53results about How to "Improve dynamic characteristics" patented technology

The invention discloses an active damping control system for improving the output impedance of a current source type inverter, which comprises a current loop control loop, an active damping branch and an improved phase-locked loop, and is characterized in that the difference value of reference current and feedback network access current passes through a current controller to form the current loop control loop; the voltage of the grid-side inductor is fed back to the output of the current loop through the virtual resistor link to form a damping branch, and the voltage of the common coupling point enters the traditional phase-locked loop link through the low-pass filter and forms an improved phase-locked loop through phase compensation. The optimal feedback coefficient of the damping branch is designed according to the optimal damping ratio, the low-pass filter parameters are designed according to the phase at the maximum resonant frequency, the reasonable proportional gain link is designed according to the improvement of the output impedance amplitude, the resonance of the current source type inverter can be effectively inhibited, the output impedance of the inverter is increased, and the output impedance of the inverter is improved. And the quality of the network access current of the current source type inverter and the stability margin of the current source type inverter in a weak power grid are improved, and the stability of the system is improved.

The invention discloses a control system for a phase-locked loop-free synchronous tracking mode of a hybrid network following-construction system, and belongs to the technical field of virtual synchronous generator control, phase angle information generated by network construction type control is used for synchronization of a network following type inverter, and synchronization of the network following type inverter is realized without a phase-locked loop. According to the control technology, potential unstable factors caused by the dynamic state of the phase-locked loop can be avoided, and meanwhile, the two inverters of the following network and the constructing network have better transient performance. According to the improved scheme, an ideal voltage source on the direct current side of the inverter is replaced by a boost circuit controlled by a single current loop, and a direct current voltage loop is added to an active loop controlled by a network constructed on the alternating current side. Compared with the control technology provided by the invention, the improvement enables the control technology to have no frequency steady-state deviation and have better transient and steady-state performance.

The invention provides a dynamic double-closed-loop control method for a magnetic suspension energy storage flywheel rotor based on LADRC. The dynamic double-closed-loop control method is used for realizing stable suspension and dynamic control of the magnetic suspension energy storage flywheel rotor. Firstly, a mathematical model of each degree of freedom of a flywheel rotor and a linearization model of a power amplifier-electromagnet coil under a magnetic bearing coordinate system are established; then, defining an electromagnetic coupling term, a gyroscope coupling term and an unbalance term in the flywheel rotor mathematical model as external disturbance, deducing a flywheel rotor and power amplifier-electromagnet coil mathematical model for controller design, and designing a position loop second-order LADRC controller and a current loop first-order LADRC controller; and finally, setting controller parameters of a position loop and a current loop by adopting a pole assignment method. Simulation results show that the double-closed-loop control strategy can realize effective decoupling among degrees of freedom under static and high-speed suspension working conditions of the flywheel rotor, and compared with PID control, the double-closed-loop control strategy is good in dynamic characteristic and strong in anti-interference capability. The method is of great significance in guaranteeing stable and reliable operation of the magnetic suspension energy storage flywheel rotor.

The invention discloses a virtual synchronous machine active low-frequency oscillation suppression method based on power feedback compensation, and belongs to the field of new energy grid-connected converter control under large-scale new energy access. According to the method, the output voltage and current of the new energy converter are sampled, the instantaneous output active power and reactive power are calculated, and the average output active power and reactive power are obtained through a first-order low-pass filter; and then virtual synchronous machine active outer loop control based on output power feedback compensation and reactive outer loop control based on reactive-voltage droop are adopted to obtain reference values of a d-axis voltage amplitude and a voltage phase angle of new energy converter voltage inner loop control, and output voltage closed loop control is carried out. Under the condition that the output active control order and the steady-state characteristic are not increased, the output active dynamic overshoot and low-frequency oscillation suppression of the new energy converter based on the network construction control type virtual synchronous machine are effectively realized, the parameter value range is slightly constrained by the system stability, and the engineering application is simple.

The invention discloses a data-driven calculation method, device and equipment for hydrogen storage capacity of a solid-state hydrogen storage device, and belongs to the technical field of solid-state hydrogen storage. The method comprises the steps that distributed parameters of the solid-state hydrogen storage device are obtained through a multi-physical-field full-coupling model of the solid-state hydrogen storage device, and the multi-physical-field full-coupling model is constructed based on structural characteristics of the solid-state hydrogen storage device; obtaining a dynamic response database of the multi-physics field full-coupling model, wherein the dynamic response database is used for representing a corresponding relation between distributed parameters of the multi-physics field full-coupling model and the hydrogen storage capacity of the solid hydrogen storage device; performing dynamic identification on the multi-physical field full-coupling model through a dynamic response database to obtain an identification model of the solid hydrogen storage device; and inputting the target distributed parameters of the solid-state hydrogen storage device into the identification model, and performing data driving calculation on the target distributed parameters through the identification model so as to output the predicted hydrogen storage amount of the solid-state hydrogen storage device. According to the method, the calculation cost and the solving time can be reduced.

The invention discloses a barium titanate-based leadless piezoelectric ceramic material and a preparation method and application thereof, and relates to the technical field of functional materials, the chemical formula of the barium titanate-based leadless piezoelectric ceramic material is Ba0. 9Sr0. 1Ti1-xSnxO3, x = 0-0.10, and x represents a mole fraction. By regulating and controlling the concentration of Sn ions in the BT-based lead-free piezoelectric ceramic, a multiphase structure with flat free energy is formed near the room temperature, meanwhile, an unconventional short-range disorderly-arranged polar snow-mud-state domain structure is induced, an extremely good domain change dynamic behavior is shown under the action of an external field, and the piezoelectric ceramic is prepared. Meanwhile, excellent piezoelectric property, electrostrictive property, electrocaloric property and mechanical property are obtained, and a candidate material is provided for a new generation of multifunctional high-precision electronic information devices.

The invention discloses a joint quantification method and system for flexibility of an adjustable energy system in a building. The method comprises the following steps: establishing an adjustable energy system simulation platform; flexible response parameters are input into the simulation platform, parallel simulation is carried out on the baseline working condition, the independent response working condition and the combined response working condition, and simulation data corresponding to each working condition are obtained; comparing energy consumption parameters in the simulation data under other response working conditions by taking the simulation data of the baseline working condition as a reference, and segmenting time periods; respectively calculating flexibility parameters of each system under each response working condition according to the segmented time periods; and the gain rates of the flexibility parameters of the air conditioning system under the two response working conditions serve as joint effect indexes. According to the method, a set of building energy flexibility quantification framework for two systems is adopted, and multi-dimensional quantitative characterization is carried out on the joint effect. And the dynamic power change of the air conditioning system under the internal disturbance flexible action can be reflected.

This invention belongs to the field of robot joint technology, specifically relating to a rope-driven, decoupled, dual-parallel five-DOF bionic shoulder joint, including a scapulothoracic joint mechanism, a glenohumeral joint mechanism, a drive base device, and drive ropes. The scapulothoracic joint mechanism and the glenohumeral joint mechanism are internally rotatably connected. The drive base device is used to fix the scapulothoracic joint mechanism and to provide drive ropes for both mechanisms. The scapulothoracic joint mechanism is constrained by a first constraint branch, a second constraint branch, and a decoupling through-line branch, satisfying the pure rolling two-DOF rotation requirement, driven by two sets of antagonistic drive ropes. The glenohumeral joint mechanism is driven by four independent drive ropes to achieve three-DOF rotational motion. The decoupling through-line branches distribute the drive ropes of the glenohumeral joint mechanism, achieving physical decoupling and ensuring that the drives of the two mechanisms do not interfere with each other. Through rope-driven and dual-parallel passive mechanisms, a larger range of motion can be achieved, improving the stiffness and load-bearing capacity of the mechanism.

The application provides a high-dynamic force measuring device and method for a gas actuator, and relates to the technical field of force measurement of the gas actuator. The application discloses a high-dynamic force measuring device and method for a gas actuator, and relates to the technical field of force measurement of the gas actuator. The application discloses a high-dynamic force measuring device and method for a gas actuator, and relates to the technical field of force measurement of the gas actuator. The application discloses a high-dynamic force measuring device and method for a gas actuator, and relates to the technical field of force measurement of the gas actuator. The application discloses a high-dynamic force measuring device and method for a gas actuator, and relates to the technical field of force measurement of the gas actuator. The application discloses a high-dynamic force measuring device and method for a gas actuator, and relates to the technical field of force measurement of the gas actuator. The application discloses a high-dynamic force measuring device and method for a gas actuator, and relates to the technical field of force measurement of the gas actuator. The application discloses a high-dynamic force measuring device and method for a gas actuator, and relates to the technical field of force measurement of the gas actuator. The application discloses a high-dynamic force measuring device and method for a gas actuator, and relates to the technical field of force measurement of the gas actuator. The application discloses a high-dynamic force measuring device and method for a gas actuator, and relates to the technical field of force measurement of the gas actuator. The application discloses a high-dynamic force measuring device and method for a gas actuator, and relates to the technical field of force measurement of the gas actuator. The application discloses a high-dynamic force measuring device and method for a gas actuator, and relates to the technical field of force measurement of the gas actuator. The application discloses a high-dynamic force measuring device and method for a gas actuator, and relates to the technical field of force measurement of the gas actuator. The application discloses a high-dynamic force measuring device and method for a gas actuator, and relates to the technical field of force measurement of the gas actuator. The application discloses a high-dynamic force measuring device and method for a gas actuator, and relates to the technical field of force measurement of the gas actuator. The application discloses a

This invention discloses a variable-wave arc welding power supply control method, arc welding equipment, control device, and storage medium. Applied to an arc welding equipment, the equipment includes a coordination control module and at least two power conversion modules. The coordination control module is connected to the controlled terminals of each power conversion module to control the switching of the power conversion modules to form and output pulse power. The output terminals of each power conversion module are connected in parallel to superimpose the electrical energy of the arc welding power supply. The variable-wave arc welding power supply control method includes: the coordination control module outputting its corresponding control commands to each power conversion module; and each power conversion module adjusting the pulse width and on / off timing of the pulse power according to the control commands to increase the power or voltage amplitude of the arc welding power supply. This design optimizes the output waveform of the welding power supply, enabling it to provide excellent dynamic characteristics and improve welding performance.

The invention provides a control method and device for a network-forming type grid-connected converter. According to the output voltage stable value of the grid-connected converter under the two-phase rotating coordinate system and the current reference value of the filter inductor under the two-phase static coordinate system, the voltage and current inner loop control of the grid-connected converter is realized, the control performance of the grid-connected converter can be improved, and the stable operation of the grid-connected converter is ensured. According to the invention, the actual value of the output voltage of the grid-connected converter under the two-phase static coordinate system is calculated according to the actual value of the current of the filter inductor and the actual value of the voltage of the primary winding, so that the state feedback control of the grid-connected converter is realized, and the dynamic characteristics of the grid-connected converter can be improved. And the control dimension of the network construction type grid-connected converter can be effectively increased.

The utility model discloses a semiconductor device. The semiconductor device includes: a substrate; the buffer layer is positioned on one side of the substrate; the channel layer is located on the side, away from the substrate, of the buffer layer; the composite barrier layer comprises a first barrier layer and a second barrier layer, the first barrier layer is located on the side, away from the buffer layer, of the channel layer, and the second barrier layer is located on the side, away from the channel layer, of the first barrier layer; the band gap of the second barrier layer is larger than that of the first barrier layer; the dielectric layer is located on the side, away from the channel layer, of the composite barrier layer; the grid is located on one side, away from the composite barrier layer, of the dielectric layer; the source electrode is located on the side, away from the channel layer, of the composite barrier layer; and the drain electrode is positioned on one side, far away from the channel layer, of the composite barrier layer. According to the technical scheme, the dynamic characteristics of the depletion type gallium nitride semiconductor device are improved.

The invention relates to a super-junction vertical double-diffused metal oxide semiconductor device and a preparation method thereof. The super-junction vertical double-diffused metal oxide semiconductor device comprises a substrate structure; the super junction structure is arranged in the substrate structure; the super junction structure comprises first doped regions and second doped regions which are sequentially and alternately arranged along a first direction; the first direction is perpendicular to the thickness direction of the substrate structure; the body region is arranged in the substrate structure and located on the side, close to the front face of the substrate structure, of the first doping region; the source region is arranged in the body region; the grid electrode is arranged on the substrate structure; wherein the first doped region comprises a first sub-doped region connected with the body region, and the doping concentration of at least part of the first sub-doped region is gradually increased from the edges of the two sides of the first sub-doped region in the first direction to the center of the first sub-doped region; the substrate structure, the second doped region and the source region are of a first conductive type, and the first doped region and the body region are of a second conductive type. The dynamic characteristics of the device can be improved.

The invention provides a wafer claw using a flexible hinge, and relates to the technical field of silicon wafer conveying devices. The sheet claw comprises a driving assembly and an adsorption assembly, the driving assembly comprises a base and a driving piece, the driving piece is used for driving the adsorption assembly to ascend and descend, the driving piece comprises a fixed part and a movable part, the fixed part is fixedly connected with the base, and the movable part is fixedly connected with the adsorption assembly; the sheet claw further comprises a plurality of fixing bases which are evenly arranged around the axis of the movable part, and a flexible hinge is connected between each fixing base and the movable part. The flexible hinge comprises at least one branch chain, each branch chain comprises at least one flexible piece, and the flexible pieces extend in the direction perpendicular to the lifting direction of the adsorption assembly. The wafer claw can achieve the guiding effect of a linear bearing, does not use a lubricant, can avoid the situation that grease volatilizes in high-vacuum and ultrahigh-vacuum environments to generate particles to pollute the environment and silicon wafers, and does not have the problem of gas leakage.

The invention discloses a virtual synchronous machine active power control method based on angular frequency error proportional feedforward, which is characterized in that an angular frequency error output by a virtual synchronous machine is used for correcting an angle output by the virtual synchronous machine after being subjected to a proportional link, so that transient damping of a system is improved, and the stability of the system is improved. And therefore, active power dynamic oscillation suppression can be realized on the premise that the virtual damping is zero. Due to the fact that the virtual damping can be zero, the active power deviation generated when the power grid frequency deviates can be eliminated, and the active power control precision is improved. Therefore, the method can be applied to the field of virtual synchronous machine control so as to solve the contradiction problem between dynamic oscillation and steady-state deviation existing in conventional virtual synchronous machine active power control, and the active power control precision is improved.

The invention discloses a super-junction MOSFET (Metal-Oxide-Semiconductor Field Effect Transistor) device, relates to the technical field of semiconductor power devices, and can improve the anti-interference capability and dynamic characteristics of the super-junction MOSFET device. The super-junction MOSFET device comprises a wafer substrate, a column structure located on the wafer substrate, a polycrystalline silicon gate layer located on the column structure and a source electrode region formed in the column structure, wherein the width of the polycrystalline silicon gate layer is 1. The column structure comprises first columns of a first conductive type and second columns of a second conductive type, and the first columns and the second columns are alternately arranged; a first injection region on the inner ring and a second injection region on the outer ring are arranged below the polycrystalline silicon gate layer, and the first injection region is a first conductive type body region; the second injection region has the first conductive type, is located in the column structure, and is connected with the first column.

The present invention discloses a feed-back type suspension control system based on a PI feed-forward model predictive control algorithm, which belongs to the field of vehicle control and includes the following steps: S1, establishing a dynamic model of a feed-back suspension system; S2, establishing a simulation model of an energy feedback control system; S3, designing a voltage outer loop controller, calculating a reference current through a PI controller and a model-based feed-forward compensator; and designing a load disturbance observer to observe changes in the load; S4, designing a current inner loop controller, calculating an optimal duty cycle through a model predictive control algorithm; and designing an inductor current observer to perform an equivalent estimation of the inductor current to avoid the influence of changes in input voltage and inductor resistance on the quality of the feedback power. The present invention can effectively improve the quality of the feedback power, and at the same time, can still maintain a good control effect when external disturbances occur. In addition, the present invention can also effectively improve the ride comfort and handling stability of the vehicle.

The present invention discloses a unit control system and method based on real-time online analysis of coal quality, the system includes a raw coal hopper, a raw coal hopper outlet pipeline, a coal feeder belt, a weighing instrument, a coal feeder variable speed motor, a coal feeder outlet pipeline, a coal mill, a coal mill inlet primary air pipeline, a primary air volume measuring element, a boiler furnace, a coal quality online monitoring module, a coal feeder controller, a blower, a blower variable output element, an air supply pipeline, a secondary air volume measuring element and a secondary air controller. The method uses the available online data of incoming coal that meets the needs of real-time operation control to achieve accurate fuel and air distribution of thermal power units, and has significant practical value.

The invention discloses an OWL-S-based Web service comprehensive score calculation method. The method comprises the following steps: using OWL-S semantics to describe Web services; selecting a multi-dimensional evaluation index; an evaluation model based on OWL-S is established; calculating a comprehensive score; optimizing the evaluation model by using machine learning; constructing a dynamic evaluation model; fusing domain knowledge; and a privacy protection mechanism is adopted. By combining the OWL-S semantic description language, multiple evaluation indexes, a machine learning algorithm, a dynamic evaluation mechanism and personalized recommendation, comprehensive evaluation and ranking of Web services are realized, the intelligent level of Web service evaluation is further improved, the evaluation accuracy, efficiency and user experience can be effectively improved, and the user experience is improved. And the requirements of Web service providers, users and platforms are met.

The invention discloses a power generation steam turbine nonlinear active disturbance rejection control method and related equipment, and the method comprises the steps: obtaining a mathematical model of a steam turbine electro-hydraulic control system, and determining a transfer function; constructing a control equation of a feedback structure based on the transfer function; constructing a target expansion state function of the nonlinear expansion observer by using a logarithmic function and a hyperbolic tangent function; and the control equation and the target expansion state function are applied to the marine power generation steam turbine, so that nonlinear active-disturbance-rejection control of the marine power generation steam turbine is achieved. Through the logarithmic function and the hyperbolic tangent function, the novel nonlinear extended state observer is constructed, nonlinear factors are introduced, the dynamic characteristics of the nonlinear active-disturbance-rejection controller are better improved, the robust performance and control quality of the power generation steam turbine under the fault working conditions of large load step change, oil pressure abnormity and the like are improved, and the power generation efficiency of the power generation steam turbine is improved. And the method is of great significance in improving the safety and stability of unit operation.

The invention provides a coupled cavity semiconductor laser, and relates to the technical field of optical fiber communication and semiconductor lasers. The coupled cavity semiconductor laser comprises an echo wall microcavity used for outputting an echo wall fundamental mode; the first end of the Fabry-Perot cavity is connected with the echo wall microcavity. The second end of the Fabry-Perot cavity is connected with the echo wall microcavity. Wherein the resonant mode of the Fabry-Perot cavity is coupled with the fundamental mode of the echo wall, and a light beam of the coupled mode is output from the second end of the Fabry-Perot cavity.

The invention relates to the technical field of numerical control machine tools, in particular to a swing head capable of achieving continuous indexing, locking and positioning and a machine tool with the swing head. The swing head comprises a rotating shaft unit driven by a torque motor unit in a box shell unit, and the rotating shaft unit is provided with an outer friction plate rotating along with the rotating shaft unit through a first limiting disc; the box body shell unit is provided with inner friction plates arranged alternately with the outer friction plates, the box body shell unit is further provided with a piston matched with the inner friction plates through an oil cylinder groove, and a disc spring is arranged between the piston and the side wall, away from the first limiting disc, of the oil cylinder groove. The invention further discloses a machine tool with the swing head. The positioning device is compact in structure, high in positioning precision and capable of locking and positioning at any angle.

This invention provides a wind-powered propulsion device. One technical solution of this invention provides a wind-powered propulsion device disposed on a moving body, receiving wind to generate propulsion force. The wind-powered propulsion device comprises: a rotating body having a frame portion formed in an annular shape around a rotation axis, and capable of rotating around the rotation axis; and a plurality of blades, each fixed to the frame portion, and configured such that an imaginary straight line connecting the two ends of each blade in a direction orthogonal to the rotation axis is parallel to the frame portion. The plurality of blades includes a central blade whose imaginary straight line connecting the two ends of each blade passes through the center of the frame portion.

The application relates to the technical field of current measurement, in particular to a handheld optical fiber current measuring instrument which comprises a handheld shell, a protective optical cable and a collecting unit; the protective optical cable comprises a protective structure, a reflecting mirror, a sensing optical fiber, an optical fiber wave piece and a transmission optical fiber; the protective structure is coated on the reflecting mirror, the sensing optical fiber and the optical fiber wave piece; a reflecting mirror end closing structure is arranged at the position of the reflecting mirror; the two ends of the sensing optical fiber are connected with the optical fiber wave piece and the reflecting mirror respectively, and the optical fiber wave piece and the reflecting mirror are arranged close to each other; the other end of the optical fiber wave piece is connected with the transmission optical fiber, and the transmission optical fiber is connected with the collecting unit; the optical fiber wave piece, the transmission optical fiber and the collecting unit are all located in the handheld shell; the sensing optical fiber extends to the outside of the handheld shell to be sleeved at the preset position of a component to be measured. The handheld optical fiber current measuring instrument has a series of advantages such as good insulation performance, small volume, light weight, large measurement range, good dynamic characteristics, full digitization, simultaneous measurement of AC and DC signals and good portability.

The invention discloses an asymmetric fault cooperative ride-through control method for an offshore wind power flexible direct current system, the system comprises an offshore wind power plant, an alternating current collection system, an offshore MMC converter station and a direct current transmission submarine cable, the offshore wind power plant is composed of at least one wind turbine generator, and the wind turbine generator is connected with a grid through a generator side converter and a grid side converter. The method comprises the four steps of fault detection and sequence component extraction, determination of a total negative sequence current instruction of a system, control of a grid-side converter of a wind turbine generator set to inject limited negative sequence current, and control of a flexible DC converter station to compensate negative sequence current difference. The method has the technical advantages of giving consideration to overvoltage suppression and active power transmission, guaranteeing equipment safety, improving relay protection reliability, optimizing system dynamic characteristics and the like.

The invention provides an inverter VSG control strategy introducing a negative droop link and a parameter design method thereof, and belongs to the field of inverter control, and the method comprises the following steps: 1, constructing a VSG active control ring, introducing the negative droop link in the VSG active control ring, and changing a VSG active power reference value; 2, determining an inertia coefficient in a VSG active control ring according to the inertia supporting capability requirement; step 3, determining a damping coefficient in the VSG active control loop under the inertia coefficient in the step 2 according to the stable operation requirement of the inverter; step 4, determining an equivalent droop coefficient to be embodied by the inverter according to a primary frequency modulation requirement; step 5, configuring a gain coefficient of a negative droop link to enable an equivalent droop coefficient which should be reflected by the inverter to meet requirements; by introducing a negative droop link, parameter design difficulty caused by coupling of a damping characteristic and a droop characteristic in VSG control is overcome, and the droop coefficient of the inverter is within a reasonable range while the stability of the inverter under VSG control is ensured.

The present invention provides a compound and a polymer with dynamic functions formed therefrom, wherein the compound is 2,2′-(1,2-ethylenedioxy)acetoacetate diethylthioester. A new compound is provided in the present application, and a novel polymer with dynamic functions is formed by polymerizing the compound. The polymer material not only has good dynamic properties, but also can realize repeated processing and recycling, and has excellent mechanical properties, ductility and optical properties, and low preparation cost.

The invention provides a fuzzy multiple quasi-proportional resonance control method and system for a single-phase grid-connected inverter. The fuzzy multiple quasi-proportional resonance control method comprises the following steps: acquiring an output current of the single-phase grid-connected inverter; based on the output current of the single-phase grid-connected inverter, high-frequency and low-frequency current components are separated through a preset filter, high-frequency components are filtered out, resonance peaks are suppressed through active damping, and network access current is obtained; and accessing a preset multiple quasi-proportional resonance controller based on the network access current, and performing network access current harmonic suppression through fuzzy multiple quasi-proportional resonance control to complete current network access. According to the invention, the problem of poor grid-connected current control capability and low-order harmonic suppression capability in the existing power grid is solved.

The invention belongs to the technical field of positioning and navigation, and particularly discloses a GNSS / DR (Global Navigation Satellite System / Digital Radio) tight integration navigation method based on an SINS (Strapdown Inertial Navigation System). The method comprises the following steps of: inputting a difference value between a pseudo range calculated by a GNSS (Global Navigation Satellite System) and a position calculated by an SINS (Strapdown Inertial Navigation System) into a filter as an observed quantity, and performing state error estimation; and correcting a navigation positioning result by using a state error estimation result, and outputting the corrected positioning result as a tightly integrated navigation positioning result. According to the scheme, the technical problems that an existing SINS / GNSS integrated navigation system is weak in anti-interference capacity, poor in system observability and low in precision are solved.

This invention discloses a method and system for estimating fuel cell parameters based on adaptive subset simulation. It transforms the updating of the posterior distribution of parameters into a structural reliability problem, constructs a limit state function using measurement data to form an intermediate failure domain, and generates conditional samples using the MCMC method to progressively approximate the target posterior probability distribution, thereby achieving parameter estimation of the fuel cell system. This method does not require a Gaussian prior assumption, can adaptively adjust algorithm parameters to ensure the reliability of the estimation results, and can comprehensively characterize the probability distribution of unknown parameters, achieving accurate estimation of fuel cell system parameters.