73 results about "Noise (electronics)" patented technology

The invention belongs to the field of star flash mouse communication, and discloses a star flash mouse low-power-consumption communication system and method based on Polar code and SLE collaborative optimization, the system adopts a layered architecture design, collaborative optimization of energy efficiency and performance is realized through deep coupling of a physical layer and a link layer, and the performance of the system is improved. The core of the system is composed of three functional units including a Polar code coding module, an SLE control engine and a cross-layer optimization interface, and a complete closed-loop control system is formed. According to the invention, through deep cooperation of the Polar code and the SLE mechanism, the overall power consumption is reduced by 42.7% compared with the traditional scheme; according to the Polar code dynamic construction method based on track prediction, an ultra-low bit error rate of 10 <-5 > magnitude can still be kept in a 2.4 GHz complex interference environment, and in combination with signal-to-noise ratio self-adaptive coding parameter adjustment, it is ensured that transmission delay within 0.5 ms is always kept from a low-speed office scene to a high-speed electronic sports scene; in the aspect of engineering implementation, the method has the capability of quickly adapting to hardware platforms of different manufacturers, and a complete solution with high performance and low cost is provided for large-scale commercial use of the satellite flash technology in the consumer electronics field.

The invention is suitable for the technical field of power electronics, and provides a high-voltage amplifier control method, device and equipment, and the method comprises the steps: generating a dynamic power supply voltage rail, and extracting an error signal output by the dynamic power supply voltage rail and a target; the error signal is decomposed into at least two frequency components, and the frequency components are respectively processed by adopting a differentiated amplification strategy. The processed components are synthesized into a compensation signal, and the compensation signal is superposed with the power supply voltage rail, so that a high-fidelity final output signal is generated. According to the invention, the efficiency is improved through dynamic power supply, the residual error signal is subjected to frequency division, and a differential strategy is adopted for accurate compensation, so that various distortions and noises are effectively eliminated, and the unification of high efficiency and high precision is realized.

The invention discloses a miniaturized monolithic integration method of a geomagnetic sensor and an MCU (Microprogrammed Control Unit). The method comprises the following steps of (1) low-temperature CMOS circuit layer preparation, (2) TSV three-dimensional interconnection structure processing, (3) magnetic-core-free planar coil manufacturing, (4) low-temperature electromagnetic shielding layer integration and (5) structure release and vacuum packaging. Process conflicts and hysteresis errors introduced by ferromagnetic materials are eliminated through a non-magnetic-core design, a TSV (through silicon via) three-dimensional interconnection technology is adopted to replace traditional plane wiring, the size of the module is compressed to the millimeter level, meanwhile, a broadband electromagnetic shielding layer is integrated, and it is ensured that in a weak magnetic field (lt; and the signal-to-noise ratio in a detection scene is greater than or equal to 30dB. The low-temperature compatibility with a CMOS (complementary metal oxide semiconductor) process can be realized, the mass production feasibility needs to adapt to a standard semiconductor production line, the cost of a single chip is reduced by more than 30%, and the method is suitable for navigation equipment, consumer electronics and industrial sensing systems.

The application is suitable for the field of power electronics, and provides a high-voltage amplifier control method, device and equipment. The method generates a dynamic power supply voltage rail, and extracts an error signal of the target output. The error signal is decomposed into at least two frequency components, and is processed respectively by using differentiated amplification strategies. The processed components are combined into a compensation signal, which is superimposed with the power supply voltage rail, so as to generate a final output signal with high fidelity. The application improves the efficiency by using dynamic power supply, and at the same time, the residual error signal is divided into frequency and compensated by using differentiated strategies, so that various distortions and noises are effectively eliminated, and the unification of high efficiency and high precision is realized.

The invention relates to the technical field of biomedical signal processing and medical electronics, in particular to a blood pressure measuring method for non-invasive exercise blood pressure monitoring. The method aims to solve the technical problem of low blood pressure measurement accuracy caused by broadband noise interference and failure of a fixed parameter model in a motion state in the prior art. According to the technical scheme, the method comprises the steps that a cardiac cycle reference signal and a Korotkoff sound signal are synchronously collected, a sampling window is calculated in a self-adaptive mode by utilizing a cycle triggering feature point gating mechanism and combining a heart rate, and time domain precise interception of the signals is achieved; carrying out root mean square calculation and Savitzky-Golay filtering on the intercepted signal, and keeping waveform characteristics while denoising; constructing a multi-dimensional feature regression model containing a peak value, skewness, kurtosis and dynamic template similarity so as to accurately judge systolic pressure and diastolic pressure; an automatic recharging mechanism is triggered by monitoring signal quality, and strong interference is physically avoided. The method has the advantages of being high in anti-noise capacity, high in feature extraction robustness and accurate and reliable in measurement result.

A system for vibration reducing covers for electrical components. The system includes composite covers for electronic components of drive units to reduce vibrations and associated noise during operation of a vehicle. The cover is formed of a composite to dampen oscillations occurring as a result of vibrations from the drivetrain of the vehicle. The cover also includes a thermal pathway for transferring energy as heat from an interior of compartment containing the electronic components to an environment outside the cover. Additionally, the cover can include an electromagnetic interference and / or radio frequency interference shield to prevent interference with other electronic components on and / or nearby the vehicle during operation.

The application discloses a preparation method of a flexible active myoelectric electrode array structure and relates to the field of flexible electronics and active electrode preparation; the structure comprises: a plurality of active electrodes; the plurality of active electrodes are arranged in a horizontal-longitudinal matrix mode; each active electrode comprises: a flexible substrate and an active flexible amplification electrode arranged on the flexible substrate; the active flexible amplification electrode comprises an electrode and a common-source amplification circuit; the electrode and the common-source amplification circuit are in one-to-one correspondence; the electrode and the common-source amplification circuit are connected; the structure realizes synchronous collection of surface myoelectric signals by multiple channels, the flexible substrate enhances the wearability of the electrode, the differential structure, that is, the common-source amplification circuit can improve the interference of common-mode signals, reduce the introduction of noise, improve the signal-to-noise ratio of myoelectric signals, and reduce signal crosstalk between different channels.

Techniques pertaining to new modulation and coding scheme (MCS) levels for next-generation wireless local area networks (WLANs) are described. An apparatus generates a signal using an MCS level not defined in an Institute of Electrical and Electronics Engineers (IEEE) 802.11be specification. The apparatus then performs a wireless communication using the signal. Each of a sensitivity signal-to-noise ratio (SNR) gap and a spectral efficiency gap between two adjacent MCS levels from a combination of the plurality of MCS levels and a plurality of existing MCS levels defined in the IEEE 802.11be specification is less than that between two adjacent MCS levels from the plurality of existing MCS levels.

The invention relates to a satellite-borne fluorescence hyper-spectral detector electronics system with high integration level and high signal-to-noise ratio. A signal processing module is used for controlling the working mode of a detector; receiving a second pulse signal of a satellite GPS subsystem to generate a time count of a frame synchronization signal; carrying out extremely low noise quantization on an analog signal transmitted by the focal plane driving unit; the image data and the auxiliary data are coded and integrated and then sent to a satellite data transmission subsystem; a global clock and a global reset signal are generated and sent to the sequential control unit; the time sequence control unit generates a frame synchronization signal and a clock synchronization signal, and generates a driving time sequence signal of a CCD in the focal plane driving unit; the focal plane driving unit generates various bias voltages required by the work of the CCD; receiving a driving time sequence signal to generate various high-voltage driving signals required by the work of a CCD (Charge Coupled Device); and the CCD output analog signal is output to the signal processing unit after being subjected to power amplification and impedance matching. The signal-to-noise ratio of the system is improved, and the size, weight and power consumption of imaging electronics of the detector are reduced.

The invention discloses an active damping method combining a wave trap with an amplitude attenuator, and relates to the technical field of power electronics. The invention aims to solve the problems that an inherent harmonic peak exists in a method for suppressing switch subharmonics by adopting an LCL type filter, noise at resonant frequency can be amplified, waveform quality is influenced, tracking errors are caused to a current loop of an ultra-precision linear servo system, and the positioning precision of a linear motor is influenced. According to the active damping method combining the wave trap with the amplitude attenuator, the wave trap and the amplitude attenuator are sequentially cascaded to the output end of the inverter, so that the wave trap and the amplitude attenuator form an active damper, and active damping is achieved.

The invention belongs to the technical field of electronics, and provides a signal jitter elimination method and device based on a digital filter, and the method comprises the steps: determining a target parameter of a low-pass digital filter according to the pulse data of a signal to be subjected to jitter elimination; performing quantization processing on the signal to be subjected to jitter elimination to obtain a quantized signal; and judging the quantized signal by using a low-pass digital filter to obtain a judgment result, and determining the signal after jitter elimination according to the judgment result. According to the method and the device, the low-pass digital filter is designed according to the characteristics of the signal to be subjected to jitter elimination, burr signals in the signal can be quickly filtered out, noise jitter is reduced, a complex jitter elimination circuit does not need to be designed, and therefore the efficiency and the universality of signal jitter elimination are improved.

The invention relates to the technical field of microelectronics, and discloses a charge pump current mismatch compensation circuit and method and a phase-locked loop system, and the compensation circuit comprises a time-to-digital conversion module which is connected to a phase frequency detector of a phase-locked loop and is configured to detect the pulse width of an uplink signal and a downlink signal output by the phase frequency detector; the compensation current control module is connected with the time-to-digital conversion module and is configured to generate compensation current based on the uplink signal pulse width and the downlink signal pulse width; wherein the compensation current is configured to be input to a charge pump of the phase-locked loop so as to counteract current mismatch of the charge pump in real time. The problem that dynamic compensation cannot be achieved through static optimization in the prior art is solved, output voltage fluctuation of the loop filter is reduced, the stability and precision of the output frequency of the phase-locked loop system are improved, and meanwhile introduction of noise or limitation of the working range is avoided.

The application discloses a high-polarization-extinction-ratio integrated Y waveguide structure based on a thin film lithium niobate, relates to the fields of microwave photonics, integrated optoelectronics and high-precision inertial sensing technology, and comprises a substrate, a lower cladding layer, a thin film lithium niobate layer and an upper cladding layer from bottom to top; and the polarization extinction ratio of the device is significantly improved according to the application; in view of the problem of poor polarization extinction ratio performance of the current monolithic integrated thin film lithium niobate Y waveguide due to the lack of an on-chip efficient polarization structure, the application creatively utilizes mode parity symmetry for filtering; the energy zero point position of the TE1 mode is determined by the waveguide electromagnetic field eigen equation and does not drift with the external environment temperature or stress; unlike the directional coupler relying on nanoscale gaps or the subwavelength grating with a minimum line width; the end-to-end transmission loss of the polarization and filtering of the application can be controlled at a very low level, so that the optical power margin and the overall signal-to-noise ratio of the fiber-optic gyroscope system detection end are significantly improved.

The invention provides a piezoelectric sensor, a display touch module and electronic equipment, and relates to the technical field of electronics, and the piezoelectric sensor comprises a first piezoelectric layer which is used for detecting the pressure acting on the piezoelectric sensor to generate deformation; the first electrode layer is located on one side of the first piezoelectric layer and used for receiving first charges generated by deformation of the first piezoelectric layer; the second electrode layer is located on the other side of the first piezoelectric layer and used for receiving second charges which are generated by deformation of the first piezoelectric layer and are opposite to the first charges in polarity so as to form response signals with the first electrode layer; the first packaging layer is located on the side, away from the first piezoelectric layer, of the first electrode layer; and the second packaging layer is positioned on one side, far away from the first piezoelectric layer, of the second electrode layer. According to the invention, the signal-to-noise ratio of the response signal of the piezoelectric sensor can be improved.

Sensing element transducers in a sensing system are connected to sensing element electronics by a switchable averaging network. The switchable averaging network may be configured to cause the sensing elements to operate in a sensing mode where the sensing elements all operate independently or in a calibration mode where the connected sensing elements have as an input a uniform signal generated by combining signals from all of the interconnected sensing element transducers. Signals output from the sensing system in the calibration mode may differ from the uniform signal due to unstable FPN (fixed-pattern noise) generated by the sensing element electronics and readout channels. These differences may be derived by comparing the signals output from the sensing system in the calibration mode to the uniform signal, and may be used to reduce FPN.

The utility model relates to the technical field of sensors, in particular to a high-precision double-range current sensor, a closed-loop circuit comprises a self-checking coil SC and a sampling resistor Rm, the self-checking coil SC is used for generating an excitation signal, the excitation signal is converted into an output signal through the closed-loop circuit, and the sampling resistor Rm is connected with the self-checking coil SC. The sampling resistor Rm is used for providing sampling current for the large-current range circuit and the small-current range circuit, and the large-current range circuit is connected to the two ends of the sampling resistor Rm in series; compared with a conventional sensor, according to the scheme, double-path output is adopted, a measured current wire penetrates through the sensor, the functions of amplification and signal conditioning of currents of different ranges are achieved through two paths of operational amplifiers, an external auxiliary circuit is matched, and therefore the function of high-precision double-range current measurement is flexibly achieved; according to the scheme, the current sensor adopts a closed-loop scheme to improve the signal-to-noise ratio and the detection precision, and is very suitable for occasions of high-precision current detection in a power electronic system.

The invention relates to the technical field of power electronics, discloses an on-line monitoring method for performance degradation of an inverter, and is used for solving the problems of high working condition noise, large environment drift and difficulty in early degradation monitoring in the prior art. According to the method, in the PWM dead zone time of the inverter, detection pulses are injected into a power device, electromagnetic and acoustic responses of the power device are synchronously collected, and a two-dimensional acoustic-electric resonance fingerprint is constructed. A variational auto-encoder is used to learn health fingerprint data, and a health baseline model representing a normal state is established. During on-line monitoring, measurement is dynamically calibrated through environment anchor points obtained in real time, drift influences such as temperature are eliminated, the difference between a real fingerprint and a model reconstruction fingerprint is calculated, and a physical degradation index is obtained. Through active silent detection and dynamic environment compensation, the device has strong anti-interference performance and high stability, and can realize high-sensitivity early warning for physical degradation of the device.

The present invention discloses a method and application for generating a frequency comb based on superstrong coupling of magnons and magnons, which belongs to the field of spin electronics technology. In a system of two superstrongly coupled magnons, when a pumping magnetic field with a frequency close to the frequency of the high-frequency branch magnon is applied, the system enters a nonlinear state. According to the amplitude of the pumping magnetic field, the system presents a frequency comb, period-doubling bifurcation and chaotic frequency comb. As the strength of the magnon-magnon coupling increases, the nonlinearity of the system is significantly enhanced, thereby reducing the demand for external power. Unlike traditional methods that rely on the weak nonlinearity of the material itself and require high power density to exceed the starting threshold, the superstrong coupling system provides an ideal platform for studying chaotic frequency combs. Chaotic systems have high sensitivity and noise resistance, and play an important role in signal detection. The present invention provides a new idea for the application of the magnon-magnon coupling mechanism in the fields of high-precision frequency measurement, information processing and sensitive detection.

The invention discloses a switching power supply peak signal detection method based on improved CFAR, and belongs to the technical field of signal processing and power electronics. The method comprises the following steps: controlling superposition of high-frequency ripples and noise through a dynamic random switching sequence, generating a transient peak in combination with a Gaussian pulse model, and synthesizing a high-trueness interference signal; designing a band-pass filter and a cross-correlation alignment algorithm to realize signal preprocessing and time domain alignment; multi-dimensional similarity evaluation indexes (a time domain correlation coefficient, dynamic time warping and spectrum energy similarity) are proposed to quantize signal features; an improved CFAR (Constant False Alarm Rate) detection algorithm is combined with a clustering matching strategy, and the detection precision and robustness of the transient peak are improved. The method can be applied to interference simulation, fault diagnosis and signal quality evaluation of power electronic equipment, and has the advantages of high-fidelity signal generation and low false alarm rate detection.

The invention relates to the technical field of on-chip self-calibration of chips, in particular to an on-chip self-calibration method and system for a high-disturbance-rejection CAN transceiver chip. The noise level of the environment where the chip is located is monitored in real time; determining an adjustment value of the driving parameter based on the noise level; and the driving parameters are adaptively adjusted according to the adjustment values so as to optimize the signal integrity and the anti-interference capability. The system comprises a noise monitoring module, a parameter calculation module and a parameter adjustment module which are integrated in a chip. The innovation point of the invention lies in that on-chip real-time self-calibration is realized, no external equipment is required to participate, and the signal quality is dynamically optimized in a complex electromagnetic environment in a mode of combining periodicity and event triggering. According to the method, the anti-interference capability and the signal integrity of the CAN bus can be remarkably improved, the communication error rate is effectively reduced, meanwhile, the method has the advantages of low power consumption, fast response, high integration level and the like, and the method is particularly suitable for occasions such as automotive electronics with strict requirements on reliability.

The invention discloses a sensing fabric with a microbridge structure and a preparation method thereof, and belongs to the technical field of wearable flexible electronics and electronic fabrics. The sensing fabric with the microbridge structure is prepared on a non-woven substrate which is approximately uniform in all directions through the collaborative design of PDA interface adhesion enhancement, CNT conductive network construction and PPy in-situ polymerization; micro-cracks are controllably generated when the carbon nanotubes are pulled, and a micro-bridge conductive path is formed by bridging the CNTs among the cracks; response splitting and double peaks caused by warp and weft orientation are reduced by the non-woven substrate; pDA improves interface bonding, CNT constructs a cross-fiber continuous network, and it is guaranteed that a conductive path is stable; the micro-crack-micro-bridge mechanism realizes an electro-mechanical response of'amplification without breaking, recoverable and repeatable 'in stretching / springback, so that high sensitivity, low hysteresis, fast response and high cycle stability are considered in a strain range of more than or equal to 100% (preferably-150%), the in-plane consistency and the signal-to-noise ratio are remarkably improved, and the method has a very good application prospect.

The invention relates to the field of wearable medical electronics and nerve monitoring equipment, in particular to a portable near-infrared brain function imaging system, and aims to solve the problem that the real-time signal-to-noise ratio (SNR) cannot meet reliable brain blood oxygen measurement requirements due to insufficient interference resistance of a long wiring harness analog signal chain of a portable fNIRS in a dynamic or high-noise environment. The system comprises a light source subsystem, a detector, a middle adapter plate, a main control board, a power supply module and a shell, a transimpedance amplifier is directly integrated behind a photodiode on a probe of the detector, an analog signal is amplified at a source and preliminarily filtered, the amplified signal is transmitted to the main control board through a wire harness, the anti-interference capability can be remarkably enhanced, and the detection accuracy is improved. The system signal-to-noise ratio and the measurement stability are improved, and meanwhile the load of a mainboard circuit module is relieved. In addition, the system is low in manufacturing cost.

The invention relates to the technical field of vehicle-mounted electronics, in particular to a vehicle-mounted video interference suppression method and system based on EMC optimization, and the method comprises the steps: building a transmission reference model; comparing the model with a composite signal on a transmission link in real time, extracting a holographic electromagnetic wave interference component through holographic differential processing, analyzing an amplitude-phase transfer function, and generating a reverse holographic electromagnetic wave through phase conjugate inversion; reverse holographic electromagnetic waves are coupled and injected into a link through a distributed holographic modulation array, and coherent cancellation is carried out on the reverse holographic electromagnetic waves and original interference; residual interference is monitored at the downstream of the link, and the offset effect is dynamically optimized through an adaptive weight updating algorithm. According to the invention, channel noise in a transmission link is eliminated from the source through active cancellation, the technical problem that a video signal is submerged by noise before reaching a receiving end in a strong electromagnetic interference environment is solved, and the suppression effect under complex and changeable working conditions is ensured through a self-adaptive closed-loop system. And the transmission reliability and fidelity of the vehicle-mounted video signal are obviously improved.

Method for controlling an electric traction drive, comprising a magnet-free electric machine (1) and power electronics (2), wherein the power electronics comprise at least a multi-stage inverter and / or at least an ARCP inverter, wherein, to generate a noise, an input signal (U1, V1, W1) for the power electronics (2) of the magnet-free electric machine (1) is varied by varying a signal in a rotor-fixed coordinate system corresponding to a predetermined torque request (T). ref ) torque-generating current (I q,ref ) or a corresponding voltage (u q,ref ) and / or a magnetic field-weakening current (I) for a given torque requirement d,ref ) or a corresponding voltage (u d,ref ) with a defined, torque-generating current based on a desired acoustic signal (I q,sg ) or a corresponding voltage (u q,sg) and / or a defined magnetic field weakening current based on a desired acoustic signal (I d,sg ) or a corresponding voltage (u d,sg ) is superimposed. and a device (3) designed to carry out the procedure.

The invention relates to the technical field of power electronics, and discloses a demodulation method and system for a load side of an LLC resonant converter, and the method comprises the following steps: receiving electric energy transmitted from the LLC converter by a load, and filtering out-of-band noise through a band-pass filter; s2, converting the carrier signal subjected to band-pass filtering into a discrete sampling sequence by an analog-to-digital converter; a low-pass filtering process after signal multiplication in coherent demodulation is replaced by an integration process; as a signal to be measured is converted into a discrete sequence through sampling, a sinusoidal signal multiplied by the discrete sequence in an integration process is converted into a sinusoidal sequence obtained by the same sampling frequency, and the integration process is converted into an accumulation process; the amplitude and the phase of the discrete signal are obtained; digital information is advanced from the output voltage of the LLC converter by analyzing the frequency, amplitude and phase of the signals.

The invention relates to the technical field of electronics, and discloses a pulse circuit, a PCB and a chip, and the pulse circuit comprises an input unit, a reverse unit, a filtering unit, a hysteresis unit, a driving enhancement unit, a logic control unit and an output unit. The input unit is electrically connected with the reverse unit and the filtering unit; the reverse unit is electrically connected with the filtering unit and the logic control unit; the filtering unit is electrically connected with the delaying unit, the delaying unit is electrically connected with the driving enhancement unit, the driving enhancement unit is electrically connected with the logic control unit, and the logic control unit is electrically connected with the output unit; according to the improved anti-interference circuit provided by the invention, the hysteresis unit and the driving enhancement unit are introduced, so that the stable hysteresis characteristic and strength of the pulse signal are improved, the pulse circuit can provide more stable and more accurate signal processing capability in a noise environment, and the overall performance and reliability of the circuit are remarkably improved; the problem that the performance of an existing pulse circuit is reduced in a high-noise environment is solved.

The invention discloses an adaptive volume control method for a commercial vehicle, and belongs to the technical field of vehicle electronics. According to the method, a hardware system comprising a microcontroller, an audio processing module and an environment noise detection module is constructed, and a multi-task software system is operated on the microcontroller, so that volume self-adaptive adjustment based on real-time environment noise is realized. The environment noise detection combines two modes of microphone direct acquisition and non-microphone indirect analysis (through loudspeaker back electromotive force difference). And the system respectively executes self-adaptive volume control logic of the external horn, the internal integral horn and the internal local horn according to a preset threshold value and a coefficient. The system can automatically adapt to different noise environments, effectively reduces the operation burden of a driver, improves the driving safety, optimizes the audio hearing definition and comfort inside and outside the vehicle, and enhances the use compliance of the loudspeaker outside the vehicle.

The present invention discloses a K-band limiting low-noise amplifier, which belongs to the field of radio frequency microelectronics technology. The amplifier comprises an input matching module, a diode limiting module, an inter-stage matching module, a low-noise amplifier module, and an output matching module, which are sequentially connected in cascade. The input matching module is used to achieve impedance matching between the radio frequency signal input end and the diode limiting module, and transmit the radio frequency signal. The diode limiting module is used to limit the radio frequency signal and transmit it. The inter-stage matching module is used to achieve impedance matching between the diode limiting module and the low-noise amplifier module. The low-noise amplifier module is used to amplify and transmit the limited radio frequency signal. The output matching module is used to achieve impedance matching between the low-noise amplifier module and the radio frequency signal output end, and output the amplified radio frequency signal. The present invention can limit the amplitude of the input signal so that it remains within the range that the low-noise amplifier circuit can withstand, thereby ensuring the stability and reliability of the entire system.

The invention discloses an integrated waveform acquisition and diagnosis method based on a desktop digital energy spectrum analyzer. The analyzer comprises a host shell and an electronics system integrated in the host shell. And the host shell consists of a host box and an inclined digital display box fixed on one side of the host box. A display screen and a plurality of parameter regulation and control keys are embedded in the front end of the digital display box; and one side of the host box is also provided with a commercial power access jack, a pre-discharge power supply interface, a pulse signal interface and a high-voltage power supply interface. Based on the analyzer, the invention also provides a waveform diagnosis method. The core of the method is as follows: when the energy spectrum performance is poor, an operator can synchronously observe the pulse original waveform, the digital forming process and the energy spectrum result so as to analyze a noise source or algorithm defects; and the pre-amplifier, high voltage or digital processing parameters are adjusted in real time through a parameter control key, and iterative optimization is carried out until the energy spectrum performance reaches the standard, so that rapid and visual fault diagnosis and system optimization are realized.

The active damping method of the wave trap combined with the amplitude attenuator relates to the field of power electronics. The application is to solve the problem that the method of using LCL type filter to suppress switching harmonic has inherent resonance peak, which can amplify noise at the resonance frequency, affect the waveform quality, and further cause tracking error of the current loop of the ultra-precision linear servo system and affect the positioning accuracy of the linear motor. The active damping method of the wave trap combined with the amplitude attenuator cascades the wave trap and the amplitude attenuator to the output end of the inverter in sequence, so that the wave trap and the amplitude attenuator constitute an active damper to realize active damping.