47results about How to "Improve control quality" patented technology

The invention discloses a water-based acrylate composite adhesive emulsion, a water-based acrylate composite adhesive and a preparation method, and belongs to the technical field of acrylate composite adhesives. The waterborne acrylate composite adhesive emulsion is prepared from the following components in parts by weight: 450 to 520 parts of deionized water, 250 to 300 parts of a soft monomer, 119 to 215 parts of a hard monomer, 45 to 55 parts of polyurethane resin, 5.0 to 5.5 parts of a reactive emulsifier, 1 to 11 parts of a non-reactive emulsifier, 1.5 to 10.5 parts of a self-crosslinking monomer and 3.25 to 3.34 parts of an initiator. According to the invention, the non-reactive emulsifier and the reactive emulsifier are simultaneously used for emulsifying and modifying the polyurethane resin and the acrylate copolymer, so that the influence that the non-reactive emulsifier is easy to migrate to the surface of an adhesive film, so that the water resistance and the humidity and heat resistance of the composite adhesive become poor can be weakened; therefore, the moisture and heat resistance of the water-based acrylate composite adhesive can be improved.

The invention relates to a rapid guidance method for an unmanned ship, which comprises the following steps of: establishing a parameterized reference path, determining a position and attitude relationship of the unmanned ship on a horizontal plane, designing a finite time drift angle observer for accurately observing an unknown drift angle of the unmanned ship, defining an estimated value of the drift angle, an adjusting parameter and an error term, and determining the position and attitude relationship of the unmanned ship on the horizontal plane. Deriving a derivative expression of the error term, proving that the error term converges to zero in finite time, establishing a drift angle estimation formula, and proving that the observation error converges to zero in finite time; designing a virtual speed and an updating law thereof; designing a nonlinear function for accelerating the convergence speed of the lateral error; establishing a line-of-sight tracking angle formula; and by parameterizing the reference path and accurately calculating the error between the unmanned ship and the virtual target point and combining the derivative expression of the error, the unmanned ship can be more accurately controlled to sail along the preset path, and the path tracking precision is remarkably improved.

The anti-disturbance control method of the high-altitude platform air intake system based on the non-smooth feedback function of the present invention includes 1. establishing the main equipment characteristic models such as the cavity pressure model, the regulating valve flow model and the regulating valve control model of the high-altitude platform air intake control system, and constructing an approximate second-order system model of the air intake control system; 2. designing a non-smooth feedback function algorithm; 3. constructing a nonlinear enhanced filtering algorithm; 4. introducing adjustment signal amplitude parameters and phase compensation parameters to improve the signal processing capability of the nonlinear enhanced filtering algorithm; 5. feeding back the pressure output filter signal obtained in 4 to the non-smooth feedback sliding mode controller obtained in 2, and the non-smooth feedback sliding mode controller algorithm and the nonlinear enhanced filtering algorithm are used together in the air intake control system to realize the control of the intake pressure in the transient state test of the aircraft engine. Step 6: repeat the above 2 to 5.

The invention discloses an induced draft fan system surge fault early warning method, device and system and a storage medium. The method comprises the steps of obtaining historical operation data of a to-be-predicted induced draft fan system; related variables related to the to-be-predicted operation parameters are screened according to expert experience and Pearson correlation analysis; constructing an ELM model, and training the ELM model by using the historical operation data of the to-be-detected induced draft fan system to obtain a state detection model of the to-be-predicted induced draft fan system; using the induced draft fan system state detection model to predict the operation parameters of the to-be-detected induced draft fan system to obtain model prediction values of the surge fault operation parameters of the to-be-detected induced draft fan system; and obtaining an actual value of the operation parameter, and comparing the actual value of the operation parameter of the induced draft fan system to be detected with the model prediction value according to a preset judgment logic to obtain a detection result of the surge fault of the induced draft fan system. According to the invention, dynamic monitoring and early-stage fault early warning of the surge fault of the induced draft fan are realized.

The utility model relates to the technical field of Liupao tea processing, in particular to a Liupao tea steaming processing device which comprises a device body, a centrifugal rotating disc is arranged in an inner cavity of the device body, and the centrifugal rotating disc is of a horn mouth structure; an air exhaust assembly is arranged above the centrifugal rotating disc; a steam injection assembly is arranged below the centrifugal rotating disc; a plurality of vent holes are formed in the centrifugal rotating disc; the device further comprises a tea leaf discharging pipe and a tea leaf collecting channel. The tea leaf discharging pipe is arranged above the center of the centrifugal rotating disc. The tea leaf collecting channel is arranged on the periphery of the centrifugal rotating disc and is used for collecting tea leaves thrown out by the centrifugal rotating disc; the steam spraying assembly is externally connected with a steam generator and sprays steam to the position below the centrifugal rotating disc, and the steam flows upwards and flows to the position above the centrifugal rotating disc through the vent holes. The tea steaming machine has the advantages of being good in steaming uniformity, high in efficiency, good in tea quality and the like.

The embodiment of the invention provides an ultrasonic transducer, a preparation method of the ultrasonic transducer, an ultrasonic fingerprint module and electronic equipment. The preparation method of the ultrasonic transducer comprises the following steps: forming a bottom electrode on the upper surface of a substrate, and forming a piezoelectric layer covering the bottom electrode on the upper surface of the substrate; a top electrode material layer covering the piezoelectric layer is formed above the substrate; a second material layer part of the top electrode material layer is removed, a first material layer part which is preset for forming a top electrode in the top electrode material layer is reserved, and the second material layer part is the other part, except the first material layer part, in the top electrode material layer; and forming a top electrode based on the reserved part of the first material layer to obtain the ultrasonic transducer. According to the technical scheme provided by the embodiment of the invention, the ultrasonic transducer with relatively good performance can be prepared.

The invention relates to the technical field of industrial automation control, in particular to a valve positioner control algorithm switching method, system and device based on self-tuning and a storage medium, and the method comprises the steps that S1, a self-tuning calibration process is executed on a valve, and motion parameters including the whole-course motion time, the position deviation and the minimum effective control quantity of the valve are obtained; s2, according to the motion parameters, a discrimination factor representing the resistance characteristic of the valve is obtained through calculation according to a preset weighted calculation formula; and S3, comparing the discrimination factor with a preset critical value, automatically selecting a target control algorithm from a plurality of pre-stored control algorithms according to a comparison result, and performing closed-loop control on the valve by adopting the target control algorithm. According to the method, the control algorithm and the resistance characteristic of the valve are automatically and accurately matched, the adaptability, the stability and the control quality of valve control are effectively improved, and meanwhile the debugging and maintenance cost is remarkably reduced.

The invention discloses a preparation method of a high-ionic-conductivity solid electrolyte material of a solid-state battery, a pure-phase sulfide solid electrolyte is prepared in a solvent-free and dry method mode, generation of impure phases can be reduced, the purity and ionic conductivity of the sulfide solid electrolyte are further improved, the electrochemical stability is enhanced, and meanwhile, the solid-state battery has the high-ionic-conductivity solid electrolyte material. The high-purity sulfide solid electrolyte is beneficial to further improving the rate capability of the all-solid-state battery and improving the energy density, and a solid material basis is provided for performance improvement and reliability of the all-solid-state battery.

The application discloses an IBCU plunger cavity rigidity self-learning algorithm and relates to the technical field of hydraulic brake-by-wire systems, and comprises the following steps: triggering a plunger cavity sealing detection state in the IBCU power-on process; when the plunger cavity pressure and the plunger position meet the credible condition, acquiring the pressure data of the plunger cavity in the pressure building process and the corresponding plunger cavity liquid consumption volume data. The application acquires the plunger cavity rigidity parameter through self-learning, realizes individual modeling, and improves the parameter accuracy; optimizes the liquid quantity estimation based on the corrected rigidity parameter, improves the pressure building speed and the control accuracy, especially improves the single round pressure building performance; simultaneously compensates the individual differences, enhances the system consistency, makes the theoretical model and the actuality more matched, and thus improves the overall braking performance and stability.

The present invention relates to a fractional-order PI control method for a fractional-order dual-active bridge converter, specifically, according to the system parameters of the fractional-order dual-active bridge converter, the fractional-order transfer function from control to output of the fractional-order dual-active bridge converter is calculated; according to the fractional-order transfer function, the open-loop transfer function of the fractional-order dual-active bridge converter control system is determined; according to the open-loop transfer function, the minimum objective function of the parameters to be optimized of the fractional-order PI controller is designed; according to the minimum objective function, the control parameters of the fractional-order PI controller are optimized using a genetic algorithm. The present invention guides the parameter design of the optimal fractional-order PI controller of the fractional-order dual-active bridge converter based on the fractional-order model of the dual-active bridge converter and the expected effect, so as to obtain the optimal performance of the system, so that the system has a faster response speed, a smaller overshoot, a stronger anti-disturbance ability, and better control quality.

The invention relates to a camshaft adjuster (1) for the relative rotation of a camshaft (2) relative to a crankshaft, having a stator (3) and a rotor (4) which is rotatable relative to the stator (4) about an axial axis (a), two counteracting, oilable working chambers (A, B), a front cover (5) and a rear cover (6) which axially enclose the working chambers (A, B), a control valve (7) by means of which the working chambers (A, B) can be acted upon by oil pressure, an oil reservoir (8) for the oil, an oil drain channel (9) which guides leakage oil escaping between the rotor (4) and the front cover (5) to the oil reservoir (8), wherein an additional oil drain channel (10) guides further leakage oil to the oil reservoir (8).

The utility model particularly relates to an anti-deformation chessboard box which comprises a chessboard box body and a bottom plate arranged at the lower end of the chessboard box body, and a containing cavity for containing an intelligent control terminal is defined between the chessboard box body and the bottom plate. The chessboard box body comprises a first main body and a second main body arranged at the lower end of the first main body, a hollow part is formed in the middle of the first main body, a splicing groove is concavely formed in the peripheral area, corresponding to the hollow part, of the upper end face of the second main body, and the first main body is embedded in the splicing groove; the depth of the splicing groove is smaller than the thickness of the first main body, and a concave cavity used for containing an intelligent chessboard panel and a circuit board electrically connected with the intelligent chessboard panel is formed between the upper end face of the second main body and the hollowed-out part of the first main body. The chessboard box obtained through the structural arrangement is stable in structure, smooth and flat in surface, free of deformation, free of exposed splicing seams, standard in size and controllable in quality, and therefore the application requirement for precise movement of chess pieces on an intelligent panel can be met.

The application discloses a kind of pet snack processing uses air-drying equipment and process, it is related to meat product drying technical field, the first flexible hollow plate and the second flexible hollow plate are set to each other by the present application, for flexible clamping to meat strip, reciprocating transverse extrusion force is applied to the left end of two flexible hollow plates by first electric push rod, so that the two flexible hollow plates of pair arrangement can be clamped meat strip reciprocating bending, flatten, so that the hard shell formed on the surface of meat strip can be periodically destroyed, guarantee the smoothness of internal moisture export in the process of meat strip air-drying, not only can effectively improve air-drying efficiency, but also can significantly improve palatability after meat strip air-drying, and it has good applicability to young, old and pet population with weak oral function.

The invention discloses a magnetic suspension device, comprising a float, a magnetic base and a controller; the magnetic base comprises a chassis, two or three excitation coils, a permanent magnet array and a float position monitoring unit; the chassis is a mounting surface for the excitation coil and the permanent magnet array; the float position monitoring unit is arranged at the center point of the chassis for real-time detection of the current position of the float on the suspension plane and transmits it to the controller; the controller compares the current position value with the target position value, generates a position deviation signal, combines the force analysis and the calculation result of the electromagnetic force between the excitation coil and the float, changes the current magnitude and direction in all the excitation coils, so that the resultant force F of all the excitation coils on the float is P The float can be pulled to the target position value. The present invention breaks through the limitation that a set of two coils in pairs can only realize the control of the degree of freedom in a certain direction, can save space and materials, and is conducive to the miniaturization of the magnetic suspension device.

A trajectory tracking control method for a Mecanum wheel mobile robot based on fuzzy inverse sliding mode includes the following steps: (A) establishing a multi-input multi-output model according to kinematic and dynamic mechanisms for an actual Mecanum wheel mobile robot; (B) designing an inverse sliding mode surface and an equivalent control law according to desired control performance; (C) designing a system state arrival control law based on the sliding mode surface and the equivalent control law set in step (B); (D) designing a fuzzy function to replace the sign function based on the inverse sliding mode control law designed in steps (B) and (C) to obtain a final control law so that chattering can be suppressed. The present invention provides a design method for a fuzzy inverse sliding mode control law that guarantees trajectory tracking performance for the control problem of a nonlinear multi-input multi-output Mecanum wheel omnidirectional mobile robot, which has high control accuracy and strong robustness and anti-interference.

The application discloses a workshop constant temperature and humidity control method and system based on ultrasonic cold atomization, and belongs to the technical field of industrial environment control. In view of the defects of high energy consumption, heat interference, control lag and too tight coupling with a production system of a steam humidification mode in the prior art, the method comprises the following steps: obtaining real-time humidity of a workshop, and generating a standard industrial simulation control signal by an air conditioner main control unit; the signal is converted into a driving signal through an independently arranged signal conversion control module, and normal-temperature atomized water vapor output by an ultrasonic cold atomization humidification device is controlled, so that the original steam humidification device is completely replaced. The system also has a manual control mode and a state display function, and can realize decoupling of humidification and a boiler, so that the boiler is completely stopped when a production line is shut down. The application replaces fossil fuels with electric energy, saves energy and reduces cost, eliminates heat interference and improves temperature control accuracy, and can be seamlessly integrated without modifying the original PLC program, thereby supporting lean energy management.

This invention discloses a system and control method for enhancing the variable load capacity of coal-fired power units through integrated molten salt energy storage. The system comprises a coal-fired power unit and a molten salt energy storage system. The molten salt energy storage system heats feedwater after steam preheating, and the resulting superheated steam is injected into the intermediate-pressure cylinder to perform work. The corresponding control method is as follows: First, determine the load commands for the coal-fired power unit and the molten salt energy storage system; second, formulate a control strategy for the molten salt energy storage system; next, determine the key parameter setpoints for the integrated molten salt energy storage system to enhance the variable load capacity of the coal-fired power unit; then, calculate the superheated steam flow setpoint for the molten salt energy storage system; finally, iteratively determine the PID controller parameters under optimal conditions. This control method is compatible with the existing control system of the coal-fired power unit, reduces the system's computational complexity and retrofitting costs, and significantly improves variable load capacity and operational control quality.

The utility model belongs to the technical field of special equipment for ceramic capacitor manufacturing, specifically relates to a heating system for green porcelain belt preparation. The heating system for green porcelain belt preparation, including heating chamber, silicon rubber heating plate and hot -blast heating mechanism, load film carries ceramic slurry and can enter from the feed port of one end of heating chamber, leave from the discharge port of the other end, silicon rubber heating plate is fixedly arranged in the heating chamber, and the load film is located above the silicon rubber heating plate when running, the hot -blast heating mechanism is used for introducing the outside air, forms hot -blast after heating and makes hot -blast blow into the heating chamber in the way of parallel to the load film running direction and countercurrent to the load film running direction, and the ceramic slurry on the load film is dried. The utility model has the advantages of low cost, small temperature difference in the width direction of film and high safety.

A double-pulse differential back-blowing flue gas sampling device and method, which is composed of alternating back-blowing sampling cycles and non-back-blowing sampling cycles. The periodic sampler operates continuously, and the flue gas is sucked in from the inner tube inlet and discharged from the sampler outlet. In the non-back-blowing cycle, the back-blowing pulse valve and the back-suction pulse valve are both closed. The flue gas enters the inner cavity from the outer surface of the smoke filter and then enters the inner tube inlet after being collected. The back-blowing pulse valve is opened and lasts for ΔT1 time, and the gas in the back-blowing preheating tube enters the inner cavity of the smoke filter. The dust accumulated on the outer surface of the smoke filter is back-blown, and the gas entering the inner tube inlet is the flue gas in the inner cavity. At the end of ΔT1, the back-suction pulse valve is opened and lasts for ΔT2 time, and the gas in the inner cavity flows to the vacuum tank, and the flue gas enters the inner cavity through the smoke filter. The present invention can achieve uninterrupted sampling during back-blowing, and realize truly continuous flue gas sampling, which provides conditions for improving the level of environmental monitoring and the control quality of environmental protection devices.

The utility model provides a vehicle logo detecting, screening, marking and stacking integrated device which is characterized in that all the devices are installed on the periphery of a working table top, a laser marking machine is installed behind the working table top, and a module is installed on the surface of the working table top; the servo motor is installed at one end of the module, the first lifting air cylinder and the second lifting air cylinder are installed on the front side of the module, and the vacuum suction cup is installed below the first lifting air cylinder and the second lifting air cylinder. The lifting unit is mounted below the working table; the stacking unit is mounted below the working table; the photoelectric switch is mounted on the surface of the working table, and the detection station is mounted on the surface of the working table; the camera is mounted on the surface of the working table; through mutual cooperation of all the structures, visual inspection, laser marking, automatic distinguishing of defective products and automatic stacking are integrated, the manual error probability is greatly reduced, and the product error date is tracked in time.

The utility model provides a kind of alkali method bromine extraction system for air blow-out method, through acidification oxidation-blow out-multistage absorption-absorption liquid cascade configuration circulation-distillation bromine extraction whole process cooperation, constructs the closed loop bromine extraction system of " bromine ion directional conversion→brim gas grading enrichment→absorption liquid gradient utilization→bromine precise purification". With at least two levels of series absorption tower to match independent absorption liquid pool, realize alkali liquid cascade configuration and absorption liquid reverse flow, adapt to different seawater bromine content and working condition, reduce alkali consumption and tail gas bromine loss;Each unit of whole process is accurately connected, both improve the conversion efficiency of bromine oxidation, absorption, distillation, also ensure the purity of bromine through multistage purification, solve the problem of low traditional bromine extraction yield, high energy consumption, poor adaptability, provide efficient, energy saving, quality controllable system scheme for large-scale seawater bromine extraction, achieve the collaborative optimization of bromine extraction efficiency, resource utilization, product quality.

The utility model relates to the technical field of quartz crucible production, in particular to a quartz crucible forming rod which comprises a hollow forming rod body, the forming rod body is provided with an outline matched with a quartz crucible and comprises a bottom end and a top end, and a plurality of positioning grooves are formed in the bottom end of the forming rod body; the forming rod tip is movably arranged at the bottom end of the forming rod body, one end of the forming rod tip is located in the bottom end of the forming rod body and can be selectively clamped into any one of the multiple positioning grooves, and the other end of the forming rod tip is located outside the bottom end of the forming rod body so that the forming rod body can be positioned at different positions. The forming rod can be positioned at different positions by adjusting the tip of the forming rod so as to be matched with different thicknesses of the inner-layer quartz sand and the outer-layer quartz sand during preparation of the quartz crucible, so that frequent replacement of the forming rod is avoided, and the operation process is simplified.

This invention discloses an online identification method for key parameters of a magnetically driven rotor for twin control. The method includes: constructing a parameterized digital twin model of the magnetically driven rotor, defining the time-varying key internal parameters in the model as parameter vectors to be identified; defining an objective function within a set time window, transforming the parameter identification problem into a nonlinear optimization problem that minimizes the objective function; adaptively identifying system parameters based on the LM optimization method to obtain parameter update vectors; passing the parameter update vectors to the system matrix of the parameterized digital twin model for state prediction at the next time step, and outputting the parameter update vectors to complete the online identification of key parameters. This invention effectively improves the accuracy, real-time performance, and embedded platform adaptability of parameter identification, providing a reliable model foundation for high-precision control, performance degradation monitoring, and predictive maintenance of magnetically driven rotors.

This invention discloses a path planning method for a robotic arm platform, a robotic arm platform, and a storage medium, relating to the field of robotic arm path planning technology, and is invented to improve path planning accuracy. The method involves acquiring the current pose of the robotic arm platform, current environmental information, and the target arrival point. An initial obstacle avoidance path is generated using a gradient descent method with the adversarial potential field as parameters, taking the current environmental information and the target arrival point as parameters. This initial obstacle avoidance path is then smoothed using a filtering algorithm to obtain a smoothed obstacle avoidance path. The dynamic model of the robotic arm platform is used as a constraint, and an iterative optimization of the smoothed obstacle avoidance path is performed using a target value function with tracking error penalty, smoothness penalty, and energy consumption penalty as parameters, resulting in the planned path for the robotic arm platform after the target value function converges. This invention is used for robotic arm path planning.

The invention relates to the technical field of plastic part processing, in particular to a plastic part demoulding and transferring device with a guide mechanism, which comprises a transferring rack consisting of a plurality of module racks. Modular design and flexible arrangement can be achieved, the length of the transfer rack can be conveniently adjusted according to production requirements, a motor drives a transfer driving block to drive along a transfer tooth groove, efficient transfer of plastic parts is achieved, through meshing transmission of a driving gear and a control gear, the periphery of the plastic parts can be effectively sealed, a sealed cavity is formed, and the service life of the plastic parts is prolonged. The plastic parts in the sealed cavity are dried and cooled, so that the plastic parts are prevented from being polluted by the outside in the transferring process, the cooling effect in the transferring process is improved, high-quality forming and good storage conditions of the plastic parts are ensured, automatic and intelligent operation of the whole process from demolding to transferring is achieved, and the production efficiency is improved. And the production efficiency and the quality control are obviously improved.

The utility model discloses a flange angle iron processing device, which belongs to the technical field of flange processing, and comprises a machine table, one side of the machine table is sequentially provided with a feeding guide device, a processing machine head and a discharging guide device from left to right, the machining machine head comprises a machine head installation frame, the included angle between the machine head installation frame and the horizontal plane is 45 degrees, a set of positioning installation plates are arranged in the center of the machine head installation frame, and a set of L-shaped positioning grooves are formed in the positioning installation plates. According to the technical scheme, the complete machining process of feeding, machining and discharging can be automatically completed, the machining efficiency is greatly improved, manpower and material resources are saved, angle iron profiles are limited, positioned and fixed in the machining process, the quality of the angle iron profiles punched through the punching machine head and machined and formed is stable and controllable, and the good using effect is achieved.

The utility model discloses a kind of electric heating wire lengthening device, linear guide is provided on base, first fixed seat, second fixed seat are connected with guide rail, and the initial position of both is interval arrangement, electric heating wire is located between first fixed seat, second fixed seat, and the both ends of electric heating wire are respectively positioned and connected with first fixed seat, second fixed seat, first fixed seat, second fixed seat are respectively connected with a driving source, and driving source drives first fixed seat, second fixed seat moves along guide rail opposite to lengthen electric heating wire. By first fixed seat, second fixed seat positioning and connecting electric heating wire, and first fixed seat, second fixed seat linearly stretch electric heating wire, to keep lengthening electric heating wire, first fixed seat, second fixed seat are driven by different driving sources respectively, by the same speed, rate, stroke design of both, to keep evenly stretching electric heating wire, lengthening device is suitable for electric heating wire of different original length, and is suitable for different lengthening length.

This invention relates to the field of traditional Chinese medicine preparation technology, specifically to a Qi-invigorating and blood-activating granule for heart pain and its preparation method, comprising the following raw materials in parts by weight: 25-35 parts of raw Astragalus membranaceus, 10-20 parts of Angelica sinensis, 5-15 parts of ginseng, 4-8 parts of Panax notoginseng, 10-20 parts of Ligusticum chuanxiong, 8-12 parts of earthworm, and 2-4 parts of leech. This invention precisely targets the core pathogenesis of Qi deficiency and blood stasis syndrome, which is "Qi deficiency as the root and blood stasis as the manifestation," selecting raw Astragalus membranaceus and ginseng as the core Qi-invigorating components, and Panax notoginseng, leech, Ligusticum chuanxiong, Angelica sinensis, and earthworm as the core blood-activating components. The formulation follows the traditional Chinese medicine principle of "invigorating Qi to promote blood circulation without harming the body's vital energy." The dosage of each raw material has been optimized through systematic experiments to form a specific range of parts by weight, solving the technical problems of poor targeting and insufficient synergy in existing formulations.

This invention relates to the field of electrolysis process control technology, and particularly to a method and system for preventing over-temperature control of the deaerator in a water electrolysis hydrogen production purification system. The method includes: acquiring monitoring data of the electrolyzer's operating status and oxygen content monitoring data at the deaerator inlet; performing logical judgment calculations on the electrolyzer's operating status monitoring data based on a preset set of disturbance parameter thresholds to obtain a feedforward control signal; performing deviation calculations and feedback control algorithm calculations on the oxygen content monitoring data based on a preset first oxygen content threshold to obtain a feedback control signal related to the preset threshold; and performing control logic operations based on the feedforward and feedback control signals to generate control commands. This approach solves the technical problem of response lag in existing deaerator temperature control technologies, improving the control quality, equipment safety, and operational reliability of alkaline water electrolysis hydrogen production systems under complex operating conditions.

The invention relates to the technical field of active noise control, in particular to a sound quality active control variable step size method based on auditory time coherence. The method comprises the following steps: firstly, initializing, and clearing all buffer areas and counting units; then, generating a preset estimation response signal from the preset signal through the estimation secondary path; then, the content of the buffer area is updated, the oldest data is removed, newest noise and error signal data are added, meanwhile, cyclic shift is carried out on a preset signal and an estimation response thereof, and a counting unit value is increased. Then, the noise passes through a filter to obtain a filter output, and the filter output and a preset signal are added to form a control output. And when the counting reaches a specified number of times, calculating auditory time coherence by using the error signal and the preset estimation response, adjusting a step length factor according to the auditory time coherence, then subtracting the error signal from the preset estimation response signal to obtain a residual signal, and finally updating the weight of the filter by using a new step length factor and the residual signal. According to the method, the step length is dynamically adjusted through hearing time coherence between the error signal and the preset estimation response signal from hearing subjective feeling of people, so that the error signal is gradually close to the preset estimation response signal. Different from a traditional method for pursuing the minimum sound energy, the method enables the quality of the processed sound to be controllable by controlling the error signal to approach the preset signal.