360 results about "Impact noise" patented technology

Disclosed are methods, devices, and systems for improved sports paddles that alter and / or reduce impact noise or the perceived level(s) thereof. Such paddles may be used for racquet sports, with the paddle including a handle and a body with a core layer, one or more inner layers and a top layer, wherein the density, compressibility / elasticity, thickness, segmentation, and / or shape of the materials used to form the various layers and / or openings / voids formed therein can be selected and designed to provide a paddle having desired playing characteristics and sound altering properties.

The invention relates to the technical field of voice interaction, particularly discloses an AI intelligent robot voice interaction method and system, and aims to solve the problems of low voice interaction accuracy, insufficient reliability and lack of authority control in a complex noise environment. A dynamic noise feature library containing steady-state noise, impact noise and human voice interference features and a pre-stored gesture instruction library are constructed, audio signals are collected in real time, low-frequency-band, middle-frequency-band and high-frequency-band differential noise reduction is executed, Mel-frequency cepstral coefficient features are extracted, noise scenes are matched, corresponding voice recognition models are switched, and voice recognition is achieved. And calculating a confidence value of the voice instruction, outputting multi-modal verification data in combination with a dynamic confidence threshold, and outputting an authority control signal through voiceprint matching, authority verification and instruction consistency judgment. Through multi-modal fusion, dynamic adaptation and authority control, the voice recognition accuracy and interaction safety in a complex noise environment are remarkably improved, and the method is suitable for scenes such as factory intelligent inspection.

The invention discloses a wind turbine generator anti-impact noise fault identification method based on feature embedding deep learning, and the method comprises the steps: carrying out the feature mode decomposition of an original vibration signal of a wind turbine generator, screening out an optimal mode component, and converting a time domain signal of the optimal mode component into an envelope spectrum; using the minimum envelope entropy as a fitness function, and using a sparrow search algorithm to globally optimize the filter length and the decomposition modal number of characteristic modal decomposition; and extracting time-frequency domain features, constructing a multi-dimensional time-frequency domain feature vector, inputting the multi-dimensional time-frequency domain feature vector into the combined fault recognition model, and outputting a fault classification result. According to the method, on the basis of an FMD and SSA-MEE joint optimization framework, the sensitivity limitation of a traditional envelope demodulation method on impact noise is broken through, modal aliasing is restrained, and noise robustness is enhanced. According to the method, the vibration signals are subjected to characteristic mode decomposition, the influence of early impact noise is inhibited, a CNN-GRU-Attention fault recognition model is provided, and the accuracy of fault recognition is greatly improved.

The utility model relates to the field of electromagnetic valves, and discloses a mute electromagnetic valve. The mute electromagnetic valve comprises a framework provided with a cavity, a coil is arranged on the peripheral wall of the framework, a movable iron core and a static iron core are coaxially arranged in the cavity, a mute pad is arranged at the end, facing the movable iron core, of the static iron core in a sleeved mode, a protruding ring is arranged at the end, facing the movable iron core, of the mute pad, and when the movable iron core and the static iron core attract each other, the movable iron core and the static iron core attract each other. Through the design that the annular end face of the convex ring abuts against the end face of the movable iron core, the impact contact area generated when the movable iron core and the static iron core are attracted is reduced, and the impact noise generated when the movable iron core and the static iron core are attracted can be effectively reduced.

Provided is a bathing assistance device for an infant, wherein the infant's resistance due to the strong impact noise generated when using a conventional bathing aid can be eliminated, armrests can operate smoothly, the skin of the infant can be prevented from being caught or compressed in a gap between the upper body and the armrests, by making a play means removable, the infant can replace the play means with his / her preferred safe play means or purchase only the bathing assistance device separately, foreign substances such as washing water and feces which flow into the inside of a tread can be quickly discharged, the bathing assistance device can be easily stored and dried in a bathroom, a falling accident in which the infant slips and falls on an upper portion of a lower body part can be prevented.

The invention discloses a rock mass fracture early warning method for a hydraulic tunnel, belongs to the technical field of tunnel safety monitoring, and can solve the problem that an existing method cannot specifically recognize isolated impact noise and rock mass real fracture signals in the construction period of the hydraulic tunnel under the background of strong noise. The method comprises the following steps: S1, acquiring an original micro-seismic signal synchronously acquired by a sensor array in a hydraulic tunnel; s2, detecting a micro-seismic event from the original micro-seismic signal to obtain an event signal set, and determining a reference channel signal according to the event signal set; s3, extracting cross correlation coefficient peak values of event signals of each channel in the event signal set and reference channel signals, and counting the number of channels of which the cross correlation coefficient peak values exceed a cross correlation coefficient threshold value as the number of coherent channels; and S4, calculating a frequency band energy ratio of the reference channel signal, and generating a rock mass fracture early warning signal when the number of coherent channels and the frequency band energy ratio meet preset conditions. The method is used for rock mass fracture early warning of the hydraulic tunnel.

The present invention relates to a prevention device that is installed on a door frame of an opening / closing door to prevent sudden closing of the opening / closing door, and more particularly, to an impact noise prevention device for an opening / closing door which is configured to install wings on one side of a hinge fixed to the door frame, allows the wings to rotate around the hinge by the force of the wind passing between the opening / closing door and the door frame, i.e. the wind force, thereby reducing the impact and noise caused by the sudden closing of the opening / closing door, and is installed in the door frame to conveniently perform its installment and removal.

The invention discloses a noise reduction washing machine drainage pump and a noise reduction method thereof. The noise reduction washing machine drainage pump comprises a drainage motor, a pump body assembly and an axial plunger type emptier, a water inlet pipe, a water inlet cavity, the edge of a push-pull disc, a water passing hole and a drainage cavity, and a full-load drainage path is formed by an opened flexible one-way valve I, the drainage pipe and a drainage pipeline; the drainage pipeline, the pipe IV, the connecting pipe I, the pipe II and the water inlet cavity form a backflow water path; the edge of the push-pull disc, one side of the baffle, the pipe II, the connecting pipe I, the pipe IV and the drainage pipeline form an exhaust path; an internal circulation drainage path is formed by the drainage cavity, the drainage pipe, the pipe III, the connecting pipe II, the opened flexible one-way valve II, the water inlet cavity, the water passing hole and the drainage cavity, and the noise reduction washing machine drainage pump adopting the four paths aims at impact noise of residual water in a drainage pipeline and roar of air in a cavity of the pump body assembly in the prior art. The two kinds of noise in the prior art are effectively eliminated or reduced through the steps in the noise reduction method.

The application belongs to the technical field of magnetocardiogram signal processing, and particularly relates to a method, device and medium for removing impact noise of multi-channel magnetocardiogram signals, comprising the following steps: S10, acquiring multi-channel magnetocardiogram signals collected by a magnetocardiograph; S20, based on the multi-channel magnetocardiogram signals, modeling the spatial relationship between channels by using a graph method, fitting the spatial distribution of the multi-channel magnetocardiogram signals containing noise signals by using a symmetric alpha stable distribution model, and obtaining a graph signal representation of the noisy magnetocardiogram signals; S30, constructing an lp regularization target function based on the graph signal representation, optimizing and solving the target function by using an iteratively reweighted least squares method, and obtaining the denoised magnetocardiogram signals. The method can remove the impact noise of individual channels in the multi-channel magnetocardiogram signals, and improve the signal-to-noise ratio of the magnetocardiogram signals; and the spatial denoising is helpful to improve the signal-to-noise ratio while completely retaining the time domain characteristics of the signals, and has no requirement for the number of time domain samples, and the detection efficiency is higher.

The invention discloses a door lock mechanism and a vehicle, the door lock mechanism comprises a shell, a ratchet wheel and a pawl, the pawl comprises a floating support and a floating claw, and when the door lock mechanism is switched from an unlocking state to an upward locking state, the ratchet wheel pushes the floating claw to rotate relative to the floating support; when the door lock mechanism is switched from the locking state to the unlocking state, the floating claw is pushed by the floating support to rotate synchronously with the floating support, and the ratchet wheel rotates along with rotation of the floating claw. When the door lock mechanism is switched from the unlocking state to the locking state, the floating claw independently rotates relative to the shell, the floating support is kept fixed relative to the shell, only the floating claw impacts the ratchet wheel, and the mass and rotational inertia of the floating claw are small, so that the impact inertia and impact energy when the pawl impacts the ratchet wheel can be reduced, and vibration and impact abnormal sound are further reduced.

The invention provides a blade structure, an axial flow blade, an axial flow fan and an air conditioner, the blade structure comprises a blade body, the blade body comprises a front edge, a suction surface, a tail edge and a pressure surface which are sequentially connected end to end, the pressure surface and the suction surface respectively extend between the front edge and the tail edge, in the airflow flowing direction, the front edge or the pressure surface is provided with a leading-in hole, and the leading-in hole is communicated with the suction surface. A leading-out hole is formed in the tail edge or the suction surface; a silencing cavity is formed in the blade body, the guide-in hole and the guide-out hole communicate with the silencing cavity, the guide-in hole guides airflow into the silencing cavity, and the guide-out hole guides the airflow in the silencing cavity out of the blade body. The leading-in holes reduce impact noise of airflow to the front edge, and the leading-out holes reduce noise of the trailing edge by changing the flowing state of the airflow at the trailing edge.

The utility model discloses a shock absorption and noise reduction structure of a pedal simulator, which comprises an upper cover and a lower cover which are connected in an up-down sliding manner, and a bulge is arranged in the upper cover. The plug body assembly is arranged in a containing cavity formed by the upper cover and the lower cover and can move along the shaft, and the friction block is installed on the plug body assembly and abuts against the position between the inner side wall of the upper cover and the plug body assembly. The elastic assembly comprises a first elastic part and a second elastic part which are arranged on the upper side and the lower side of the plug body assembly respectively. During braking, the lower cover moves downwards, and the protrusions abut against the plug body assembly to absorb shock and reduce noise. A buffering gasket is arranged in the plug body assembly, and a buffering part is pressed into the plug column in an interference mode through a T-shaped rubber part or integrally formed with the plug column in an injection mode. According to the structure, impact noise generated by direct contact of the upper cover and the piston during rapid treading is effectively reduced, the driving comfort is improved, rigid collision of parts is reduced, and the service life of equipment is prolonged.

The invention relates to the technical field of underwater noise simulation, and discloses an array system for simulating ship noise based on a gas explosion sound source, which comprises a unit console, a display console, an air compressor unit, a valve control box, a gas cylinder group, a comprehensive controller, a gas explosion sound source array and a ship power station, and is characterized in that the ship power station provides power for the air compressor unit and the comprehensive controller; the unit console is used for controlling the air compressor unit, and the display console is used for performing interface display and operation parameter setting on the comprehensive controller; the air compressor unit receives a control signal of the unit console and generates compressed air flowing to the valve control box; the valve control box receives a control instruction of the comprehensive control instrument and conveys compressed gas to the gas explosion sound source array through the gas cylinder set. The gas explosion sound source array further receives a control signal of the comprehensive control instrument and works according to the control signal. According to the invention, the impact noise of the ship engine can be simulated underwater, and the purpose of simulating the real working process of the ship diesel engine is achieved.

The invention relates to the technical field of fluid mechanical fault diagnosis, and discloses an emulsion pump fault intelligent diagnosis method and system based on multi-dimensional entropy feature fusion, and the method comprises the steps: constructing a multi-dimensional physical field state monitoring space, and synchronously collecting vibration acceleration, outlet pressure and flow time sequence signals; the method comprises the following steps: performing adaptive variational mode decomposition and effective sensitive component screening reconstruction on a vibration signal, calculating a normalized vibration quantile permutation entropy through phase-space reconstruction and quantile mapping, extracting a pressure fluctuation entropy and a flow pulsation variance, fusing the pressure fluctuation entropy and the flow pulsation variance into a multidimensional fault feature vector, inputting the multidimensional fault feature vector into a multi-classification support vector machine, and outputting an operation state label; executing hierarchical closed-loop control; according to the method, through quantile mapping and multi-physics field fusion, the problems of entropy value feature distortion and liquid-machine coupling weak fault feature masking caused by non-Gaussian impact noise are effectively solved, and the fault diagnosis robustness and accuracy of the emulsion pump under complex working conditions are improved.

The air spring strut assembly comprises a shock absorber, a plane bearing, an upper antifriction ring, a lower antifriction ring, an air seal and a locking nut, the plane bearing is arranged between the top face of a cylinder body of the shock absorber and a fluctuating piston on the air spring, the upper antifriction ring is arranged between the side face of the top of the cylinder body of the shock absorber and the fluctuating piston on the air spring, and the lower antifriction ring is arranged between the side face of the top of the cylinder body of the shock absorber and the fluctuating piston on the air spring. A lower antifriction ring is arranged between the bottom of a fluctuating piston on the air spring and the side face of the cylinder body, and an air seal is arranged between a piston rod of the shock absorber and the fluctuating piston on the air spring and locked through a locking nut. The invention has the advantages that under the action of the plane bearing, the upper antifriction ring and the lower antifriction ring, the cylinder body of the shock absorber can rotate on the fluctuating piston and compensate the torsion, so that the torsion applied to the fluctuating piston by the cylinder body is greatly reduced, the torsion to the bag skin is reduced, the impact abnormal sound of the bag skin is reduced, and the service life of the bag skin is prolonged. And abnormal stress of the leather bag can be reduced, and the service life of the air spring is prolonged.

The utility model belongs to the technical field of hydraulic control, and particularly relates to a hydraulic power unit of a lifting platform, which comprises a motor, a hydraulic gear pump, an oil tank, an oil path block, a two-position four-way valve, a three-position four-way valve, two overflow valves, a first oil pipe, a second oil pipe and a third oil pipe. The first oil pipe is connected with the hydraulic gear pump and communicated with the oil path block, the second oil pipe and the third oil pipe are both fixed to the oil path block and communicated with the oil path block, the two-position four-way valve, the three-position four-way valve and the overflow valve are all detachably connected with the oil path block, the motor is fixed to the oil path block, and the output end of the motor is connected with the hydraulic gear pump; compared with the prior art, the two-position four-way valve, the three-position four-way valve and the two overflow valves are matched with the oil path block to realize the control valve control throttling overflow system, so that the efficiency of a hydraulic power unit is greatly improved, the energy-saving effect is also remarkably improved, and the impact noise caused by the hydraulic power unit is also greatly reduced.

The invention provides an electric vehicle motor control method and device, a motor controller and a vehicle, and the method comprises the steps: determining whether a current state is an active tooth leaning state or not according to a vehicle gear, a currently collected motor rotating speed, a preset rotating speed range corresponding to the vehicle gear, a request torque and a preset torque range corresponding to the vehicle gear; the request torque is the torque in a torque control instruction sent by the vehicle control unit; if the current state is the active tooth leaning state, a motor is controlled to output preset torque; and if the current state is not the active tooth leaning state, the motor is controlled to output the request torque. It can be understood that the active tooth leaning state corresponds to the state that the vehicle possibly has the tooth knocking working condition, and when the vehicle state is the active tooth leaning state, the motor is controlled to output the preset torque to ensure that the vehicle outputs the relatively fixed torque, so that tooth surface impact noise is avoided, the NVH performance of the electric vehicle under the low-speed working condition is improved, and the user experience feeling is improved.

The invention discloses a passenger vehicle cement sculptured pavement interior noise test method, which comprises the steps of setting a pavement test condition of passenger vehicle interior noise based on a cement sculptured pavement, the pavement test condition comprising a preset vehicle speed and test time; noise information and vehicle speed information in the cabin are collected according to the road surface test working condition; setting a noise sampling frequency, and carrying out sampling processing on noise information to obtain a processed time domain signal; fourier transform is carried out on the time domain signal, a frequency domain signal of a noise spectrum is obtained, an in-vehicle sound pressure value noise spectrum curve is generated, and objective evaluation is carried out on the size of the in-vehicle sound pressure value; the time domain signal is processed to obtain sharpness, and the sharpness is objectively evaluated; according to the method, the test analysis and evaluation method of the impact noise is defined, and aiming at the complaint problem possibly existing in a customer, the real passenger car tire is adjusted through a tested objective data result in the whole car development process, so that the squeal noise is optimized, and the NVH quality of the whole car is improved.

The invention discloses a brake locking device and a brake caliper assembly, and belongs to the technical field of automobile brake systems, the brake locking device comprises an MGU shell, a transmission gear mechanism arranged on the MGU shell and a locking component used for locking the transmission gear mechanism for parking, a mounting cavity used for containing the locking component is formed in the MGU shell, and the MGU shell is internally provided with a brake caliper. The anti-collision device has the beneficial effects that radial impact is effectively reduced, meanwhile, impact noise can be effectively reduced, the strength and the impact resistance of the locking component are enhanced, heat in the locking component can be transmitted out in time, and therefore the anti-collision device has the advantages of being good in anti-collision performance, good in anti-collision performance, good in anti-collision performance, good in anti-collision performance, good in anti-collision performance, good in anti-collision performance, good in anti-collision performance, good in anti-collision performance and good in anti-collision performance. And the service life of the locking device is prolonged.

The invention relates to the technical field of artificial intelligence, and discloses a BCM module cooperative control method based on voice instruction recognition in a vehicle-mounted high-noise environment, and the method comprises the following steps: collecting original voice instruction data and vehicle state parameter data in the vehicle-mounted high-noise environment; performing voice signal preprocessing in a noise environment based on the original voice instruction data to generate de-noised voice instruction data; according to the method, the engine noise and the wind noise steady-state background noise are filtered out through multi-level noise suppression processing combining adaptive filtering and spectral subtraction, residual noise elimination is carried out for sudden impact noise, and the definition of voice signals is improved. Meanwhile, through a voice activity detection algorithm, a detection threshold is dynamically adjusted according to vehicle state parameters, an effective voice segment and a noise segment can be separated, the accuracy of voice feature extraction in a complex time-varying noise environment is ensured, and thus the robustness and reliability of voice instruction recognition are improved.

The utility model discloses a speed limiter steel wire rope anti-shaking device for an elevator. A speed limiter steel wire rope is provided with a first linear section close to a lift car guide rail and a second linear section away from the lift car guide rail. The anti-shaking device comprises a fixing support, a connecting support and a U-shaped piece. The fixed bracket is arranged on a car guide rail; the connecting support is arranged on the fixing support and stretches across the first linear section and the second linear section. The connecting support is provided with a first buffer pad facing the first linear section. The two free ends of the U-shaped piece are connected with the connecting support, and a limiting space is formed between the U-shaped piece and the connecting support. The second linear section is accommodated in the limiting space; the U-shaped piece is sleeved with a buffering sleeve. And a second buffer pad is arranged on the side surface, facing the limiting space, of the connecting bracket. According to the utility model, the shaking of the speed governor steel wire rope on the non-safety tongs lifting side can be limited, the collision noise can be reduced, and the shaking of the speed governor steel wire rope on the safety tongs lifting side can be limited, and the collision noise can be reduced.

This utility model relates to the field of automotive engine manufacturing technology and discloses a sprocket for an automotive engine. It includes a sprocket body with a motor shaft at its center for rotating the sprocket body. Two limiting blocks are fixedly connected to the inner wall of the sprocket body near the motor shaft, and the sprocket body is tightly connected to the protrusions on the outer surface of the motor shaft via the two limiting blocks. An anti-loosening component is provided on one side of the sprocket body to prevent the motor shaft from loosening, and the anti-loosening component is sleeved on the outside of the motor shaft. In this utility model, the chain teeth mesh with the engine chain, and the top arc-shaped protrusion fully engages with the chain rollers, improving meshing accuracy, reducing impact noise, and restraining the chain to prevent derailment. The oblique grooves between adjacent chain teeth guide the flow of lubricating oil during operation, improving tooth surface lubrication and assisting in heat dissipation. The anti-loosening component effectively inhibits the loosening of the motor shaft, ensuring transmission stability.

The invention discloses a rotor type automobile air conditioner compressor which does not generate impact noise. Comprising a pump body, the pump body comprises a front end plate, a rotor, a cylinder body, a rear end plate and a plurality of blades, the rotor comprises a rotating shaft and a rotating body, major-arc-shaped mounting holes corresponding to the blades are formed in the inner wall of the cylinder body, strip-shaped rotor grooves corresponding to the blades are formed in the rotating body in the radial direction, and major-arc-shaped hinge joints are arranged on the outer sides of the blades. Hinge joints on the outer sides of the blades are hinged into mounting holes in the cylinder body, and the inner sides of the blades are arranged in rotor grooves in the rotating body in a sliding fit mode. The inner sides of the blades are dovetail-shaped, the two ends of the inner sides of the blades are rounded, and in the process that the blades pull the cylinder body to rotate, the two ends of the inner sides of the blades are kept in contact with the two groove walls of the rotor groove; the notch of the rotor groove is chamfered, the thickness of the outer side of the blade is smaller than that of the inner side of the blade, concave-arc-shaped receding structures are arranged on the two side faces of the blade, and in the process that the blade swings around the hinge joint, the receding structures on the two side faces of the blade and the notch of the rotor groove are matched for receding.

This application discloses a novel noise reduction structure for a pressure cooker, comprising: a noise reduction seat with openings at both the top and bottom, and a noise reduction cover that can be opened and closed and is disposed above the noise reduction seat. The noise reduction seat and the noise reduction cover are fitted together to form a receiving cavity covering the pressure vent cap. The noise reduction cover has a vent hole, and the inner sidewall of the noise reduction cover protrudes towards the receiving cavity corresponding to the position of the vent cap, forming a reflux wall. This embodiment, through the enveloping receiving cavity formed by the noise reduction seat and the noise reduction cover, completely covers the pressure vent cap within a closed space, forming a physical barrier layer to directly weaken noise propagation. Simultaneously, the reflux wall forces steam to swirl downwards, reducing steam velocity and impact energy before it is discharged outwards through the vent hole. This dual effect attenuates high-frequency impact noise by over 40%, and the compact integrated structure avoids the volume defects of traditional screw-on devices.

The invention provides an intelligent denoising processing method for signals of an ocean multi-parameter precision measuring instrument, and belongs to the technical field of intelligent denoising processing for the signals of the ocean multi-parameter precision measuring instrument. Noise sub-bands are eliminated according to sub-band signal-to-noise ratio evaluation indexes, signals are reconstructed, a weighted undirected graph is constructed according to partial correlation coefficients among sensors, and joint sparse optimization with physical smoothness constraint is executed in an atlas domain; and finally, multi-channel parallel denoising and time sequence alignment output are realized through a work stealing scheduling strategy. The technical problem that full-band adaptive decomposition, physical priori constraint drift compensation, impact noise accurate separation and multichannel physical consistency collaborative optimization cannot be simultaneously realized in a complex marine environment in a multichannel sensor signal denoising process is solved.

The invention discloses a direct-acting electromagnetic valve, and belongs to the technical field of vehicle suspension systems. The electromagnetic valve comprises a valve body assembly, a static magnetic assembly, a valve seat assembly, a movable magnetic assembly and an electromagnetic driving assembly. The key point is that a damping limiting structure is arranged between the peripheral side of the moving magnetic assembly and the inner wall of the valve body assembly. When the electromagnetic valve is powered on and opened, and the movable magnetic assembly moves to the maximum opening position, the damping limiting structure bears the impact force and limits the displacement of the movable magnetic assembly, so that a preset magnetic isolation gap is always kept between the second end of the movable magnetic assembly and the static magnetic assembly. Through non-contact limiting, metal impact noise is eliminated; by means of the constant magnetic isolation gap, long-term stability of electromagnetic force is guaranteed, and the problems that in the prior art, noise is large, the electromagnetic force is attenuated, sealing is poor, and the stroke is not stable are systematically solved.

The invention relates to the field of dust removal equipment, and discloses unpowered dust removal equipment for reducing the fall height of raw materials, the unpowered dust removal equipment comprises a chute plate, a material receiving plate is fixedly arranged at the upper end of the chute plate, and a plurality of spacers are arranged on the inner walls of the material receiving plate and the chute plate. The actual falling fall height of raw materials is reduced from the source, unpowered speed reduction, dust removal and noise reduction effects are achieved, the raw materials are guided and gathered after falling to the obliquely-arranged material receiving plate, and when the raw materials slide down along the material receiving plate and the chute plate, the raw materials are gradually blocked and decelerated through the special-shaped annular spacers arranged on the inner wall at equal intervals, the sliding speed is reduced, and no external power exists in the whole process; dust generated by impact and friction of raw materials can be reduced from the source, and meanwhile impact noise can be weakened.

The application relates to the technical field of artificial intelligence, and discloses a BCM module cooperative control method based on voice instruction recognition in a vehicle high-noise environment, which comprises the following steps: collecting original voice instruction data and vehicle state parameter data in the vehicle high-noise environment; performing voice signal preprocessing in the noise environment based on the original voice instruction data to generate denoised voice instruction data; through multi-level noise suppression processing combining adaptive filtering and spectral subtraction, engine noise, wind noise and steady-state background noise are filtered out, and residual noise is eliminated for sudden impact noise, so that the intelligibility of the voice signal is improved. Meanwhile, through a voice activity detection algorithm, and by dynamically adjusting the detection threshold according to the vehicle state parameters, effective voice segments and noise segments can be separated, the accuracy of voice feature extraction in a complex time-varying noise environment is ensured, and the robustness and reliability of the voice instruction recognition are improved.

The invention provides a sub-array optimal distribution method and system based on a quantum antelope optimizer, and belongs to the field of array signal processing. The invention aims to solve the problem of inaccurate estimation of distributed array performance attenuation and direction of arrival due to reduction of the number of snapshots and change of interference noise under the conditions of small sampling snapshots and impact noise. According to the method, the array structure is optimized under the impact noise condition, received signals are processed by constructing an infinite norm weighted fraction low-order covariance matrix, and the method is more suitable for the environment where the number of snapshots is reduced and the impact noise is severe; a quantum optimization mechanism is introduced, and the performance and search efficiency of an original algorithm in the distributed array research direction are improved based on an evolution strategy of a quantum rotation angle and a quantum rotation door; according to the method, the direction finding accuracy of the distributed array system can be improved, and the situation that the array performance influence factors in the actual direction finding application are not considered sufficiently and the performance improvement is not large due to the fact that the directional diagram of the array serves as the optimization target can be effectively avoided.