79 results about "Impedance parameters" patented technology

A system for analyzing a battery module for possible reuse can include a stage, a measuring component, and a parameter analysis component. The stage can be configured to support the battery module that includes a plurality of batteries. The measuring component can be configured to measure, across a range of frequencies, an impedance across the battery module. The parameter analysis component can include a processor and a memory. The memory can store a reuse assessment module. The reuse assessment module can include instructions that cause the processor to: (1) determine a difference between values, at a first frequency and at a second frequency, of a first derivative, with respect to frequency, of a real part of the impedance and (2) determine, responsive to the difference being less than a threshold, that the battery module is suitable for reuse.

This disclosure proposes a multimodal motion switching control method and device for a mining intelligent assistive exoskeleton, relating to the field of mining safety equipment technology. The method includes: collecting multimodal sensing data from the wearer, extracting temporal features and inputting them into a lightweight classifier to identify motion patterns and output confidence scores; when the confidence score continuously exceeds a threshold, a mode switching intention is determined; the control subroutine corresponding to the current motion mode is invoked to obtain impedance parameters and the desired trajectory; based on the impedance parameters, the desired trajectory, and the current trajectory, interpolation fusion is performed using a hybrid transition strategy to generate smooth transition joint control commands to control the exoskeleton. This disclosure enables real-time and accurate identification of motion intentions in confined underground environments, smooth and compliant switching between multiple modes, effectively reducing switching impact, ensuring motion continuity and human-machine collaboration safety, and improving the adaptability and overall operational safety of the exoskeleton in confined environments.

This invention relates to the field of intelligent manufacturing and concrete product production equipment control technology, specifically an intelligent control system for the entire production process of concrete poles. The system includes: a reference parameter identification unit for performing a stepped acceleration test and calculating the empty mold impedance parameter characterizing the inherent mechanical resistance of the mold; a load torque observation unit for acquiring the electromagnetic drive torque in real time and extracting the net load torque acting only on the concrete material; a rheological and distribution state analysis unit for calculating the dimensionless eccentricity factor characterizing the uniformity of material distribution; and an adaptive closed-loop control unit for generating corresponding control commands: an emergency braking command is output when the eccentricity exceeds the safety limit, a constant-speed shearing command is output when the rheological state does not meet the standard, and an adaptive acceleration command is output when the rheological state meets the standard and the eccentricity is within the safe range. This invention solves the problem of the inability to directly observe the material state within a closed mold, achieving transparent monitoring of the physical properties of concrete.

This invention discloses a method and system for evaluating the heat dissipation performance of a motor based on temperature rise curve fitting, relating to the field of motor thermal health management technology. The method includes: monitoring the casing temperature and ambient temperature and calculating the temperature rise sequence; collecting current, speed, and cooling characteristic parameters to determine the evaluation period; generating a detection sequence within the evaluation period and injecting current under electromagnetic torque disturbance constraints to obtain a detection thermal input sequence; simultaneously demodulating the detection thermal input sequence and the temperature rise sequence to obtain thermal frequency response estimation and coherence, thereby selecting effective frequency bands and reconstructing a standardized temperature rise curve; fitting the standardized temperature rise curve to obtain thermal impedance parameters and calculating cooling sensitivity under two cooling levels, decomposing convection link parameters and heat conduction link parameters; calculating the heat dissipation deviation and making multi-level judgments, outputting a pre-diagnostic level. By using constrained injection, identifiable thermal excitation is achieved, improving the observability of the evaluation without significantly affecting the output.

The application belongs to the technical field of robot intelligent control, and provides a robot dual-source joint information impedance control method, system, medium and robot, which is oriented to the motion control of a 3R configuration robot, and comprises the following steps: performing signal filtering and differential processing on original motion state data of each joint of the robot to obtain joint motion information including filtered angle, filtered angular velocity and filtered angular acceleration; based on a kinematics model of the robot, mapping pose and / or velocity information of an end effector to a joint space to obtain mapping angle and mapping angular velocity; respectively fusing the angle and the angular velocity to obtain fused angle and fused angular velocity; and generating a control torque by combining the fused angle, the fused angular velocity and the filtered angular acceleration with preset target impedance parameters and an expected trajectory. According to the application, the angular velocity and the angular acceleration can be obtained without adding speed and acceleration sensors on the motor, so that the size, complexity and cost of the joint control motor are avoided.

The application discloses a kind of quadruped robot dog movement risk assessment method and system, it is related to machine movement assessment technical field.A kind of quadruped robot dog movement risk assessment system, including have: data acquisition module, topological network module, load coupling module, delay instability module, static instability module, risk guide module and comprehensive evaluation module.The application is by load coupling risk assessment result, the delay instability risk assessment result of external force interference and static instability risk assessment result are unified as the risk flow input of different types, risk flow coupling dynamics model is established in combination with risk transmission impedance parameter and capacity parameter, the coupling propagation relationship of different types risk flow in risk flow topological network and its superposition effect to overall movement risk are described, realize the system level description of the coupling mechanism of multiple-source risk under complex working condition.

The application discloses a lithium ion battery temperature estimation method and system based on electrochemical impedance spectroscopy. The method first performs electrochemical impedance spectroscopy testing on the same type of lithium ion battery under different states of charge, different charge and discharge cycle numbers, and different temperature conditions to obtain electrochemical impedance spectroscopy data of the battery. Based on electrochemical impedance spectroscopy analysis, a characteristic frequency with low coupling degree to the state of charge and the charge and discharge cycle number and sensitive to temperature is selected, and corresponding characteristic impedance parameters are extracted. Combined with correlation analysis, electrochemical impedance spectroscopy characteristic variables suitable for temperature estimation are determined. The global optimization of hyperparameters of the extreme gradient boosting algorithm is performed by using the Canthon optimization algorithm, and a Canthon optimization-extreme gradient boosting temperature estimation model is trained. The battery electrochemical impedance spectroscopy characteristics are input into the model, and the temperature estimation result of the lithium ion battery is output. The method is suitable for electric vehicles, energy storage systems, portable electronic devices, and the like.

This application relates to the field of digital twin technology, specifically to an adaptive testing method and system for urban monitoring components based on digital twins. The method includes: constructing a baseline matrix for the twin components; extracting signal quality parameters, response delay parameters, and drive loop impedance parameters of the physical components to form an initial healthy baseline vector and storing it in the baseline matrix; extracting endogenous degradation features via bypass to form a real-time degradation feature vector; identifying monitoring task modes to retrieve sensitivity vectors and binding them to form input samples; calculating a normalized deviation vector and weighting it with the sensitivity vector to obtain an effective degradation intensity vector; calculating a compensation vector and multiplying it with the original adjustment vector to generate a compensated command vector for execution; and collecting indicators and driving the self-evolution of the spectrum and the rolling calibration of the baseline matrix. This application effectively solves the problem of coexistence of dimensionality-selective overcompensation and undercompensation in scalar compensation coefficients due to the lack of awareness of task modes.

The application discloses a kind of rail transit along line vibration isolation barrier design optimization method, specifically related to rail transit vibration control technical field;Stratum impedance parameter set is constructed along line;On this basis, track-stratum coupling vibration propagation model is established, the vibration propagation process under the action of train excitation is simulated, and vibration energy distribution matrix is obtained;The vibration energy gradient change rate is calculated to construct the channel characteristic parameter set;According to the channel characteristic parameter, the vibration isolation barrier candidate structure set intersected with abnormal energy channel is generated, and the vibration attenuation efficiency of each candidate structure is calculated by vibration propagation simulation;Combined with vibration energy information entropy, a comprehensive evaluation index is constructed to determine the optimal vibration isolation barrier structure parameter combination;The application can accurately identify the vibration abnormal propagation path and realize the optimization design of vibration isolation barrier structure parameters, improve the isolation effect and engineering applicability.

This invention belongs to the field of circuit impedance measurement and discloses an online port impedance measurement method and system based on a dual-inductor probe configuration. The method includes: S1: calibrating a probe clamp on a fixture, measuring the two-port S-parameters using a VNA, then removing the probe; measuring the fixture reflection coefficient at the port connected to the VNA, and measuring the probe's unloaded reflection coefficient at the port connected to the probe. S k S2: Repeat the operation of S1 with another probe to measure its relevant S-parameters; S3: After calibration and measurement, based on the two-port S-parameters, fixture reflection coefficient, and unloaded reflection coefficient... S k S4: Calculate the characteristic parameters of each of the two probes; S5: Perform online port impedance measurement by clamping the dual inductor probes onto the wires of the two ports to be measured and measuring the S-parameters; S6: After the measurement is completed, combine the measured port S-parameters with the probe characteristic parameters and the no-load reflection coefficient to calculate the port impedance parameters.

A system for analyzing a battery module for potential reuse may include a platform, a measurement unit, and a parameter analysis unit. The platform may be configured to support a battery module comprising multiple batteries. The measurement unit may be configured to measure the impedance across the battery module within a frequency range. The parameter analysis unit may include a processor and a memory. The memory may store a reuse evaluation module. The reuse evaluation module may include instructions that cause the processor to: (1) determine the difference between the values ​​of the first derivative of the real part of the impedance with respect to frequency at a first frequency and at a second frequency, and (2) determine that the battery module is suitable for reuse in response to the difference being less than a threshold.

This invention relates to the field of power quality management technology and discloses a harmonic compensation method for a distributed active filter system. This method aims to solve the problems of low compensation efficiency, current interference, and resonance risk caused by the independent operation of each filter module in existing technologies. Its key feature is that each distributed active filter module exchanges harmonic state information through a lightweight communication link and constructs a state observer based on consensus theory to dynamically reconstruct the harmonic current distribution of the entire system. Based on this global state and combined with its own capacity and impedance parameters, each module collaboratively allocates the optimal compensation task, achieving decentralized and high-precision harmonic management. This method fundamentally overcomes the limitations of the traditional "local perception-independent decision-making" paradigm, effectively suppresses compensation interference between modules, improves the overall system's compensation efficiency and stability, while retaining the inherent flexibility, scalability, and fault tolerance of the distributed architecture.

This invention discloses a monitoring method for a fuel cell system, relating to the field of fuel cell technology. The method includes: simultaneously acquiring the current-voltage polarization curve and electrochemical impedance spectroscopy (EIS) of the fuel cell system at a preset current point; obtaining real-time impedance parameters based on the EIS, and obtaining real-time polarization slope parameters, real-time average single-cell voltage, and real-time minimum single-cell voltage based on the current-voltage polarization curve; determining calibration test parameters based on the EIS, preset EIS, real-time impedance parameters, preset impedance parameters, real-time average single-cell voltage, real-time minimum single-cell voltage, preset average single-cell voltage, and preset minimum single-cell voltage; determining the real-time fuel cell stack lifetime based on the calibration test parameters, the current-voltage polarization curve, and the preset current-voltage polarization curve; and determining fault location information and early warning information based on the real-time fuel cell stack lifetime. This effectively improves the accuracy of fault diagnosis.

The purpose of this invention is to address the problems of poor adaptability of traditional fixed impedance control to unknown and dynamically changing environments, low contact force control accuracy, severe overshoot, insufficient compliance, high computational complexity, poor real-time performance, and difficulty in engineering implementation of existing impedance control methods. This invention provides an adaptive fuzzy impedance control method for robotic arms, constructing a fully closed-loop control architecture. Using force deviation and its rate of change as core inputs, a fuzzy controller is used to solve for the real-time compensation of three types of impedance parameters online, achieving adaptive dynamic adjustment of impedance parameters as the environment changes. Simultaneously, optimization techniques such as environmental parameter identification, fixed-time interference observation, anti-saturation compensation, and command filtering are integrated to comprehensively improve the system's control performance and engineering practicality.

This invention relates to the field of water quality monitoring and control technology, and discloses a method, system, and storage medium for intelligent water quality monitoring and distributed control. The method collects water quality parameters through an integrated control unit. During system initialization, multi-band calibration signals are applied to establish a frequency-impedance mapping table. During operation, equivalent impedance parameters are calculated from the mapping table based on the inverter's target frequency, and impedance compensation correction is performed on the current sample values. Dynamic feature template parameters are then obtained from the frequency-current feature mapping table for matching calculations. The actuator status is determined based on the matching degree, and control commands are output. This invention solves the problem of insufficient accuracy in determining the actuator status under combined operating conditions of long-distance cables and frequency converter drives.

A time-domain inter-turn protection method and system for reactors based on resistance and inductance parameter identification is proposed. This method obtains the instantaneous values ​​of the three-phase currents at the beginning and end of the reactor within a sliding window. A current matrix is ​​constructed using the instantaneous values ​​of the three-phase currents at the beginning and their rate of change. The instantaneous voltage across the neutral point reactor is calculated based on the inductance value of the small reactor at the neutral point and the rate of change of the instantaneous value of the self-generated zero-sequence current at the end of the reactor within the sliding window. A voltage vector is constructed using the voltage difference between the instantaneous voltage across the reactor within the sliding window and the instantaneous voltage across the small reactor at the neutral point. The equivalent resistance and equivalent inductance of the reactor are calculated using the current matrix and voltage vector. When the equivalent resistance is greater than a resistance threshold and the equivalent inductance is less than an inductance threshold, and this condition persists for a set duration, an inter-turn fault triggers the protection action. The protection method exhibits high sensitivity and is reliable even when the reactor core is saturated, the line distributed capacitance is high, or the reactor oscillates, without malfunctioning. It is also unaffected by new power systems.

The application discloses a SWISS rectifier IVS circuit commutation control method, device, equipment and medium. The method comprises the following steps: determining the duty cycle information of a step-down circuit according to a target output direct current, a target output reference voltage, a target output reference reactive power, grid source side voltage information and filter capacitor impedance parameters; determining the control conductance parameters of the step-down circuit according to the duty cycle information of the step-down circuit, the target output direct current and the grid source side voltage information; determining the relationship among the grid source side voltage information, the terminal voltage information and the filter inductor voltage information based on the filter inductor impedance parameters and the control conductance parameters of the step-down circuit to determine the conversion factor according to the filter inductor impedance parameters and the control conductance parameters of the step-down circuit; and determining the compensation commutation factor according to the conversion factor to compensate the initial commutation angle according to the compensation commutation factor. The scheme can accurately lock the commutation point of the SWISS rectifier IVS circuit.

The application discloses a pantograph-catenary arc electrical characteristic and transient overvoltage analysis method considering the influence of time-varying parameters, in which, in the transient analysis of pantograph-catenary off-line arc, time-varying impedance and capacitive impedance parameters of a traction network are introduced into the pantograph-catenary arc electrical characteristic formation process for the first time, and an improved arc model considering the influence of train speed and a fine train-track grounding system model are combined to realize the unified analysis of the overvoltage of a train roof and a train body, avoid the overvoltage evaluation deviation caused by the static traction network parameters and the simplified grounding model, and improve the accuracy and engineering applicability of the pantograph-catenary off-line arc transient overvoltage analysis.

The present application relates to a kind of flexible assembly-oriented multi-arm vision-haptics fusion control and fault-tolerant system and method, it is related to manipulator control technical field, system includes: data construction module, for constructing heterogeneous scene graph model;Task allocation module, for generating collaborative representation vector, and based on collaborative representation vector output task priority ranking result and initial candidate task allocation set;Trajectory generation module, for generating multi-arm collaborative schedule and corresponding time parameterized motion trajectory;Instruction generation module, for generating used to drive each manipulator actuator compliant assembly control instruction;Signal output module, for making digital twin simulation module output corrected impedance parameter set and for triggering trajectory re-planning re-planning trigger signal;Fault-tolerant control module, for starting fault-tolerant switching mechanism based on reinforcement learning strategy, the dynamic redistribution of multi-arm task or anti-interference control is executed.The control precision of system can improve manipulator.

This invention discloses a method and related apparatus for power grid reliability assessment using decoupled iterative calculations across all voltage levels in the main and distribution networks. It relates to the field of power grid assessment technology and includes: collecting power grid operation data at each voltage level; performing time alignment and outlier cleaning on multi-source data; classifying the voltage levels as high-voltage, medium-voltage, and low-voltage layers; identifying typical scenarios based on power grid operation data and calculating weights to generate a reference impedance matrix; dynamically calculating adjustment coefficients based on real-time monitoring data to correct impedance parameters; and constructing a coupling factor matrix using historical data to record the impact of faults. The method of this invention achieves dynamic impedance matching across all voltage levels through layered parallel calculations at the high-voltage, medium-voltage, and low-voltage levels, improving computational efficiency while reducing errors in cross-level voltage interaction analysis.

The embodiment of the application relates to the field of new energy power generation control of a power system, in particular to a photovoltaic array ground fault rapid detection and positioning device, which comprises a fault signal acquisition unit, a fault feature extraction unit, a distributed positioning unit and a main control unit; wherein the fault signal acquisition unit covers different areas of a direct current bus and a grounding net through double-interface synchronization, ensures the comprehensiveness of fault feature information acquisition, the fault feature extraction unit generates standardized characteristic values based on multidimensional global parameters, avoids the limitation of single impedance parameter analysis, and the distributed positioning unit realizes full-link coverage of head and tail ends and intermediate nodes through a component string multi-node interface, can accurately lock the specific component string and node position where the fault is located after receiving a positioning instruction, and solves the pain point that the prior art can only preliminarily identify a fault area and cannot meet precise operation and maintenance disposal.

This invention relates to the field of seismic data interpretation technology, and particularly to an inversion method, apparatus, equipment, medium, and product for fractured-vuggy reservoirs. The method includes: constructing an active profile model framework for fractured-vuggy reservoirs; constructing a wave impedance inversion objective function based on the active profile model framework; solving the wave impedance inversion objective function to obtain the impedance parameters and boundary set of the fractured-vuggy reservoirs; which can improve the accuracy of the inversion results for fractured-vuggy reservoirs.

This invention belongs to the field of electronic information technology and discloses a method and related device for online monitoring of current transformer errors considering load effects. The method includes: acquiring the phasor values ​​of the second-order fundamental current of the current transformers in each branch line of the target busbar; constructing an overdetermined regression equation set; introducing an elastic network regression problem to construct a hybrid regularized loss function; solving the elastic network regression problem to minimize the hybrid regularized loss function; obtaining the current transformer impedance parameter matrix of the overdetermined regression equation set; obtaining the impedance parameter increments of other current transformers compared to the reference current transformer based on the current transformer impedance parameter matrix; and obtaining the online monitoring result of the current transformer error based on the comparison between the impedance parameter increments of each current transformer and a preset increment threshold. This invention can adapt to the online monitoring requirements of current transformer errors under complex operating conditions.

This invention discloses a battery stack with intelligent temperature control, belonging to the field of battery stack technology. It includes: a battery module; a multimodal passive wireless sensor network embedded within the battery module, employing a SAW resonator to monitor temperature, gas concentration, and impedance parameters; an edge computing-driven LSTM-PID co-controller that predicts the probability of thermal runaway and dynamically adjusts PID parameters based on the temperature change rate, gas concentration abrupt change, and impedance fluctuation values ​​collected by the multimodal sensor network; a dynamic hybrid air-cooled / liquid-cooled temperature control device that controls the coordinated operation of an adjustable-speed fan and a coolant pump based on the thermal runaway probability value; and a TSN blockchain communication module that transmits control commands via IEEE 802.1Qbv time slot scheduling and verifies the legality of the commands through a blockchain smart contract. This invention solves the problems of complex wiring and difficult maintenance associated with traditional sensors, while simultaneously achieving multi-parameter fusion monitoring and improving the early warning capability of the temperature control system.

The application discloses a micro-grid topology reconfiguration method based on a graph neural network, and relates to the technical field of micro-grids, solves the problem that the modeling process of a traditional topology reconfiguration method often ignores the difference between the connection modes of nodes, and further affects the accuracy of impedance parameter checking and optimization, the application extracts historical interaction data of adjacent power nodes, adopts an equilateral polygon and a measurement connecting line to construct an exclusive checking chart, binds different data types and the measurement connecting line and gives corresponding measurement standards, combines parameter change proportion and data chart area proportion to calculate proportional characteristics, and forms a standardized checking reference; the checking system can convert abstract operation parameter changes into quantifiable area proportion and proportional characteristics, avoids the disadvantages of traditional checking, such as relying on experience judgment and lacking unified standards, and realizes accurate depiction of operation parameter change characteristics of adjacent power nodes.

This application relates to the field of lithium battery technology, specifically disclosing a charging parameter adjustment method, computer equipment, and storage medium. The method includes: performing rapid charge-discharge cycles on the battery according to a charging parameter mapping table; performing self-checks on the battery at different times; executing a charging-pause-resting charging cycle; acquiring the first and second voltages and charging currents corresponding to each cell in the battery, where the first voltage is the instantaneous voltage of each cell before the start of the charging cycle, and the second voltage is the voltage of each cell when charging for a preset duration during the charging cycle; acquiring the characteristic impedance parameters of each cell in different charging cycles based on the first and second voltages and the charging current; determining lithium plating risk points based on the characteristic impedance parameters; correcting the charging parameters in the charging parameter mapping table based on the lithium plating risk points, and continuing to execute subsequent rapid charge-discharge cycle steps according to the corrected charging parameter mapping table. This achieves a balance between high charging speed and battery safety and lifespan.