88results about How to "High compensation accuracy" patented technology

The invention relates to the technical field of numerical control machine tools, and discloses a five-axis high-precision numerical control machine tool control method, device and equipment and a storage medium, and the method comprises the steps: collecting temperature data and displacement data of a five-axis high-precision numerical control machine tool, and carrying out state space modeling to obtain a machine tool motion state model; stress data and thermal error influence factors of the feed shaft are calculated; feeding shaft stress data and the thermal error influence factors are input into the compensation model, real-time compensation parameters are calculated, compensation control is conducted on the machine tool feeding shaft, and a compensation control result is obtained; according to the compensation control result, an initial machining track optimization model is constructed, and optimized machining parameters are generated; performing segmented machining control based on the optimized machining parameters to obtain real-time machining data; the initial machining track optimization model is optimized based on the real-time machining data, a target machining track optimization model is obtained, and the dynamic response performance and the control precision of the five-axis high-precision numerical control machine tool are improved through the method.

The invention relates to the technical field of adaptive filtering, and discloses a deviation compensation constraint adaptive filtering method and system based on error nonlinearity, and the method comprises the steps: constructing an adaptive weight vector and a noise-containing input signal vector according to an adaptive weight and a noise-containing voice signal sampling value when the weight of an adaptive filter is subjected to linear constraint; after the inner product generates an output signal, an estimation error signal is generated, and an error square median is calculated; calculating an error signal variance estimated value and a self-adaptive weight vector power estimated value according to the error square median and the self-adaptive weight vector, and then calculating an input noise variance estimated value; calculating a deviation compensation item according to the adaptive weight vector and the input noise variance estimation value, and updating the adaptive weight vector with the noise-containing input signal vector and the estimation error signal; and calculating the inner product of the updated adaptive weight vector influenced by the low-efficiency input noise and the noise-containing input signal vector to obtain an output signal subjected to input noise deviation compensation.

The invention discloses a digital closed-loop self-calibration compensation circuit for a magnetic sensor, and the circuit comprises a reference magnetic field generation module which is used for generating a reference magnetic field through a metal coil, and the reference magnetic field is not affected by temperature and stress, and serves as a standard for calibrating a Hall sensitivity self-calibration loop; the Hall sensitivity self-calibration loop is used for adjusting the bias voltage of the magnetic sensor in real time according to the magnitude change of the output voltage of the reference magnetic field acting on the magnetic sensor so as to adjust the sensitivity of the magnetic sensor; and demodulating the output signal of the reference magnetic field acting on the magnetic sensor from all the output signals of the magnetic sensor through a demodulation extraction circuit. According to the invention, higher calibration precision can be realized, and temperature and stress calibration can be realized at the same time.

The invention relates to a gyroscope-oriented temperature compensation method, in particular to an MEMS gyroscope-oriented temperature compensation method, which comprises the following steps: S1, after specific noise is added, decomposing an output signal of a gyroscope into a series of intrinsic mode functions (IMF); s2, dividing the decomposed intrinsic mode function IMF into a noise segment, a mixed segment and a feature segment by using a sample entropy SE; s3, de-noising processing is carried out on the noise section by using long-window time-frequency peak filtering TFPF, and useful signals are reserved while de-noising is carried out on the mixed section by using short-window time-frequency peak filtering TFPF; s4, using an extreme learning machine ELM optimized by a non-dominated sorting genetic algorithm NSGA II to perform temperature compensation on the feature segment containing the temperature drift term; and S5, combining the de-noised noise section, the de-noised mixed section and the compensated feature section, and reconstructing a final gyroscope output signal. According to the temperature compensation method for the gyroscope, interference of noise can be well reduced, and the temperature compensation effect of the gyroscope is greatly improved.

The invention provides a compensation control method and device for sea waves, electronic equipment and a storage medium, and relates to the technical field of artificial intelligence. According to the compensation control method for the sea waves, the expansion amount, the rotation angle, the pitching angle and the displacement amount of each driving cylinder are restrained through position data and posture data; therefore, precise control over the telescopic amount, the rotation angle, the pitching angle and the displacement amount of each driving cylinder is achieved. The method comprises the following steps: acquiring position data and attitude data of a ship body where a hybrid embarkation mechanism is located, and performing motion distribution on the expansion amount of each driving cylinder of a six-degree-of-freedom parallel mechanism on the hybrid embarkation mechanism and the rotation angle, the pitching angle and the displacement amount of a three-degree-of-freedom series gangway ladder, so that the hybrid embarkation mechanism is controlled in a data driving mode; the compensation precision of the sea wave compensation system of the series-parallel connection embarkation mechanism is improved, and the sea wave compensation system has high adaptability and can be applied to various series-parallel connection mechanisms of different types.

The invention provides a trestle active wave compensation method based on multi-sensor fusion positioning, and relates to the technical field of wave compensation of maritime work equipment, and the method specifically comprises the following steps: S1, collecting ship data of a laser radar, an inertial sensor I MU and a GPS positioning system, processing the ship data through improved Kalman filtering, and achieving marine precise positioning of a ship; s2, establishing a coordinate system, taking a ship as an initial state when the ship is lapped to a wind power tower at the tail end of a static underwater trestle, and establishing a rectangular coordinate system O by taking the rotation center of the ship as an original point; s3, according to the swaying, surging, yawing, rolling, pitching and heaving information, obtained by an attitude sensor MRU, of the ship at the instantaneous moment, the target position quantity of each joint of the trestle is calculated through motion attitude inverse solution; and S4, each joint is controlled to stably move to a target position, and wave compensation is completed. According to the invention, by designing the Kalman filtering system for multi-sensor fusion positioning, the position of the ship can be positioned more accurately, and the active wave compensation precision of the trestle can be improved.

The invention discloses an image brightness correction method, an image brightness correction device and a storage medium, which are used for reducing easy loss of transition details in a correction process. Performing color space conversion on the backlight acquisition image to generate an L-channel image; carrying out distribution sorting on the brightness data and screening out the brightness data with a preset screening-out proportion at the head end and the tail end; calculating a channel image brightness mean value and a fitting brightness value in the remaining L channel images; performing image segmentation on the L-channel image by taking the fitting brightness value as an initial segmentation point to generate a backlight target image and a background image; calculating a self-adaptive scale value factor, and calculating a correction brightness mean value; calculating a statistical distribution function of the backlight target image and the background image; calculating a mapping function of the backlight target object and the background object; mapping and merging the background image and the backlight target image to generate an initial brightness correction image; and performing color space inverse conversion on the initial brightness correction image to generate a target brightness correction image.

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 utility model discloses a deflection compensation device for a polygonal flexible bending center. The deflection compensation device comprises a plurality of groups of deflection compensation mechanisms which are arranged in parallel, each group of deflection compensation mechanism comprises a bearing beam, a tension bar and a tension bar telescopic driving device; the bearing beam is arranged between two bearing side plates of the rack; the tension bar is horizontally arranged, the two ends of the tension bar are directly or indirectly connected with the bearing beam and the upper panel of the rack respectively, and the tension bar can axially stretch out and draw back; and the tension bar telescopic driving device is used for driving the axial telescopic motion of the tension bar. According to the utility model, the horizontal load generated by bending can be directly balanced, and the bending force is balanced by using the compensation force. In addition, the device is simple in structure, low in cost, safe, reliable, convenient to adjust and obvious in effect. Furthermore, according to the requirement of an actual use scene, real-time dynamic adjustment can be realized, and a manual adjustment mode with lower cost can also be adopted. Due to the action of deflection compensation, the material cost can be reduced, and the cost is reduced.

The invention discloses a display unevenness compensation method of a display panel, the display panel and a display device. The display unevenness compensation method comprises the steps of obtaining a display unevenness compensation value of a to-be-displayed picture of a display panel; according to the display non-uniform compensation value, gray scale characteristic parameters are determined; searching a comparison table of the gray scale characteristic parameters and gain parameters according to the gray scale characteristic parameters, and determining gain parameter values corresponding to the gray scale characteristic parameters; according to the display non-uniformity compensation value and the gain parameter value, performing display non-uniformity compensation on a display picture of the display panel; wherein the gray scale characteristic parameter and gain parameter comparison table is pre-stored in the display panel. According to the invention, the gray scale characteristic parameters are calculated by designing a display unevenness compensation value calculation method, the gray scale characteristic parameters are used for measuring the Mura degrees of different display panels in the same batch, and the display panels are compensated by using the corresponding gain parameters according to the different Mura degrees, so that the Demura compensation precision is improved, and the display quality of the display panels is improved.

According to the carrier motion excitation micro inertial navigation error parameter identification and prediction method provided by the invention, micro inertial navigation use data and calibration data are effectively combined, device errors are preferentially compensated according to a use environment and a motion condition, historical data are fully utilized, the micro inertial navigation key error parameter compensation precision is improved, and the micro inertial navigation performance is further improved; meanwhile, the influence of motion excitation on error parameter compensation precision is also introduced, so that the calibration result is prevented from being polluted by data which does not excite errors. Finally, the learning and prediction method for the micro inertial navigation error parameter variation trend can reduce device errors caused by the increase of the service life, and prolongs the service life of micro inertial navigation.

The invention belongs to the technical field of urbanization cable distributed capacitance compensation, and discloses a multi-winding grading reactor applied to urbanization cable distributed capacitance compensation, which comprises a multi-winding transformer, a passive series / parallel coarse tuning reactor shunt, an active inversion fine tuning reactor shunt and a controller, the multi-winding transformer comprises a primary winding and N secondary windings, and N is greater than or equal to 3; two ends of the primary winding are connected in series in a power grid cable line; the M secondary windings and the corresponding M bidirectional thyristors are connected in series or / and in parallel to form a passive series / parallel coarse tuning reactor shunt, and M is less than N; the active inversion fine adjustment reactor shunt comprises a single-phase full-bridge conversion circuit, and the alternating current side of the single-phase full-bridge conversion circuit is connected with any one of the residual N-M secondary windings in the multi-winding transformer; and the controller controls the coarse adjustment and fine adjustment reactor shunt to perform coarse adjustment and fine adjustment on the system output inductive impedance so as to perform on-demand compensation on the impedance of the distributed capacitor, and the compensation precision and the power grid electric energy quality can be improved.

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 invention discloses a temperature compensation system for a broadband frequency modulation circuit, and relates to the technical field of integrated circuits, and the system comprises a temperature change characteristic testing module which is used for testing the tuning voltage temperature change characteristic of a voltage-controlled oscillator. And the thermistor configuration module is used for selecting a thermosensitive compensation resistor according to the tuning voltage temperature change characteristic. And the comprehensive simulation calculation module is used for performing a simulation test based on the tuning voltage temperature change characteristic and the thermosensitive compensation resistor to obtain a bias resistor set. And the compensation configuration module constructs a temperature compensation circuit according to the thermosensitive compensation resistor and the bias resistor data set. And the voltage compensation and synthesis module activates a temperature compensation circuit, performs temperature compensation of the initial frequency and the frequency modulation bandwidth, transmits a compensation result to the summator, and obtains a compensation voltage signal. And the compensation output module transmits the compensation voltage signal to the voltage-controlled oscillator for broadband frequency modulation. Therefore, the technical effects of online monitoring, complete monitoring and good early warning capability are achieved.

The invention relates to a double-axis optical fiber gyroscope, and provides a compensation method for reducing a cross coupling angle of a double-axis optical fiber gyroscope in order to solve the problems of time and labor waste, high risk, poor compensation effect and the like in an operation process of an existing mode for reducing the cross coupling angle. Comprising the following steps: mounting a hexahedron tool and a double-shaft optical fiber gyroscope on a rate turntable; adjusting the relative position relationship between the X-axis optical fiber ring mounting surface on the hexahedron tool and the rate turntable, recording the average value of the X-axis output values and the average value of the Y-axis output values of the double-axis optical fiber gyroscope when each rotation is completed, and calculating the Y-axis cross coupling angle of the double-axis optical fiber gyroscope; adjusting a relative position relation between a Y-axis optical fiber ring mounting surface on the hexahedron tool and the rate turntable, recording an average value of X-axis output values and an average value of Y-axis output values of the double-axis optical fiber gyroscope when each rotation is completed, and calculating an X-axis cross coupling angle of the double-axis optical fiber gyroscope; the X-axis output value and the Y-axis output value of the double-axis optical fiber gyroscope are compensated in real time.

The present invention relates to the field of industrial automation technology, and discloses an encoder calibration method, system, medium and equipment adapted to multi-directional shaft movement, comprising: installing a microcontroller unit on the encoder, arranging a first photosensitive module and a second photosensitive module on the encoder's code disk with the encoder's rotating shaft center as the center, and arranging a third photosensitive module between the two photosensitive modules; the first and second photosensitive modules convert the received light signals into sinusoidal signals and send them to the microcontroller unit, and the third photosensitive module converts the received light signals into electrical signals and sends them to the microcontroller unit; the microcontroller unit analyzes the deviation of the sinusoidal signal in frequency and phase to obtain the eccentric direction and eccentricity of the encoder shaft system shaking, calculates the encoder's rotation speed according to the electrical signal, obtains the dynamic shaft system shaking error in combination with the eccentric direction, eccentricity and rotation speed, and compensates the encoder's output in real time accordingly. The present invention has low cost and high compensation accuracy.

The invention provides a rectangular aperture curved surface shape error compensation method and system, and belongs to the field of free-form surface optical element ultra-precision machining.The method comprises the steps that the surface of a workpiece is machined based on an optimal moving path, coordinates and actual height values of all points on a curved surface shape are collected, and machining errors are obtained; performing unit square normalization on the processing error curved surface by using a Zernike polynomial, and then fitting a prediction error curved surface; and the predicted error curved surface is negated to correct the optimal moving path in the machining process, and the surface of the workpiece is remachined till the machining error meets the machining precision. The method strictly controls the precision and range of error compensation, and ensures that the compensated curved surface can meet the design requirements.

The present invention relates to the field of civil construction technology, and in particular to a civil construction support device, the civil construction support device comprises a plurality of support plates, the plurality of support plates are arranged in groups of two, and the two support plates in the same group are parallel and spaced apart; a support mechanism is arranged between the two support plates in the same group, the support mechanism comprises a threaded sleeve, a pushing portion and two first elastic members, the two ends of the threaded sleeve are symmetrical and two pitch-adjusting screws are threadedly inserted, and the rotation directions of the thread structures on the two pitch-adjusting screws are opposite; two fixed seats are symmetrically and fixedly arranged on two plate surfaces close to each other of the two support plates in the same group, one end of the pitch-adjusting screw away from the threaded sleeve is hinged on the fixed seat, and the hinged end of the pitch-adjusting screw is connected to the fixed seat through the first elastic member, and the pushing portion is used to drive the two support plates in the same group to move away from each other when the threaded sleeve is gradually tilted, so as to compensate for the change in the spacing between the two support plates in the same group due to the change in relative height.

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 relates to a display equipment brightness compensation method and device, equipment, a storage medium and a program product. The method comprises the following steps: acquiring the current use duration of a to-be-compensated display device; the current use duration is input into a brightness decay rule function of the display device, the current brightness decay rate of the display device is obtained, and the brightness decay rule function is generated according to original brightness data of multiple time nodes of the display device in the to-be-measured time period; determining a current voltage loss value of the display equipment according to the current brightness decay rate of the display equipment; and determining a compensated driving voltage value of the display equipment according to the current voltage loss value of the display equipment. By adopting the method, the brightness compensation effect of the display equipment can be improved.

The invention provides an optimization method for a built-in permanent magnetic mechanism, and relates to the technical field of built-in permanent magnetic mechanisms, and the method achieves the dynamic and precise temperature compensation of the magnetic induction intensity of the permanent magnetic mechanism through testing the temperature change of the permanent magnetic mechanism in an actual working environment, generating a PWM control signal based on the time sequence analysis, and employing a compensation coil to achieve the dynamic and precise temperature compensation of the magnetic induction intensity of the permanent magnetic mechanism. The temperature coefficient is obtained through a temperature gradient test, the compensation coil parameters are determined through simulation modeling, and the composite constraint optimization design is utilized, so that the compensation precision and the system stability are remarkably improved. Meanwhile, by considering the production cost and the use cost, the weight is dynamically adjusted, and the design economy and the market competitiveness are optimized. Through the improvements, the problems of inaccurate temperature compensation, high cost and poor market adaptability in the prior art are effectively solved, so that the permanent magnetic mechanism can keep the optimal performance in various working environments, and the permanent magnetic mechanism has remarkable engineering application value and market popularization prospect.

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.

The present invention discloses a method for improving the electromagnetic compatibility of a motor controller based on a discharge circuit, and relates to the electromagnetic compatibility technical field of a permanent magnet brushless DC motor controller. The method comprises the following steps: improving the discharge circuit, obtaining the current change amplitude of the controller bus at the discharge circuit input end and the harmonic current of the controller bus at the discharge circuit output end; obtaining the harmonic interference noise of the controller by using a fast Fourier transform; obtaining the compensation current amplitude of the controller by using a digital filtering method; and generating a control signal for suppressing the harmonic current of the controller bus according to the compensation current amplitude of the controller, so as to improve the electromagnetic compatibility of the motor controller. The present invention can improve the electromagnetic compatibility performance of the motor controller in different application scenarios by improving the discharge circuit and combining the hardware improvement design with the corresponding algorithm.

The present invention provides a metal film pressure core and a preparation method, which relates to the technical field of pressure sensor sensitive elements, so as to optimize the pressure core structure to a certain extent, improve the output sensitivity, zero temperature drift and sensitivity temperature drift of the pressure measuring bridge, and enhance the working temperature range and accuracy of the sensor. The metal film pressure core provided by the present invention includes an elastic substrate, an insulating layer, a compensation resistor, an alloy resistor, a silicon strain component, a connector and a lead; a pressure inlet is formed on the pressure-sensing side of the elastic substrate, the insulating layer is attached to the back pressure side of the elastic substrate, and the compensation resistor, the alloy resistor and the silicon strain component are all deposited on the insulating layer; the connector connects the alloy resistor and the silicon strain component to form a Wheatstone measuring bridge, one end of the lead is connected to the Wheatstone measuring bridge, and the other end is connected to an external signal processing circuit.

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.