78 results about "Analog feedback" patented technology

The invention discloses a propolis liquid quality detection data processing method and system, and relates to the technical field of data processing.The method comprises the steps that spectral data of a batch of propolis liquid to be detected is obtained, the content of symbolic components is analyzed, and production stage parameters are obtained; the technical key points are as follows: dynamic correction of a threshold value is realized through simulation feedback, a balance point is found between detection accuracy and efficiency, on one hand, a correction coefficient and feedback rate comparison mechanism is introduced, and whether threshold value correction needs to be performed or not is intelligently judged according to a simulation feedback result; the problem that the detection efficiency is reduced due to redundant correction actions is effectively avoided, and simplification and high efficiency of the detection process are ensured; and on the other hand, when the correction feedback displays a better result, secondary correction can be accurately performed on the adaptive threshold value, and the adaptive adjustment mechanism enables the threshold value setting to be closer to the detection requirement, so that the influence of parameter adjustment on the adaptive threshold value is reflected more comprehensively, and the detection accuracy is further improved.

Signal processing is applied to a digital input audio signal. An analog audio output signal is provided based on the digital input audio signal via a switching converter circuit driven by a PWM signal. The analog audio output signal is sensed to generate an analog feedback signal. The applied signal processing includes: producing a digital error signal indicative of a difference between the digital input audio signal and a digital word signal; applying digital-to-analog conversion to the digital error signal to produce an analog replica of the digital error signal; producing an analog difference signal indicative of a difference between the analog replica of the digital error signal and the analog feedback signal; applying analog-to-digital conversion to the analog difference signal to produce the digital word signal; applying digital filtering to the digital word signal to produce a filtered digital word signal that generates the PWM signal.

The invention discloses a situation simulation method and system based on a vehicle-mounted large language model, and belongs to the technical field of vehicle-mounted artificial intelligence, and the method comprises the steps: carrying out simulation situation construction and role setting based on a simulation situation type and a role selected by a user, and generating a virtual dialogue scene; voice features and emotional states of the user are analyzed, and simulation situation construction and role setting are dynamically adjusted; according to the voice features and the emotional state, selecting a proper voice synthesis role from a vehicle-mounted voice database to represent the voice of the role of the opposite side; based on the language and the expression content of the user, using a large language model to generate words and logics of the role of the opposite side; and real-time situational simulation feedback of the opposite role is provided according to the synthesized role and the generated words and logics of the opposite role in combination with real-time analysis of the voice feature and the emotional state of the user. The method helps the user to improve the expression ability and emotion management ability in a specific scene. A user is allowed to select an interested simulation situation from a preset situation library.

The utility model discloses a worm type steer-by-wire device which comprises a moment road sense feedback device, a steering column comprises a spline shaft, and one end of the spline shaft is connected with a steering wheel. The torque feedback assembly comprises a first gear shaft, an angle torque sensor, a motor, a worm and a worm gear. The first gear shaft is connected with the spline shaft. The angle torque sensor is installed on one side of the first gear shaft. The worm gear is mounted on the first gear shaft; a worm matched with the worm gear is arranged at the output end of the motor. Detecting the torque and angle of the steering wheel through an angle torque sensor; according to the detected torque and angle, a feedback torque is simulated through a motor, a worm and a worm gear, and linear steering control can be realized through simulating and adjusting steering damping through the motor; mechanical decoupling between the steering wheel and the steering actuator is achieved, the steering hand feeling is improved, and personalized driving requirements can be met.

The invention discloses a drive-by-wire system with redundancy safety, which is applied to engineering machinery and is characterized by comprising a redundancy steering module, a redundancy braking module and a control module, the redundant steering module is used for limiting the number of turns of a steering wheel of the vehicle through a limiting unit and carrying out simulation feedback on road feel by arranging a resistance feedback unit; and the redundant braking module is used for carrying out three-in-one combined braking of electric braking, hydraulic service braking and parking braking on a braking system of the vehicle. The device is compact in structure, safe, reliable and convenient to control, steering limiting and motor resistance torque increasing are adopted, and the steering performance of the drive-by-wire chassis can be guaranteed; meanwhile, a redundant design of an angle sensor and a displacement sensor of the steering oil cylinder is adopted, so that the steering safety is ensured; the safety redundancy design of service braking, parking braking and electric braking is adopted, and the safety of service braking and parking braking is guaranteed; and the driving safety of the drive-by-wire chassis is ensured.

The present application discloses an analog-to-digital conversion circuit, a chip, and a recording device. The analog-to-digital conversion circuit comprises a main path module, a dynamic range enhancement module, and a dynamic digital-to-analog conversion module. The main path module is used for converting an analog signal and an analog feedback signal into a digital signal to be processed for outputting to the dynamic range enhancement module, and obtaining a digital signal on the basis of the digital signal to be processed and a digital gain signal and outputting the digital signal. The dynamic range enhancement module is used for performing dynamic quantization processing on the digital signal to be processed to obtain a control signal, and generating the digital gain signal. The dynamic digital-to-analog conversion module is used for, on the basis of the control signal, dynamically controlling the activation and deactivation of each DAC element in a digital-to-analog conversion array, and generating an analog feedback signal. According to the analog-to-digital conversion circuit of the present application, the need for a front-end fixed-gain OPA is eliminated, reducing power consumption and reducing costs; moreover, dynamically controlling the activation and deactivation of each DAC element in the digital-to-analog conversion array further reduces the power consumption.

The invention discloses a laser main control board performance test system and a test tool, and relates to the technical field of laser testing, and the system comprises a power supply simulation input circuit, an upper computer simulation control circuit, a light emitting simulation feedback circuit, a light emitting detection circuit and a signal processing circuit. The power supply simulation input circuit simulates the power supply input of a real laser, the upper computer simulation control circuit simulates and controls the upper computer of the real laser, and the light output simulation feedback circuit simulates the light output and feedback of the real laser, so that the to-be-tested main control board works. A light-emitting control signal is generated and post-processing is carried out based on a light-emitting feedback signal, then light-emitting power and an output power feedback signal of the simulation laser are collected through a light-emitting detection circuit, signal processing is carried out through a signal processing circuit, and a test result is obtained and displayed. According to the invention, the simulation laser is constructed based on the to-be-tested main control board and a simple circuit structure, so that the rapid performance of the main control board can be tested.

The invention discloses a control method and system for a hydraulic system of a tunnel secondary lining trolley, and the method comprises the steps that when the tunnel secondary lining trolley stops and does not work, a PLC obtains a self-checking starting instruction, and outputs a driving signal to each electromagnetic valve; the electromagnetic valve is driven to act to enable the corresponding oil cylinder to generate detection-level displacement which can be collected by the displacement sensor and does not change the working state of the corresponding template; the PLC associates and matches a driving signal output time sequence with an acquired displacement information acquisition time sequence, and establishes an actual mapping relation between a digital quantity output channel and an analog quantity feedback channel to identify the connection state of the oil pipe and the electromagnetic valve; and the PLC updates the association logic of the remote controller instruction and the digital quantity output channel based on the actual mapping relation. According to the scheme, the actual channel mapping relation is established through self-checking, the control logic is updated, the problem of control failure caused by connection dislocation of the oil pipe and the electromagnetic valve is solved, it is ensured that the remote controller can accurately control the target oil cylinder, and the control reliability of a hydraulic system and the operation safety of a trolley are improved.

An evaluation device for evaluating a result of machining includes a numerical control simulation unit that simulates a numerical control device, and outputs a position command to a drive shaft of the machine tool. Further, there is a servo control simulation unit that simulates the servo control device based on the position command and outputs a torque command to the drive shaft; a drive shaft simulation unit that simulates the drive shaft based on the torque command, and a machining result evaluation unit that evaluates a machining result based on information corresponding to an operation of the drive shaft. The drive shaft simulation unit outputs position information indicating a position of the drive shaft, the servo control simulation unit performs feedback control of the drive shaft simulation unit by using the position information, and the machining result evaluation unit evaluates a machining result obtained when the feedback control is simulated.

A device, method, and system for signal distortion pre-correction, and a composite system are disclosed. The device-includes: a signal distortion correction network module, a correction parameter trainer, a data collection module connected to an external power amplifier module, and a first conversion module. The data collection module is configured to perform time-division collection on output signals of channels of the power amplifier module and output analog feedback signals to the first conversion module. The first conversion module is configured to convert the analog feedback signals into digital feedback signals. The correction parameter trainer is configured to determine a correction parameter according to the digital feedback signals and a forward signal inputted. The signal distortion correction network module is configured to correct the forward signal based on the correction parameter and output a pre-corrected signal.

The system according to this embodiment aims to enable users to practice effective proposal methods and negotiation strategies in advance, based on the characteristics of their clients' representatives. [Solution] The system according to the embodiment comprises a reception unit, a learning unit, a generation unit, a simulation unit, and a feedback unit. The reception unit inputs information of the contact person of the business partner. The learning unit learns based on the information input by the reception unit. The generation unit generates advice and suggestions based on the data learned by the learning unit. The simulation unit performs a dialogue simulation based on the advice and suggestions generated by the generation unit. The feedback unit inputs feedback on the dialogue performed by the simulation unit.

The present application discloses a vehicle-mounted adaptive microphone audio gain method, apparatus, equipment and storage medium, relating to the technical field of vehicle-mounted electronic equipment. The present application includes: determining a business scenario of an application, determining a target digital gain value and a target analog gain value of the received microphone audio according to the business scenario, performing analog gain on the microphone audio to obtain an analog gain value, performing digital gain on the microphone audio to obtain a digital gain value, comparing the analog gain value with the target analog gain value and the digital gain value with the target digital gain value, respectively, to obtain an analog feedback gain value and a digital feedback gain value, and gaining the microphone audio according to the analog feedback gain value and the digital feedback gain value to obtain microphone gain audio, which can enhance the sensitivity of the microphone and facilitate adaptive adjustment of the required microphone audio gain for various applications on the vehicle system.

The present invention discloses a PID control system and method, relating to the technical field of PID control. A signal acquisition module acquires analog signals; the analog signals include an analog reference signal and an analog feedback signal; a processing module converts the analog reference signal into a digital reference signal; converts the analog feedback signal into a digital feedback signal; performs a difference calculation on the digital reference value, the digital feedback value and a first interference value to obtain a first output value; performs a difference calculation on the first output value, the feedback value and a second interference value to obtain a second output value; a PID control module obtains three constants according to the second output value; obtains a third output value according to the second output value and the three constants; an HMI module is used to set parameters, display output values and parameters. The present invention improves the adjustment efficiency of the parameters of the PID control system and reduces the oscillation generated by the PID control system.

The invention relates to the technical field of xenon lamp power supply control, in particular to a xenon lamp power supply adaptive structure based on analog control. According to the technical scheme, the circuit comprises a rectification filtering module, an LCC half-bridge resonance circuit, a transformer, a voltage doubling circuit, a full-bridge rectification circuit and a control unit which are connected in sequence. A primary coil of the transformer is connected with the LCC half-bridge resonance circuit, and two secondary coils of the transformer are respectively connected with the input end of the voltage doubling circuit and the input end of the full-bridge rectification circuit; and the output end of the voltage doubling circuit is coupled to an upper bridge arm node of the full-bridge rectifying circuit. Through combination of high-frequency resonant topology and analog feedback control, the xenon lamp trigger voltage self-adaptive adjustment and millisecond-level pre-combustion state accurate switching are realized while the power supply volume (a high-frequency transformer replaces an industrial frequency transformer) is remarkably reduced, the defects of large volume and high loss of a traditional scheme are overcome, and the reliability of the xenon lamp trigger voltage self-adaptive adjustment and millisecond-level pre-combustion state accurate switching is improved. And the pre-combustion success rate is improved, the switching loss is reduced, and the reliability, the energy efficiency and the adaptability of the xenon lamp power supply are comprehensively optimized.

This invention provides a control channel multiplexing and docking method, apparatus, computer equipment, and medium based on a high-speed network, comprising: configuring a logical channel connected to the control system for each test site and dynamically setting IP routing mapping relationships; converting analog feedback signals output by sensors at the first test site into digital feedback signals, encapsulating them, and transmitting them to the test control room via a high-speed real-time network; receiving a first data packet, decapsulating it, converting it into an analog feedback signal, and inputting it to the control system; converting analog control commands issued by the control system into digital control commands, encapsulating them, and transmitting them to the first test site via a high-speed real-time network; decapsulating a second data packet according to its destination IP address, converting it into an analog control command, and outputting it to the actuator; updating the IP routing mapping relationship and switching the logical channel connection when switching test sites. This enables the hardware resources of a control system to be reused.

A level of thrust generated in a linear drive system is monitored by receiving an analog feedback signal at a controller from a position sensor mounted along a track for the linear drive system. The analog feedback signal varies as a function of a position of a mover traveling along the track, and the controller receives the analog feedback signal as the mover travels between a first position and a second position proximate the position sensor. An amplitude of the analog feedback signal corresponds to a value of thrust generated by the linear drive system for the mover. A change in the analog feedback signal from a nominal value of the analog feedback signal for the mover is detected as the mover travels between the first and second positions. Operation of the linear drive system is adapted when the change in the analog feedback signal exceeds a predefined threshold.

A Sigma Delta analog-to-digital converter (ADC) and a method for eliminating idle tones of the Sigma Delta ADC are provided. The Sigma Delta ADC includes a loop filter, a quantizer, an adder and a digital-to-analog converter (DAC). The loop filter performs filtering on a difference between an analog input signal and an analog feedback signal to generate a filtered signal. The quantizer is coupled to the loop filter, and generates a digital output signal according to the filtered signal. The adder is coupled to the quantizer, and adds a digital dithering signal to the digital output signal to generate a digital feedback signal. The DAC is coupled to the loop filter, and generates the analog feedback signal according to the digital feedback signal.

The invention discloses a radio frequency matcher control terminal which comprises a key module, a display module, an ADC sampling module, an analog interface, an MCU control module, a DAC output module and a digital interface. The key module is used for receiving menu selection, confirmation and function switching; the display module is used for displaying menu content and corresponding parameter information; the ADC sampling module is used for collecting analog feedback voltages of the TUNE capacitor and the LOAD capacitor; the analog interface is used for realizing analog signal interaction between the control terminal and an external matcher; the MCU control module is used for analyzing various input instructions, processing acquired signals and controlling the modules to work cooperatively and transmit data; the DAC output module is used for outputting feedback voltage for capacitor position adjustment to the analog interface according to an instruction of the MCU control module; and the digital interface is used for realizing digital signal interaction between the control terminal and an external matcher. Multi-mode control of the matcher is achieved, and the problems that an existing matcher is single in operation, inconvenient to switch and insufficient in remote control are solved.

The present application relates to switching power supply and DC voltage stabilizing power supply technical field, particularly to a kind of non-isolated double-state voltage stabilizing power supply control method, device and system.The device is sampled output voltage signal, after by digital discrete level transmission, by double-state comparison control unit based on preset upper and lower limit threshold value is completed discrimination, output low gear instruction, high gear instruction or gear keep instruction, drive gear selectable drive unit corresponding implementation lower speed energy conversion, higher speed energy conversion or maintain current speed energy conversion, realize output voltage stabilization.The present application overall adopts digital control architecture, without error amplifier, loop compensation network, completely discard traditional analog feedback loop, from root avoid loop temperature drift, phase lag, loop oscillation and other defects, with circuit extremely simple, response fast, strong anti-interference, long-term reliability high characteristics.

The present application relates to a kind of proportional reversing valve control drive circuit, belong to proportional reversing valve control drive technical field, solve the problem that proportional reversing valve control drive circuit is mostly one-way drive. Including: digital-analog conversion circuit, receives digital given control signal and carries out digital-analog conversion, obtains corresponding analog given control signal;The positive and negative of corresponding digital given control signal and analog given control signal are same;Forward analog feedback control circuit, based on the forward analog given control signal received and the forward current sampling signal obtained from the positive connection terminal of proportional reversing valve generates forward deviation control signal, and the forward deviation control signal is carried out pulse width modulation, amplification drive, generates the forward valve drive signal for controlling the positive connection terminal of proportional reversing valve;Reverse analog feedback control circuit, based on reverse analog given control signal generates the reverse valve drive signal for controlling the negative connection terminal of proportional reversing valve.

A microelectromechanical system with a micromechanical rotation rate sensor and at least one drive control unit. The micromechanical rotation rate sensor includes a drive unit. The at least one drive control unit includes a first part. The first part includes at least one demodulation unit, wherein analog demodulation of at least one analog feedback signal of the drive unit can be carried out by the at least one demodulation unit of the first part of the drive control unit.

An automatic level control (ALC) circuit includes an input configured to receive a radio frequency (RF) input signal, a level control circuit coupled to the input and configured to control a level of the RF input signal in response to a feedback signal, and an output coupled to the level control circuit and configured to output a level-controlled RF output signal. The ALC circuit further includes a feedback path coupled to the output and configured to sample the level-controlled RF output signal to determine an error detected in the level-controlled RF output signal, and to generate the feedback signal in accordance with the error. The ALC circuit still further includes a feedforward path coupled to the input and configured to emulate a frequency response in the feedback path and to adjust the error determined in the feedback path according to the emulated frequency response.

Disclosed is a thermal stabilization circuit including a heater, which is adjacent and thermally coupled to a closed-curve waveguide of an optical ring resonator, and an analog feedback circuit, which includes a fully autonomous analog feedback loop from a drop port of a bus waveguide of the optical ring resonator to the heater. This analog feedback circuit is configured to dynamically control the electrical power provided to the heater and, thereby to dynamically control the thermal output of the heater in order to tune the ring resonance wavelength to the operating laser wavelength. The analog feedback circuit is further configured to be independent of input power, to be power efficient, to have a relatively small footprint, to have a tunable time constant and to facilitate adjustable wavelength locking. Also disclosed is a device (e.g., a ring-based transceiver or the like), which includes multiple optical ring resonators and corresponding thermal stabilization circuits.

The aim of the invention is rapid automatic tuning the parameters of a digital proportional-integral-derivative (PID) controller by analog feedback of an actual value for automation of technological processes with programmable logic controllers (PLCs).The proposed invention is based on the use of nine tuning equations derived by reverse engineering of a PID controller.Adjusting the PID controller parameters Kp, Ki and Kd is performed in a closed control loop with negative feedback separately in time, i.e. independently of each other in iteration steps k for Kp, m for Ki and n for Kd (see FIG. 1).The adaptive tuning method is compact, independent of other methods and algorithms, mathematically balanced (i.e. minimal computational resource requirements), and easy to implement.Setting up a PID controller by this method does not require a preliminary evaluation of a controlled system and the creation of its mathematical model. This implies its universal applicability.

The application discloses a sensor signal sampling circuit, a method and a sensor, and relates to the technical field of sensors. The sensor signal sampling circuit comprises a first amplification module, a mode switching switch, a differential amplification module and a control unit. The input end of the first amplification module is connected with a sensor reading head. The mode switching switch is arranged at the output end of the first amplification module. The output end of the differential amplification module is connected with the input end of an analog-to-digital converter. The output end of the analog-to-digital converter is connected with the control unit. The control unit is further provided with an analog feedback signal output end which is connected with the first input end of the differential amplification module. The amplification gain of the first amplification module is smaller than that of the differential amplification module. When the mode switching switch is in a first conduction state, the output end of the first amplification module is connected with the input end of the analog-to-digital converter. When the mode switching switch is in a second conduction state, the output end of the first amplification module is connected with the second input end of the differential amplification module. Through the sensor signal sampling circuit, the measurement accuracy can be ensured while a large range measurement is met.

The invention relates to an audio amplification method and device. Signal processing is applied to a digital input audio signal. An analog audio output signal based on the digital input audio signal is provided by a switching converter circuit driven by the PWM signal. An analog audio output signal is detected to generate an analog feedback signal. Applying signal processing includes: generating a digital error signal indicative of a difference between a digital input audio signal and a digital word signal; applying a digital-to-analog conversion to the digital error signal to produce an analog copy of the digital error signal; generating an analog difference signal indicative of a difference between an analog copy of the digital error signal and the analog feedback signal; applying analog-to-digital conversion to the analog difference signal to produce a digital word signal; digital filtering is applied to the digital word signal to produce a filtered digital word signal that generates the PWM signal.

The invention relates to an impedance measurement system and an impedance measurement method. The system comprises an error current detection module, a digital vector negative feedback module and a feedback current output module. The error current detection module is used for detecting error current flowing into the input end of the error current detection module and converting the error current into a digital error signal; the digital vector negative feedback module is used for generating a digital feedback signal based on the received digital error signal and a preset orthogonal reference signal; and the feedback current output module is used for converting the received digital feedback signal into an analog feedback current until the error current value is 0. Through high-precision digital vector negative feedback, the error current corresponding to the measured device can be eliminated in a wide frequency range, the current measurement accuracy of the measured device is improved, and the impedance measurement accuracy of the measured device is further improved.

A bias circuit (100) of an avalanche photodiode, APD, comprising: a voltage conversion module (110) connected to the APD, wherein the voltage conversion module(110) is configured to convert an input supply voltage (Vin) to a bias voltage for the APD; an error amplifier (120) connected to the voltage conversion module (110) for implementing a feedback control; a voltage feedback loop (130) configured to provide the error amplifier (120) a first analog signal related to the bias voltage; and a current feedback loop (140) configured to provide the error amplifier (120) a second analog signal related to the APD current; wherein the error amplifier (120) is configured to control the voltage conversionmodule (110) based on the first and the second analog signals.

The invention discloses an ambient light elimination method, a light detection sensor and a system, and belongs to the technical field of proximity light sensors. In the calibration stage of the sensor, a current compensation module dynamically adjusts compensation current according to a compensation control signal output by an error amplification module, counteracts a current signal generated by ambient light and establishes a compensation state; in the detection stage, the current compensation module keeps the established compensation state, so that the compensation current continues to offset the ambient light current, and the integrator module only carries out integration on the current corresponding to the target light signal. According to the invention, a method for later compensation depending on digital signal processing and a digital-to-analog converter in a traditional scheme is abandoned, a front-end analog direct elimination mechanism is provided, ambient light current is directly offset through an analog feedback loop in an initial stage of a signal chain, namely before analog-to-digital conversion, and delay and precision limitation caused by digital processing are avoided.

This invention provides a control system and method for an underwater or sub-ice exploration robot applied to confined space exploration. One aspect of the control system includes a load-bearing umbilical cable. One end of the umbilical cable is connected to an ROV (Remotely Operated Vehicle), and the other end is wound around a winch drum. A magnetic ring is fixed to the end of the umbilical cable connected to the ROV, forming a linkage structure with the ROV to generate analog feedback to the control unit. A spring-loaded structure for resetting the magnetic ring is provided between the magnetic ring and the ROV. A tension sensor for monitoring the tension on the umbilical cable is fixed to one side of the winch, and the tension sensor is connected to the control unit. This invention can detect the umbilical cable status in real time and adaptively adjust the umbilical cable length, ensuring that the umbilical cable does not become taut due to contact with obstacles it avoids. This allows the ROV to autonomously return from complex terrain after completing observations in confined areas.