27results about How to "High compensation accuracy" patented technology

The embodiment of the invention discloses a harmonic compensation method for an angle error of a magnetic encoder, and the method comprises the steps: enabling the magnetic encoder to rotate at a constant speed in a setting mode, collecting sine and cosine signals outputted by the magnetic encoder, and carrying out the calculation through CORDIC, thereby obtaining an initial angle sequence containing a fundamental wave error and a harmonic wave error; extracting each harmonic component through an adaptive wave trap, constructing a harmonic compensation polynomial, and storing each coefficient; in an application mode, a magnetic encoder signal is collected in real time, a current initial angle value is solved, a harmonic compensation amount is calculated according to a current fundamental wave angular frequency and a stored coefficient, and an accurate angle value is obtained by subtracting the compensation amount from the initial angle value. According to the method, external reference signals and a large amount of storage space are not needed, each harmonic error is directly eliminated through a harmonic compensation polynomial, and approximate errors caused by traditional linear interpolation are avoided; and the compensation precision can be improved only by increasing polynomial terms, and the storage requirement is not obviously increased.

The invention discloses a method for calculating secondary ripple current of a single-phase PWM (Pulse Width Modulation) rectifier, which comprises the following steps of: A, obtaining input voltage us and input current is of the rectifier through sampling, and respectively obtaining orthogonal components us alpha and us beta of the voltage and orthogonal components is alpha and is beta of the current through orthogonal transformation or delay of a quarter period; respectively calculating a voltage amplitude Us and a current amplitude Is; the included angle between the input voltage and the current is phi, namely a power factor angle; b, the active power P and the reactive power Q of the input power of the rectifier are calculated, and then the power factor angle phi of the grid-side current and the voltage is calculated; obtaining the angular velocity omega of the input voltage by using a phase-locked loop; c, according to the inductance value L, the voltage amplitude Us, the current amplitude Is, the power factor angle phi and the angular velocity omega of the PWM rectifier, the alternating current side secondary pulsation power Pshc of the rectifier is calculated; and D, calculating the secondary ripple current of the DC side of the PWM rectifier in real time by using the PWM DC side given voltage Vdcref and the AC side secondary pulse power Pshc. The method is different from a method for obtaining the reference value of the secondary ripple current on the DC side of the PWM rectifier by adopting current sampling and filtering and the like, and the reference value of the secondary ripple current is directly calculated by directly utilizing the existing parameters of the PWM rectifier; and the precision of the secondary ripple current reference value is further improved on the basis of eliminating a current sensor and a circuit thereof.

The invention belongs to the related technical field of aero-engine manufacturing and precision repair, and discloses a blade repair path follow-up compensation method and device based on non-rigid matching, and the method comprises the steps: S1, reconstructing a machining error reference point cloud curved surface based on a scanning data point set and a repair region design model; s2, performing unified modeling on the static deviation of the machining error of the to-be-compensated blade to obtain an error transfer model, and simplifying the corresponding nonlinear comprehensive machining error into a calculation equation of linear pose deviation of a local workpiece coordinate system; s3, establishing a tangent contact approximation cost function based on non-rigid matching so as to register and approach a target curved surface under the constraint of retaining tool path features, and meanwhile, solving a calculation equation by adopting a least square method so as to obtain a linear pose deviation of a local workpiece coordinate system, solving to obtain a pose deviation of each tangent contact coordinate system so as to obtain a linear pose deviation of each tangent contact coordinate system; and furthermore, each cutting contact and each cutter location point are updated, and the shape follow-up compensation of the blade is realized. The compensation precision is improved.

The application discloses a compensation method and device of a display panel and display equipment. The compensation method of the display panel comprises the following steps: acquiring an actual capacitance value of the display panel corresponding to the position of a sub-pixel, and determining an actual temperature value of the display panel corresponding to the position of the sub-pixel according to the actual capacitance value and a capacitance value-temperature relationship; and compensating a data voltage corresponding to the sub-pixel according to the actual temperature value corresponding to the sub-pixel. The technical scheme of the application improves the use performance of the display panel.

The application discloses a kind of high furnace cloth chute inclination and material line compensation method, comprising: selecting a cloth inclination as reference inclination, and obtaining its corresponding reference material line height;Actual material line height of current high furnace is obtained, and the height difference with reference line is calculated;Material flow trajectory is divided into N continuous compensation intervals according to height difference;Pre-calculate the endpoint compensation value of each compensation interval, and the endpoint compensation value is the angle compensation amount that reference inclination needs to adjust at current material line height to keep the radial position of cloth drop point unchanged relative to reference material line;Determine the compensation interval where actual material line height difference is located, and the actual compensation angle corresponding to actual material line height difference is calculated using linear interpolation according to the upper and lower endpoint compensation value of the interval;Actual compensation angle is applied to reference inclination, and the cloth inclination that should be executed at current actual material line height is obtained.The application realizes the accurate compensation of chute inclination angle to material line height difference.

The invention discloses a screen shooting image moire quantification method and device and a storage medium, which are used for improving the compensation precision of a display screen. Acquiring a sub-pixel unit image of the display screen to be tested; performing brightness compensation processing on the sub-pixel unit image to generate an expected brightness compensation image; generating a compensation graph frequency spectrum amplitude image according to the brightness compensation image; generating a stripe frequency band sensing image according to the visual distance and the pixel pitch corresponding to the target color channel; carrying out region division on the frequency spectrum amplitude image of the compensation graph; standard deviations of the elliptical region and the plurality of elliptical ring regions are calculated, and a region standard deviation set is generated; filling a blank image with the standard deviation in the regional standard deviation set to generate a first elliptical ring standard deviation image; performing frequency domain filtering on the first elliptical ring standard deviation image by using the stripe frequency band sensing image to generate a first frequency domain filtering image; and generating a first moire quantization value corresponding to the brightness compensation image according to the compensation image frequency spectrum amplitude image and the first frequency domain filtering image.

This invention relates to the field of photosensitivity correction technology, and provides a method and system for photosensitivity correction based on dynamic temperature difference compensation. The method includes: in an experimental environment, weighted summation of temperature difference compensation coefficient, distance compensation coefficient, and wavelength compensation coefficient to obtain a comprehensive compensation coefficient; calculating the product of the photosensitivity acquisition value and the comprehensive compensation coefficient to obtain the compensated target photosensitivity value, and performing photoelectric conversion error correction and signal amplification noise filtering to obtain the corrected photosensitivity value; calculating the deviation from the standard photometer data; adjusting the weights according to the deviation using a gradient descent method until the deviation reaches the target, forming a weight lookup table for different temperature values, measurement distances, and illumination wavelengths; in practical applications, determining the weights based on the weight lookup table, and weighted summation of the temperature difference compensation coefficient, distance compensation coefficient, and wavelength compensation coefficient to obtain the comprehensive compensation coefficient, which is used to compensate and correct the photosensitivity acquisition value. The compensation accuracy is significantly improved.

The invention relates to a broadband signal response compensation method and device for an underwater simulation sound source, and the method comprises the following steps: 1, setting the basic parameters of a compensation method, such as the number of iterations, and initializing the frequency response of a filter; 2, generating an ideal digital output signal, and calculating a power spectrum of the ideal digital output signal; step 3, filtering the ideal output signal; and step 4, outputting the filtered signal through a transmission channel, and calculating the power spectrum of the actual output signal. According to the method, complex changes caused by nonlinear characteristics of the system can be accurately captured, so that step-by-step optimization of the simulated sound source is realized in the compensation process.

The invention discloses an improved MPC adaptive time delay compensation method based on unscented Kalman filtering, belongs to the technical field of structural anti-seismic tests, and is used for solving the problems of time delay, multi-actuator coupling and noise interference in a multi-axis real-time mixing test. The method comprises the steps that system parameters and UKF initial values are calibrated in an off-line mode; seismic excitation is input into the numerical value substructure, and the expected displacement of the actuator is obtained through coordinate transformation; uKF optimal state estimation is used as an initial condition, and MPC rolling optimization is adopted to solve a control instruction; loading the physical substructure and acquiring actually measured displacement and counter force; inputting measured data into the UKF for nonlinear filtering, and outputting updated state estimation; and finally, state estimation and actually measured counter force are fed back to the numerical substructure, the expected displacement is updated, the steps are repeated, and closed-loop self-adaptive compensation is formed. The precision and robustness of multi-axis loading control can be effectively improved, and the method is suitable for complex structure anti-seismic tests in the field of civil engineering.

This invention provides a precision compensation method for a serial six-axis robot, comprising the following steps: S1. Constructing a finite element simulation model of the serial six-axis robot; S2. Obtaining the link stiffness, joint torsional stiffness, and joint overturning stiffness under stress in the finite element simulation model of the serial six-axis robot; S3. Calculating the force and torque on the link, and the torque and overturning torque on the joint; S4. Calculating the deformation and angle changes of the link, and the angle changes of the joint; S5. Determining the changes in DH parameters and the end effector pose; S6. Determining the compensated DH parameter model and the end effector pose; S7. Controlling the serial six-axis robot according to the compensated DH parameter model and the end effector pose to achieve precision compensation. Through the above method, the compensation precision of the serial six-axis robot can be improved, thereby improving the control precision of the serial six-axis robot.

The invention belongs to the technical field of display driving, and particularly relates to a driving circuit, a driving method and a touch display device.The driving circuit comprises a power module which is configured to provide a reference common voltage; the control module is configured to determine a target touch sensing block needing voltage compensation according to image display information and generate a compensation control signal corresponding to the target touch sensing block; the at least one compensation module is configured to compensate the reference common voltage according to the compensation control signal to obtain a target common voltage; the at least one switch module is configured to apply the target common voltage to the common electrode of the target touch sensing block under the control of the control module; through cooperative work of the control module, the compensation module and the switch module, the cross grain compensation precision is improved, and meanwhile, the hardware cost and the system complexity are effectively prevented from being increased.

The invention provides an error compensation method and system for a hybrid machine tool, electronic equipment and a storage medium, and relates to the technical field of numerical control machining. The method comprises the following steps: determining a mapping relation between a movable platform pose and a branch chain of a parallel mechanism of the hybrid machine tool to establish a first kinematic model, and determining a geometric error term of a motion axis of a series mechanism of the hybrid machine tool to establish a corresponding inter-axis transformation matrix to establish a second kinematic model, determining a first error amount of a parallel mechanism and a second error amount of a series mechanism of the hybrid machine tool, and performing compensation amount synthesis and re-decomposition on the first error amount and the second error amount according to the first kinematic model and the second kinematic model to determine a corresponding compensation instruction, the space errors of the parallel mechanism and the serial mechanism can be cooperatively compensated, and the compensation precision of the overall space error of the hybrid machine tool is improved.

The application relates to the field of water-saving irrigation technology, in particular to a low-power water-saving control irrigation system under complex terrain, which comprises a drip irrigation pipe and a plurality of drip irrigation heads, each drip irrigation head comprises a main cylinder, a core cylinder and a pressure-compensated dripper, one end of the main cylinder is located in the drip irrigation pipe, the core cylinder is slidably arranged in the main cylinder in the axial direction of the main cylinder and separates the main cylinder into a first chamber and a second chamber, the first chamber is communicated with the drip irrigation pipe, a Tesla valve flow channel is arranged between the core cylinder and the main cylinder, the first chamber and the second chamber are communicated through the Tesla valve flow channel, and the water in the first chamber is in deceleration when passing through the Tesla valve flow channel; the pressure-compensated dripper is arranged at the end of the main cylinder far from the drip irrigation pipe and is communicated with the second chamber; the Tesla valve flow channel is arranged to reduce the pressure of the high-pressure water in the first chamber, the water pressure in the second chamber is reduced, and therefore the pressure-compensated dripper with a smaller compensation range can be used, and the compensation precision is improved.

The application relates to a robot joint motion compensation method, system and storage medium. The method comprises the following steps: in the case that the amplitude of a disturbance signal is greater than a safety threshold, predicting a disturbance compensation amount of each joint, and performing negative feedback adjustment on the corresponding joint based on the corresponding disturbance compensation amount of each joint; in the case that the amplitude of a vibration signal is greater than a safety threshold, predicting a vibration compensation amount of each joint, and performing negative feedback adjustment on each joint of the robot based on the corresponding vibration compensation amount of each joint. The method can compensate the mechanical arm based on the disturbance compensation amount and the vibration compensation amount respectively, realize the effect of real-time compensation of coupling force disturbance and vibration in the scene without increasing damping elements or through signal filtering, has high compensation precision, and is suitable for coupling force disturbance compensation and vibration compensation in different scenes.

This invention discloses a soil testing method for soil pollution prevention and control, belonging to the technical field of soil testing methods. The method includes the following steps: acquiring near-infrared spectral data of the soil sample to be tested; analyzing the influence of light intensity on the spectral curve; calculating an initial light intensity compensation coefficient; obtaining compensation coefficient constraints; within these constraints, arithmetically increasing and decreasing the initial light intensity compensation coefficient to obtain several light intensity compensation coefficients to be screened; simultaneously performing light compensation processing on the spectral curve of the soil sample to be tested based on the light intensity compensation coefficients to be screened, and detecting heavy metal components in the soil; acquiring feedback data from the heavy metal component detection; and training a compensation coefficient evaluation model based on a neural network; mapping and fitting a screening curve according to the compensation coefficient evaluation model and the corresponding light intensity compensation coefficients to be screened; analyzing and selecting the optimal light intensity compensation coefficient, which can be applied to large-scale soil testing.

The application discloses a turntable type coherent laser communication system with polarization compensation and a compensation method. The device is composed of a laser light source, a collimating mirror, a polarization beam splitter, a rear optical path, a half-wave plate, a quarter-wave plate, a through-axis optical path and a telescope system. The light emitted by the laser light source is collimated by the collimating mirror and is polarized into horizontal polarized light by the polarization beam splitter. The horizontal polarized light passes through the rear optical path, is modulated by the half-wave plate and the quarter-wave plate, passes through the through-axis optical path and is emitted by the telescope system. The half-wave plate and the quarter-wave plate modulate the horizontal polarized light generated by the polarization beam splitter into right circular polarized light and compensate for the additional phase delay and the rotation of the polarization base of each optical path. The phase delay of the rear optical path, the through-axis optical path and the telescope system is measured before loading, and the rotation of the polarization base is obtained in real time according to the attitudes of the azimuth axis and the pitch axis. The compensation angle of the half-wave plate and the quarter-wave plate is calculated and obtained based on the matrix corresponding to the above parameters and through the Mueller-Stokes algorithm.

The application provides a reactive power compensation device and method for dynamic load of a ship and a control terminal. Through a load sensing module, electrical parameters of a load circuit to be compensated connected to a ship power grid are collected in real time, and power parameter changes and frequency parameter changes are monitored. Through a compensation control module, a composite control strategy is adopted according to the parameters and parameter changes to generate a three-phase compensation current instruction and a compensation current modulation control signal of multiple power compensation modules to control the power compensation modules to output corresponding three-phase alternating currents, so that the reactive power compensation response can be quickly performed, the compensation accuracy is high, active control and harmonic control can be performed, active power changes can be effectively inhibited, and the power grid frequency can be stabilized, thereby solving the technical problems of the traditional static reactive power generator, such as limited response speed, compensation lag, poor compensation strategy adaptability, inconvenient expansion, and difficulty in adapting to the variable working conditions of the ship.

An optical device deformation compensation method and system, and a photolithography machine, wherein the optical device is used to transfer a pattern on a mask to a wafer, the optical device deformation compensation method comprises: determining a region with aberration in an actually formed pattern on the wafer according to a difference between the actually formed pattern and a preset pattern; obtaining a deformation compensation amount of a corresponding region of the optical device according to an actual aberration in the region with aberration; and generating a corresponding compensation control signal according to the deformation compensation amount of the corresponding region of the optical device, and controlling a corresponding compensation device to compensate the corresponding region of the optical device. By using the above scheme, the local deformation of the optical device can be accurately compensated, thereby improving the imaging quality of the optical device.

This invention provides a method, device, and medium for compensating for mold grinding errors based on grinding wheel wear, applicable to the field of machining. The method includes: acquiring a wear image of the grinding wheel to be processed; obtaining the edge contour information of the grinding wheel; determining the vertical wear height H and wear volume V of the grinding wheel; if V > V0, determining the abscissa set U of the mold point cloud; and determining the compensation correction parameter F of the i-th surface point cloud of the optical surface mold to be processed. i According to F i U i The base circle radius R of the optical surface mold to be processed base The compensation correction value Z for the i-th surface point cloud is obtained. i The invention controls a mold correction machine to correct the optical surface mold to be processed. This invention incorporates the wear factor of the grinding wheel into the error compensation process for the optical surface mold, enriching the traditional compensation evaluation indicators for optical surface molds, improving compensation accuracy, and facilitating high-precision machining of optical surface molds.

The application relates to a display panel and a display device, and relates to the technical field of display. The display panel comprises a lower substrate, a pixel definition layer and a pixel unit. The pixel definition layer is arranged on one side of the lower substrate, and comprises a plurality of spaced-apart opening regions and a non-opening region between two adjacent opening regions. The pixel unit comprises a main pixel part and an auxiliary pixel part arranged in the same opening region. The auxiliary pixel part comprises an auxiliary anode arranged on the lower substrate. The auxiliary anode extends from the side wall of the opening region to the side of the non-opening region away from the lower substrate in a direction away from the lower substrate. When the display panel is stretched, the resistance value of the auxiliary anode decreases with the increase of the stretching degree of the display panel, so that the luminous intensity of the auxiliary pixel part is enhanced. The technical scheme disclosed by the application can solve the compensation misalignment caused by the sensing of single-layer deformation in the existing compensation mode, and significantly improve the compensation accuracy.

This invention belongs to the field of parameter data management technology. It provides a data management method and system for silicone process formulation parameters, including: real-time acquisition of multiple state variable data affecting the post-processing quality of silicone products, wherein the state variable data includes inherent equipment state variables and environmental state variables; based on the acquired state variable data, a compensation rule base is invoked to calculate hierarchical and multi-factor coupled compensation values; wherein the multi-level includes: a main effect compensation layer, a coupling effect compensation layer, and an environmental fine-tuning layer. By constructing a three-level compensation architecture of main effect—coupling effect—environmental fine-tuning, it can not only handle the impact of independent changes in a single state variable on the process, but also identify and quantify the nonlinear interactions between multiple key variables, thereby improving the compensation accuracy under complex and dynamic operating conditions and reducing problems of neglecting coupling relationships between variables, leading to inaccurate compensation or overlooking certain aspects.

The invention discloses a harmonic radar nonlinear phase compensation method and system based on sparse recovery, and belongs to the technical field of harmonic synthetic aperture radar imaging. The method comprises the following steps: extracting a second harmonic component from a received harmonic echo signal; performing pulse compression by adopting an ideal reference function; randomly extracting a part of pulses from all the pulses, and constructing an observation matrix; parameterized phase fitting is carried out on the extracted pulse, and a nonlinear phase coefficient is estimated; reconstructing a full-aperture time-varying nonlinear phase trajectory through sparse recovery by using the sparsity of a phase coefficient in a transform domain; and finally, constructing a time-varying nonlinear compensation function based on the reconstructed phase, performing frequency domain compensation on the signal, and performing SAR imaging processing to obtain a harmonic synthetic aperture radar image with good focusing. Full-aperture phase reconstruction can be realized only by extracting part of pulses, and the method has the advantages of strong anti-noise capability, capability of processing spectrum distortion, avoidance of segmentation error accumulation, high compensation precision and the like.

The application relates to the technical field of precise optical machine system design, in particular to a long-focus telephoto type television wide-temperature optical axis stability passive compensation mechanism, which comprises an optical machine lens assembly, the optical machine lens assembly is externally sleeved with an integrated support matched with the optical machine lens assembly, the integrated support is fixedly arranged on a mounting bottom plate, and the rear end of the optical machine lens assembly is fixedly connected with a detector assembly; the front end of the integrated support is fixedly connected with the optical machine lens assembly, the rear end of the integrated support is slidably connected with the optical machine lens assembly, and a reserved gap is arranged between the rear end surface of the integrated support and the front end surface of the detector assembly; the compensation mechanism is applied to a television camera, axial deformation stress between the optical machine lens assembly and the integrated support caused by structural mechanical characteristic differences of the long-focus telephoto type television under a wide-temperature range can be effectively offset, and the wide-temperature optical axis stability is improved.

The utility model relates to the technical field of workpiece machining equipment, in particular to machining equipment with an equal thickness difference compensation function, which comprises a machining component mounted on a mounting seat. Wherein the machining assembly comprises a first motor, a driving shaft, a driving box, a second motor, a screw rod and a nut block, the first motor is fixedly mounted at the left end of the mounting base, the driving shaft is horizontally arranged, the left end of the driving shaft is fixedly connected with the right end of an output shaft of the first motor, and the right end of the driving shaft penetrates through the mounting base and extends to the right side of the mounting base; the driving box is fixedly installed at the right end of the driving shaft, a strip-shaped driving opening is formed in the right end of the driving box, and the second motor is fixedly installed on the rear end face in the driving box. The hole diameter of a machining hole needing to be machined can be automatically adjusted and compensated according to the difference of the thickness of a machined workpiece, and the compensation precision is high.

The invention discloses an ultrasonic sensor environment compensation method and system based on multi-modal feature fusion, and the method comprises the steps: starting a target ultrasonic sensor, collecting ultrasonic signal features through an ultrasonic detection unit, and synchronously collecting multi-dimensional environment features through an integrated environment sensing module, all the features are aligned and stored according to a preset timestamp. And calling a weight distribution mechanism, determining an environment feature weight benchmark in combination with the current working parameters of the sensor, performing dynamic adjustment, and fusing the weighted environment features and the ultrasonic signal features to generate a fusion feature set. And inputting the fusion feature set into a pre-training error compensation model, predicting an ultrasonic propagation feature offset and outputting a propagation speed correction parameter. And the sensor calculates a compensated measurement value according to parameters, dynamically updates a related process according to a preset period to realize continuous compensation, and synchronously updates model reference parameters to adapt to an adjustment scene during range calibration. And the high-precision detection requirement is met.

The invention relates to the technical field of three-dimensional image display, and discloses an image crosstalk compensation device and method for a backlight modulation type naked eye three-dimensional displayer, and the device comprises a depth camera, a control unit, a liquid crystal panel, a lens array, a liquid crystal light valve and a backlight source which are sequentially stacked in the light path propagation direction. The control unit is configured to: store a crosstalk model pre-established based on optical characteristics of the device and a corresponding compensation lookup table; receiving eye position information collected by a depth camera; and generating and outputting a driving signal based on the eye position information, the binocular image data to be displayed and the brightness compensation lookup table so as to synchronously control the on-off of the backlight source, the local modulation state of the liquid crystal light valve and the gray value of the display image on the liquid crystal panel. According to the invention, the non-linear reverse compensation model is established, and the lookup table and the control unit are combined to convert the non-linear reverse compensation model into high-precision compensation capable of running in real time, so that the depth sense, definition and stability of a naked-eye three-dimensional display picture are effectively improved.