22 results about "Active feedback" patented technology

The invention belongs to the technical field of hypersonic flight vehicle control, and relates to a rigid-elastic coupling-oriented active and passive integrated control method for a hypersonic flight vehicle. The invention aims to realize stable tracking control of the elastic hypersonic flight vehicle. The method comprises the following steps: constructing a longitudinal dynamic model of the elastic hypersonic aircraft; self-adaptive identification of the elastic vibration frequency is realized through a cascaded self-adaptive filter; an elastic modal filtering estimation method is designed, and high-precision and low-cost elastic modal state quantity is provided for subsequent active feedback controller design; and then rigid-elastic coupling model decomposition is carried out, the control performance is ensured by using active disturbance rejection passive control for a rigid body subsystem, an RBF neural network is introduced for an elastic subsystem, an elastic mode is actively inhibited by using sliding mode control, and stable tracking of a reference instruction is realized. The method is an active and passive integrated control method for the hypersonic flight vehicle oriented to rigid-elastic coupling, and the application prospect is wide.

Disclosed are systems and techniques to improve coherence of qubits experiencing fluctuating electric potential caused by the environment. In some implementations, a processing device implementing the disclosed techniques includes a first (second) qubit structure formed using a first (second) set of electrodes electrostatically confining a first (second) electron in a direction lateral to a film, the film including a condensed phase of one or more inert gas elements. The processing device further includes a feedback circuitry to subject the first qubit structure to a probe signal, receive a response signal caused by an interaction of the probe signal with the first qubit structure, generate, using the response signal, a correction signal, and subject the first qubit structure and the second qubit structure to the correction signal.

An active feedback RF resonator has a signal loop having a signal input and a signal output. The signal loop has a variable gain stage and at least one variable resonator, each variable resonator comprising an inductance element and a variable capacitance element comprising a number of switched fixed value capacitors and a variable capacitor. A phase noise of the active feedback RF signal has a maximum value for an operating frequency of the variable resonator that is based on an operating range of the variable capacitor.

The application discloses a communication flow control method, device and equipment and a storage medium, and relates to the technical field of communication flow control, and specifically discloses the following technical scheme: a step sequence corresponding to a to-be-executed communication flow and a conditional transfer rule are acquired; a target primitive instance matched with a current flow step is acquired from a preset primitive pool, and the target primitive instance is activated; the target primitive instance is driven to execute an asynchronous communication operation, and a step execution result and a condition identifier fed back by the target primitive instance are received; a target step is determined from the step sequence according to the step execution result, the condition identifier and the conditional transfer rule, and the current flow step is updated to the target step. According to the application, the step sequence corresponding to the to-be-executed communication flow and the conditional transfer rule are acquired, and the asynchronous operation and the active feedback execution result are encapsulated by using the primitive instance. Compared with the prior art, the application reduces the state management complexity, eliminates the logic fragmentation, and thus improves the development and maintenance efficiency of the embedded communication flow.

This invention proposes a high-gain, high-linearity amplifier circuit, mainly comprising an input circuit and an output circuit. The input circuit has high gain, converting the received input voltage into current and amplifying it. The input circuit transmits the amplified current to the output circuit. The output circuit generates an output voltage and reduces the input impedance of the input circuit through its included feedback loop. The feedback loop in the output circuit also stabilizes the gain of the entire circuit system and optimizes the system linearity. This invention significantly improves the system gain through the amplifier circuit structure and the back-gate coupled circuit structure, and optimizes the system linearity by setting passive and active feedback loops. This invention achieves both high gain and high linearity.

The invention discloses a test feedback method, and relates to the technical field of test feedback, and the method comprises the steps: determining a corresponding first test task and a first test server after a first voice instruction is received, sending a first test instruction carrying a test script to the first test server, and enabling the first test server to execute the first test task, monitoring the execution state of the first test task in real time, determining a first feedback strategy according to a target exception type when the target exception type is detected, and sending the corresponding feedback content to a specified first feedback device; according to the method, by establishing an automatic feedback mechanism of voice instruction triggering, state monitoring, anomaly classification, strategy matching and active feedback, the technical problem that in the prior art, due to the fact that a test result is manually inquired, anomaly information cannot reach a tester in time, and anomaly processing is delayed is solved; the technical effect of improving the abnormal response speed and the test feedback efficiency is achieved.

The present disclosure relates to an adjustable mechanical motion range limitation apparatus being configured for arrangement between a pair of linkage members of a haptic device and comprising a mechanical motion limitation device being moveable, independently from the active feedback device, in relation to the first linkage members, and having, in relation to the first linkage member, a lock position in which the first mechanical motion limitation device limits, by mechanical contact, an available motion range between the first linkage member and the second linkage member.

An active filter device is provided that solves the problems of the so-called Π-noise filter and can achieve good noise suppression from the low-frequency range to the high-frequency range. An active filter device 1 comprises a common-mode choke 28 inserted into a pair of power supply lines 11, 12, Y-capacitors 61, 62 of the front stage of the common-mode choke 28, an active feedback compensation voltage output circuit 23 comprising a detection unit 29 that detects the common-mode voltage, and an inverting amplification circuit 37 that inverts and amplifies the common-mode voltage detected at the detection unit, and Y-capacitors 21, 22 of the rear stage between the output of the inverting amplification circuit and the common-mode choke, wherein the output voltage of the inverting amplification circuit is applied to the Y-capacitors of the rear stage as a compensation voltage.

The application provides an active feedback-based interference scattering tracking imaging device and method, relates to the optical technology field, and aims to realize real-time tracking imaging of a target object without labeling. In the tracking imaging device, a laser generates laser light, a laser focus modulator controls laser scanning to form a laser scanning area; a displacement table is configured to drive the target object to scan in the laser scanning area, so that the target object generates a scattering signal; the scattering signal interferes with reflected light of the laser to generate an interference scattering signal; a photodetector is configured to convert the interference scattering signal into a detection electric signal; and a controller is configured to obtain a real-time motion position of the target object according to the detection electric signal and a scanning position of the laser.

The present invention provides a method and apparatus for generating RF signals. [Solution] A method and apparatus for generating an RF signal uses digital signal components to generate a composite RF signal having multiple frequency components. An analog filter is used to filter the composite RF signal. The analog filter is an adjustable active feedback circuit having one or more variable resonators and a variable gain block connected to a signal loop defined by a passband. The analog filter is adjusted so that the passband of the analog filter overlaps with one or more desired frequency components of the multiple frequency components of the composite RF signal, and the passband has a relative bandwidth of about 1% or less.

The present disclosure relates to an active-feedback, speed-adjustable, low-power voltage regulator for a high-voltage energy harvester. According to one aspect of the present invention, the voltage regulator comprises: a comparator for comparing, to the reference voltage, a feedback voltage generated by stepping down the output voltage of the voltage regulator by a predetermined ratio; and a feedback circuit that outputs, according to the comparison result of the comparator, a feedback signal for adjusting the output voltage to a target voltage, wherein the comparator dynamically adjusts the comparison speed according to a voltage difference between the feedback voltage and the reference voltage and the feedback circuit adjusts the reference voltage according to the voltage difference.

An amplifier circuit is provided. The amplifier circuit includes a first transimpedance amplifier and a first transconductance amplifier. The first transimpedance amplifier is to receive a first input signal. A first input of the first transconductance amplifier is coupled to a first output of the first transimpedance amplifier. The first transconductance amplifier includes a first passive feedback structure and a first active feedback structure. The first passive feedback structure includes a first resistor coupled between the first output of the first transimpedance amplifier and the first input of the first transimpedance amplifier. The first active feedback structure includes a first inverter having an output coupled to the first input of the first transimpedance amplifier. This configuration optimizes the gain-bandwidth product and stability of the amplifier circuit.

A front-end circuit for an optical counting component is provided. The front-end circuit includes: a signal amplifier configured to operate in a first phase (offset compensation) and a second phase (output phase); a feedback capacitor coupled in parallel to the signal amplifier; and an active feedback circuit comprising an auto-zero (AZ) active feedback amplifier configured to be coupled in parallel to the feedback capacitor in the second phase and isolated from the feedback capacitor in the first phase. The active feedback amplifier is configured to operate in an output phase corresponding to the second phase and an auto-zeroing (AZ) phase corresponding to at least a portion of the first phase. The active feedback circuit is configured to automatically zero the active feedback amplifier in the AZ phase.

The application discloses a kind of distributed energy systems and control method, system includes: converter and controller;The input end of converter is used to connect renewable energy, renewable energy is photovoltaic component and / or fan;Converter has droop characteristic or virtual synchronous machine characteristic;Controller is used to detect the electrical parameter of converter, electrical parameter includes voltage, power or frequency;According to the comparison result of electrical parameter and preset value and load priority, the switching of load is controlled.For better match the relationship between load and power supply, without the active feedback of the state of load, the application detects the electrical parameter of converter, controller compares the electrical parameter of converter with preset value, according to the comparison result and load priority, to automatically control the switching of load in distributed energy system.Balance the relationship between power supply and load, so that power reaches balance, and can guarantee that priority high load is powered on priority, guarantee priority high load normal operation.

The invention discloses a gas-water separation active feedback control module of a dental chair and a feedback control method, and relates to the technical field of dental chairs, the gas-water separation active feedback control module comprises a gas path and water path sub-module, an isolation module, a differential pressure feedback control module, a terminal feedback unit and a central control unit; the gas path sub-module and the water path sub-module are respectively and sequentially provided with an inlet, a proportional valve, a pressure sensor, a flow sensor and a one-way valve along respective fluid paths, and are independently isolated by an isolation module with a neutral isolation layer; the differential pressure feedback control module collects air pressure and water pressure in real time and calculates differential pressure, the differential pressure is compared with a preset threshold value, and the opening degree of the proportional valve is automatically adjusted to maintain balance. The terminal feedback unit is used for detecting return voltage and feeding back a control signal; the central control unit executes closed-loop adjustment based on real-time data, and gas-water proportion self-adaption and dynamic stable output are achieved; complete isolation and differential pressure active compensation control of a gas-water system are achieved, and the water-gas injection stability, safety and intelligent level of the dental chair are improved.

The utility model relates to the technical field of flexible clamps, in particular to a universal clamp of a robot arm, which comprises a base, a clamping jaw is fixedly mounted at the bottom of the base, a piezoresistive sensor is mounted on the inner side of the clamping jaw in an embedded manner, and a camera is mounted at the bottom of the base in an embedded manner; the shape memory alloy wires are embedded in the inner cavity of the non-Newtonian fluid to form the clamping jaws, the non-Newtonian fluid has good flexibility, the shape memory alloy wires can deform after being electrified and heated, and the four clamping jaws can draw close to the inside to clamp articles by controlling collision of the shape memory alloy wires. Precise clamping can be achieved through cooperation of the visual recognition technology of the camera and the clamping jaw, the pressure borne by the inner side of the clamping jaw can be monitored in real time through cooperation of the piezoresistive sensor, and therefore the clamping jaw can stably clamp special-shaped or soft objects; the problem that a mechanical telescopic rigid structure clamp is not enough in adaptability to active feedback and workpieces is solved.

This invention relates to the field of precision displacement control technology, specifically to an electric microscope stage with a limiting structure, comprising a drive motor, a lead screw, a slide, and an overload floating protection component. The overload floating protection component is connected between the lead screw and the slide, and includes a floating sleeve, a threaded seat, and a preload elastic component. The threaded seat is threadedly connected to the lead screw and is axially supported within the floating sleeve by the preload elastic component. During normal operation of the slide, the preload force provided by the preload elastic component ensures the transmission rigidity between the threaded seat and the slide. When the slide collides and is obstructed, the resistance overcomes the preload force, causing the threaded seat to undergo axial displacement, providing physical buffering for the slide. Simultaneously, an inductive switch monitors this relative displacement to immediately cut off the drive power. This invention changes the traditional rigid transmission mode, effectively avoiding damage to the mechanism and external equipment caused by continuous high loads from collisions through physical buffering and active feedback mechanisms, thus improving operational safety.

The present disclosure provides systems and methods for FSO systems using active feedback noise reduction for light transmitted through a variably refractive medium. A telescope receives an inbound beam of light. A detector system includes a routing system, a noise reduction system, and a first detector. The noise reduction system has a splitter, a second detector, a controller, and a modulator. The second detector generates a sampled signal from a first portion of the inbound beam. The controller generates a control signal based on the sampled signal. The modulator attenuates a second portion of the inbound beam based on the control signal before detection by the first detector, thereby reducing variable noise caused by the variably refractive medium.

The present disclosure provides systems and methods for FSO systems using active feedback noise reduction for light transmitted through a variably refractive medium. A telescope receives an inbound beam of light. A detector system includes a routing system, a noise reduction system, and a first detector. The noise reduction system has a splitter, a second detector, a controller, and a modulator. The second detector generates a sampled signal from a first portion of the inbound beam. The controller generates a control signal based on the sampled signal. The modulator attenuates a second portion of the inbound beam based on the control signal before detection by the first detector, thereby reducing variable noise caused by the variably refractive medium.

An oscillator Isin machine with linear coupling comprises a pair of ring oscillators provided with oscillator copying units and a coupling unit, the ring oscillators are oppositely arranged and identical in structure, and the two sides of the coupling unit are connected with the ring oscillators and the corresponding oscillator copying units respectively. The interaction intensity and symbols between the oscillators are completely determined by control words and switch states, no transconductance amplifier or bias current or active feedback circuit is needed, high-linearity coupling adjustment is achieved on the premise that the full-passive characteristic is kept, and a strict linear relation is formed between coupling conductance and control codes; and high-precision coupling matrix mapping can be realized under purely passive, linearly adjustable and differential symmetric conditions.

A front-end circuit for a photon counting component is provided. The front-end circuit comprises a signal amplifier configured to operate in a first phase (offset compensation) and a second phase (output phase), a feedback capacitor connected in parallel with the signal amplifier, and an active feedback circuit including an auto-zero (AZ) active feedback amplifier connected in parallel with the feedback capacitor in the second phase and configured to be isolated from the feedback capacitor in the first phase. The active feedback amplifier is configured to operate in an output phase corresponding to the second phase and an auto-zero (AZ) phase corresponding to at least a portion of the first phase. The active feedback circuit is configured to auto-zero the active feedback amplifier in the AZ phase.

The invention relates to an active-passive feedback combination-based large pathological model online fine tuning method and system, and the method comprises the steps: marking an active feedback mark as a difficult case when the active feedback mark is abnormal or the semantic similarity is lower than a threshold value, dividing the difficult case into multiple levels: medium, high and extremely high according to the Euclidean distance, sampling the difficult case data according to the difficulty weight in an equal ratio during the idle period of the system, and carrying out the sampling of the difficult case data; the method comprises the following steps of: selecting a model, mixing easy example data in a preset proportion, freezing the weight of a Patch feature extractor of the model, only finely tuning a multi-instance learning MIL head network, introducing historical data playback and regularization constraints, and superposing a LoRA module on the MIL head, so that parameter updating is satisfied, performance improvement of the model on a test set after fine tuning needs to reach statistical significant difference, and the weight is updated and the data is filed.