trap, and sine and cosine coefficients of vibration signals with the same frequency as a rotor in the x and y directions of the rotor are output by the improved wave trap, the sine coefficient and the cosine coefficient are input into an unbalance compensation module, the unbalance compensation module compares the total vibration amplitude with a vibration target value, if the total vibration amplitude is larger than the vibration target value, compensation control is conducted on rotor vibration through adopting a variable-step-size variable-angle search method, when the vibration of the next step is smaller than that of the previous step, the step size and the angle are increased, and when the vibration of the next step is larger than that of the previous step, the angle is changed by 90 degrees and the step length is changed into the initial search step length. Therefore, the search angle and direction are continuously changed to obtain an identification coefficient, and the optimal compensation current is calculated; and a response speed of rotor vibration compensation is accelerated, and rotor vibration compensation can be carried out under the condition that the motor runs at a full rotating speed.

The invention discloses a DC offset compensation system, comprising: a signal processing circuit, a first compensation module, a second compensation module and a third compensation module. The first compensation module is configured to compensate a DC offset of a second sub-processing circuit in the signal processing circuit, so that a first DC offset value output by the signal processing circuitis less than or equal to a first threshold; the second compensation module is configured to compensate the DC offset of a first sub-processing circuit based on the first DC offset value, so that a second DC offset value output by the signal processing circuit is less than or equal to a second threshold; and the third compensation module is configured to compensate the DC offset of the signal processing circuit based on the second DC offset value, so that a third DC offset value output by the signal processing circuit is less than or equal to a third threshold. The invention further discloses aDC offset compensation method.