195 results about "Amplitude control" patented technology

The invention discloses a multi-stage collaborative protection simulation verification method for a subway power supply system, and the method comprises the steps: building an integrated simulation model which comprises an automatic reclosing switch, a spare power automatic switching switch and an automatic change-over switch based on an MATLAB / Simulink platform, and especially carrying out the precise modeling of an advanced compensation function of ATSE. The model is verified by a power-off test, a simulation result and actually measured data are highly consistent in voltage recovery time, an error of advanced compensation action time of ATSE is less than 2ms, and dynamic characteristics of an actual system are accurately reproduced. Model simulation shows that the advanced compensation strategy of the ATSE can effectively control the voltage sag amplitude within 15%, the power supply reliability of the system is remarkably improved, and through strict'simulation-actual measurement 'double-track verification, the model accurately reproduces the dynamic characteristics of the actual system, and shows remarkable advantages in the aspect of improving the power supply reliability.

The invention discloses a photovoltaic network construction control method and device based on voltage amplitude self-adaptive regulation and control. The method comprises the following steps: acquiring an intermediate-stage direct-current voltage in a working process of a photovoltaic panel; the DC / DC module operates in an MPPT tracking mode when the intermediate-stage DC voltage is lower than a set threshold value, and is switched to a constant-voltage mode when the intermediate-stage DC voltage is lower than the set threshold value to limit photovoltaic output; and the DC / AC module adopts a modification droop control method based on voltage amplitude self-adaptive regulation and control, an amplitude control item is introduced in amplitude control, and the output amplitude of the DC / AC module is adjusted in real time according to the intermediate-stage DC voltage deviation, so that the photovoltaic converter can adaptively adjust the output voltage amplitude. According to the invention, when the photovoltaic output of the photovoltaic converter is sufficient, the AC voltage is independently constructed, and the network construction control is realized; and when the photovoltaic output is insufficient and cannot meet the load demand, the photovoltaic converter adaptively adjusts the amplitude of the output voltage and stabilizes the frequency of the output voltage at the same time.

The invention discloses a low-sidelobe antenna based on double-metasurface amplitude and phase independent regulation and control. The antenna structure comprises a metasurface 1 and a metasurface 2. The metasurface 1 and the metasurface 2 comprise a plurality of metasurface units; the metasurface 1 is a phase modulation plane, comprises a phase regulation and control unit and is decoupled with the amplitude control function of the amplitude filtering plane; the metasurface 2 is an amplitude filtering plane and comprises an amplitude regulation and control unit, and the modulation process is decoupled from phase regulation and control of the metasurface 1; the phase regulation and control unit and the amplitude regulation and control unit comprise three metal layers and two dielectric layers; the first layer, the third layer and the fifth layer from bottom to top are metal layers, and the second layer and the fourth layer are dielectric layers. Through the design of the double-layer metasurface structure, completely independent operation of the phase regulation and control layer and the amplitude modulation layer is achieved, the technical contradiction that amplitude and phase parameters in a traditional single-layer metasurface are mutually restrained is avoided, and the core technical problem that the side lobe level of a transmission antenna is too high is solved cooperatively.

The utility model provides a heading machine. The heading machine comprises a machine body; the first rotating part is arranged at the front end of the machine body; the cutting assembly is connected with the first rotating part and can swing up and down under the action of the first rotating part; the first detection assembly is connected with the first rotating part and is used for detecting the lifting amplitude of the cutting assembly; the control assembly is connected with the first detection assembly and used for determining the final lifting amplitude of the cutting assembly according to the detection result of the first detection assembly; wherein the first detection assembly comprises a first gear which is connected with the first rotating part and can synchronously rotate along with the first rotating part; the second gear is meshed with the first gear; the first angle sensor is connected with the second gear and used for converting the rotation angle of the second gear into an electric signal and sending the electric signal to the control assembly. The heading machine can stably measure the lifting amplitude of the cutting assembly of the heading machine with high precision.

The invention discloses a terahertz phase shifter chip based on a magnetic coupling line fine adjustment technology, the magnetic coupling line fine adjustment technology is applied to a magnetic coupling line distributed attenuator, and a magnetic coupling line is added below a transmission line of the magnetic coupling line distributed attenuator. And a switching transistor array and a capacitive compensation transistor are respectively added at two ends of the magnetic coupling line. A vector synthesis type structure is adopted, the magnetic coupling line fine adjustment technology is innovatively provided and applied to the magnetic coupling line distributed attenuator, compared with a traditional distributed attenuator, the magnetic coupling line distributed attenuator has the advantages of being higher in precision and smaller in attenuation stepping, the occupied area is the same, the phase shifting control function of the phase shifter is achieved based on the attenuator, and the application range is wide. Finally, the phase of an output signal is controlled to realize a phase control function of 5.625-degree phase shift stepping in a full 360-degree range, and an amplitude control function in a 3dB range can be realized.

The present application relates to the technical field of data processing. Disclosed are a multi-nuclear imaging radio frequency power amplifier and a multi-nuclear magnetic resonance imaging hardware system. The multi-nuclear imaging radio frequency power amplifier comprises: a radio frequency signal input end, a radio frequency switch, a pre-compensation circuit, a voltage-controlled attenuator, a voltage-controlled phase shifter, a broadband radio frequency power amplifier, a broadband directional coupler and a radio frequency signal output end; a first output abnormality protection control circuit; a second output abnormality protection control circuit; an amplitude control circuit; and a phase control circuit. By means of the multi-nuclear imaging radio frequency power amplifier in the present invention, nonlinear correction can be performed on the amplitude and phase of a broadband radio frequency power amplifier, such that the broadband radio frequency power amplifier keeps meeting the requirements for high linearity and high power at an operating frequency point of a corresponding nuclide, so as to ensure the linear relationship between input and output signals of a radio frequency power amplifier and adequate signal strength, thereby avoiding the generation of artifacts due to signal distortion, and ensuring the accuracy and clarity of magnetic resonance imaging.

The invention discloses a terahertz metasurface capable of realizing independent control of amplitude and phase. The terahertz metasurface comprises a terahertz transparent substrate; the metasurface unit array is periodically arranged in a first direction, and each metasurface unit comprises a first structural layer which is of a dielectric resonance structure and is used for providing a phase regulation and control function; the second structural layer is a thin film formed by an adjustable absorption material and is used for providing an amplitude regulation and control function; the second structure layer is provided with an independent electrode for adjusting the transmission amplitude; a first dielectric isolation layer is arranged between the terahertz transparent substrate and the first structure layer and is used for reducing an electromagnetic coupling effect; the first structural layer and the second structural layer are stacked in the vertical direction through a three-dimensional processing technology, a second dielectric isolation layer is arranged between the first structural layer and the second structural layer, and the second dielectric isolation layer is a silicon dioxide SiO2 or silicon nitride Si3N4 film with the thickness D ranging from 100nm to 1000nm.

The invention discloses a crane falling and amplitude variation control method and device, electronic equipment and a storage medium. The crane falling and amplitude changing control method comprises the steps that current working condition information of a crane is obtained; on the basis of a pre-generated four-dimensional feed-forward control model, a feed-forward control current value is calculated according to the current working condition information, and the four-dimensional feed-forward control model represents the mapping relation between the working condition information and the main arm descending valve control current of the crane in the constant-speed descending state; the actual descending speed of the main arm of the crane is obtained and compared with the set expected descending speed, and a closed-loop correction current value is calculated through a closed-loop control algorithm based on the speed error; and superposing the feedforward control current value and the closed-loop correction current value to obtain a total control current, and outputting the total control current to a main arm descending valve of the crane so as to control the descending speed of the main arm of the crane. According to the invention, the descending process of the main arm is stable and constant in speed, and the stability and safety of the hydraulic control crane in the amplitude variation action are improved.

The invention discloses a modularized microwave signal source, which belongs to the technical field of microwave communication and comprises a radio frequency front-end module, a lower variable intermediate frequency and mixing filter module, an upper variable intermediate frequency and mixing filter module, an amplitude control module and a power supply control board for supplying power to and controlling the modules in a distributed manner, each module is arranged in an independent cavity with an electromagnetic shielding structure; the modular microwave signal source adopts a secondary mixing superheterodyne scheme as a basic microwave link, and adopts a primary mixing scheme as a millimeter wave extension link. The modularized microwave signal source is divided into a plurality of standardized modules which can be independently detached and have subdivided functions, so that the problems of difficulty in maintenance, fixed design and high cost of a traditional high-integration-level microwave component are solved, and the high performance, high maintainability, strong reusability and wide-frequency-band coverage effect of the microwave signal source are realized.

The invention provides a self-synchronizing voltage source string type photovoltaic inverter system and a control method. The self-synchronizing voltage source string type photovoltaic inverter system comprises an internal potential frequency control module, a power angle rapid adjustment control module, an internal potential amplitude control module, a dual-mode parallel-competitive dominant control module, a bridge arm modulation voltage control module and an internal potential amplitude limiting control module. The dual-mode parallel-competitive dominant control module is respectively connected with the internal potential frequency control module, the power angle rapid adjustment control module and the bridge arm modulation voltage control module; the bridge arm modulation voltage control module is connected with the internal potential amplitude limiting control module; and the internal potential amplitude limiting control module is connected with the internal potential amplitude control module. According to the invention, seamless smooth switching between a limited power working mode and a maximum power tracking working mode is realized, so that self-synchronizing voltage source control of the string type photovoltaic inverter is realized in a full operation mode.

The invention discloses a multi-channel high-isolation low-power-consumption array receiving module. A power supply and control circuit is connected with a local oscillator amplification power division circuit; the power supply and control circuit is used for converting an externally accessed power supply into a power supply voltage required by the receiving module, and controlling the receiving frequency conversion circuit through an external control instruction to realize the functions of amplitude control, band-pass filter group switching, polarization selection and the like; the receiving frequency conversion circuit comprises a plurality of receiving frequency conversion links, and each receiving frequency conversion link receives the first local oscillator signal and the second local oscillator signal sent by the local oscillator amplification power division circuit and is used for converting a radio frequency signal input into the receiving frequency conversion link into an intermediate frequency signal to be output; the local oscillator amplification power division circuit is used for dividing the local oscillator signal into a first local oscillator signal and a second local oscillator signal, and inputting the first local oscillator signal and the second local oscillator signal into the receiving frequency conversion link. The circuit has the advantages of high circuit integration degree, small size, compact structure, excellent performance, high reliability and the like.

The invention discloses an antenna control method, system and device and a computer readable storage medium, and relates to the technical field of communication, and the method comprises the steps: obtaining a target position of a terminal device; generating mechanical platform control information and beam forming control information according to the target position; performing angle control on the mechanical platform according to the mechanical platform control information; performing angle control on the beam forming chip according to the beam forming control information; wherein the mechanical platform is used for carrying out horizontal rotation and / or pitching rotation on the antenna array; and the beam forming chip is used for performing phase control and / or amplitude control on the antenna array. According to the invention, large-range coarse adjustment of the horizontal angle and / or the pitching angle of the antenna array can be carried out by means of the mechanical platform, and small-range fine adjustment of the antenna array can be carried out by means of the beam forming chip, so that the antenna array can flexibly send beams to the terminal equipment, the beam width limitation of a small-size array is broken through, and the antenna array can be flexibly and accurately adjusted. And the signal quality of the terminal equipment is improved.

The invention discloses an amplitude auxiliary maintaining method and device for a hemispherical resonator gyro and the hemispherical resonator gyro, and the amplitude auxiliary maintaining method comprises the following steps: setting the voltage of all electrodes of the hemispherical resonator gyro to be 0, and after the hemispherical resonator gyro starts oscillation, starting the hemispherical resonator gyro; the output of an amplitude control loop of the hemispherical resonator gyroscope is converted into an alternating current signal, then the alternating current signal is switched to a high-voltage electrode of the hemispherical resonator gyroscope, and meanwhile, a direct current signal applied to the high-voltage electrode is kept unchanged. The high-voltage electrode is reused as the annular electrode to assist in maintaining the amplitude of the hemispherical resonator gyroscope, the circuit improvement structure is simple, and software can be compatible with a traditional control algorithm.

Provided is a wireless power transmitting system and device, the wireless power transmitting device including: a signal generator configured to generate an initial signal; a controller configured to output an amplitude control signal and a phase control signal; a phase modulator configured to generate a phase-modulated signal by modulating a phase of the initial signal based on the phase control signal; a power amplifier configured to generate a power signal by amplifying the phase-modulated signal; a voltage converter configured to control a magnitude of a power voltage of the power amplifier based on the amplitude control signal; and an antenna configured to externally output the power signal.

The application provides an AM-PM distortion calibration method applied to an UWB transmitter and belongs to the field of UWB communication. The method adds a sampling resistor between a linear voltage stabilizing power supply LDO and a digital power amplifier DPA driving stage of the UWB transmitter using a digital power amplifier, so as to simulate the instantaneous change of the power supply voltage of the DPA driving stage when the UWB pulse is transmitted; an adjustable delay unit is added between a carrier input port LO and the DPA driving stage; the continuous sine wave is transmitted, the phase information under each digital baseband amplitude control word is collected to form original data of the AM-PM distortion of the UWB transmitter, the digital baseband output AM-PM control word is used to control the adjustable delay unit to output the phase which is opposite to the original data and has the same size, so that the phase predistortion of the transmitted UWB pulse is realized, and the AM-PM distortion calibration is completed. The application has the advantages of simple implementation and strong compensation capacity.

The present application relates to the field of GTAW welding, and is a GTAW longitudinal swing wire feeding intelligent control system and method based on magnetic control. In view of the problems of the wire end deviating from the tungsten electrode and the unstable droplet transfer in the GTAW longitudinal swing wire feeding welding, a GTAW longitudinal swing wire feeding intelligent control system and method based on magnetic control is proposed. The relative position of the wire end and the tungsten electrode is controlled by using a visual sensing-based wire end and tungsten electrode relative position adaptive calibration method; the longitudinal swing amplitude of the GTAW wire is controlled by using a magnetic field-based GTAW wire longitudinal swing amplitude control method; the longitudinal swing frequency of the GTAW wire is controlled by using a magnetic field-based GTAW wire longitudinal swing frequency control method; and the wire feeding speed is controlled by using a wire sensing-based wire feeding speed control method.

The invention relates to the technical field of grounding, and discloses an anti-vibration and anti-damage grounding suspension device for a transformer substation, the anti-vibration and anti-damage grounding suspension device comprises a U-shaped hook and movable openings formed in the two sides of the hook, clamping jaws are hinged in the two movable openings of the hook, and a torsion spring is mounted on a connecting shaft of the clamping jaws, so that the two clamping jaws clamp a cable towards the inner side together; and the inner side of the hook is provided with an elastic component which is in contact with the cable, so that the cable is in contact with the elastic component under the locking of the two clamping jaws, and the vibration of the cable and the damage to the cable can be avoided. The elastic component is of a composite structure, the elastic layer absorbs most vibration impact force through compression and resilience, the elastic metal assists in dispersing stress, and fatigue damage of the cable due to high-frequency vibration is avoided; the upper and lower clamping structures cooperate with the clamping force of the torsion spring, the vibration displacement amplitude of the cable is controlled within a small range, collision with peripheral equipment is prevented, and the fault risk is reduced.

This invention discloses a stable amplitude control system for a high-Q MEMS resonator. This system is a digital closed-loop drive system based on a field programmable gate array (FPGA) as the control platform and DDS-PLL technology as the control scheme. The system uses a digital phase-locked loop (DPS) algorithm for frequency synthesis to track the gyroscope's vibration resonant frequency and phase. This structure utilizes the DDS algorithm to provide a high-resolution frequency signal, ensuring sufficiently small frequency steps. The PLL's bandpass characteristics also effectively suppress some spurious signals in the DDS output spectrum, achieving the complementary advantages of DDS and PLL. This improves the dynamic performance of the high-Q MEMS resonator control system, optimizes the stability accuracy of the MEMS gyroscope's amplitude and frequency, and further enhances the MEMS gyroscope's zero-bias output and anti-interference capabilities.

The application discloses a multi-octave wideband frequency conversion assembly, which comprises a frequency conversion circuit, an amplitude control circuit and a switch filter set, wherein the frequency conversion circuit expands the input radio frequency to an intermediate frequency signal through two local oscillator frequency points for the input radio frequency signal and outputs the intermediate frequency signal to the amplitude control circuit; the amplitude control circuit adjusts the amplitude of the intermediate frequency signal output by the frequency conversion circuit; the switch filter set filters the signal output by the amplitude control circuit through a multi-path filter set, filters out harmonics and stray signals, and performs amplitude correction to obtain a multi-octave intermediate frequency output signal. The 3-4GHz signal is expanded to a ten-octave signal of 0.2-2GHz which can be directly processed by a digital circuit through the two local oscillator frequency points of 4 / 5GHz, the output power reaches 10dBm, the harmonic suppression reaches more than 48dBc, the power flatness reaches ±1dB, the dynamic range reaches more than 60dB, and the step is only 0.25dB.

The invention relates to the technical field of household appliances, in particular to an air conditioner which comprises a refrigerant circulation loop, an exhaust temperature sensor and a controller, and the controller firstly obtains the exhaust temperature of a compressor monitored by the exhaust temperature sensor and determines the temperature change rate of the exhaust temperature based on the exhaust temperature; when it is determined that the frequency reduction condition is met according to the exhaust temperature and the temperature change rate, the controller determines the frequency reduction amplitude and controls the compressor to operate in a frequency reduction mode according to the frequency reduction amplitude; or, when it is determined that the frequency increasing condition is met according to the exhaust temperature and the temperature change rate, the controller determines the frequency increasing amplitude and controls the compressor to operate in a frequency increasing mode according to the frequency increasing amplitude; the temperature change rate is introduced to serve as control input, the current exhaust temperature and the change trend of the current exhaust temperature are concerned, and therefore the frequency of the compressor can be accurately and timely adjusted, the problem of frequency oscillation of the compressor caused by exhaust temperature detection and control lag is effectively solved, and more stable, efficient and reliable operation of the air conditioner is achieved.

This invention discloses an integrated navigation transmitter assembly based on digital multi-beam technology, belonging to the field of phased array technology. It includes a lower panel, a transmitter terminal, an up-converter, a power amplifier, a receiver-resistance filter, and a upper panel. This invention adopts an integrated design, combining the transmitter terminal, up-converter, power amplifier, and receiver-resistance filter into a single assembly, resulting in a compact structure and convenient installation and maintenance. It employs a decentralized design, distributing signal generation functions to each transmitter assembly, achieving beam delay, phase, and amplitude control in the digital domain. Compared to traditional analog TR assemblies, this provides higher control precision and more flexible beam pointing. Furthermore, this invention utilizes modular shielding technology, placing digital circuits, analog circuits, and high-power equipment in independent metal shielding cavities, significantly reducing signal leakage and solving the problem of electromagnetic interference between assemblies in large-scale array deployments. This invention has good versatility, allowing adjustment of the transmitted signal waveform and frequency as needed.

The application provides a spatial sound field real-time generation device based on a light-controlled programmable ultrasonic phased array, realizes continuous phase modulation and amplitude control of array elements, does not need to separately configure a high-voltage pulse circuit or an independent amplifier for each channel, thereby guaranteeing the compactness of the system structure and the low power consumption advantage; the light-controlled phase shift unit independently controls the phase of each ultrasonic element by adjusting the light intensity, realizes accurate regulation and control of the wave front direction; the overall layout of the array and the power input are kept synchronous, thereby guaranteeing the controllability of the amplitude and energy output of the ultrasonic field; the application decouples the phase control and the power driving, effectively avoids the complex wiring problem of multi-channel synchronous control, and improves the flexibility and scalability of array operation; in addition, the introduction of the light-controlled mode significantly simplifies the array driving circuit, realizes parallel control of a large-scale array, and thereby forms an ultrasonic field generation device with high compactness, excellent controllability and high flexibility.

The invention relates to a locking type steel wire thread insert vibration test clamp device and a vibration test method, which are suitable for vibration examination of a locking type steel wire thread insert in a free state in an aero-engine. The device comprises a clamp base body, a bolt connecting hole, an O-shaped groove and an induction block. The clamp base body is rigidly connected with the electromagnetic vibration table through a bolt, the O-shaped groove is used for installing a steel wire thread insert test piece, the induction block is made of piezoelectric crystal materials, and when the steel wire thread insert vibrates to reach the set amplitude, the induction block is contacted to generate induction current to drive the induction lamp or the ampere meter to display. The test method comprises seven steps of system connection and preparation, parameter setting and starting, vibration amplitude monitoring, amplitude adjustment, assessment state confirmation, vibration assessment execution and test ending. Through a closed-loop control system formed by an external source signal generator and a laser displacement sensor, single-degree-of-freedom fixed-amplitude vibration in a non-resonance state is realized, the amplitude control is accurate, overload is avoided, parallel testing of multiple test pieces is supported, the test efficiency is improved, the method is closer to actual working conditions, and the method has higher engineering application value.

This application discloses a distributed fiber optic vibration sensor wiring method and wiring device for bridge structures. The method includes the following steps: determining the key monitoring areas of the bridge; deploying a wiring device in the key monitoring areas; sequentially passing single-mode optical fibers through the fiber inlet and outlet ports to obtain an optical fiber sensing network; winding the single-mode optical fibers according to a set method to form redundant fiber segments; using cyanoacrylate adhesive to couple and fix the straight segments of the main optical fibers along the centerline of the bridge structure to the bridge surface; dynamically adjusting the number of winding turns of the redundant fiber segments by controlling the servo motor in the wiring device according to the real-time vibration frequency and amplitude of the bridge; by deploying a wiring device with redundant optical fibers in the key monitoring areas, the density of local optical fiber sampling points is increased by utilizing the redundant segments to meet the bridge monitoring requirements; and the winding speed is dynamically adjusted by the servo motor to ensure that the optical fibers maintain constant tension during storage and deployment, thus avoiding damage to the optical fibers.

The utility model discloses a power device overcurrent short circuit protection circuit, which is connected between a power device driving signal circuit and a desaturation detection circuit, and comprises a first divider resistor, a second divider resistor, a first amplitude control resistor and a second amplitude control resistor which are electrically connected in sequence, the first divider resistor is connected with a power device driving signal output end of the chip; a branch of a connection point between the first amplitude control resistor and the second divider resistor is connected to a collector of the power device; a connection point between the first amplitude control resistor and the second amplitude control resistor is used as an input end of the desaturation detection circuit; according to the utility model, on the basis of realizing the desaturation detection circuit, the fine tuning effect of blanking time (namely, the anti-noise time delay can be controlled) is realized at the same time, and the driving structure cost is obviously reduced on the premise of ensuring the driving reliability of the power device without depending on the DESAT function pin of the driving chip.

The present invention relates to the field of work platform control technology, specifically a working range control method and system, in which a first telescopic arm is used to drive a work platform to rise in a vertical direction. When the length and angle of the first telescopic arm exceed the set working range limit and the work platform has not reached the target position, the second telescopic arm is actuated and cooperates with the first telescopic arm to continue to drive the work platform to rise in the vertical direction until it reaches the target position. When the first telescopic arm does not exceed the set working range limit, the posture of the first telescopic arm is corrected according to the set angle difference. During the coordinated movement of the first telescopic arm and the second telescopic arm, the posture of the second telescopic arm is corrected according to the set angle difference, and the posture of the first telescopic arm is further corrected according to the height change of the work platform from the ground. This method solves the limitations of the traditional control process and stably increases the working range of the work platform within a safe range through the coordinated movement and posture correction of the two telescopic arms, thereby expanding the operating range of the platform.

The invention belongs to the field of signal modulation processing, and particularly relates to an automatic amplitude control method and system applied to radio frequency signal multi-domain modulation, which mainly comprises the steps of first peak detection and amplitude control parameter calculation, first amplitude control, second peak detection and amplitude control parameter calculation, second amplitude control and the like. Through two-stage peak detection and two-time gain control, intermediate-frequency IQ signal waveform data acquired by AD and multi-domain modulation can be realized, especially amplitude control of signal waveform data after intermediate-frequency domain and spatial domain modulation can be realized, processing insertion loss brought by a multi-domain modulation module can be minimized, and the processing efficiency can be improved. And the multi-domain modulation processing of the radio frequency signal is supported to have a power dynamic state as large as possible so as to simulate the dynamic propagation of the signal in a large-scale space.

The utility model provides a motor control system and a motor assembly. The motor control system is used for controlling a motor and comprises a data acquisition module, a control module and a driving module. Wherein the data acquisition module is arranged on the motor so as to acquire operation parameters of the motor; the data acquisition module comprises a first sensor for acquiring the mechanical vibration frequency and / or amplitude of the motor, and the operation parameters comprise the mechanical vibration frequency and / or amplitude of the motor. The control module is coupled and communicated with the data acquisition module, and outputs a control signal according to the operation parameters acquired by the data acquisition module. The driving module is coupled and communicated with the control module, is coupled with the motor, and adjusts a current control parameter input into the motor according to the control signal. According to the embodiment of the utility model, the current input into the motor can be adjusted according to the real-time mechanical vibration condition of the motor, the real-time performance is high, the mechanical vibration of the motor can be reduced, the operation efficiency of the motor is improved, and the service life of the motor is prolonged.

This invention discloses a vector modulation active phase shifter, comprising a coupling network (100) for generating quadrature signals, a first active amplitude control module (200) and a second active amplitude control module (300) composed of a common-source cascode transistor array for adjusting the gain of in-phase and quadrature signals, and a power combining and output matching network (400). The vector modulation active phase shifter includes a phase compensation network (500) located between the coupling network for generating quadrature signals and the active amplitude control module, used to optimize the phase bandwidth of the quadrature signals and improve phase shift accuracy. This invention realizes a wideband, high-precision, directly digitally controlled vector combining active phase shifter with a 360° phase shift range.

The invention discloses an ultrasonic motor driving control strategy based on voltage amplitude-frequency hardware decoupling. Phase voltage, phase current and rotation angle signals of a motor are sampled through a sensor and an encoder, a voltage and current phase difference is obtained by adopting a zero crossing point detection method, resonant frequency is obtained by combining a PID frequency regulator, and independent frequency control is realized by matching with a fixed duty ratio; the rotating speed is obtained through differential operation, reference voltage is obtained through a PI regulator, and independent amplitude control is achieved by combining a voltage amplitude obtained through a rectification average value method with a PID voltage regulator and matching with a fixed frequency. The two-stage circuit topology is adopted to independently regulate and control the voltage amplitude and the voltage frequency, the problems that voltage amplitude regulation is nonlinear and voltage frequency regulation is coupled in a traditional ultrasonic motor driving scheme are solved, the voltage amplitude is independently regulated at the front stage, the voltage frequency is independently regulated at the rear stage, hardware decoupling of the voltage amplitude and the voltage frequency is achieved, and the system reliability is improved. The harmonic content of the output voltage of the driving circuit is lower, and the voltage control is more linear.