15 results about "Gain correction" patented technology

This invention provides an infrared thermal imaging method, relating to the field of infrared thermal imaging technology. The method utilizes a germanium infrared lens in an infrared thermal imaging system, whose surface is sequentially composed of subwavelength micro / nano structures and an anti-reflection film structure from the inside out. The infrared thermal imaging method includes: focusing target infrared radiation through the germanium infrared lens onto an infrared detection array; the infrared detection array converting the target infrared radiation into an electrical signal matrix; performing noise reduction and gain correction on the electrical signal matrix to obtain a preprocessed electrical signal matrix; performing temperature compensation on the preprocessed electrical signal matrix based on a temperature compensation formula and a transmittance temperature model to obtain a corrected signal matrix; and sequentially performing non-uniformity correction, image enhancement, and pseudo-color mapping on the corrected signal matrix before outputting and displaying the result. Using the method of this invention, higher transmittance, lower reflection loss, and more stable thermal imaging can be achieved.

The application discloses an exoskeleton robot control parameter determination method and system, and particularly relates to the technical field of robot control, which comprises the following steps: synchronously collecting rigid joint torque, flexible cable tension and inertia signals, generating a double-channel response spectrum through Fourier transform and obtaining a frequency ratio vector; calculating kinetic energy coupling indexes and viscous lag indexes, generating a bandwidth difference index through a collaborative phase model combined with an inertia-damping signature vector; adaptively obtaining a rigid gain matrix and a flexible gain matrix under energy consumption constraints by using sparse Bayesian optimization; constructing a weight function according to action prediction phase and energy consumption constraints, synthesizing a composite control instruction stream for the two gain matrices; monitoring expected and measured torque residual errors, and when the errors exceed a threshold, generating a gain increment according to gradient sensing and rewriting a coupling feature extraction unit to realize millisecond-level gain correction, thereby solving the problem that the prior art cannot accurately quantify energy mutual feedback and phase lag, leading to coupling oscillation caused by unified gain mismatch.

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 input conversion board, analog input board, and arithmetic processing board provided on the protective relay can be removed independently of each other. The analog input board (20) to be calibrated is mounted on the board mounting section (61) of the calibration system (60). The phase reference signal generation circuit (80) generates a phase reference signal (92) in response to the trigger signal (76). The calibration power supply (62) generates a sinusoidal calibration analog signal (64) based on the phase reference signal (92) and the amplitude setpoint (91). The control device (70), which outputs the trigger signal (76) and the amplitude setpoint (91), determines the gain correction value and phase correction value (94) of the analog input board (20) by comparing the amplitude and phase of the first digital conversion signal (93) generated by A / D conversion of the calibration analog signal (64) with the phase of the amplitude setpoint (91) and the phase reference signal (92).

The present invention provides a belt conveying device that controls the belt's position based on the belt's position detected by a sensor, thereby suppressing belt meandering caused by the temperature of the sensor. [Solution] The feedback gain of the control system for belt-side control is corrected by capturing the change in the output characteristics of the sensor unit 390 caused by temperature. Using the first voltage VPD1 and the second voltage VPD2 output from the sensor unit 390, which change depending on the end position of the fixing belt, the subtraction unit 33 calculates a differential value "VPD1-VPD2" indicating the end position of the fixing belt, and the addition unit 34 calculates a sum value "VPD1+VPD2" that reflects the change in the amount of light emitted by the light-emitting unit. Then, the "steering operation amount STEPn" calculated by the PID calculation unit 31 according to the differential value "VPD1-VPD2" is corrected by a gain correction coefficient determined by the gain determination unit 35 based on the sum value "VPD1+VPD2" to determine the tilt angle of the steering roller.

The application discloses a spacecraft attitude and orbit control energy storage integrated flywheel control method and system, belongs to the technical field of attitude and orbit control energy storage integrated flywheel, and the control method comprises the following steps: acquiring real-time state parameters of all flywheel units, inputting a feature tensor matrix into a Flywheel-Net model to obtain gain correction amounts of the flywheel units; for each flywheel unit, the gain correction amount is superimposed with preset basic PID parameters, updated PID parameters are obtained, the functions of the flywheel units are combined, an incremental PID algorithm is used to calculate control instruction increments of the flywheel units at the current time, and the control instructions of the flywheel units are updated; and the control instructions of the flywheel units are sent to motor drivers of the corresponding flywheel units to change the rotating speeds of the flywheel units. The application can solve the technical defects that a traditional linear PID is difficult to process high-speed rotating nonlinear disturbances, cope with parameter drift, and prolong the on-orbit life of a flywheel system.

This invention discloses a channel gain correction method and system for a multi-channel detector, relating to the field of nuclear radiation detection technology. The method includes: acquiring raw event data using a multi-channel detector; determining the energy of all channels triggered by the same event based on the action time; calculating the total energy value for each event using the energy of its respective channels, statistically analyzing all events to construct the total energy spectrum of the channel events, and setting an energy filtering window based on the position of the photoelectric peak in the total energy spectrum, retaining events within the energy filtering window as the valid event set; using an iterative algorithm to correct the channel gain coefficients, and monitoring the energy resolution in real time until convergence; applying the finally obtained gain coefficients to perform channel-level gain compensation on all raw event data, and outputting and displaying the corrected energy spectrum and gain distribution map. Gain correction can significantly improve the energy resolution and position resolution of the detector, enhancing the system's imaging quality and quantitative accuracy.

A receiver (20) includes an adaptive equalizer (24), a processor (36) and a decoder (32). The adaptive equalizer is configured to equalize a signal. The processor is configured to estimate a gain correction, which compensates for attenuation of the equalized signal by the equalizer due to noise present in the signal. The decoder is configured to decode the equalized signal. At least one of (i) equalization of the signal by the adaptive equalizer and (ii) decoding of the equalized signal by the decoder, is based on the gain correction.

A brake system is disclosed herein. The brake system includes a pressure plate, an end plate, a plurality of rotating discs, and stationary discs positioned between the pressure plate and the end plate, an electromechanical brake actuator controller, and an electromechanical brake actuator including a ball screw configured to extend to exert force on the pressure plate, the rotating discs, the stationary discs, and the end plate to generate a braking torque, the electromechanical brake actuator operatively coupled to the electromechanical brake actuator controller. Responsive to receiving a commanded level of braking force from the brake control unit, the electromechanical brake actuator controller is configured to command the electromechanical brake actuator to apply a correct level of braking force, the correct level of braking force being a measured level of braking force corrected by an auto gain correction factor.

Examples, aspects, and instances provide gain correction for a sub-sampling phase-locked loop (SSPLL) architecture. One example SSPLL architecture includes a reference phase-locked loop (RPLL) generator, a delay module, a phase detector, a phase frequency detection loop, and an electronic processor. The electronic processor is configured to operate the SSPLL architecture in a phase frequency detection operating mode to estimate an internal voltage-controlled oscillator (IVCO) gain based on a current flowing through the phase frequency detection loop, operate the SSPLL architecture in a gain estimation loop to estimate a sub-sampling phase detection (SSPD) gain value based the phase detector output, calculate a correction value based on the IVCO gain and the SSPD gain value, and operate the SSPLL architecture in an operating SSPLL loop to apply the correction value to the phase detector.

The application belongs to the technical field of non-electric variable regulation, and relates to a multi-robot cooperative path planning and dynamic obstacle avoidance decision-making method based on deep reinforcement learning, which comprises the following steps: acquiring a pose deviation vector, a relative obstacle distance and a transient acceleration vector of a controlled robot, and calculating an interactive conflict degree feature; using a deep reinforcement learning model to extract mapping correlation of the above parameters in a multi-machine coupling environment, and outputting a feedback gain correction coefficient; establishing a pose closed-loop regulation loop and mapping the feedback gain correction coefficient to the loop in real time; adjusting a differential item feedback gain to constrain a control signal output gradient, and inhibiting non-continuous steps of a controlled variable; and driving a motor adjustment unit to move the robot according to the corrected control signal, wherein the application constructs a regulation architecture based on a dynamic virtual damping, absorbs non-continuous energy jumps generated by path re-planning by using gain correction, eliminates regulation oscillation induced by instruction steps, keeps a pose evolution curve stable, and improves motion stability.

This invention belongs to the field of geophysical logging technology, specifically relating to a variable gain electromagnetic resistivity detection method and system for drilling. The method includes: acquiring an induced current signal; extracting the real and imaginary parts of the magnetic field strength vector; calculating the antenna pair phase difference and the received signal amplitude; evaluating a basic gain prediction value based on the time rate of change of the antenna pair phase difference and the received signal amplitude fluctuation; evaluating the equivalent formation impedance matching residual by combining the antenna pair phase difference and the received signal amplitude, and obtaining a gain correction coefficient; obtaining a variable gain control voltage based on the basic gain prediction value, the gain correction coefficient, and the cumulative term of the circuit environment temperature deviation, and adjusting the receiving gain of the receiving circuit accordingly. This invention solves the technical problem of traditional gain control easily saturating at formation abrupt transition interfaces, ensuring that the signal is always in the optimal linear operating range, and improving the accuracy and robustness of full-range resistivity measurement.

The present disclosure relates to a transconductance gain correction circuit. A transconductance gain correction circuit includes a constant voltage source, a first transconductance amplifier, a second transconductance amplifier, and a comparison module. The constant voltage source is configured to generate a reference voltage. The first transconductance amplifier is configured to generate a constant current in response to the reference voltage. The second transconductance amplifier is configured to generate a variable current in response to the reference voltage. The comparison module includes a first potentiometer, a reference resistor, and a comparison circuit. The first potentiometer is coupled to the first transconductance amplifier and has an adjusted resistance configured to generate a variable voltage based on the constant current and the adjusted resistance. The reference resistor is coupled to the second transconductance amplifier and has a designed resistance configured to generate a constant voltage based on the variable current and the designed resistance. The comparison circuit is configured to compare the variable voltage and the constant voltage to adjust the adjusted resistance.

This invention discloses a fast CT ring artifact correction method and system based on projected average images, belonging to the field of image processing technology. The key technical points are: First, the original projected images at different angles are superimposed and averaged to obtain a projected average image. Then, the projected average image is differentiated to obtain a differential image reflecting the gray-level abrupt changes in the projected average image. Next, the filter kernel window size at different pixel positions is calculated based on the differential image. Then, the projected average image is adaptively low-pass filtered based on the filter kernel window size to obtain a low-frequency image. Finally, the projected average image is divided by the low-frequency image to obtain a gain-corrected image. Finally, the pixel gain of the original projected images at different angles is corrected based on the gain-corrected image to obtain a projection sequence image with consistent gain. This invention extracts the gain inconsistency characteristics of all pixels from the projected average image, eliminating or mitigating ring artifacts without significantly reducing image quality.