16results about How to "Accurate compensation" patented technology

The invention discloses a household appliance, which comprises a shell, a motor and a controller, and is characterized in that the motor is arranged in the shell and is used for operating according to alternating current input voltage; the controller is configured to detect motor parameters of the motor in real time when the motor operates; determining a q-axis voltage compensation value of the motor based on the motor parameters of the motor; adjusting the q-axis voltage value of the motor according to the q-axis voltage compensation value to adjust the voltage value of the motor to the target voltage value, thereby reducing the low-frequency pulsation of the motor, achieving the precise regulation and control of the motor, facilitating the improvement of the stability of the motor, prolonging the service life of the motor, and improving the overall performance of the electric equipment and the user experience.

The method comprises the following steps: extracting frequency information of power grid voltage based on a characteristic harmonic compensation method of an improved STATCOM to obtain a reference phase and frequency of h-order harmonic; the load current is converted into a d-q coordinate system through a Cabc-dqh change matrix module and decomposed into a load active current component and a load reactive current component, and then a reference current instruction value is obtained through low-pass filtering; performing low-pass filtering on the active current component and the reactive current component to obtain a system side current component as a reference value; comparing each separated harmonic current component with a reference value, and inputting the current components to a fuzzy PI controller to obtain voltage compensation instructions of the characteristic harmonic waves under a d axis and a q axis respectively; and superposing each compensation instruction and the original reactive compensation and direct-current voltage control instruction of the STATCOM, and then inputting PWM (Pulse Width Modulation) to enable the STATCOM to output current containing a characteristic harmonic compensation component. According to the method, multi-synchronous rotating coordinate system detection and fuzzy PI adaptive control are introduced, and dynamic and accurate compensation of multiple characteristic harmonics is realized on the premise of not changing the main circuit topology of the STATCOM.

The invention discloses a robot joint with multi-pole-pair asymmetric magnetic braiding, a joint module and a motor driver, the joint module is provided with a rotating shaft, and the rotating shaft is provided with a permanent magnet which rotates coaxially and is excited radially; a magnetic encoder chip is arranged on the motor driver and is used for sensing the pointing angle of the permanent magnet; the motor driver is electrically connected with a three-phase port of a motor in the joint module; the excitation of the permanent magnet is multi-pole-pair and asymmetric, the number P of pole pairs is larger than 1, a symmetric excitation reference line is obtained by equally dividing the permanent magnet into P parts along a mechanical rotation angle, the actual excitation of the permanent magnet and the symmetric excitation reference line do not coincide and are staggered by a certain angle, and the staggered angle continuously changes along with the mechanical rotation angle. According to the robot joint with the multi-pole-pair asymmetric magnetic braiding, the limitation of conventional multi-pole-pair magnetic braiding on mechanical angle compensation can be overcome, and the angle sensing and control precision of a robot joint module is improved.

The embodiment of the invention provides a power grid harmonic reactive compensation method and system based on a synchronous boosting transformer, and relates to the technical field of power grid harmonic reactive compensation, and the method comprises the steps: collecting the instantaneous voltage information and instantaneous current information of a power grid, and the voltage information and current information of a winding of the synchronous boosting transformer; analyzing an instantaneous harmonic demand and an instantaneous reactive demand of the power grid according to the instantaneous voltage information and the instantaneous current information of the power grid; analyzing a magnetic state and a saturation risk of the synchronous boosting transformer according to the voltage information and the current information of the winding of the synchronous boosting transformer; generating a compensation current instruction according to the instantaneous harmonic demand, the instantaneous reactive demand, and the magnetic state and saturation risk of the synchronous boosting transformer; and generating a compensation current according to the compensation current instruction and injecting the compensation current into a power grid. The power quality and the operation stability of the power grid can be improved.

The application discloses a kind of based on computer simulation building carbon emission prediction method and system, it is related to building energy saving and carbon emission monitoring technical field.The method is represented by equivalent heat network with the heat conduction process of envelope structure, and heat resistance and heat capacity parameters are set as learnable parameters, and are encoded into differentiable calculation layer by automatic differentiation framework;Obtain time-varying marginal carbon emission factor sequence, and multiply energy consumption simulation value and corresponding marginal carbon emission factor element by element by time step by time step by carbon emission factor coupling layer to generate carbon emission simulation sequence;Residual correction network is based on simulation intermediate state quantity and carbon emission simulation sequence to output residual correction value, and the carbon emission simulation sequence is added to obtain carbon emission prediction value;With prediction error as loss function, physical parameters and network parameters are updated simultaneously by back propagation, to realize physical parameter adaptive adjustment.System includes differentiable thermodynamic simulation module, carbon emission factor coupling module, residual correction module, end-to-end training module and prediction execution module.

The application discloses a kind of positioning of long-distance magnetic target and its design method, belong to the target positioning technical field based on magnetic field.It includes: S100, the position coordinates and magnetic moment of magnetic interference source are inverted using short baseline magnetic detection system, then real-time stripping interference magnetic field generated by magnetic interference source at long baseline magnetic detection system using inversion result, finally realize long-distance magnetic target positioning using long baseline magnetic detection system, obtain the magnetic moment vector m2 of magnetic target;S200, according to actual working condition and detection demand, the design method of each parameter of magnetic detection system is proposed in combination with the magnetic moment vector m2.The application uses short baseline magnetic detection system to real-time strip platform magnetic interference, and realizes long-distance magnetic target positioning using long baseline magnetic detection system.

The application provides a precision attenuation compensation method and system based on a high-precision flattening machine. The method comprises: obtaining precision attenuation evaluation multi-source sensing data by evaluating precision attenuation risk levels, obtaining precision attenuation evaluation influence data by local inversion, obtaining roll system state evolution prediction data by five-field coupling digital twin model analysis, performing multi-objective optimization analysis and processing to obtain feedforward compensation sequence parameters, obtaining flattening machine state evaluation data after compensation execution and stiffness reconstruction processing, obtaining multi-device collaborative compensation values by line multi-device collaborative compensation module analysis, and obtaining flattening measured roll gap analysis precision attenuation compensation evaluation state; the application realizes accurate precision attenuation compensation through adaptive modular sensing, multi-field coupling processing, device and process linkage intelligent decision and self-healing execution, completes data inversion, multi-field coupling prediction, multi-objective optimization feedforward compensation, and macro, micron and thermal deformation multi-scale self-healing execution.

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

The invention discloses a self-adaptive predefined time fault-tolerant trajectory tracking control method for a quad-rotor unmanned aerial vehicle, and belongs to the field of quad-rotor unmanned aerial vehicle control. The method is characterized by comprising the following steps: step 1, establishing a kinetic model and a mathematical model of the quad-rotor unmanned aerial vehicle; 2, determining a saturation-capacity preset performance index of the four-rotor unmanned aerial vehicle; 3, determining a preset time disturbance observer of the four-rotor unmanned aerial vehicle; step 4, determining a position subsystem of the four-rotor unmanned aerial vehicle; 5, determining an attitude subsystem of the four-rotor unmanned aerial vehicle; and based on the disturbance observer, the position subsystem and the attitude subsystem determined in the steps 3-5, performing fault-tolerant trajectory tracking control of the quad-rotor unmanned aerial vehicle. According to the adaptive predefined time fault-tolerant trajectory tracking control method for the quad-rotor unmanned aerial vehicle, by designing the preset time disturbance observer, the problem of composite disturbance estimation formed by actuator faults and external disturbance is effectively solved, and accurate estimation and compensation within the time specified by a user are achieved.

The application relates to the technical field of display screens, and discloses a self-adaptive adjusting method and device of a display screen, equipment and a storage medium, wherein the method comprises the following steps: determining each environment light partition and a partition exposure value of each environment light partition according to a preset division configuration and a viewing user space image; determining a viewing user distribution area and a viewing range angle according to the viewing user space image; determining an influence weight of each environment light partition according to the viewing user distribution area, the viewing range angle and each partition exposure value; determining a target backlight brightness compensation value and a target Gamma compensation value according to each influence weight, each partition exposure value and a preset compensation mapping table, and performing display adjustment according to the target backlight brightness compensation value and the target Gamma compensation value. Therefore, more accurate display effect compensation is achieved.

The application discloses a time delay interference laser phase noise compensation method and device for optical frequency domain reflection, and comprises the following steps: obtaining a linear sweep signal light based on a signal source; obtaining a first heterodyne signal through a measurement interferometer, and obtaining a second heterodyne signal through a reference interferometer; and processing the first heterodyne signal and the second heterodyne signal by using a time delay interference algorithm, so that direct compensation of laser phase noise is realized; and obtaining a strain signal based on the direct compensation of the laser phase noise. Through compensation of the laser phase noise, high-precision measurement of the strain signal can be realized at a distance far beyond the coherence length of the light source.

The application discloses a kind of based on retrieval enhancement cross-modal condition diffusion model emotion recognition method and system, the method receives text, speech, image multimodal data, detects modality integrity and extracts existing modal feature;If there is missing mode, based on existing modal feature in external sample library retrieval similar sample, weighted fusion generates retrieval enhancement representation;Cross-modal condition diffusion model is constructed, and missing modal feature is recovered by combining forward diffusion into information, reverse diffusion and iteration unified cross-modal attention mechanism;Splice complete modal feature, pass through Transform fusion network and joint loss function optimization, output emotion category and intensity.The application breaks through the limitation that existing generation model only relies on local information, fully utilizes the combination advantage of external retrieval and diffusion generation, can maintain stable performance under a variety of missing patterns, and has wide application prospect.

The application provides a gain compensation method, device, optical amplifier and storage medium, and belongs to the technical field of optical communication. The method is applied to an optical amplifier. In the method, after the power of input signal light changes, the power of pump light of the optical amplifier is adjusted based on power change information of the input signal light, the input signal light is amplified by using the pump light with the adjusted power, and the input signal light is gain compensated. In this way, the input signal light can be gain compensated only by detecting the power change information of the input signal light, the optical amplifier does not need to be in a full wave state for a long time, and therefore, the failure rate of the optical amplifier can be reduced.

The application provides a sensor signal attenuation calibration method, device, equipment and storage medium, and relates to the technical field of computers.The method comprises the following steps: acquiring a real-time detection signal of a target sensor; determining a target feature value corresponding to the real-time detection signal under each first feature dimension in a feature dimension set; the first feature dimension is strongly related to the concentration of a to-be-measured object; inputting the target feature value under each first feature dimension into a concentration estimation model for concentration calibration processing to determine a calibrated concentration corresponding to the to-be-measured object; the concentration estimation model is obtained by pre-training according to multiple sample feature values under the first feature dimension and the concentration of a sample object corresponding to each sample feature value; each sample feature value and the concentration of each sample object are determined according to sample detection signals of sample sensors with different aging degrees under different working conditions. The technical scheme can improve the accuracy of the sensor detection signal.

The application relates to a pre-lithiation reagent and a preparation method, a lithium ion battery negative electrode and a preparation method, and a lithium ion battery, and belongs to the technical field of lithium ion batteries, and comprises the following steps: dispersing a lithium-silicon alloy, ammonium hexafluorozirconate and a hydrophobic polymer in a non-polar solvent, and performing in-situ reaction at 60-180 DEG C; then performing vacuum filtration on the system after reaction; and drying the solid-phase product obtained through the vacuum filtration to obtain the pre-lithiation reagent. The pre-lithiation reagent prepared by the application realizes fiberization of a main binder under stirring together with an active substance, a conductive agent and a double-binder system, and a high-load self-supporting thin film material prepared through dry rolling is used as a negative electrode sheet, precise and uniform compensation of active lithium is realized under the condition of no organic solvent, the prepared negative electrode sheet has excellent chemical stability in a room-temperature high-humidity environment, and has an outstanding industrial application prospect.

The invention discloses a pumped storage ultrasonic flowmeter temperature compensation model and method based on LSTM (Long Short Term Memory), and aims to overcome the defect that an existing temperature compensation method is difficult to process nonlinear and dynamic temperature influences under complex working conditions of a pumped storage power plant. According to the method, temperature, ultrasonic propagation time and flow data under laboratory simulation and on-site actual working conditions are collected, and after cleaning and standardized preprocessing, a neural network model comprising an input layer, an LSTM layer, a full-connection layer and an output layer is constructed and trained. The model can learn a long-term time sequence dependency relationship between the temperature and the flow error, outputs a high-precision error compensation value, and is deployed on a main control chip of the flow meter to realize real-time dynamic compensation. The measurement precision and adaptability of the ultrasonic flowmeter under the wide temperature range condition are remarkably improved, and reliable support is provided for precise operation of a pumped storage power plant.