12results about How to "Avoid performance impact" patented technology

This utility model discloses a low-voltage battery system for electric vehicles using sodium batteries, comprising a battery management module, several sodium-ion batteries connected in series to form a sodium-ion battery pack, several temperature sensors, a shunt, a discharge switch composed of several MOSFETs, a total positive output terminal, a total negative output terminal, and a one-button start switch. The system's output voltage matches the original vehicle's lead-acid battery, allowing for direct replacement without modifying the vehicle's electrical circuit, demonstrating strong adaptability. After undervoltage lockout, the system can be restarted by pressing and holding the one-button start switch, avoiding the cumbersome operation of external jump-starting and improving user experience. Temperature sensors monitor cell temperature in real time, preventing the impact of high / low temperatures on battery performance. The shunt, in conjunction with the total current detection unit, provides overcurrent protection, extending system lifespan. Sodium-ion batteries eliminate the need for complex protection for individual cells, reducing costs by more than 30% compared to lithium-ion battery systems, making them easier to scale up.

The application discloses a permanent magnet synchronous motor rotating speed ring control method and device, medium and equipment, relates to the permanent magnet synchronous motor control technical field.The application first realizes accurate real-time estimation on the load torque by using a supercoil sliding mode load observer, then on-line self-adapting adjustment of the sliding mode controller parameters is realized according to the real-time rotating speed and load torque working condition based on a pre-trained neural network model, and finally the rotating speed is accurately controlled through the sliding mode controller after parameter adjustment.The application effectively solves the influence of load disturbance on the system performance, realizes self-adapting adjustment of the sliding mode controller parameters based on the working condition through the neural network model learning of the applicable relationship between the real-time rotating speed and load torque working condition and the sliding mode controller parameters, overcomes the defects that the traditional sliding mode control parameters are difficult to set, and significantly improves the rotating speed tracking precision, dynamic response speed and overall stability of the system of the permanent magnet synchronous motor under complex working conditions.

The application discloses a VSG primary frequency modulation channel power equalization control method, medium and equipment, and relates to the technical field of inverters. The method comprises the following steps: collecting the local output active power and the local frequency of each VSG; calculating the local capacity occupancy rate, and constructing the primary frequency modulation coefficient of the load-throwing increase channel and the primary frequency modulation coefficient of the load-cutting decrease channel; identifying the load-throwing event or the load-cutting event according to the change rate of the local frequency, and calling the corresponding primary frequency modulation coefficient; in response to the triggering of the load-throwing event or the load-cutting event, recording the current event frequency and the primary frequency modulation power increment, and combining the called primary frequency modulation coefficient to generate the incremental primary frequency modulation power instruction. The medium and the equipment are used for implementing the above method. The application has the beneficial effects that: through the constructed primary frequency modulation coefficient, the capacity occupancy rate difference of each VSG changes in the decreasing direction in each load switching process, and the power equalization control of each VSG under the condition of no communication is realized.

The invention discloses a circuit and a chip for actively reducing power supply noise. The circuit comprises a logic control module, an internal clock module and a power driving output module, the logic control module is used for generating an input signal to the power driving output module; the internal clock module is used for providing a clock signal for the logic control module; the power driving output module is used for generating driving current according to an input signal; the power driving output module comprises an output control unit, an operational amplifier driving unit and an output high-power tube; the output control unit is used for controlling the output state of the output high-power tube according to the input signal and providing bias current for the operational amplifier driving unit; and the operational amplifier driving unit is used for controlling the grid electrode of the output high-power tube and enabling the current of the output load to be constant when the power supply voltage changes, and is also used for releasing the charges stored in the output high-power tube. According to the invention, a capacitor is not needed for power supply filtering, and the problems of influence on the performance of the battery and thermal runaway caused by electric leakage of the capacitor are avoided.

The application provides a mobile robot self-learning robust control method based on a hybrid Kalman filter and belongs to the technical field of robots.The technical scheme comprises the following steps: step 1, a dynamic model of an uncertainty factor;step 2, real-time estimation of state parameters and model parameters of the mobile robot to optimize the original dynamic model;step 3, introduction of an adaptive forgetting factor recursive least square method to dynamically adjust filter parameters;step 4, design of a non-singular fast terminal sliding mode controller based on a saturation function as a system main controller;step 5, establishment of an error correction RBF neural network and introduction of an adaptive error learning strategy;step 6, completion of stability analysis and proof of the control system by means of Lyapunov stability theory and simulation experiment of the optimized model.The application effectively suppresses the chattering of the sliding mode control and significantly improves the control precision and robust performance of the four-wheel robot.

This application discloses a speech recognition method, apparatus, storage medium, and device. The method includes: firstly, extracting the audio features of the acquired target speech, then inputting them into a preset acoustic model to obtain the acoustic state posterior score for each frame of audio; and constructing a general-scene FSA network model based on pre-imported general-scene FSA hot words; then, using a preset decoding algorithm to perform parallel decoding on the preset general-scene model and the general-scene FSA network model to obtain a first recognition result and a second recognition result; furthermore, during the target speech recognition process, importing N special-scene FSA hot words, and constructing a special-scene FSA network model based on the special-scene FSA hot words and preset conditional judgment logic; then, decoding the special-scene FSA network model to obtain a third recognition result, and determining the final recognition result corresponding to the target speech based on these three recognition results. This avoids performance impact and effectively improves the accuracy of the recognition results.

The application relates to an article quality detection method and device, computer equipment, a storage medium and a program product. The method relates to artificial intelligence and comprises the following steps: acquiring article image data to be detected; performing quality detection on the article image data by using a trained quality detection model to obtain a quality detection result corresponding to the article image data. The trained quality detection model is obtained by supervising and training a second detection model according to weight data and output probability of each convolution layer of a first detection model. The convolution layers of the first detection model and the second detection model correspond to each other, and the first detection model is trained according to a standard data set of noise-free data. By using the method, the influence of data carrying noise on the model performance of the second detection model can be overcome, the quality detection model obtained by training can output stable and reliable quality detection results, and the accuracy of the quality detection result of the article is improved.

The utility model provides a kind of winding filter element, including center framework, center framework is cylindrical structure, the inside of center framework has water cavity, the side surface of center framework is equipped with multiple through holes with water cavity, the outside of center framework is wrapped with filter main body, filter main body is cylindrical hollow structure, filter main body is composed of winding film wound on the outer surface of center framework, winding film includes first film layer and second film layer superimposed together, first film layer has first surface and second surface, first surface and second surface are opposite, second film layer covers superimposed in the first surface of first film layer, first film layer is polypropylene filter membrane, and second film layer is sterilization filter paper.

The dry powder cylinder for dialysis comprises a cylinder body, a sealing cover arranged at the top end of the cylinder body in a covering mode and a filter piece arranged in the cylinder body, the sealing cover comprises a cover body part and a filter element part, the cover body part is provided with a liquid inlet channel, the filter element part is located in the liquid inlet channel, and the circumferential outer edge of the filter element part is integrally connected with the circumferential inner wall of the liquid inlet channel; a liquid outlet channel is arranged at the bottom end of the cylinder body, the filter piece comprises a filter piece part, a connecting part vertically extending outwards from the circumferential outer edge of the filter piece part, and a clamping part extending outwards in the radial direction of the filter piece part from one end, far away from the filter piece part, of the connecting part, and a plurality of filter holes are formed in the filter piece part; the plurality of filter holes are uniformly formed at intervals around the center of the filter disc part, and the filter disc is clamped with the circumferential inner wall, right above the liquid outlet channel, in the cylinder body through the clamping part. In addition, the sealing cover and the filtering piece are both manufactured through the integrated injection molding technology, the production technology is simplified, the production cost and the use cost are reduced, and the treatment burden of a patient can be reduced.

The present application relates to the field of organic materials, in particular to a black polyimide film and a preparation method thereof.The black polyimide film provided by the present application has a polyimide with a structure shown in formula (L).In the preparation method provided by the present application, an aniline oligomer diamine shown in formula (II) is used, wherein each bridging nitrogen atom is coupled with a protective group, such as benzyloxy carbonyl or tert-butyloxy carbonyl; the above-mentioned diamine monomer is homopolymerized or copolymerized with a diamine monomer shown in formula (III) and a dianhydride monomer to form a resin solution; then, a polyimide / polyamic acid film is prepared through a film forming process; and then, a deprotection group treatment is performed, so that an intrinsic black polyimide film is obtained.The polymer prepared by the present application has excellent solubility, and after the deprotection, the material exhibits uniform black properties, excellent solvent resistance and mechanical properties, thereby solving the contradiction between the processing performance and the solvent resistance and mechanical properties.

The invention provides a preparation method of a large-area ultrathin perovskite single crystal. The preparation method comprises the following steps: S1, obtaining a perovskite seed crystal; s2, putting the perovskite seed crystal in the step S1 into a first solvent, and heating to carry out heat treatment on the perovskite seed crystal to change a surface microstructure; s3, placing the treated perovskite seed crystal in a glass container, sequentially adding a second solvent and a perovskite precursor growth solution, and placing the glass container on a heating stage to obtain a perovskite single crystal with the thickness of 1-2cm; s4, fixing the perovskite single crystal on a glass sheet by using paraffin, cutting off seed crystals in the perovskite single crystal by using a blade, and thinning the perovskite single crystal to obtain a large-area ultrathin perovskite single crystal wafer; wherein the second solvent in the step S3 is immiscible with the perovskite precursor growth solution, and the density of the second solvent is smaller than that of the perovskite precursor growth solution. The method has the advantages of inhibiting the growth of the crystal in the vertical direction, reducing the carrier recombination rate and reducing the crack and breakage probability.

The application discloses a circuit board and a manufacturing method thereof, and relates to the technical field of electronic circuit manufacturing. The manufacturing method of the circuit board comprises the following steps: providing a prefabricated circuit board; the prefabricated circuit board comprises a first base material, a carbon powder pattern formed on the first base material, and a conductive pattern formed on the region of the first base material which is not covered by the carbon powder pattern; wherein the carbon powder pattern is composed of at least carbon powder and hot melt resin; providing a second base material; the adhesion F1 between the first base material and the carbon powder pattern in a molten state and the adhesion F2 between the second base material and the carbon powder pattern in a molten state satisfy the following relationship: F1 < F2; placing the second base material on the carbon powder pattern of the prefabricated circuit board, and removing the carbon powder pattern from the first base material by a hot-pressing method to obtain a target circuit board. In the application, the removal of the carbon powder pattern is realized by the hot-pressing transfer method, the influence of the carbon powder pattern on the performance of the circuit board is effectively avoided, and the user experience is improved.