28 results about "Amplitude control" patented technology

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.

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.

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.

This application discloses a method, apparatus, device, and medium for nonlinear drive gain compensation of a hemispherical resonator gyroscope, relating to the field of gyroscope attitude control technology. The method includes: exciting a resonator with different frequency drive voltages and obtaining a first amplitude control voltage and a second amplitude control voltage corresponding to the resonator maintaining a preset constant amplitude; determining target parameters based on the first and second amplitude control voltages; obtaining the real-time vibration state of the target hemispherical resonator gyroscope operating in full-angle mode; determining a target drive gain correction coefficient based on the real-time vibration state and target parameters; and compensating for the nonlinear drive gain of the hemispherical resonator gyroscope based on the target drive gain correction coefficient. By obtaining different voltages corresponding to the resonator maintaining a preset constant amplitude and obtaining parameters characterizing the nonlinearity of the gyroscope drive, interference from other error sources is avoided, and the problem of incomplete compensation is solved.

The present invention relates to a stimulation generator suitable for use in an implantable neurostimulator, including an injectable neurostimulator. The stimulation generator is adapted to provide a configurable stimulation signal comprising a component, such as a pulse. The stimulation generator comprises circuitry to receive and combine an amplitude control signal and a duty cycle signal to produce a preliminary output voltage signal which includes the component of the stimulation signal. It further comprises a voltage-controlled current source adapted to be driven by the preliminary output voltage signal; and a mode selector controlled by a stimulation mode signal to output the component from the preliminary output voltage signal as a current-controlled component of the stimulation signal via the voltage-controlled current source or as a voltage-controlled component of the stimulation signal.

The present application relates to a kind of short-circuit current calculation method, device and medium of photovoltaic power generation unit, comprising: the short-circuit current calculation formula corresponding to constant power control stage and limiting amplitude control stage is analyzed;Short-circuit current fault whole process is divided into five detailed stages, respectively, is the initial stage 1 of fault, the initial stage 2 of fault, the stage after the initial stage of fault, the stage before the end of fault and the stage after the end of fault, and the constant power control stage, limiting amplitude control stage is respectively corresponded to above-mentioned five detailed stages, the corresponding relationship of control stage and fault detailed stage is established;The parameter solving model of short-circuit current calculation formula corresponding to the five detailed stages is constructed, for solving unknown parameter in each detailed stage short-circuit current calculation formula;Based on the parameter solving model solving each detailed stage parameter, the corresponding parameter in short-circuit current analytical expression is modified, and then the short-circuit current of photovoltaic unit in each fault stage is calculated.

The application discloses a magnetostrictive ultrasonic tool holder and a method for realizing amplitude control. The method utilizes the inverse magnetostrictive effect of magnetostrictive material, and through a driving and self-sensing module arranged outside the magnetostrictive transducing material, the actual output amplitude of the system can be obtained in real time during processing without additional sensors or optical equipment. The method effectively overcomes the defects of relying on laser measurement and only being able to monitor no-load, and supports dynamic amplitude monitoring in the processing state. The magnetostrictive ultrasonic tool holder provided by the embodiment of the application has simple structure, is easy to implement, and can reflect the cutting state monitoring of the actual output state of the system in real time during processing, thereby improving the stability of the output of the ultrasonic processing system and the reliability of the processing process.

An antenna array feed network includes two or more antenna elements, a 180° hybrid coupler, one or more combiners, two or more transceiver systems including a secondary transceiver system with a transceiver, a diplexer, and amplifier with each remaining transceiver system including a transceiver, a diplexer, a directional coupler, a RF switch, a preamplifier, a network circulator, a programmable attenuator, and an amplifier. The two or more antenna elements form an antenna array. The 180° hybrid coupler provides amplitude controlled null steering and two separate RF signals for an individual port of the antenna array. The programmable attenuator provides automated null steering algorithms for the antenna array feed network. The analog phase shifter equalizes magnitudes of a phase of the two more antenna elements. The one or more combiners feed two or more transceiver systems into the 180° hybrid coupler or the antenna elements into the 180° hybrid coupler.

The present invention provides a power amplifier, amplification method, and transmitter that can be miniaturized. [Solution] According to one embodiment, the power amplifier comprises a power amplifier core 4 capable of discrete integer amplitude control and a variable attenuator 5. The power amplifier core 4 regenerates the RF signal envelope by amplitude control, and the variable attenuator 5 changes the amount of attenuation. The average transmit power is controlled by the combination of the amplitude control of the power amplifier core 4 and the amount of attenuation of the variable attenuator 5.

This invention provides a hybrid beamforming method and system for resisting channel aging in MIMO-OFDM systems, improving beam alignment accuracy and spectral efficiency in high-mobility scenarios. First, the user terminal receives pilot signals, extracts and aggregates channel semantic features, generates fused temporal features through a bidirectional long short-term memory network, performs amplitude control using a learnable residual threshold, and superimposes these features to obtain the predicted channel state. Next, the predicted channel is converted to the angle-delay domain, quantized into a binary bitstream after multi-scale convolution and channel attention calibration, and fed back to the base station. Finally, the base station reconstructs the analog and digital precoders using a dual-head parallel decoding architecture and jointly optimizes the network parameters using a negative sum rate loss function. This invention effectively combats channel aging through temporal prediction and end-to-end collaborative learning, significantly improving the system's sum rate and robustness.

Control circuit (1) and method for controlling a drive movement of a gyroscope with a phase control loop (3) for controlling a frequency of the drive movement of the gyroscope; an amplitude control loop (4) for controlling an amplitude of the drive movement of the gyroscope;and with a digital control unit (5) for controlling the phase control loop (3) and the amplitude control loop (5), wherein the phase control loop (3) and / or the amplitude control loop (5) includes a discrete-time analog filter with at least one integrated operational amplifier, which is switched on during a sampling phase by the digital control unit (5) and switched off during a reset phase by the digital control unit (5), wherein a duty cycle between the duration of the sampling phase and the duration of the reset phase is configurable by the digital control unit (5) of the control circuit (1) for setting a target variable according to a target specification of the control circuit (1).

This invention relates to a speed control method and electronic device for permanent magnet synchronous motors (PMSMs) based on singular perturbation theory. The method includes: establishing a singular perturbation model of the PMSM and decoupling it into a fast-changing subsystem and a slow-changing subsystem; constructing an amplitude control set model predictive controller to obtain a voltage amplitude candidate set and establishing a current prediction model; calculating a q-axis current reference value based on a deadbeat controller; constructing a cost function based on the q-axis current reference value; using the cost function and the current prediction model to traverse the voltage amplitude candidate set; selecting the voltage combination with the minimum cost function as the optimal voltage control signal; and driving the PMSM based on the optimal voltage control signal. Compared with existing technologies, this invention has advantages such as improved current tracking accuracy, suppression of harmonics and torque ripple, ensuring rapid tracking of speed commands, and simultaneously meeting the requirements of high dynamics, high precision, and robust control of motor speed.

The application is based on an X-band power amplifier system of an eight-port radio frequency pulse amplitude control microstrip network, which is composed of a power amplifier driving and sampling comparison module, an eight-port radio frequency pulse amplitude control microstrip network module, a power amplifier module and a power amplifier control and power supply module; a linear frequency modulation pulse signal generated by a radar transmitter is input to the power amplifier driving and sampling comparison module, is amplified by the power amplifier module again through the eight-port radio frequency pulse amplitude control microstrip network module and is output; the power amplifier control and power supply module controls and supplies power to the whole system. The application embeds an eight-port radio frequency pulse amplitude control microstrip network in a radar power amplifier system, directly controls the amplitude of a radar radio frequency pulse envelope signal in a solid-state power amplifier, reduces the sidelobe amplitude of a pulse compression signal in a final receiver, improves the detection ability of a small target and the display effect of a radar echo, and reduces the cost and design complexity of a radar transmitter.

The application relates to the technical field of massage equipment, and discloses an amplitude control method and device based on myoelectric signals and a massage equipment, and aims to solve the problem of poor accuracy of the amplitude adjustment mode of the existing massage equipment, and the scheme mainly comprises the following steps: acquiring myoelectric signals of a current massage part; determining the muscle type of the current massage part according to the myoelectric signals, and determining an initial amplitude according to the muscle type; and adjusting the amplitude of the massage equipment to the initial amplitude, so that the massage equipment massages the current massage part at the initial amplitude. The application improves the accuracy of the amplitude adjustment of the massage equipment, and is particularly suitable for a fascia gun.

The invention relates to a method for controlling the movement of a piston in a motor (LM) of a linear compressor (LK) of a household refrigerator (K), in which a target cooling capacity (C*) or equivalent quantity (qm) is specified by the household refrigerator (K), a target piston amplitude (aC*) during compression and a target piston amplitude (aE*) during expansion are calculated from the target cooling capacity (C*) or equivalent quantity (qm), and the target piston amplitudes (aC*, aE*) are transmitted to an amplitude control (V2) as setpoints for controlling the movement of the piston to the target piston amplitudes. The invention also relates to a household refrigerator (K) configured to perform the method, and to a computer program product comprising code that, when executed on a data processing device of the household refrigerator (K), performs the method.The invention is particularly advantageously applicable to refrigerators and / or freezers.

The application relates to a switching power supply circuit, a control method thereof, a chip and an electronic device. The switching power supply circuit comprises an error amplification module, an amplitude control module and a frequency control module. The amplitude control module is configured to control the peak current value of the output of the switching power supply circuit. The frequency control module is configured to control the switching frequency of the switching power supply circuit. The error amplification module is connected with the amplitude control module and the frequency control module, can sample an electrical signal representing the size of the load connected to the switching power supply circuit, and can adjust the peak current value of the output of the switching power supply circuit and the switching frequency of the switching power supply circuit by controlling the frequency control module and the amplitude control module based on the electrical signal. The amplitude and frequency of the switching power supply circuit are adjusted by a single signal source, so that efficient, stable power supply output and better load adaptability are realized.

This invention discloses a hybrid beamforming method and system for coexisting radio networks based on reconfigurable holographic surfaces (RHS). The method includes: constructing a communication architecture with the RHS as the transmit antenna to eliminate dual path loss; designing a dual-mode signal demodulation strategy. Strategy I employs MMSE-SIC combined with MRC technology to first demodulate the ambient signal, then removes the received signal from the SN via SIC, and demodulates the backscattered signal one by one. Strategy II designs the ambient signal and its transmission frame structure, combined with zero-forcing beamforming, to demodulate the backscattered signal, avoiding the propagation of ambient signal demodulation errors. The method optimizes transmit power using gradient descent, handles the non-convex constraints of digital beamforming using fractional programming, and optimizes the RHS amplitude control matrix using a sequential parameter convex approximation algorithm, achieving efficient alternating optimization of these three aspects. The advantages of this invention are: improved energy efficiency in multi-user scenarios, reduced system power consumption, support for dynamic network topologies while maintaining high reliability, and breakthroughs in the limitations of existing single-user solutions.

A one-way data link analog transmission device includes an intermediate frequency (IF) signal unit, a frequency synthesizer unit, a mixer unit, a radio frequency (RF) transmission unit, a local control unit, and a programmable network interface. Each unit is an independent module equipped with an electromagnetic compatibility (EMC) shielded shell, assembled into an integrated device with an aluminum alloy unibody package. The IF signal unit uses an FPGA+DAC architecture to generate IF modulation signals; the frequency synthesizer unit provides a highly stable local oscillator signal and clock reference; the mixer unit performs signal mixing to generate a pre-modulated signal; the RF transmission unit performs multi-stage processing to achieve RF signal up-conversion and high-precision amplitude control, and adopts adaptive power control. This invention features a pure one-way architecture, weighs less than 3 kg, has a deployment time of less than 5 minutes, can accurately reproduce the one-way command transmission characteristics in aviation equipment, has strong anti-interference capabilities, stable transmission, and is suitable for multiple scenarios such as airborne, field, and laboratory applications. Its cost is only 25% of the market standard target source, and it can be matched with various aviation equipment communication protocols, exhibiting excellent practicality and scalability.

The present disclosure relates to a power amplifier, an amplification method, and a transmitter. According to an embodiment, the power amplifier includes a power amplifier core unit capable of performing amplitude control in discrete integer steps and a variable attenuator. The power amplifier core unit performs amplitude control to reproduce an envelope of an RF signal. The variable attenuator changes an attenuation amount, and controls average transmission power by using a combination of the amplitude control performed by the power amplifier core unit and the attenuation amount of the variable attenuator.

This invention discloses a floating wind turbine gyroscope roll reduction method and system based on ELI and deep reinforcement learning. It employs a hierarchical architecture of outer-loop environmental assessment and inner-loop intelligent control. The outer loop calculates the environmental load intensity index based on wind speed, wave height, and wave period, and adaptively adjusts the target rotor speed of the roll reduction gyroscope accordingly, achieving energy saving in low sea states and high angular momentum reserve in high sea states. The inner loop uses the platform motion state, gyroscope motion state, environmental load intensity index, and phase difference to form a state vector, which is input to an intelligent controller trained based on a soft actor-critic algorithm. This controller collaboratively outputs a variable damping coefficient and active precession torque, achieving phase adjustment, amplitude control, and safety constraints for the roll reduction gyroscope's precession response. This invention also provides a corresponding control system and model deployment method. This invention can significantly reduce the pitch response of floating wind turbine platforms under random sea states, reduce the risk of mechanical limit impacts, and balance energy-saving operation in low sea states with control capability reserves in high sea states.

The application discloses a kind of for directly unloading pressure of superhigh pressure area step unloading valve control device and method, including step unloading valve, motor, with the induction rod of step unloading valve synchronous rotation, inductive switch and hydraulic control system.Hydraulic control system output pulse and control motor drive step unloading valve rotation from homing point to carry out pressure relief, and real-time cumulative calculation is carried out to output pulse, whenever induction rod reaches the position of reference point, and hydraulic control system receives the reference point position signal sent by inductive switch and carries out the step loss amplitude control of step unloading valve.The control method and system in the application are based on the number of hydraulic control system output pulse cumulative real-time calculation step unloading valve open-close circle number, and increase reference point correction function, can accurately control the step loss amplitude of step unloading valve, and provide step loss amplitude detection, automatic correction and step loss amplitude exception when automatic alarm, improve the reliability of step unloading valve in pressure relief process control.

A control device is provided. In step S110, the control circuit (30) turns on the semiconductor switches (SW1, SW4) continuously. In step S170, the control circuit (30) turns on the semiconductor switches (SW2, SW3). The control circuit (30) calculates a temperature rise amplitude (ΔTa) that is generated in association with the control processing of step 110, based on the current (Ia). The control circuit (30) calculates a temperature rise amplitude (ΔTb) that is generated in association with the execution of the control processing of step S170, based on the current (Ib). The control circuit (30) calculates the temperature of the electric wire (60a, 60b) taking into account the temperature rise amplitude (ΔTa) and the temperature rise amplitude (ΔTb). The control circuit (30) turns off the semiconductor switches (SW1 to SW4) when it is determined based on the temperature of the electric wire (60a, 60b) that an overcurrent is flowing in the electric wire (60a, 60b).

A pipe end blanking control mechanism for a steel pipe curtain spreading and coating machine includes a hopper mechanism (10), a gap control mechanism (20), and a width control mechanism (30). The gap control mechanism (20) forms a material drop gap (14) for adjusting the material drop width W of the material drop gap (14). 隙 The gap control mechanism (20) includes a fixed cam roller (21) and a rotatably mounted movable cam roller (22), forming a material drop gap (14) between the fixed cam roller (21) and the movable cam roller (22); the width control mechanism (30) simultaneously abuts against the fixed cam roller (21) and the movable cam roller (22) of the gap control mechanism (20), and moves along the material drop gap (14) in the same direction and at the same speed as the steel pipe to control the material drop width L of the material drop gap (14). 落 The tube end blanking control mechanism, in conjunction with the suction control mechanism and the amplitude control mechanism, allows the width and length of the material drop gap to be adjusted independently, automatically achieving tube end blanking.

The present application relates to the field of harvesting machines, in particular to a 3D cleaning system with a transverse vibration device and a combine harvester. Since the sensor directly detects the transverse amplitude value of the upper sieve box component, the error caused by detecting intermediate variables is avoided, and the accuracy and reliability of obtaining the transverse amplitude data are improved. The controller determines the difference between the transverse amplitude value and the theoretical amplitude value. In the case where the difference is greater than the preset value, the sensor controls the linear drive to drive the transverse vibration assembly to rotate. In this process, the telescopic end of the linear drive produces linear telescopic motion, thereby pushing the transverse vibration assembly connected thereto to rotate around the connection point, so that the transverse amplitude value is equal to the theoretical amplitude value. By adopting the closed-loop control mode to adjust the transverse amplitude value, the amplitude control precision of the transverse vibration assembly is improved, so that the material is more evenly distributed on the screen surface of the upper sieve box component, thereby enhancing the cleaning effect of the upper sieve box component.

According to one embodiment, a power amplifier comprises a power amplifier core unit capable of performing amplitude control in discrete integer steps and a variable attenuator. The power amplifier core unit performs the amplitude control to reproduce the envelope of an RF signal. The variable attenuator varies the attenuation amount and controls the average transmit power using a combination of the amplitude control performed by the power amplifier core unit and the attenuation amount of the variable attenuator.

The present disclosure relates to a power conversion system. The power conversion system includes a power converter that converts direct-current power into alternating-current power; an alternating-current terminal to which the alternating-current power from the power converter is supplied via an LC filter; a switch that is provided between the alternating-current terminal and an alternating-current supply path; a voltage detection unit that detects a voltage of the alternating-current terminal; a current detection unit that detects a current of the alternating-current terminal; a virtual synchronous generator control unit that sets a frequency of the voltage of the alternating-current terminal based on active power; an amplitude control unit that sets an amplitude of the voltage of the alternating-current terminal; a voltage command unit that generates a voltage command value of the alternating-current terminal based on the frequency of the voltage of the alternating-current terminal; and a current limit unit that corrects the voltage command value to reduce the current of the alternating-current terminal.

The present application relates to the technical field of geophysical environment exploration, and specifically discloses a frequency-domain controllable source electromagnetic emission pulse amplitude control method and system, the method comprising constructing a pseudo-random pulse sequence basic framework and an exploration target adaptive spectral function curve according to exploration requirements; in the basic framework, the lowest frequency of each basic unit adopts adaptive frequency error design, and the basic unit is composed of a series of sine waves with different frequencies; the pseudo-random pulse sequence is subjected to frequency spectrum ratio-based iterative amplitude adjustment, so that the frequency spectrum amplitude approximates the expected spectral function curve; the time domain waveform of the amplitude-adjusted pseudo-random pulse sequence is subjected to amplitude limiting to generate a bipolar pseudo-random pulse; the present application realizes combination of different frequency point amplitudes by nonlinear control of emission pulse spectral distribution, improves measurement precision, and expands the emission pulse excitation range.