430results about How to "Improve the compensation effect" patented technology

A power calculating and amplitude limitation judging portion 13 calculates the power value x of the digital quadrature baseband signal I, Q from a transmission data generator 1, and compares the power value x with a power threshold value y set by a threshold value setting portion 14 to judge whether amplitude limitation is needed or not. An amplitude maximum limiting portion 12 subjects the quadrature baseband signal from the transmission data generator 1 to the amplitude maximum value limitation based on the judgment result in the power calculating and amplitude limitation judging portion 13. Thereafter, the digital quadrature baseband signal which has been subjected to the amplitude maximum value limitation by the amplitude maximum value limiting portion 12 is subjected to the distortion compensation using complex multiplication based on the distortion compensation data by a non-linear distortion compensation calculator 2.

The invention discloses a drilling column heave compensation device of a marine floating type drilling platform. A composite hydraulic cylinder is adopted as a heave compensation hydraulic cylinder in a crown block heave compensation device; the high-pressure hydraulic oil output by a hydraulic pump flows into a rodless cavity of an inner cylinder and a rod cavity of an outer cylinder of the composite compensation hydraulic cylinder by a compensation control valve to provide controllable additional force for a piston rod of the outer cylinder; and the resultant force of the force and the hydraulic force acted by the rodless cavity of the outer cylinder of the compensation hydraulic cylinder provides support force to a crown block. The direction and magnitude of the additional force are controlled according to the platform heave motion, and the compensation effect of a heave compensation system is improved. A control unit transmits a control command to the hydraulic system according to the motion speed of the platform in the vertical direction, wherein the motion speed is obtained by detection, drives a piston of the compensation hydraulic cylinder to push the crown block to move and compensates the heave motion of the platform so that the crown block, a traveling block and a large hook are in a static state in the vertical direction relative to the well bottom in the allowable range.

The present invention is a voltage regulator circuit with enhanced frequency compensation. The voltage regulator includes an error amplifier, a dynamic bias circuit, an enhanced frequency compensation unit, a pass device and a compensation circuit. A signal from the pass device acts as an input signal of the error amplifier and is compared with another input signal, producing a differential signal. The differential signal is amplified and then provided to the dynamic circuit and the enhanced frequency compensation unit. The enhanced frequency compensation unit is provided such that a zero reference value in a left-hand plane can be generated to optimize the compensation for the voltage regulator circuit. The error amplifier includes a capacitor for compensating an output voltage of the voltage regulator circuit.

The invention provides a phase noise compensation method suitable for large line width and high order modulation CO-OFDM system. The method comprises the following steps: performing channel equalization on training symbol data of a receiving terminal after performing Kalman filter on the same in the frequency domain; setting pilot frequency subcarrier data with certain intervals for each OFDM symbol on a transmitting terminal, and performing preset CPE phase noise estimation and compensation at pilot frequency subcarriers in the frequency domain based on extended Kalman filter (EKF); and finally, converting frequency domain data subjected to CPE phase noise compensation into the time domain, and realizing blind ICI phase noise compensation by using the Avg-BL method, then performing pre- judgment, converting the frequency domain data subjected to the judgment into the time domain, applying time domain data and original time domain data of the receiving terminal to time domain unscented Kalman filter, calculating a final phase noise compensation value, and performing compensation. By adoption of the phase noise compensation method, a better phase noise equalization effect is obtained, and the spectrum utilization rate of the system is improved.

The present invention discloses one kind of heave compensation system for drill stem of marine floating drilling platform. High pressure hydraulic oil is led from the energy accumulator through a compensation control valve to the compensating hydraulic cylinder, so as to provide one additional force controlled based on the heave motion of the platform for raised compensation effect. The control unit detects the vertical motion of the platform to control the hydraulic system for compensating the heave motion of the platform by means of the steel cable or chain to make the crossbeam and rotary hook in vertically quiescent state relative to the well bottom. The present invention is superior to traditional passive heave compensation system, and has high reaction speed, high compensation precision, low power consumption and low operation cost.

The present invention provides an array substrate, a display device and a driving method thereof, relates to the technical field of display, and can improve the problem that the compensation signal isnot accurate due to the inaccuracy of the signal received on the detection IC due to the weak compensation signal in the prior art. The array substrate comprises a plurality of sub-pixels; each of the sub-pixels is correspondingly provided with a photo-sensing detecting component, the photo-sensing detecting component comprises a photosensitive element and a signal reading element, the photosensitive component is connected to a first voltage end and a second voltage end and used for detecting the luminance of the sub-pixel and transmitting an electrical signal corresponding to the luminance of the sub-pixel to an output end of the photosensitive element, the signal reading element is also is connected to the output end and a signal reading line, and used for reading an electrical signal output by the output end and transmitting the electrical signal to the signal reading line; and wherein the sub-pixels at least partially correspond to the photosensitive elements in the photo-sensingdetecting components arranged correspondingly to the sub-pixels.

The invention discloses an output current wave shape control method for a triphase Active Power Filter (APF). A T-shaped filter and a current wave shape controller are adopted to control the output current wave shape of the triphase AFT. The output filter for each phrase bridge arm of an inverter is a capacity connected to the middle point of two inductances connected with each other in series, and form a T-shaped structure, namely T-shaped filter; the calculation method for wave shape controlling is conducting Alfa, Beta, Omicron transformations to instruction current of the triphase APF, actual output current and the voltage of the power network, so as to realize decoupling of the wave shape controlling of the abc triphase output current; and respectively conducting pole assignment to the single-phrase system under decoupled Alfa, Beta, Omicron axis system, and correcting the error between the APF actual output current an the instruction current, so as to get instruction voltage of each phrase under the alfa, beta, Omicron axis system; and at last sending the instruction voltage to a space vector modulating module, so as to confirm the on-off signal of each bridge arm switch tube, thereby causing the actual output current of the PFA to accurately track the instruction current.

An integrated compensation device consists of detection control unit, thyristor switched capacitor module connected to power network and active electric power filter. It is featured as calculating out reactive volume required to be compensated onto load by said device according load current and system voltage as well as object power factor then issuing different switching commands to thyristor switched capacitor module for realizing the switching operation of compensation branch and confirming command signal of compensation current on said filter to make actual output current of said filter track with variation of command current.

The present invention discloses an electroluminescence display screen and a method and system for brightness uniformity compensation thereof. The method comprises: performing aging processing of the display screen; performing test modeling based on the corresponding relation between the aging law of an electroluminescent diode in the display screen and the aging law of a thin film transistor (TFT) in the display screen to obtain a brightness uniformity compensation model; obtaining a first compensation parameter and a second compensation parameter required for compensation of the TFT, calling a brightness uniformity compensation model according to the compensation parameters to obtain the brightness proportion of the current electroluminescent diode; and performing brightness uniformity compensation of the display screen according to the brightness proportion of the current electroluminescent diode. The method provided by the invention can improve the brightness uniformity compensation effect of the display screen and improve the brightness uniformity of the display screen.

The invention provides an AMOLED pixel driving system and an AMOLED pixel driving method. The AMOLED pixel driving system comprises a 4T1C (four thin-film transistors and one capacitor) pixel driving circuit and an initial voltage power supply module electrically connected with the pixel driving circuit. The initial voltage power supply module provides a high-level initial signal for the pixel driving circuit in the light emitting stage. The threshold voltage of a driving thin-film transistor can be compensated effectively, and the current flowing through an organic light emitting diode can be stabilized. Moreover, the leakage currents of the gate and the source of the driving thin-film transistor in the light emitting stage can be reduced, and the stability of compensation data in the light emitting stage and the threshold voltage compensation effect can be improved.

The invention discloses a repetitive-control-based method for controlling a compensation current of a DSTATCOM (Distribution Static Synchronous Compensator). The method comprises the following steps of: (1) acquiring a grid voltage, a load current and the compensation current; (2) extracting current commands from the load current; and (3) carrying out repetitive control and PI (Proportional-Integral) control according to the current commands, and then, outputting voltage commands to the DSTATCOM. According to the repetitive-control-based method for controlling the compensation current of the DSTATCOM, the no-static-error tracking of the low-order harmonics, comprising fundamental harmonics, of the DSTATCOM can be achieved, the compensation accuracy of the DSTATCOM is improved, the compensation bandwidth of the DSTATCOM is increased, and the compensation capability and accuracy of the DSTATCOM with unbalanced loads are improved, so that the DSTATCOM can have harmonic compensation and suppression capabilities, the use of passive filters at the outlet side of the DSTATCOM is reduced, the harmonic performance of the compensation current of the DSTATCOM is improved, the harmonic output is reduced, and the pollution to a power grid is reduced.

The invention discloses a pixel circuit and a driving method thereof, an organic electroluminescent display panel, and a display apparatus. The pixel circuit comprises a luminescent device, a driving control module, a reset control module, a charge control module, a writing control module and a luminescence control module. The reset control module resets a first node and the luminescent device, the charge control module charges a second node through the luminescence control module and discharges the second node through the driving control module and the reset control module, the writing control module writes data signals into the second node, and the luminescence control module controls the driving control module to drive the luminescent device to emit light. Since the charge control module discharges the second node through the driving control module and the reset control module and the discharge path of the driving control module does not go past the luminescent device, the feature and the display life of the luminescent device are not affected, it can also be ensured that threshold voltages of the driving control module are accurately written, and the compensation effect is optimized.

The invention relates to a control system of an opening-closing die motor and a push-out motor of a fully-electric injection molding machine, comprising a computer controller, a PLC (Programmable Logic Controller), an opening-closing die push-out driver, the opening-closing die motor and the push-out motor which are mutually connected. The invention also analyzes the motion characteristics and the dynamic characteristics of a toggle lever mechanism of a five-hinge die-closing double-toggle die closing mechanism object, provides a die protection implementation method of a die closing mechanismunder the driving of a fully-electric motor as well as a die closing mechanism control method and a field oriented control algorithm on the basis of a fuzzy adaptive theory from the angle of a control theory, meets the control requirements on three aspects of the die closing force, the speed, and the position, ensures the reliable closing of the molded die and realizes the opening-closing motion of the die and accurate and stably push-out of products from the die; and the designed DSP (Data Signal Processing) driver ensures that the system has stable reliability under the condition of high load and simultaneously improves the disturbance compensation.

The invention provides a large line width CO-OFDM phase noise compensation method of time-frequency domain Kalman filtering. The method comprises the following steps: firstly, performing Kalman filtering on receiving end training symbol data in the frequency domain, and performing channel equalization, then dividing each OFDM symbol into a plurality of sub-symbols, performing time domain extended Kalman filtering at a pilot frequency sequence in each sub-symbol to obtain a rough phase noise estimation value of each time domain sampling point, and compensating the rough phase noise estimation value; performing linear interpolation between the rough phase noise estimation values at the last pilot frequency sequence of the adjacent sub-symbol to obtain the rough phase noise estimation value of each time domain sampling point, compensating the rough phase noise estimation value, and performing pre- judgment after performing phase noise compensation by using the Avg-BL method; and finally converting the frequency domain data into the time domain to combine with the initial time domain data after the pre- judgment, performing extended Kalman filtering at each sampling point to calculate a precise phase noise estimation value, and compensating the precise phase noise estimation value. The large line width CO-OFDM phase noise compensation method has the advantages of better phase noise equalization effect, good compensation effect and small calculation complexity.

The invention discloses an equalizing filter with high gain and wide compensation range, which is formed by a two-stage cascade differential amplifier and a one-stage feedback differential amplifier. According to the equalizing filter with the high grain and the wide compensation range, a structure of a traditional active negative feedback equalizing filter is improved, so that the feedback quantity of negative feedback is adjustable, the variable range of high-frequency gain is improved, and the compensation ability of the equalizing filter is increased. In order to enable the feedback quantity to be adjustable, a source electrode negative feedback technology is introduced into a common feedback differential amplifier, i.e. a variable resistor and a variable capacitor which are connected in parallel are added on a feedback differential pair source electrode. Low-frequency feedback quantity and high-frequency feedback quantity can be respectively changed through controlling the magnitude of the variable resistor and that of the variable capacitor, so that low-frequency gain, high-frequency gain, and adjustable ranges thereof are controlled. In addition, the higher circuit performance can be realized through multi-stage cascade. The equalizing filter with the high grain and the wide compensation range has the advantages of large bandwidth, strong gain compensation capacity, large gain compensation range and the like.

The invention discloses a railway power supply system comprehensive electric energy quality treatment device and method thereof. A static var generator comprises a power unit and an electric reactor and is connected with a pre-charge loop; the power unit is connected in series with the electric reactor; and the pre-charge loop is connected with a power side of a power grid through an AC (alternating current) switch. A thyristor switch electric reactor comprises more than two electric reactor branches; each electric reactor branch comprises an electric reactor and an electronic switch; the electric reactor is connected in series with the electronic switch; and the electric reactor branch is connected in parallel on a load side of the power grid through the electronic switch. A control protection system controls the investment of the electric reactor branches to compensate for the reactive power and controls the static var generator to compensate for the reactive power. The device and method disclosed by the invention overcome the technical shortcomings that the cost is high by using a static var generator only and the thyristor switch electric reactor can not realize continuous compensation, and also consider the advantages of high regulation speed, wide operation range, reactive power compensation and harmonic wave treatment of the static var generator and large capacity and low cost of thyristor switch electric reactor.

The invention relates to a selection method of positions of a mura compensation data reference value. The selection method comprise steps of step 10, using a camera to shoot the original mura state of a gray scale frame of a panel; step 20, when the camera detects a mura extending in the horizontal direction and a bright and dark boundary extending in the corresponding horizontal direction, allowing the bright and dark boundary to be in a rectangular interval in the set horizontal direction, and setting the top pixel of the rectangular interval in the set horizontal direction to be the position of a mura compensation data reference value; and step 30, when the camera detects a mura extending in the vertical direction and a bright and dark boundary extending in the corresponding vertical direction, allowing the bright and dark boundary to be in a rectangular interval in the set vertical direction, and setting the top pixel of the rectangular interval in the set vertical direction to be the position of the mura compensation data reference value. According to the invention, a mura compensation effect of a bright and dark boundary position can be effectively improved.

The invention provides a pixel circuit, a driving method of the pixel circuit and a display device of the pixel circuit. The pixel circuit comprises a resetting unit, a writing-in unit, a threshold voltage locking unit, a driving electric level locking unit and a light-emitting control unit. The resetting unit can enable resetting voltage to be access to a grid electrode of a driving transistor to reset the driving transistor, the writing-in unit can write data voltage into the second end of a storage capacitor and can write reference voltage into the second pole of the driving transistor, the threshold voltage locking unit can conduct the connection between the grid electrode of the driving transistor and the first pole of the driving transistor to lock the threshold voltage of the driving transistor into the grid electrode of the driving transistor, the driving electric level locking unit can lock the second driving electric level into the second end of the storage capacitor, and the light-emitting control unit can enable the second driving electric level to be access to the second pole of the driving transistor to control the driving transistor to drive light-emitting elements to emit light after the threshold voltage is locked in the grid electrode of the driving transistor. The grid source voltage of the driving transistor can compensate the threshold voltage of the driving transistor and the second driving electric level. The pixel circuit can improve the effect of compensating the driving electric level.

The present invention provides a method and a device for mura compensation of a display panel. The method comprises the steps of: taking one pixel selected in each compensation area as one compensation pixel to measure and store compensation data corresponding to each compensation pixel, calculating the compensation data of other pixels except the compensation pixels in each compensation area according to the compensation data corresponding to each compensation pixel and a preset bicubic interpolation algorithm, and employing the bicubic interpolation algorithm to calculate the compensation data of other pixels except the compensation pixels in each compensation area. Compared to traditional bilinear interpolation, the image transition is smoother, sawtooth is reduced, the mura compensation effect is improved, and the image quality is improved.

The invention relates to a method for improving the seismic data resolution ratio. The method for improving the seismic data resolution ratio comprises the following steps that a time domain signal u (t) of an actual attenuating seismic trace is established according to input seismic data; a series of Gabor plates u (tau, t) are established according to the established time domain signal u (t) of the actual attenuating seismic trace; FFT conversion is conducted on the Gabor plates u (tau, t) at all time points tau, so that a Gabor spectrum is generated, and the stable reverse Q filtering method compared with a time varying band-pass filter F (tau, omega) is applied to the Gabor spectrum, so that a Gabor spectrum U (tau, omega) after stable reverse Q filtering is generated; Fourier inverse transformation is conducted on the Gabor spectrum U (tau, omega) after stable reverse Q filtering in the depth position time tau direction and each obtained Gabor plate u (tau, t) is reconstituted; the seismic data with the high resolution ratio processed through the stable reverse Q filtering method compared with the time varying band-pass filter. The method for improving the seismic data resolution ratio can be widely applied to processing the seismic data.

Disclosed is a distortion compensating and power amplifying apparatus including: a transistor to power amplifies an input signal; a branch circuit to branch the input signal into two signals; distortion compensation means for generating a second harmonic of a fundamental wave for one of branched signals and adding the generated second harmonic to the other branch signal from said branch circuit for input to an input terminal of said transistor; and a termination circuit connected to an output terminal of said transistor and grounding the second harmonic.

The disclosure relates to the technical field of display and particularly to an OLED pixel compensation method, an OLED pixel compensation device, and a display device. The compensation method comprises steps of: testing driving transistors of the N-th row of sub-pixels to obtain first test information; testing driving transistors of the M-th row of sub-pixels to obtain second test information; calculating a compensation parameter based on the first test information and the second test information; and compensating the N-th row of sub-pixels, the M-th row of sub-pixels and successive a rows of sub-pixels from the N-th row and the M-th row, wherein N = an + b, M = an + c, A >= 2, 0 <= b < a, 0 <= c < a, and a, b, c, n are all integers. The compensation method and device achieve real-time brightness compensation by shortening the update period of the compensation data, thereby improving a compensation effect.

This invention discloses a kind of high-efficiency compensating three-phase imbalanced load and reactive power apparatus. It concludes: three-phase current of three-phase electric system, three-phase voltage sampling circuit, power controller and different three-phase compensating elements controlled by the power controller. According to the sampling results, the power controller controls each unidirectional switch of three-phase compensating elements of different topological structure respectively. It makes them can either compensate together or compensate solely; it can either compensate reaction or balance action; it can either use for static compensating or use for dynamic compensating; it can either adjust three-phase current of adjust three-phase imbalanced voltage. It can be used for improving and replacing the reactive compensation apparatus of the three-phase-four-line mode imbalanced load electric system.

The invention provides a display brightness compensation method and device and equipment. The display brightness compensation method comprises the steps that brightness of each pixel block in a targetarea is acquired; the initial reference brightness is adjusted according to the brightness of each pixel block, and target compensation data of each pixel block are calculated according to the adjusted reference brightness and the brightness of each pixel block, wherein the target compensation data are within a predetermined compensation range; and according to the target compensation data of each pixel block, the brightness of each pixel block is compensated. According to the display brightness compensation method and device and the equipment, on the premise of ensuring compensation precision, the compensation effect of uneven brightness is improved, and the display performance of a display screen is improved.

The embodiments of the invention display a display panel and a manufacturing method thereof, a compensation apparatus, a display apparatus and a common electrode voltage compensation method. The display panel provided by one embodiment of the invention comprises at least one capacitor arranged at an area apart from an effective display area of the display panel so as to enable common electrode voltages of the display panel to maintain stable. The compensation apparatus provided by another embodiment of the invention comprises a compensation module, a comparison module and an adjustment module and can adjust common electrode compensation signals in a controllable mode.

The invention discloses an offshore wind plant reactive power optimization configuration method considering wind turbine generator reactive power regulation. The method specifically comprises the steps of selecting compensation points and compensation modes according to the capacity and the conveying distance of an offshore wind plant; establishing an offshore wind plant equivalent model, optimizing the compensation capacity and the grouping number of high-voltage shunt reactors according to reactive requirements of the offshore wind plant at different active output levels, and formulating a PDFIG-n table; according to the requirements of offshore wind plant grid connection technical specifications for voltage, optimizing the compensation capacity of an SVG device through dynamic simulation, and ensuring transient voltage stability; and according to the optimized compensation capacity, coordinating and optimizing the reactive power output of the wind turbine generator and a reactive power compensation device by taking static voltage stability and low operation cost as targets and utilizing the reactive power regulation capability of the wind turbine generator. According to the method, the static and transient voltage stability of the offshore wind power plant is considered, the reactive power regulation capability of the wind turbine generator is fully utilized, and the economyand safety of a reactive power configuration scheme are improved.

The invention discloses a novel drill stem heave compensation device for an ocean floating type drilling platform. A combined type hydraulic cylinder is adopted as a heave compensation hydraulic cylinder. The high-pressure hydraulic oil outputted from a hydraulic pump is led into a non-rod cavity of the inner casing of the combined type hydraulic cylinder through a compensation control valve, and therefore a controllable subsidiary force is provided for an outer casing piston rod. The controllable subsidiary force and the pressure of an accumulator acted by a non-rod cavity of the outer casing of the compensation hydraulic cylinder jointly form a support force for a hook load. The subsidiary force is controlled according to the heave movement of the platform, thereby improving the heave compensation effect of a conventional driven type system. According to the detected movement speed of the platform in the vertical direction, a control unit gives a control command to the hydraulic system so as to drive a piston of the compensation hydraulic cylinder to drive a sprocket to move, thereby compensating the heave movement of the platform under a chain or the chain action, and consequently enabling a cross beam and the hook to be in a static status relative to a hole bottom in the vertical direction within an allowable range. The drill stem heave compensation device can effectively control the consumption of the energy, reduce the operating cost of the system, and improve the compensation precision.

The invention discloses a method of nonlinear friction compensation for a single-motor servo system based on a particle swarm algorithm. The method comprises the following processes: rotational speedand friction torque data of the single-motor servo system are acquired in an offline mode; based on the rotational speed and friction torque data acquired in an offline mode, the particle swarm algorithm is used for parameter identification on a Stribeck friction model, and the identified Stribeck friction model is acquired; the single-motor servo system runs in an online mode, the friction torqueis acquired in real time according to the identified Stribeck friction model, the friction torque is compensated to a current signal through a feedforward coefficient, a feedforward compensation structure based on the Stribeck friction model is constructed, and by using the structure, nonlinear friction compensation for the single-motor servo system can be realized. The method improves the tracking accuracy of the motor servo system when tracking a sinusoidal signal, and can effectively solve the problem of static tracking errors in the system due to friction nonlinearity. The overall methodis simple and convenient to apply.

The invention discloses a feedforward decoupling control method based on a three-phase two-arm tri-level active power quality compensator. For the purpose of realizing reactive compensation, negative sequence compensation and harmonic compensation, one two-input and two-output coupling system is decoupled into two independent single-input single-output systems, thus quickly tracking current and improving reliability of the system; and a corresponding PWM (pulse width modulation) method is adopted to drive a switching tube to acquire an expected current. The feedforward decoupling deadbeat control method based on the three-phase two-arm tri-level active power quality compensator can be used to realize complete compensation and inhibition of the negative sequence and harmonic waves of the systems.