65results about How to "Improve the compensation effect" patented technology

The invention relates to the technical field of screen printing, in particular to a PCB screen printing ink layer thickness uniformity control method, system and device and a medium. The method comprises the following steps: firstly, collecting ink layer actual thickness data and screen tension data of a PCB screen printing area, then analyzing the relevance between the two data to obtain an ink layer uniformity analysis result, further determining proper compensation parameters through process compensation analysis, finally dynamically adjusting screen printing pressure, scraper angle and printing speed, bringing screen tension into a control system, and finally, controlling the screen printing uniformity. Compared with the prior art, the method has the advantages that the adaptability and the reliability are higher, and the product yield can be improved.

The invention discloses a five-axis numerical control machine tool thermal error compensation method considering tool wear. The method comprises the steps that temperature data of all monitoring points are collected, position changes between a tool cutting point and a workpiece are measured to obtain thermal error data, acceleration signals are collected, and a tool wear value is measured; (2) carrying out standardization processing on the collected temperature data, and screening out temperature sensitive characteristics highly related to thermal errors; (3) establishing a nonlinear mapping relation between the temperature sensitive characteristics and the thermal error by using an SVM (Support Vector Machine) model; (4) preprocessing the acceleration signal, and training a tool wear monitoring model; (5) introducing a Sigmoid correction function on the basis of the SVM model to obtain a thermal error compensation model; (6) optimizing parameters in the SVM model and the Sigmoid correction function by adopting a Bayesian optimization algorithm; and performing real-time compensation on the thermal error of the machine tool through the optimized thermal error compensation model. According to the invention, the requirement of high-precision thermal error compensation in a long-time processing environment can be met.

The invention discloses a fixed-wing unmanned aerial vehicle predetermined time cooperative path following formation control method, and relates to an unmanned aerial vehicle technology. A multi-unmanned aerial vehicle cooperative path following control strategy based on preset time stability, neural network adaptive control and preset performance control is provided; according to the method, the multiple fixed-wing unmanned aerial vehicles can realize preset time convergence of path following errors and preset time preset performance convergence of control signal tracking errors under the conditions of external disturbance and actuator faults, so that a high-precision and quick-response cooperative path following formation control task is completed; and meanwhile, the control precision and robustness are improved.

The invention discloses a brightness compensation method and device of a display panel. The display panel at least comprises a first display area and a second display area, and the brightness compensation method of the display panel comprises the following steps: when the first display area is refreshed at a first frequency and the second display area is refreshed at a second frequency, determining a first compensation value of the second display area according to a gray-scale value of the second display area; determining a correction coefficient according to the display brightness value and the gray-scale value of the second display area; correcting the first compensation value according to the correction coefficient; wherein the first frequency is greater than the second frequency. After the first compensation value corresponding to the display area with the low refresh frequency is determined, the first compensation value is corrected again according to the correction coefficient, so that the final compensation value of the display area is more accurate, the brightness compensation of the second display area with the low refresh frequency is more accurate, the brightness compensation effect is improved, and the user experience is improved. The problem that display of a display panel is dark or bright in a part of a display area when the display panel is refreshed in a partition mode is solved.

The invention discloses a laser engraving machine temperature compensation control system based on multi-source temperature data fusion, and the system comprises a temperature collection module which comprises a plurality of temperature sensors disposed at key parts of a laser engraving machine and is used for obtaining the overall temperature field distribution data; the algorithm module comprises an improved Kalman filtering algorithm used for eliminating temperature data noise; the multi-point weighted fusion algorithm is used for carrying out spatial distribution fusion calculation on the multi-point temperature data; the thermal deformation prediction algorithm integrates heat conduction, natural convection and radiation heat exchange models and is used for predicting the temperature change of the whole system; a self-adaptive compensation algorithm is adopted, and PID parameters are dynamically adjusted according to real-time error feedback; and the compensation execution module is used for performing real-time position compensation on the laser engraving machine according to the compensation amount output by the algorithm module.

The invention discloses a four-rotor aircraft attitude repeated learning control method based on a fixed time disturbance observer, and the method comprises the steps: building a kinetic model of a four-rotor aircraft system, and initializing the state and control parameters of the system; designing a fixed time disturbance observer; designing a fixed time sliding mode variable; designing a full-saturation repeated learning law; and designing a repetitive learning controller based on the fixed time disturbance observer, the fixed time sliding mode variable and the full-saturation repetitive learning law. According to the method, the influence of the system uncertainty on the control precision of the four-rotor aircraft can be effectively inhibited, the influence of the initial state on the system uncertainty estimation and compensation rapidity is reduced, and the accurate tracking of the four-rotor aircraft on the periodic expected attitude angle within the fixed time is realized.

The invention provides a display substrate and a display device. The display substrate comprises a substrate body, a first transistor, a second transistor, a third transistor, a first shading layer and a second shading layer. According to the embodiment of the invention, the first transistor for detecting the ambient light intensity, the second transistor for detecting the backlight intensity and the third transistor for detecting the temperature are arranged, the first light shielding layer is used for shielding the lower parts of the first transistor and the third transistor, and the second light shielding layer is used for shielding the upper parts of the second transistor and the third transistor; therefore, the working environment parameters of the display panel can be effectively and accurately collected, and the compensation effect on the display effect is improved.

The invention provides a reactive automatic compensation device applied to a medium-voltage distribution line. The reactive automatic compensation device comprises a line compensation control unit and a line compensation unit, the uplink of the line compensation control unit is connected with the medium-voltage distribution line, and the downlink is connected with the line compensation unit; the line compensation control unit is used for acquiring the compensation capacitor capacity of the line compensation unit and calculating the reactive power of the line, and when the reactive power is greater than the compensation capacitor capacity, the capacitor of the line compensation unit is put into use by sending a closing command to the switch driving terminal in the line compensation unit with the least switch action times; when the reactive power of the line is less than zero, an opening command is sent to the switch driving terminal of the line compensation unit with the most switch action times, and the capacitor of the line compensation unit is cut off; and calculating the opening and closing time of each phase of switch at the current temperature through parabola interpolation. According to the invention, the reactive compensation capacity of the medium-voltage distribution line can be freely expanded without limitation, and the compensation effect is greatly improved.

A broadband voltage transformer error compensation method is proposed. First, a broadband test platform is constructed using a signal generator, power amplifier, standard voltage transformer, and high-bandwidth data acquisition system. The ratio and phase errors of the transformer at multiple frequency points are acquired through primary-side excitation and secondary-side synchronous acquisition. Based on the slope, first derivative, and second derivative characteristics of the error curve, the entire frequency band is adaptively divided into segments. Within each segment, multiple candidate models are fitted using a polynomial or exponential-linear combination model. The optimal model is selected based on the coefficient of determination, mean absolute error, and root mean square error. Ratio and phase error compensators are constructed based on the fitting functions of each segment, and error compensation is achieved using a feedforward approach. This method can significantly reduce amplitude and phase errors over a wide frequency range, improving the dynamic measurement accuracy of the voltage transformer.

The invention provides a straight pipe pressure balance expansion joint for space limitation, which comprises a working wave assembly, a first balance wave assembly, a second balance wave assembly and a pull rod assembly, one end of the working wave assembly is connected with an inlet pipe, the other end of the working wave assembly is connected with one end of the first balance wave assembly through an outlet pipe, and the other end of the second balance wave assembly is connected with the pull rod assembly. The other end of the first balance wave assembly is connected with the pull rod assembly, the second balance wave assembly is sleeved with the first balance wave assembly, one end of the second balance wave assembly is connected with the outlet pipe, the other end of the second balance wave assembly is connected with the third connecting pipe, and one end of the pull rod assembly is connected to the inlet pipe. The other end of the pull rod assembly is connected to the third connecting pipe, a through hole is formed in the outlet pipe, and the through hole enables a working medium to enter a cavity formed by the first balance wave assembly and the second balance wave assembly. According to the expansion joint, large axial displacement and transverse displacement can be compensated, and the structure is more compact.

The invention relates to the technical field of AUVs (Autonomous Underwater Vehicles), and particularly discloses a multi-degree-of-freedom motion compensation system and method for AUV retraction operation, the compensation system comprises a main body, the main body comprises an XY-direction compensation mechanism and a Z-direction compensation mechanism, the XY-direction compensation mechanism comprises a plurality of propellers, the Z-direction compensation mechanism comprises a hydraulic cylinder, a composite energy accumulator and a gas cylinder, the hydraulic cylinder comprises a first piston part, and the composite energy accumulator comprises a second piston part; an inner cavity of the hydraulic cylinder is divided into a rodless cavity and a rod cavity through a first piston piece, the composite energy accumulator comprises a cavity body, a fixed partition plate and a second piston piece are arranged in the cavity body, and the second piston piece comprises a first piston and a second piston which are connected with each other. The first piston, the fixed partition plate and the second piston divide the cavity into a connecting oil cavity, a first compensation oil cavity, a second compensation oil cavity and a compensation air cavity which are arranged in sequence, and communicating channels are arranged between the connecting oil cavity and the rod cavity and between the compensation air cavity and the air cylinder. A hydraulic control assembly capable of conducting bidirectional reciprocating conveying on hydraulic oil in the first compensation oil cavity and the second compensation oil cavity so as to change the oil amount in the first compensation oil cavity and the second compensation oil cavity is arranged between the first compensation oil cavity and the second compensation oil cavity. The compensation system is simple in overall structure, high in flexibility, good in compensation effect and capable of effectively ensuring the stability and safety of AUV retracting and releasing operation under complex sea conditions.

The present application relates to the field of image processing technology, and specifically to a method and system for enhancing the display effect of holographic photography, the method comprising: acquiring a digital holographic image; obtaining the holographic image focusing degree of each pixel point; then obtaining the holographic background pixel point and the holographic focus pixel point; obtaining the difference between the low pixel interval and the high pixel interval; calculating the holographic low pixel compensation parameter and the holographic high pixel compensation parameter of the digital holographic standard image; then obtaining the target amplitude balanced image; optimizing the iterative process of the holographic background pixel point and the holographic focus pixel point based on the target amplitude balanced image, and obtaining a pure phase hologram. The present application enhances the display effect of the holographic image.

The present invention provides a pixel driving circuit and a display panel, wherein the pixel driving circuit comprises a driving transistor, wherein the driving transistor comprises an output terminal, an input terminal, and a control terminal, wherein the driving transistor is configured to generate a driving current in a light-emitting stage to drive the light-emitting device through the output terminal electrically connected to the light-emitting device; a compensation module is configured to detect and compensate for a threshold voltage of the driving transistor in the compensation stage; and an over-detection module is configured to adjust the threshold voltage detected and compensated by the compensation module in an over-detection stage after the compensation stage, wherein the threshold voltage detected and compensated by the compensation module is adjusted in the over-detection stage through the over-detection module, so that the threshold voltage detected by the compensation module is greater than the actual threshold voltage of the driving transistor, thereby compensating for the threshold voltage information lost due to parasitic capacitance and the like during compensation, thereby improving the compensation capability of the internal compensation circuit.

The invention discloses a synthetic aperture radar imaging method and device for a spiral track gliding aircraft. The method comprises the following steps: sequentially carrying out time domain and frequency domain compensation processing on an echo signal through a time domain compensation function and a frequency domain compensation function to obtain a two-dimensional frequency domain signal; wherein the time domain compensation function and the frequency domain compensation function are constructed according to the relation between the high-precision instantaneous slope distance of any point in the imaging scene and the instantaneous slope distance of the reference point, and the instantaneous slope distance is determined based on a spiral trajectory geometric model with fast acceleration and speed change; and performing non-uniform fast Fourier transform on the two-dimensional frequency domain signal to obtain a transformed two-dimensional frequency domain signal. The imaging precision can be improved.

A composite material transmission shaft with a diaphragm disc belongs to the technical field of mechanical power transmission. The present invention solves the problems of the existing composite material transmission shaft having a complex structure, a large volume and a high preparation cost. It comprises a first shaft section, a second shaft section, a diaphragm disc and two flanges which are coaxially arranged and formed by an integrated laying of carbon fiber epoxy resin-based composite materials, wherein the diaphragm disc is located between the first shaft section and the second shaft section, and the two flanges are correspondingly located at one end of the two shaft sections away from the diaphragm disc, and the diaphragm disc comprises a diaphragm disc main body and chamfered sections located at both ends of the diaphragm disc main body, and the axial section of the diaphragm disc main body is a rectangular structure, and the laying method of the chamfered section is the same as that of the first shaft section and the second shaft section. The various parts of the structure are formed by integrated laying, and do not need to be formed and assembled separately. The mold preparation is simple, the overall processability is good, the overall axial and bending compensation capabilities of the transmission shaft are strong, and the compensation efficiency is high.

The invention discloses a pixel compensation method, and the method comprises the steps: determining a pixel which needs to be subjected to pixel compensation in a display screen, and judging whether the pixel is displayed to be white or not; if the pixel is not displayed to be white, performing pixel compensation on the pixel according to a preset first compensation rule; and if the pixel is displayed to be white, performing pixel compensation on the pixel according to a preset second compensation rule. The invention further discloses a system applying the method, electronic equipment and a computer readable storage medium.

The invention discloses a three-axis position-adjustable landing gear uplock pin fixing base device. The upper lock pin is rigidly connected with the upper lock pin seat, the mounting ring is rigidly connected with the upper lock pin seat pressing plate, and the tooth-shaped plate is arranged between the upper lock pin seat platform and the upper lock pin seat pressing plate; by adjusting the relative meshing position of the tooth-shaped plate and the upper lock pin seat pressing plate, the relative position of the upper lock pin seat and the mounting ring in the X direction is changed; the relative positions of the upper lock pin seat and the mounting ring in the Y direction are changed by adjusting the number of the first adjusting gaskets clamped between the upper lock pin seat and the mounting ring; the relative positions of the upper lock pin seat and the mounting ring in the Y direction are changed by adjusting the number of the second adjusting gaskets clamped between the upper lock pin seat and the mounting ring. Therefore, the locking reliability of the undercarriage is improved, and the defects that the position of a traditional undercarriage uplock pin fixing and mounting device can only be adjusted in two directions, and the position of the uplock pin of the undercarriage cannot be accurately adjusted are overcome.

The invention belongs to the technical field of motion control of unmanned vehicles, and particularly relates to a robust tracking control method for a differential unmanned vehicle under actuator damage and mass change, which comprises the following steps of: 1, establishing a kinematics model and a dynamics model for the differential unmanned vehicle, qualitatively analyzing the influence of the efficiency damage and the physical quality damage of the actuator in the kinematic model and the dynamical model; 2, designing control inputs with estimated values for the left actuator and the right actuator; step 3, designing a segmented updating law for the estimator, and estimating uncertainty introduced by efficiency damage and physical quality damage of the actuator; and 4, designing a flag bit switching mechanism based on event triggering, and switching the estimator working interval. According to the method, the differential unmanned vehicle can realize stable trajectory tracking under certain actuator efficiency damage and physical quality damage.

Provided are a signal frequency offset compensation method, network device and apparatus, the method being applied to the network device, the method comprising: acquiring a reference frequency offset value of a first RRU, the first RRU being an RRU to which a target terminal belongs currently in a plurality of RRUs; determining frequency offset index data of the target terminal, the frequency offset index data comprising a moving direction of the target terminal relative to the plurality of RRUs, or a pilot signal frequency offset value of the first RRU; determining a target frequency offset value of the first RRU according to the frequency offset index data, or determining the target frequency offset value of the first RRU according to a reference frequency offset value of the first RRU and the frequency offset index data; and according to the target frequency offset value of the first RRU, performing frequency offset compensation processing on an uplink signal of the target terminal received based on the first RRU. According to the scheme provided by the invention, the frequency offset measurement in a high-speed mobile scene can be realized without increasing the overhead of a pilot signal.

The present invention belongs to the technical field of pipeline compensators, and particularly relates to an anti-settling and anti-seismic corrugated compensator and a processing technology thereof; wherein the compensator comprises a middle pipe; a bellows, wherein two bellows are respectively arranged at the two ends of the middle pipe; an end pipe, wherein an end pipe is respectively arranged on the outside of each bellows; a ring plate, wherein a ring plate surrounding the outer wall of the end pipe is formed on each end pipe; a small tie rod, wherein a plurality of support ears evenly distributed along the circumference are arranged at a position of the middle pipe close to the ring plate, and a small tie rod is arranged between the support ears and the ring plate; a retaining frame, wherein a plurality of retaining frames abutting against the bellows are arranged on each small tie rod; the bellows compensator performs two-stage compensation through the bellows on both sides of the middle pipe, thereby improving the compensation effect of the bellows compensator.

The invention discloses a series filter voltage instantaneous drop detection method. The method specifically comprises the following steps: (1) obtaining a distortion voltage value of a three-phase voltage based on a voltage compensation instruction of an instantaneous reactive power dq0 method; and (2) taking the group of distorted voltage values as input values to enter a PI controller, performing PI parameter optimization by the PI controller based on an improved immune genetic algorithm, and performing detection and voltage compensation by driving an inverter bridge after a PWM signal is generated. The method has the advantages that decoupling control is conducted on the cross coupling amount between the dq axis of the series filter, the control performance is improved, the improved immune genetic algorithm is adopted to optimize the controller parameters, the problems of blindness and randomness of searching of a traditional genetic algorithm are solved, meanwhile, the PI controller parameter optimization speed is high in response, robustness is high, and the method is suitable for large-scale popularization and application. The problem that controller parameters are difficult to adapt to changing environments is solved, and the voltage detection precision and compensation performance of the series filter are improved.

The application relates to the technical field of artificial intelligence, and discloses a large model construction method, device, equipment and medium, the method comprising the following steps: performing block processing on a Transformer weight matrix of a target model to form a plurality of sub-matrices; performing low-rank approximation on each sub-matrix through two-dimensional Kronecker decomposition to obtain the Kronecker product of two small matrices corresponding to each sub-matrix; freezing the parameters of all the small matrices, using LoRA to obtain additional parameters corresponding to all the small matrices to obtain a two-dimensional Kronecker-LoRA compression model; taking the target model as a teacher model, and using a data set to train the two-dimensional Kronecker-LoRA compression model to obtain a large model. The method can reduce the parameter size and resource demand of an existing large model, form a suitable large model, effectively reduce performance loss, achieve a balance between high compression rate and high precision, adapt the dynamic reasoning and image processing process depth, and facilitate wide deployment on edge devices.

The invention discloses a high-temperature ablation radome electrical performance compensation method based on array element phase adjustment, and the method comprises the steps: reconstructing a part of the radome, the temperature of which exceeds the ablation temperature, into an air cover when a finite element model of the high-temperature ablation radome is established based on the temperature distribution of the radome in a working environment and the data of the material attribute changing along with the temperature; therefore, the finite element model of the high-temperature ablation antenna housing is obtained. Full-wave calculation is carried out by using COMLOL to obtain the electrical performance of the array antenna loaded with the high-temperature ablation radome, and the optimal phase distribution of the array antenna in the radome is iteratively solved based on a particle swarm optimization algorithm, so that the influence of high-temperature ablation on the electrical performance of the radome is compensated. The influence of high-temperature ablation on the electrical performance of the antenna housing can be considered while the compensation precision is ensured, and the method has relatively high compensation effect and precision and is wide in applicability.

The present invention discloses a flexible capacitor switching current limiter, which belongs to the technical field of reactive power compensation equipment. It includes power capacitors, NTC thermistors, inductors, DC fans, and bypass diodes; there are three groups of power capacitors, and the A, B, and C phases of the three-phase power supply are respectively connected to a corresponding group of power capacitors through a group of NTC thermistors, and the other ends of the three groups of power capacitors are connected together; a group of DC fans is connected between each group of NTC thermistors and the corresponding group of power capacitors, and a group of inductors are respectively connected in series at the other end of each group of DC fans, and the other ends of the three groups of inductors are connected together, and a group of bypass diodes are respectively connected in parallel with reverse polarity at both ends of each group of DC fans; the air outlet direction of each group of DC fans points to the corresponding NTC thermistor. It has the characteristics of low cost, good inrush current suppression ability, and fast recovery time.

The invention relates to the technical field of salt spray tests, in particular to a spraying device for a salt spray test, which comprises a salt water tank, a water control float valve, a tank cover, a spray tower, a glass spray head, a filter, a conical disperser, a support rod, a floating plate and a water inlet float valve, the floating plate is connected to the lower portion of the supporting rod and located in the saline water tank, the water inlet floating valve is installed on the inner wall of the saline water tank and located above the water control floating valve, and a pressure discharge cavity is formed in the saline water tank and located under the floating plate; the height of the conical disperser is controlled by using the salt water liquid level in the salt water tank, and the conical disperser is used for collecting the settled salt water to reduce the residual amount of the salt water in the salt water tank, so that the spraying amount at the initial stage of the salt spray test is accurately compensated, and the salt water discharge amount of the salt water tank at the last stage of the test is increased, thereby ensuring the test accuracy and improving the test efficiency. And the test cost is reduced.

The embodiments of the present application relate to the field of chip design technology, and more specifically, to a signal equalization circuit, an interface, a system on chip, and a server, which are intended to achieve high-speed signal transmission while eliminating interference between signals. The circuit includes: a master / slave processing unit circuit, a coefficient weighting unit circuit, and a polling unit circuit; the master / slave processing unit circuit is used to receive an input signal, split the input signal into four sub-signals, and output the four sub-signals to the coefficient weighting unit circuit; the coefficient weighting unit circuit is used to receive the four sub-signals, perform weighted processing on the four sub-signals, and obtain an output signal; the polling unit circuit is used to control the signal transmission between the master / slave processing unit circuit and the coefficient weighting unit circuit.

The embodiment of the present invention discloses a displacement compensation device for resisting earthquakes, which includes a first bellows, a second bellows and a support member, wherein one end of the support member is connected to the first bellows, and the other end of the support member is connected to the second bellows, so that the first bellows and the second bellows are deformed respectively when subjected to earthquake loads, and are used to compensate for lateral displacement, which is a displacement in a direction perpendicular to the axes of the first bellows and the second bellows. This displacement compensation device for resisting earthquakes helps to compensate for the displacement difference between the equipment support in the reactor and the connecting pipe of the pressure vessel under earthquakes, and can also compensate for the thermal displacement difference between the equipment support in the reactor and the connecting pipe of the pressure vessel, thereby improving the compensation capacity in a limited space.

The invention discloses a high-precision occlusion target identification method based on data enhancement, and mainly solves the problem of low occlusion target identification precision in the prior art. The method comprises the steps of performing adversarial training on an original image data set subjected to standardization preprocessing through a multi-scale discriminator, and constructing an enhanced training data set; designing a multi-scale feature extraction layer, a bidirectional feature pyramid fusion layer and a prediction output layer to realize multi-level integration of shielding features; a composite loss function and a progressive multi-scale training strategy are adopted to collaboratively optimize the network, and the robustness of the model to a shielding target is improved in stages; and a high-precision detection result is output through three-stage filtering. The target identification accuracy under the shielding scene is obviously improved, and the method is suitable for the fields of automatic driving, security and protection monitoring and the like.

The application provides a high-precision laser position detection dynamic compensation method and system, and relates to the technical field of visual detection.The method part comprises the following steps: setting a fixed-length time window, collecting vibration interference related characteristic data of the equipment in each time window; preprocessing the collected vibration interference related characteristic data, and calculating and obtaining a vibration interference intensity index; constructing a light spot three-dimensional coordinate data set and a feature mark three-dimensional coordinate data set; constructing a conversion function, calculating a deviation index in the fixed time window; setting a vibration interference intensity threshold and a deviation threshold, and making a decision judgment on the compensation mode.The application can not only detect the position deviation size between the light spot and the target, but also further analyze whether the deviation is caused by external vibration interference or other non-vibration reasons, so that blind compensation or misjudgment is avoided, the deviation source can be distinguished, the compensation effect is improved, and misoperation is reduced.

The present application relates to three coordinate measuring machine error compensation field, especially in kind based on nonlinear interpolation algorithm three coordinate measuring machine positioning error compensation method. Including in the verification direction according to the preset rule creates multiple verification points;According to the preset scheme, the three coordinate measuring machine is moved to each verification point in turn, and the positioning error value at each verification point is measured by using laser interferometer;The obtained each positioning error value is stored in the error table file;The error space is divided into several error data units;The coordinate value of the actual measurement point is obtained, and the vertex of the error compensation data unit containing the actual measurement point is taken out from the error table file;The positioning error value of the actual measurement point is calculated by nonlinear interpolation algorithm, the calculated positioning error value is added to the coordinate value of the actual measurement point, and the compensated coordinate value of the actual measurement point is obtained, which aims at solving the problems of poor positioning error compensation effect and low error compensation efficiency of three coordinate measuring machine.